<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_us-gaap_InsuranceLossReservesAbstract_4D1A29118DC548F496E79FB6F2AA8B44_label_en-US" xlink:label="lab_us-gaap_InsuranceLossReservesAbstract_95450ABE9233553CAEECA1843030BB84" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance Loss Reserves [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InsuranceLossReservesAbstract" xlink:label="loc_us-gaap_InsuranceLossReservesAbstract_95450ABE9233553CAEECA1843030BB84" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InsuranceLossReservesAbstract_95450ABE9233553CAEECA1843030BB84" xlink:to="lab_us-gaap_InsuranceLossReservesAbstract_95450ABE9233553CAEECA1843030BB84" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementTable_FEC12A0B8B8F373DAED49FB6F2AA55FA_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable_9C436BBA3C3B5CB4984701C2EB9F7C4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:label id="lab_us-gaap_StatementTable_FEC12A0B8B8F373DAED49FB6F2AA55FA_label_en-US" xlink:label="lab_us-gaap_StatementTable_9C436BBA3C3B5CB4984701C2EB9F7C4C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_9C436BBA3C3B5CB4984701C2EB9F7C4C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable_9C436BBA3C3B5CB4984701C2EB9F7C4C" xlink:to="lab_us-gaap_StatementTable_9C436BBA3C3B5CB4984701C2EB9F7C4C" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementScenarioAxis_3ED46707D98834FAEFE89FB6F2AA4584_terseLabel_en-US" xlink:label="lab_us-gaap_StatementScenarioAxis_D3DB40D5961554DAA550AD0805357A5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementScenarioAxis_3ED46707D98834FAEFE89FB6F2AA4584_label_en-US" xlink:label="lab_us-gaap_StatementScenarioAxis_D3DB40D5961554DAA550AD0805357A5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_D3DB40D5961554DAA550AD0805357A5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementScenarioAxis_D3DB40D5961554DAA550AD0805357A5A" xlink:to="lab_us-gaap_StatementScenarioAxis_D3DB40D5961554DAA550AD0805357A5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScenarioUnspecifiedDomain_AE9982BF35FFD1364E019FB6F2AA006D_terseLabel_en-US" xlink:label="lab_us-gaap_ScenarioUnspecifiedDomain_36189881F4615CD4BF66BDE548678E50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario, Unspecified [Domain]</link:label>
    <link:label id="lab_us-gaap_ScenarioUnspecifiedDomain_AE9982BF35FFD1364E019FB6F2AA006D_label_en-US" xlink:label="lab_us-gaap_ScenarioUnspecifiedDomain_36189881F4615CD4BF66BDE548678E50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario, Unspecified [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_36189881F4615CD4BF66BDE548678E50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_36189881F4615CD4BF66BDE548678E50" xlink:to="lab_us-gaap_ScenarioUnspecifiedDomain_36189881F4615CD4BF66BDE548678E50" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementLineItems_36C137F7E1DEC784EE309FB6F2AA5C5D_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_2260D19FE3EC52C8B0898203FAF5A3AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_StatementLineItems_36C137F7E1DEC784EE309FB6F2AA5C5D_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_2260D19FE3EC52C8B0898203FAF5A3AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_2260D19FE3EC52C8B0898203FAF5A3AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems_2260D19FE3EC52C8B0898203FAF5A3AA" xlink:to="lab_us-gaap_StatementLineItems_2260D19FE3EC52C8B0898203FAF5A3AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_955C855B937B799898219FB6F2AAA478_periodStartLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_93B31DD48084549CABEC2A79018B948D" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Gross reserve for loss and loss expense, at beginning of year</link:label>
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_955C855B937B799898219FB6F2AAA478_label_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_93B31DD48084549CABEC2A79018B948D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Claims and Claims Adjustment Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_93B31DD48084549CABEC2A79018B948D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_93B31DD48084549CABEC2A79018B948D" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_93B31DD48084549CABEC2A79018B948D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_8778EA181E6926AD12C69FB6F2AA9BE7_periodStartLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_BD8D3619BCA05A5286F45E89AB77835E" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Less: reinsurance recoverable on unpaid loss and loss expense, at beginning of year</link:label>
    <link:label id="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_8778EA181E6926AD12C69FB6F2AA9BE7_label_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_BD8D3619BCA05A5286F45E89AB77835E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reinsurance Recoverable for Unpaid Claims and Claims Adjustments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments" xlink:label="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_BD8D3619BCA05A5286F45E89AB77835E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_BD8D3619BCA05A5286F45E89AB77835E" xlink:to="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_BD8D3619BCA05A5286F45E89AB77835E" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_D44C8E8EDF180C3F682D9FB6F2AAC1E6_periodStartLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_4FC5292DCCB75E659A59F8D4ECEE1198" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Net reserve for loss and loss expense, at beginning of year</link:label>
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_D44C8E8EDF180C3F682D9FB6F2AAC1E6_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_4FC5292DCCB75E659A59F8D4ECEE1198" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_4FC5292DCCB75E659A59F8D4ECEE1198" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_4FC5292DCCB75E659A59F8D4ECEE1198" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_4FC5292DCCB75E659A59F8D4ECEE1198" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_7DF834198693D8354E049FB6F2AAB091_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_39FDD346B1335A7E89BBBBAFB551250C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incurred loss and loss expense for claims occurring in the current year</link:label>
    <link:label id="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_7DF834198693D8354E049FB6F2AAB091_label_en-US" xlink:label="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_39FDD346B1335A7E89BBBBAFB551250C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Year Claims and Claims Adjustment Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_39FDD346B1335A7E89BBBBAFB551250C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_39FDD346B1335A7E89BBBBAFB551250C" xlink:to="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_39FDD346B1335A7E89BBBBAFB551250C" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_60C69F9FB23AEDE16B9C9FB6F2ABB117_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_13BAB4AC52035E599DE2C06C1C96728D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incurred loss and loss expense for claims occurring in the prior years</link:label>
    <link:label id="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_60C69F9FB23AEDE16B9C9FB6F2ABB117_label_en-US" xlink:label="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_13BAB4AC52035E599DE2C06C1C96728D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prior Year Claims and Claims Adjustment Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_13BAB4AC52035E599DE2C06C1C96728D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_13BAB4AC52035E599DE2C06C1C96728D" xlink:to="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_13BAB4AC52035E599DE2C06C1C96728D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_1537B75BE67EF152D4869FB6F2AB33AC_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_65B8DAEB68C6555BA604ADDE331E636D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total incurred loss and loss expense</link:label>
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_1537B75BE67EF152D4869FB6F2AB33AC_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_65B8DAEB68C6555BA604ADDE331E636D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_65B8DAEB68C6555BA604ADDE331E636D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_65B8DAEB68C6555BA604ADDE331E636D" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_65B8DAEB68C6555BA604ADDE331E636D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_A15A17445A586D5545399FB6F2ABE7A2_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_8EAB6E154AC65943AAE0708D6365FEF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Paid loss and loss expense for claims occurring in current year</link:label>
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_A15A17445A586D5545399FB6F2ABE7A2_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_8EAB6E154AC65943AAE0708D6365FEF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_8EAB6E154AC65943AAE0708D6365FEF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_8EAB6E154AC65943AAE0708D6365FEF0" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_8EAB6E154AC65943AAE0708D6365FEF0" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_25C4796DB11ADE8BE7549FB6F2AB2AB1_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_C28B8679FA685515B3EDBC61CBE05AF2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Paid loss and loss expense for claims occurring in prior years</link:label>
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_25C4796DB11ADE8BE7549FB6F2AB2AB1_label_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_C28B8679FA685515B3EDBC61CBE05AF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_C28B8679FA685515B3EDBC61CBE05AF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_C28B8679FA685515B3EDBC61CBE05AF2" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_C28B8679FA685515B3EDBC61CBE05AF2" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_1C173B162838B554D7859FB6F2AB3DF5_totalLabel_en-US" xlink:label="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_7816786DC2C25F81B22152B527B2DB26" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total paid loss and loss expense</link:label>
    <link:label id="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_1C173B162838B554D7859FB6F2AB3DF5_label_en-US" xlink:label="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_7816786DC2C25F81B22152B527B2DB26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForLossesAndLossAdjustmentExpense" xlink:label="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_7816786DC2C25F81B22152B527B2DB26" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_7816786DC2C25F81B22152B527B2DB26" xlink:to="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_7816786DC2C25F81B22152B527B2DB26" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_A63F92A5CE9B762E40DF9FB6F2ABF05D_periodEndLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_5B6AE5EBF97B5570985C0C2B845A30F2" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Net reserve for loss and loss expense, at end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_5B6AE5EBF97B5570985C0C2B845A30F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_5B6AE5EBF97B5570985C0C2B845A30F2" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_5B6AE5EBF97B5570985C0C2B845A30F2" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_790129DE750608C658839FB6F2ABB575_periodEndLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_D5D612515CF25C05B54A17D61D11610D" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Add: reinsurance recoverable on unpaid loss and loss expense, at end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments" xlink:label="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_D5D612515CF25C05B54A17D61D11610D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_D5D612515CF25C05B54A17D61D11610D" xlink:to="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_D5D612515CF25C05B54A17D61D11610D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_60D623E739ADEB81E9559FB6F2ABAD60_periodEndLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_143161D0D6D8550EB1C2CA0ECFAA1A15" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Gross reserve for loss and loss expense, at end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_143161D0D6D8550EB1C2CA0ECFAA1A15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_143161D0D6D8550EB1C2CA0ECFAA1A15" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_143161D0D6D8550EB1C2CA0ECFAA1A15" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve_B471654F0E959A05626C9FB6F2AB58F2_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve_D4EA27F08BD15F36896503D35F50C685" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase of net loss and loss expense reserves</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve_B471654F0E959A05626C9FB6F2AB58F2_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve_D4EA27F08BD15F36896503D35F50C685" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve" xlink:label="loc_us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve_D4EA27F08BD15F36896503D35F50C685" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve_D4EA27F08BD15F36896503D35F50C685" xlink:to="lab_us-gaap_IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve_D4EA27F08BD15F36896503D35F50C685" xlink:type="arc" />
    <link:label id="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_AB87FB55A5580F67DEF99FB6F2AC6ACC_verboseLabel_en-US" xlink:label="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_91EA4F5F5BBD5713B878A1846970B519" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Anticipated recoveries for salvage and subrogation claims</link:label>
    <link:label id="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_AB87FB55A5580F67DEF99FB6F2AC6ACC_label_en-US" xlink:label="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_91EA4F5F5BBD5713B878A1846970B519" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Salvage and Subrogation Recoveries, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalvageAndSubrogationRecoveriesValue" xlink:label="loc_us-gaap_SalvageAndSubrogationRecoveriesValue_91EA4F5F5BBD5713B878A1846970B519" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SalvageAndSubrogationRecoveriesValue_91EA4F5F5BBD5713B878A1846970B519" xlink:to="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_91EA4F5F5BBD5713B878A1846970B519" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_CF2A1E56979F6AB93666101EE647CF6C_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_1D7A2CF839215D9BBFD2B69C4FB0102E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_1D7A2CF839215D9BBFD2B69C4FB0102E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_1D7A2CF839215D9BBFD2B69C4FB0102E" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract_1D7A2CF839215D9BBFD2B69C4FB0102E" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesFairValue_1A6EA68A2A5A87EBB608101EE647F208_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesFairValue_ED6AA3F50BD75F7FBBD3391E5C694F0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed income securities, held-to-maturity, fair value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesFairValue_1A6EA68A2A5A87EBB608101EE647F208_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesFairValue_ED6AA3F50BD75F7FBBD3391E5C694F0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_ED6AA3F50BD75F7FBBD3391E5C694F0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_ED6AA3F50BD75F7FBBD3391E5C694F0A" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesFairValue_ED6AA3F50BD75F7FBBD3391E5C694F0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_27752D28FC8EF592F3AE101EE647B94E_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_44EAC55346F155908910B7F01434443C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fixed income securities, available-for-sale, amortized cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_27752D28FC8EF592F3AE101EE647B94E_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_44EAC55346F155908910B7F01434443C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Debt Securities, Amortized Cost Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_44EAC55346F155908910B7F01434443C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_44EAC55346F155908910B7F01434443C" xlink:to="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_44EAC55346F155908910B7F01434443C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis_F90AC99DB39E4C2A1928101EE647457D_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis_6F8A9758A49A54CBA656DA0AA2787E03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity securities, available-for-sale, cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis_F90AC99DB39E4C2A1928101EE647457D_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis_6F8A9758A49A54CBA656DA0AA2787E03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Equity Securities, Amortized Cost Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis_6F8A9758A49A54CBA656DA0AA2787E03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis_6F8A9758A49A54CBA656DA0AA2787E03" xlink:to="lab_us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis_6F8A9758A49A54CBA656DA0AA2787E03" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_4D4313F2D34C1BA9049E101EE64707DC_terseLabel_en-US" xlink:label="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_27645BFA5F15578498DC57F7F98FC563" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premiums receivable, allowance for uncollectible accounts</link:label>
    <link:label id="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_4D4313F2D34C1BA9049E101EE64707DC_label_en-US" xlink:label="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_27645BFA5F15578498DC57F7F98FC563" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums Receivable, Allowance for Doubtful Accounts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts" xlink:label="loc_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_27645BFA5F15578498DC57F7F98FC563" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_27645BFA5F15578498DC57F7F98FC563" xlink:to="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccounts_27645BFA5F15578498DC57F7F98FC563" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceRecoverablesAllowance_87754F55FF454A559705101EE6489A3A_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverablesAllowance_C126320DC02055719FB082D266EB41B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance recoverable, allowance for uncollectible accounts</link:label>
    <link:label id="lab_us-gaap_ReinsuranceRecoverablesAllowance_87754F55FF454A559705101EE6489A3A_label_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverablesAllowance_C126320DC02055719FB082D266EB41B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reinsurance Recoverables, Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceRecoverablesAllowance" xlink:label="loc_us-gaap_ReinsuranceRecoverablesAllowance_C126320DC02055719FB082D266EB41B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceRecoverablesAllowance_C126320DC02055719FB082D266EB41B0" xlink:to="lab_us-gaap_ReinsuranceRecoverablesAllowance_C126320DC02055719FB082D266EB41B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_9696FB45444A5B79B0C7101EE648893A_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_D5B90D6BB6825D5EBB8FB96E69532B58" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property and equipment, accumulated depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_9696FB45444A5B79B0C7101EE648893A_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_D5B90D6BB6825D5EBB8FB96E69532B58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_D5B90D6BB6825D5EBB8FB96E69532B58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_D5B90D6BB6825D5EBB8FB96E69532B58" xlink:to="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_D5B90D6BB6825D5EBB8FB96E69532B58" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockParOrStatedValuePerShare_D8BF40850E1BD01AB2FC101EE6489197_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockParOrStatedValuePerShare_88009203553A52D6934E07FCE41B6219" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock, par value per share</link:label>
    <link:label id="lab_us-gaap_PreferredStockParOrStatedValuePerShare_D8BF40850E1BD01AB2FC101EE6489197_label_en-US" xlink:label="lab_us-gaap_PreferredStockParOrStatedValuePerShare_88009203553A52D6934E07FCE41B6219" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Par or Stated Value Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_88009203553A52D6934E07FCE41B6219" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockParOrStatedValuePerShare_88009203553A52D6934E07FCE41B6219" xlink:to="lab_us-gaap_PreferredStockParOrStatedValuePerShare_88009203553A52D6934E07FCE41B6219" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_AEB50CC6F68B34BD45D9101EE6486347_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_B529219056C7580FAC6504F7AD80A0BC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock, shares authorized</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_AEB50CC6F68B34BD45D9101EE6486347_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_B529219056C7580FAC6504F7AD80A0BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_B529219056C7580FAC6504F7AD80A0BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesAuthorized_B529219056C7580FAC6504F7AD80A0BC" xlink:to="lab_us-gaap_PreferredStockSharesAuthorized_B529219056C7580FAC6504F7AD80A0BC" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_D5A8C83A37B958C072E3101EE648EE9D_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued_AD9D393A04D65A72B1E855830A648917" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock, shares issued</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_D5A8C83A37B958C072E3101EE648EE9D_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued_AD9D393A04D65A72B1E855830A648917" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_AD9D393A04D65A72B1E855830A648917" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesIssued_AD9D393A04D65A72B1E855830A648917" xlink:to="lab_us-gaap_PreferredStockSharesIssued_AD9D393A04D65A72B1E855830A648917" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockSharesOutstanding_255C7F6F50727AA634A6101EE648B399_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesOutstanding_23F615B3D2965AB9BAFCA35B709DFBAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock, shares outstanding</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesOutstanding_255C7F6F50727AA634A6101EE648B399_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesOutstanding_23F615B3D2965AB9BAFCA35B709DFBAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_23F615B3D2965AB9BAFCA35B709DFBAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesOutstanding_23F615B3D2965AB9BAFCA35B709DFBAE" xlink:to="lab_us-gaap_PreferredStockSharesOutstanding_23F615B3D2965AB9BAFCA35B709DFBAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_D29453E1F10ED510DC4B101EE64888BB_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare_89488159FCCA591F8C226FA270BA3096" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, par value per share</link:label>
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_D29453E1F10ED510DC4B101EE64888BB_label_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare_89488159FCCA591F8C226FA270BA3096" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Par or Stated Value Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_89488159FCCA591F8C226FA270BA3096" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockParOrStatedValuePerShare_89488159FCCA591F8C226FA270BA3096" xlink:to="lab_us-gaap_CommonStockParOrStatedValuePerShare_89488159FCCA591F8C226FA270BA3096" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_A409C74760A4D15305AD101EE649C314_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_3FFBAFE1843755B193ED97A43F461DD7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares authorized</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_A409C74760A4D15305AD101EE649C314_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_3FFBAFE1843755B193ED97A43F461DD7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_3FFBAFE1843755B193ED97A43F461DD7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized_3FFBAFE1843755B193ED97A43F461DD7" xlink:to="lab_us-gaap_CommonStockSharesAuthorized_3FFBAFE1843755B193ED97A43F461DD7" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesIssued_61BD17FBC94696715EA6101EE649A70C_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_C0C8982231355BEBB3961EB0FF48C4FF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares issued</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_61BD17FBC94696715EA6101EE649A70C_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_C0C8982231355BEBB3961EB0FF48C4FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_C0C8982231355BEBB3961EB0FF48C4FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesIssued_C0C8982231355BEBB3961EB0FF48C4FF" xlink:to="lab_us-gaap_CommonStockSharesIssued_C0C8982231355BEBB3961EB0FF48C4FF" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockShares_E46BE31526B616E6E58A101EE649A8D2_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockShares_51E33CC9FB995CB7A12C0256F8EBA499" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Treasury stock, shares</link:label>
    <link:label id="lab_us-gaap_TreasuryStockShares_E46BE31526B616E6E58A101EE649A8D2_label_en-US" xlink:label="lab_us-gaap_TreasuryStockShares_51E33CC9FB995CB7A12C0256F8EBA499" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="loc_us-gaap_TreasuryStockShares_51E33CC9FB995CB7A12C0256F8EBA499" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockShares_51E33CC9FB995CB7A12C0256F8EBA499" xlink:to="lab_us-gaap_TreasuryStockShares_51E33CC9FB995CB7A12C0256F8EBA499" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_49B269D8EB50A02EDAC3A04B702D04F4_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_A14237BFDF8B5BBEB58996E9F018352D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_A14237BFDF8B5BBEB58996E9F018352D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_A14237BFDF8B5BBEB58996E9F018352D" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_A14237BFDF8B5BBEB58996E9F018352D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C60DE15C1DA18BA4B15BA04B702F7A3C_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8475F669401A523B903C7F55CAD10C68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Table]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_C60DE15C1DA18BA4B15BA04B702F7A3C_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8475F669401A523B903C7F55CAD10C68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8475F669401A523B903C7F55CAD10C68" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8475F669401A523B903C7F55CAD10C68" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8475F669401A523B903C7F55CAD10C68" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis_61893B214355CE4026B4A04B702F7FEE_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis_6844D1B644F9582197567AF77D8C9E30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments by Category [Axis]</link:label>
    <link:label id="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis_61893B214355CE4026B4A04B702F7FEE_label_en-US" xlink:label="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis_6844D1B644F9582197567AF77D8C9E30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments by Category [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnInvestmentsByCategoryAxis" xlink:label="loc_us-gaap_GainLossOnInvestmentsByCategoryAxis_6844D1B644F9582197567AF77D8C9E30" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnInvestmentsByCategoryAxis_6844D1B644F9582197567AF77D8C9E30" xlink:to="lab_us-gaap_GainLossOnInvestmentsByCategoryAxis_6844D1B644F9582197567AF77D8C9E30" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_43931C4A214AF94212ACA04B702FE16B_label_en-US" xlink:label="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_55A217C397BD549F8ECC151B9D78094E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marketable Securities and Investments Held at Cost [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" xlink:label="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_55A217C397BD549F8ECC151B9D78094E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_55A217C397BD549F8ECC151B9D78094E" xlink:to="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_55A217C397BD549F8ECC151B9D78094E" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesMember_C1340D2429626C7269FCA04B702FC231_terseLabel_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesMember_560700C0B2A854368B171547E8343C36" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities [Member]</link:label>
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesMember_C1340D2429626C7269FCA04B702FC231_label_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesMember_560700C0B2A854368B171547E8343C36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldtomaturitySecuritiesMember" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesMember_560700C0B2A854368B171547E8343C36" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldtomaturitySecuritiesMember_560700C0B2A854368B171547E8343C36" xlink:to="lab_us-gaap_HeldtomaturitySecuritiesMember_560700C0B2A854368B171547E8343C36" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableforsaleSecuritiesMember_C1AE659BA2C7136090FDA04B702FE26C_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableforsaleSecuritiesMember_0D1F3DFECFA954B7A25665C70887D1E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities [Member]</link:label>
    <link:label id="lab_us-gaap_AvailableforsaleSecuritiesMember_C1AE659BA2C7136090FDA04B702FE26C_label_en-US" xlink:label="lab_us-gaap_AvailableforsaleSecuritiesMember_0D1F3DFECFA954B7A25665C70887D1E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableforsaleSecuritiesMember" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesMember_0D1F3DFECFA954B7A25665C70887D1E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableforsaleSecuritiesMember_0D1F3DFECFA954B7A25665C70887D1E2" xlink:to="lab_us-gaap_AvailableforsaleSecuritiesMember_0D1F3DFECFA954B7A25665C70887D1E2" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsMember_C1DE753B5B1657E47C55A04B703048DE_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsMember_E48C245D5548535B944FBD085753DDD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments [Member]</link:label>
    <link:label id="lab_us-gaap_InvestmentsMember_C1DE753B5B1657E47C55A04B703048DE_label_en-US" xlink:label="lab_us-gaap_InvestmentsMember_E48C245D5548535B944FBD085753DDD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsMember" xlink:label="loc_us-gaap_InvestmentsMember_E48C245D5548535B944FBD085753DDD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsMember_E48C245D5548535B944FBD085753DDD8" xlink:to="lab_us-gaap_InvestmentsMember_E48C245D5548535B944FBD085753DDD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_69B8D1E55FFB15C6A03AA04B7030B786_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_675909D59DBB5327B739B5018AAEE0BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_69B8D1E55FFB15C6A03AA04B7030B786_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_675909D59DBB5327B739B5018AAEE0BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_675909D59DBB5327B739B5018AAEE0BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_675909D59DBB5327B739B5018AAEE0BF" xlink:to="lab_us-gaap_StatementEquityComponentsAxis_675909D59DBB5327B739B5018AAEE0BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityComponentDomain_F902A514E1262F8EAC7BA04B70307C2C_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_F38974765D8F5AE8B5B39C27C666182F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:label id="lab_us-gaap_EquityComponentDomain_F902A514E1262F8EAC7BA04B70307C2C_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_F38974765D8F5AE8B5B39C27C666182F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_F38974765D8F5AE8B5B39C27C666182F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityComponentDomain_F38974765D8F5AE8B5B39C27C666182F" xlink:to="lab_us-gaap_EquityComponentDomain_F38974765D8F5AE8B5B39C27C666182F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherThanTemporaryImpairmentMember_443FAD6BF0E60AEB83BAA04B7030F2D5_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherThanTemporaryImpairmentMember_63FEBBC7E8BB5A46908E3E6791148D49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other-than-Temporary Impairment [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherThanTemporaryImpairmentMember_443FAD6BF0E60AEB83BAA04B7030F2D5_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherThanTemporaryImpairmentMember_63FEBBC7E8BB5A46908E3E6791148D49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other-than-Temporary Impairment Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherThanTemporaryImpairmentMember" xlink:label="loc_us-gaap_AccumulatedOtherThanTemporaryImpairmentMember_63FEBBC7E8BB5A46908E3E6791148D49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherThanTemporaryImpairmentMember_63FEBBC7E8BB5A46908E3E6791148D49" xlink:to="lab_us-gaap_AccumulatedOtherThanTemporaryImpairmentMember_63FEBBC7E8BB5A46908E3E6791148D49" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_770F2124E398CE390E05A04B7030ECFC_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_A666D9FE9D5F5D7CB7884AF55CAE407F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Net Unrealized Investment Gain (Loss) [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_770F2124E398CE390E05A04B7030ECFC_label_en-US" xlink:label="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_A666D9FE9D5F5D7CB7884AF55CAE407F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_A666D9FE9D5F5D7CB7884AF55CAE407F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_A666D9FE9D5F5D7CB7884AF55CAE407F" xlink:to="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_A666D9FE9D5F5D7CB7884AF55CAE407F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C900504131B79F22EE1EA04B70314C14_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_04C71054714F56BC81AC7B4B38B2BD83" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Defined Benefit Plans Adjustment [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_C900504131B79F22EE1EA04B70314C14_label_en-US" xlink:label="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_04C71054714F56BC81AC7B4B38B2BD83" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_04C71054714F56BC81AC7B4B38B2BD83" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_04C71054714F56BC81AC7B4B38B2BD83" xlink:to="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_04C71054714F56BC81AC7B4B38B2BD83" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1D84C4AABFC59A31C730A04B703105A4_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7D0C482C21085A45BF2A4BAAB43F2321" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive income (loss) [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_1D84C4AABFC59A31C730A04B703105A4_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7D0C482C21085A45BF2A4BAAB43F2321" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AOCI Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7D0C482C21085A45BF2A4BAAB43F2321" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7D0C482C21085A45BF2A4BAAB43F2321" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_7D0C482C21085A45BF2A4BAAB43F2321" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_38CAB579490A84D64617A04B7031D3A0_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C6A05A5B59895E908E50F6E70C0DDE8A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Line Items]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_38CAB579490A84D64617A04B7031D3A0_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C6A05A5B59895E908E50F6E70C0DDE8A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C6A05A5B59895E908E50F6E70C0DDE8A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C6A05A5B59895E908E50F6E70C0DDE8A" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C6A05A5B59895E908E50F6E70C0DDE8A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_54DDD6C054742D2C36DDA04B7031C212_periodStartLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4E95686D84065870B4BA0E6F1B270D60" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance December,</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_54DDD6C054742D2C36DDA04B7031C212_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4E95686D84065870B4BA0E6F1B270D60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4E95686D84065870B4BA0E6F1B270D60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4E95686D84065870B4BA0E6F1B270D60" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4E95686D84065870B4BA0E6F1B270D60" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_F65527F3FFB8EA4A8A7CA04B70327F22_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_D6E6E835D04F517AB2D5BDA110FCADC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OCI before reclassifications</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_F65527F3FFB8EA4A8A7CA04B70327F22_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_D6E6E835D04F517AB2D5BDA110FCADC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), before Reclassifications, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_D6E6E835D04F517AB2D5BDA110FCADC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_D6E6E835D04F517AB2D5BDA110FCADC8" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_D6E6E835D04F517AB2D5BDA110FCADC8" xlink:type="arc" />
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_F8609407F65EDB27C4B5A04B70321734_negatedLabel_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_AF1E92C2F6E25970BBBCAFD4EF79DC3C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Amounts reclassified into net income: Non-credit other-than-temporary impairment</link:label>
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_F8609407F65EDB27C4B5A04B70321734_label_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_AF1E92C2F6E25970BBBCAFD4EF79DC3C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income Loss Reclassification Adjustment From AOCI For Non Credit Other Than Temporary Impaired Securities Net Of Tax</link:label>
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_F8609407F65EDB27C4B5A04B70321734_documentation_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_AF1E92C2F6E25970BBBCAFD4EF79DC3C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount after tax of reclassification adjustment from accumulated other comprehensive income related to non-credit OTTI securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax" xlink:label="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_AF1E92C2F6E25970BBBCAFD4EF79DC3C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_AF1E92C2F6E25970BBBCAFD4EF79DC3C" xlink:to="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_AF1E92C2F6E25970BBBCAFD4EF79DC3C" xlink:type="arc" />
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_BA00718658C9A0DF807DA04B70325071_negatedLabel_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_5513C8789AC751A799BA51DADA9719F7" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Amount reclassified from AOCI, HTM</link:label>
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_BA00718658C9A0DF807DA04B70325071_label_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_5513C8789AC751A799BA51DADA9719F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Net of Tax</link:label>
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_BA00718658C9A0DF807DA04B70325071_documentation_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_5513C8789AC751A799BA51DADA9719F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net of tax amount of the reclassification adjustment related to held-to-maturity securities transferred from the available-for-sale category. This amount includes amortization and amounts realized from the disposal of these securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax" xlink:label="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_5513C8789AC751A799BA51DADA9719F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_5513C8789AC751A799BA51DADA9719F7" xlink:to="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_5513C8789AC751A799BA51DADA9719F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_FAF8810A7D58A8D44012A04B703235CD_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_26702CE0BE7D50EEB3E05706AF6DD63E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">OCI before reclassifications, Defined Benefit Pension and Post Retirement Plans</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_FAF8810A7D58A8D44012A04B703235CD_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_26702CE0BE7D50EEB3E05706AF6DD63E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_26702CE0BE7D50EEB3E05706AF6DD63E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_26702CE0BE7D50EEB3E05706AF6DD63E" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_26702CE0BE7D50EEB3E05706AF6DD63E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_A2472C1280D2BF3EE820A04B703340ED_negatedLabel_en-US" xlink:label="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E8ABB5CADE195BE2BB824D89F9826CD6" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Amount reclassified from AOCI</link:label>
    <link:label id="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_A2472C1280D2BF3EE820A04B703340ED_label_en-US" xlink:label="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E8ABB5CADE195BE2BB824D89F9826CD6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E8ABB5CADE195BE2BB824D89F9826CD6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E8ABB5CADE195BE2BB824D89F9826CD6" xlink:to="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_E8ABB5CADE195BE2BB824D89F9826CD6" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_0E6A68D19DEDA7F9E7B6A04B7033F4B2_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_4BB2B21B90BB5931854905F62C6EE024" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Amounts reclassified from AOCI,All other</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_0E6A68D19DEDA7F9E7B6A04B7033F4B2_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_4BB2B21B90BB5931854905F62C6EE024" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_4BB2B21B90BB5931854905F62C6EE024" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_4BB2B21B90BB5931854905F62C6EE024" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_4BB2B21B90BB5931854905F62C6EE024" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_163D787B1AA67C2C2400A04B70339ED6_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_09404B1BBEEF5198AD3316BD4D2BFD62" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_163D787B1AA67C2C2400A04B70339ED6_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_09404B1BBEEF5198AD3316BD4D2BFD62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_09404B1BBEEF5198AD3316BD4D2BFD62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_09404B1BBEEF5198AD3316BD4D2BFD62" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_09404B1BBEEF5198AD3316BD4D2BFD62" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3E9697E06D769E1052ACA04B7033644B_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2EA9D198BE905923AF3A6B81A457C564" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss)</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3E9697E06D769E1052ACA04B7033644B_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2EA9D198BE905923AF3A6B81A457C564" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2EA9D198BE905923AF3A6B81A457C564" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2EA9D198BE905923AF3A6B81A457C564" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2EA9D198BE905923AF3A6B81A457C564" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_B107574A6217FE53E61FA04B70335D65_periodEndLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_871DF02AD99A511F988581A86ADFB6ED" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance December,</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_871DF02AD99A511F988581A86ADFB6ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_871DF02AD99A511F988581A86ADFB6ED" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_871DF02AD99A511F988581A86ADFB6ED" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsAbstract_B6732A697A2D6ADD30D2101EE4F638D5_label_en-US" xlink:label="lab_us-gaap_InvestmentsAbstract_3AF14A2B291F501EBEA32EEE946600C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsAbstract" xlink:label="loc_us-gaap_InvestmentsAbstract_3AF14A2B291F501EBEA32EEE946600C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsAbstract_3AF14A2B291F501EBEA32EEE946600C6" xlink:to="lab_us-gaap_InvestmentsAbstract_3AF14A2B291F501EBEA32EEE946600C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_26AC8DF7AB2946F2F67F101EE4F63CA7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_A1960E6F2DA45CBCAFC8F25F37A3F405" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Income [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_26AC8DF7AB2946F2F67F101EE4F63CA7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_A1960E6F2DA45CBCAFC8F25F37A3F405" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Income [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable" xlink:label="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_A1960E6F2DA45CBCAFC8F25F37A3F405" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_A1960E6F2DA45CBCAFC8F25F37A3F405" xlink:to="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryTable_A1960E6F2DA45CBCAFC8F25F37A3F405" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentTypeAxis_2ECF195616057D527EFD101EE4F63934_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeAxis_414C316A00715CBEB104565A7A770C0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Type [Axis]</link:label>
    <link:label id="lab_us-gaap_InvestmentTypeAxis_2ECF195616057D527EFD101EE4F63934_label_en-US" xlink:label="lab_us-gaap_InvestmentTypeAxis_414C316A00715CBEB104565A7A770C0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_414C316A00715CBEB104565A7A770C0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeAxis_414C316A00715CBEB104565A7A770C0A" xlink:to="lab_us-gaap_InvestmentTypeAxis_414C316A00715CBEB104565A7A770C0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_7866F2AE83A8B11F5858101EE4F683A9_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember_0E0E0738CE5453E7B0C5FCC76E68D9CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments [Domain]</link:label>
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_7866F2AE83A8B11F5858101EE4F683A9_label_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember_0E0E0738CE5453E7B0C5FCC76E68D9CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_0E0E0738CE5453E7B0C5FCC76E68D9CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_0E0E0738CE5453E7B0C5FCC76E68D9CD" xlink:to="lab_us-gaap_InvestmentTypeCategorizationMember_0E0E0738CE5453E7B0C5FCC76E68D9CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_FixedMaturitiesMember_6948612B75806ACD88C1101EE4F694A0_terseLabel_en-US" xlink:label="lab_us-gaap_FixedMaturitiesMember_8E17E2DC473A5B5AA204C553D29DBA6A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed Income Securities [Member]</link:label>
    <link:label id="lab_us-gaap_FixedMaturitiesMember_6948612B75806ACD88C1101EE4F694A0_label_en-US" xlink:label="lab_us-gaap_FixedMaturitiesMember_8E17E2DC473A5B5AA204C553D29DBA6A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fixed Maturities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FixedMaturitiesMember" xlink:label="loc_us-gaap_FixedMaturitiesMember_8E17E2DC473A5B5AA204C553D29DBA6A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FixedMaturitiesMember_8E17E2DC473A5B5AA204C553D29DBA6A" xlink:to="lab_us-gaap_FixedMaturitiesMember_8E17E2DC473A5B5AA204C553D29DBA6A" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquitySecuritiesMember_24AE7DBD9492B19B85E1101EE4F6814A_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesMember_E43ED35038725AF89F0F7FC002BD90AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Securities [Member]</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesMember_24AE7DBD9492B19B85E1101EE4F6814A_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesMember_E43ED35038725AF89F0F7FC002BD90AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_E43ED35038725AF89F0F7FC002BD90AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesMember_E43ED35038725AF89F0F7FC002BD90AF" xlink:to="lab_us-gaap_EquitySecuritiesMember_E43ED35038725AF89F0F7FC002BD90AF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortTermInvestmentsMember_7F75E4620D45CCEA58A9101EE4F6DDC8_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermInvestmentsMember_96392D6D76FB58A38E92FAEC774451D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Investments [Member]</link:label>
    <link:label id="lab_us-gaap_ShortTermInvestmentsMember_7F75E4620D45CCEA58A9101EE4F6DDC8_label_en-US" xlink:label="lab_us-gaap_ShortTermInvestmentsMember_96392D6D76FB58A38E92FAEC774451D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-term Investments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermInvestmentsMember" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_96392D6D76FB58A38E92FAEC774451D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermInvestmentsMember_96392D6D76FB58A38E92FAEC774451D8" xlink:to="lab_us-gaap_ShortTermInvestmentsMember_96392D6D76FB58A38E92FAEC774451D8" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherInvestmentsMember_C1B7A0CC2538D59D252B101EE4F73FBF_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherInvestmentsMember_DCDF9234CC9D525298352CEA1B03D5C4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other Investment Portfolio [Member]</link:label>
    <link:label id="lab_us-gaap_OtherInvestmentsMember_C1B7A0CC2538D59D252B101EE4F73FBF_label_en-US" xlink:label="lab_us-gaap_OtherInvestmentsMember_DCDF9234CC9D525298352CEA1B03D5C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Investments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherInvestmentsMember" xlink:label="loc_us-gaap_OtherInvestmentsMember_DCDF9234CC9D525298352CEA1B03D5C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherInvestmentsMember_DCDF9234CC9D525298352CEA1B03D5C4" xlink:to="lab_us-gaap_OtherInvestmentsMember_DCDF9234CC9D525298352CEA1B03D5C4" xlink:type="arc" />
    <link:label id="lab_sigi_InvestmentExpensesMember_2E82A8F24A65D4DF943C101EE4F7CAEB_terseLabel_en-US" xlink:label="lab_sigi_InvestmentExpensesMember_2F2F04B0D7FD58C6A7E1BF051BDAC967" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Expenses [Member]</link:label>
    <link:label id="lab_sigi_InvestmentExpensesMember_2E82A8F24A65D4DF943C101EE4F7CAEB_label_en-US" xlink:label="lab_sigi_InvestmentExpensesMember_2F2F04B0D7FD58C6A7E1BF051BDAC967" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Expenses [Member]</link:label>
    <link:label id="lab_sigi_InvestmentExpensesMember_2E82A8F24A65D4DF943C101EE4F7CAEB_documentation_en-US" xlink:label="lab_sigi_InvestmentExpensesMember_2F2F04B0D7FD58C6A7E1BF051BDAC967" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents expenses incurred in connection with fund investing and obtaining investment income.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_InvestmentExpensesMember" xlink:label="loc_sigi_InvestmentExpensesMember_2F2F04B0D7FD58C6A7E1BF051BDAC967" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_InvestmentExpensesMember_2F2F04B0D7FD58C6A7E1BF051BDAC967" xlink:to="lab_sigi_InvestmentExpensesMember_2F2F04B0D7FD58C6A7E1BF051BDAC967" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_EB75C039D6E0A0010274101EE4F7DA8C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5F1305FBECF056B3BACDE506F6537D14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_EB75C039D6E0A0010274101EE4F7DA8C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5F1305FBECF056B3BACDE506F6537D14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Investment Income [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems" xlink:label="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5F1305FBECF056B3BACDE506F6537D14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5F1305FBECF056B3BACDE506F6537D14" xlink:to="lab_us-gaap_ScheduleOfInvestmentIncomeReportedAmountsByCategoryLineItems_5F1305FBECF056B3BACDE506F6537D14" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetInvestmentIncome_92DC430256E2584B131A101EE4F7A4E4_terseLabel_en-US" xlink:label="lab_us-gaap_NetInvestmentIncome_9B6A7F4E02AB5F5A97FED4445D8843DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net investment income earned</link:label>
    <link:label id="lab_us-gaap_NetInvestmentIncome_92DC430256E2584B131A101EE4F7A4E4_label_en-US" xlink:label="lab_us-gaap_NetInvestmentIncome_9B6A7F4E02AB5F5A97FED4445D8843DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Investment Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetInvestmentIncome" xlink:label="loc_us-gaap_NetInvestmentIncome_9B6A7F4E02AB5F5A97FED4445D8843DF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetInvestmentIncome_9B6A7F4E02AB5F5A97FED4445D8843DF" xlink:to="lab_us-gaap_NetInvestmentIncome_9B6A7F4E02AB5F5A97FED4445D8843DF" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationAbstract_CF6534AFD549A00C1BA9816F5984EEFF_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationAbstract_6D1DB874B16C5FAB89718036F27317F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationAbstract" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationAbstract_6D1DB874B16C5FAB89718036F27317F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationAbstract_6D1DB874B16C5FAB89718036F27317F0" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationAbstract_6D1DB874B16C5FAB89718036F27317F0" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationBySegmentTable_362D248558FA9D39815B816F59848A28_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationBySegmentTable_508403B718B15824B991C9BD402B9A75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, by Segment [Table]</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationBySegmentTable_362D248558FA9D39815B816F59848A28_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationBySegmentTable_508403B718B15824B991C9BD402B9A75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, by Segment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationBySegmentTable" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationBySegmentTable_508403B718B15824B991C9BD402B9A75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationBySegmentTable_508403B718B15824B991C9BD402B9A75" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationBySegmentTable_508403B718B15824B991C9BD402B9A75" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_E83CD3C4F6ECD57B8953816F59848C65_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_FCE4044DAFC855B1831494383C124855" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_E83CD3C4F6ECD57B8953816F59848C65_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_FCE4044DAFC855B1831494383C124855" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_FCE4044DAFC855B1831494383C124855" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_FCE4044DAFC855B1831494383C124855" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis_FCE4044DAFC855B1831494383C124855" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentDomain_6BDE44C788C32690E277816F59843BF9_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain_CD3ACB087BF15B3998773AF5209E6879" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentDomain_6BDE44C788C32690E277816F59843BF9_label_en-US" xlink:label="lab_us-gaap_SegmentDomain_CD3ACB087BF15B3998773AF5209E6879" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_CD3ACB087BF15B3998773AF5209E6879" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain_CD3ACB087BF15B3998773AF5209E6879" xlink:to="lab_us-gaap_SegmentDomain_CD3ACB087BF15B3998773AF5209E6879" xlink:type="arc" />
    <link:label id="lab_sigi_StandardCommercialLinesMember_B96698DA1BBAAF9B915B816F5984A8B0_terseLabel_en-US" xlink:label="lab_sigi_StandardCommercialLinesMember_257FADB7D6D553C5A36329378E5DF484" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Standard Commercial Lines [Member]</link:label>
    <link:label id="lab_sigi_StandardCommercialLinesMember_B96698DA1BBAAF9B915B816F5984A8B0_label_en-US" xlink:label="lab_sigi_StandardCommercialLinesMember_257FADB7D6D553C5A36329378E5DF484" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Standard Commercial Lines [Member]</link:label>
    <link:label id="lab_sigi_StandardCommercialLinesMember_B96698DA1BBAAF9B915B816F5984A8B0_documentation_en-US" xlink:label="lab_sigi_StandardCommercialLinesMember_257FADB7D6D553C5A36329378E5DF484" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents our Standard Commercial Lines of business.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StandardCommercialLinesMember" xlink:label="loc_sigi_StandardCommercialLinesMember_257FADB7D6D553C5A36329378E5DF484" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StandardCommercialLinesMember_257FADB7D6D553C5A36329378E5DF484" xlink:to="lab_sigi_StandardCommercialLinesMember_257FADB7D6D553C5A36329378E5DF484" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_4F7D09CEFF6CB04532E0816F59841E4C_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_D7D8687199905A3EABFC87B6FD85BBCC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Standard Personal Lines [Member]</link:label>
    <link:label id="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_4F7D09CEFF6CB04532E0816F59841E4C_label_en-US" xlink:label="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_D7D8687199905A3EABFC87B6FD85BBCC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property and Casualty, Personal Insurance Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember" xlink:label="loc_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_D7D8687199905A3EABFC87B6FD85BBCC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_D7D8687199905A3EABFC87B6FD85BBCC" xlink:to="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_D7D8687199905A3EABFC87B6FD85BBCC" xlink:type="arc" />
    <link:label id="lab_sigi_ExcessAndSurplusOperationsMember_1D27ECE2FDB7CA797418816F5984E719_terseLabel_en-US" xlink:label="lab_sigi_ExcessAndSurplusOperationsMember_12BA732E4E485F9B9189CE7501AF7CAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excess And Surplus Operations [Member]</link:label>
    <link:label id="lab_sigi_ExcessAndSurplusOperationsMember_1D27ECE2FDB7CA797418816F5984E719_label_en-US" xlink:label="lab_sigi_ExcessAndSurplusOperationsMember_12BA732E4E485F9B9189CE7501AF7CAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excess And Surplus Operations [Member]</link:label>
    <link:label id="lab_sigi_ExcessAndSurplusOperationsMember_1D27ECE2FDB7CA797418816F5984E719_documentation_en-US" xlink:label="lab_sigi_ExcessAndSurplusOperationsMember_12BA732E4E485F9B9189CE7501AF7CAF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the excess and surplus insurance operations.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ExcessAndSurplusOperationsMember" xlink:label="loc_sigi_ExcessAndSurplusOperationsMember_12BA732E4E485F9B9189CE7501AF7CAF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ExcessAndSurplusOperationsMember_12BA732E4E485F9B9189CE7501AF7CAF" xlink:to="lab_sigi_ExcessAndSurplusOperationsMember_12BA732E4E485F9B9189CE7501AF7CAF" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsSegmentMember_F1522CF65828FC933E5D816F598420D0_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsSegmentMember_C1FDAB9DFE8C533D982DF698F7A06FA3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments Segment [Member]</link:label>
    <link:label id="lab_us-gaap_InvestmentsSegmentMember_F1522CF65828FC933E5D816F598420D0_label_en-US" xlink:label="lab_us-gaap_InvestmentsSegmentMember_C1FDAB9DFE8C533D982DF698F7A06FA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsSegmentMember" xlink:label="loc_us-gaap_InvestmentsSegmentMember_C1FDAB9DFE8C533D982DF698F7A06FA3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsSegmentMember_C1FDAB9DFE8C533D982DF698F7A06FA3" xlink:to="lab_us-gaap_InvestmentsSegmentMember_C1FDAB9DFE8C533D982DF698F7A06FA3" xlink:type="arc" />
    <link:label id="lab_sigi_MiscellaneousIncomeMember_708737CA328C0E81FC58816F59857E15_terseLabel_en-US" xlink:label="lab_sigi_MiscellaneousIncomeMember_0D7586BE31B55AEF8D5DD83D9A7F491B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Miscellaneous Income [Member]</link:label>
    <link:label id="lab_sigi_MiscellaneousIncomeMember_708737CA328C0E81FC58816F59857E15_label_en-US" xlink:label="lab_sigi_MiscellaneousIncomeMember_0D7586BE31B55AEF8D5DD83D9A7F491B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Miscellaneous Income [Member]</link:label>
    <link:label id="lab_sigi_MiscellaneousIncomeMember_708737CA328C0E81FC58816F59857E15_documentation_en-US" xlink:label="lab_sigi_MiscellaneousIncomeMember_0D7586BE31B55AEF8D5DD83D9A7F491B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reflects the sum of all insurance related revenue, outside of net premiums earned, in the period not otherwise specified.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MiscellaneousIncomeMember" xlink:label="loc_sigi_MiscellaneousIncomeMember_0D7586BE31B55AEF8D5DD83D9A7F491B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MiscellaneousIncomeMember_0D7586BE31B55AEF8D5DD83D9A7F491B" xlink:to="lab_sigi_MiscellaneousIncomeMember_0D7586BE31B55AEF8D5DD83D9A7F491B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts_49E8948ABF31436D312B816F598581A6_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts_8ADAED3EA5FE573F91E395BE0324CA7E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred policy acquisition costs</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts_49E8948ABF31436D312B816F598581A6_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts_8ADAED3EA5FE573F91E395BE0324CA7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Deferred Policy Acquisition Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts_8ADAED3EA5FE573F91E395BE0324CA7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts_8ADAED3EA5FE573F91E395BE0324CA7E" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts_8ADAED3EA5FE573F91E395BE0324CA7E" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves_F0AEB5D613D845632DF9816F59851007_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves_29C0C76C9C2A5126A12E5E3564D4288D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reserve for loss and loss expenses</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves_F0AEB5D613D845632DF9816F59851007_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves_29C0C76C9C2A5126A12E5E3564D4288D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Liability for Future Policy Benefits, Losses, Claims and Loss Expense Reserves</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves_29C0C76C9C2A5126A12E5E3564D4288D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves_29C0C76C9C2A5126A12E5E3564D4288D" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves_29C0C76C9C2A5126A12E5E3564D4288D" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationUnearnedPremiums_BF0D3BBB017607834F91816F5985617A_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationUnearnedPremiums_1F5DF49692CE5C7D851F5C26DB2DC602" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unearned premiums</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationUnearnedPremiums_BF0D3BBB017607834F91816F5985617A_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationUnearnedPremiums_1F5DF49692CE5C7D851F5C26DB2DC602" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Unearned Premiums</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationUnearnedPremiums" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationUnearnedPremiums_1F5DF49692CE5C7D851F5C26DB2DC602" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationUnearnedPremiums_1F5DF49692CE5C7D851F5C26DB2DC602" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationUnearnedPremiums_1F5DF49692CE5C7D851F5C26DB2DC602" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationPremiumRevenue_114F3A75361C7860F481816F5985D5E6_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationPremiumRevenue_79A4C5E0AAE1535CB8B08286543E7C99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net premiums earned</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationPremiumRevenue_114F3A75361C7860F481816F5985D5E6_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationPremiumRevenue_79A4C5E0AAE1535CB8B08286543E7C99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Premium Revenue</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationPremiumRevenue" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationPremiumRevenue_79A4C5E0AAE1535CB8B08286543E7C99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationPremiumRevenue_79A4C5E0AAE1535CB8B08286543E7C99" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationPremiumRevenue_79A4C5E0AAE1535CB8B08286543E7C99" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome_4AAB9CFA175EBD3D506A816F598564C6_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome_18A13CAD8D2B51AB8312C5CC9B28A31B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net investment income</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome_4AAB9CFA175EBD3D506A816F598564C6_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome_18A13CAD8D2B51AB8312C5CC9B28A31B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Net Investment Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome_18A13CAD8D2B51AB8312C5CC9B28A31B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome_18A13CAD8D2B51AB8312C5CC9B28A31B" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationNetInvestmentIncome_18A13CAD8D2B51AB8312C5CC9B28A31B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense_B58CA6B642C9E8C955AF816F59854C63_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense_54E8F93CD78255F3AD073753F093BACC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss and loss expense incurred</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense_B58CA6B642C9E8C955AF816F59854C63_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense_54E8F93CD78255F3AD073753F093BACC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Benefits, Claims, Losses and Settlement Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense_54E8F93CD78255F3AD073753F093BACC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense_54E8F93CD78255F3AD073753F093BACC" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense_54E8F93CD78255F3AD073753F093BACC" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts_0936171AFFB1566B1295816F5985652A_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts_730BE1D5C9425471A7A4A4E2444ACF6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of deferred policy acquisition costs</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts_0936171AFFB1566B1295816F5985652A_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts_730BE1D5C9425471A7A4A4E2444ACF6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts_730BE1D5C9425471A7A4A4E2444ACF6B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts_730BE1D5C9425471A7A4A4E2444ACF6B" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts_730BE1D5C9425471A7A4A4E2444ACF6B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense_9F34F147AD55893A5E2E816F59854B29_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense_5E55B62FB45055F2A6C180492CEE53E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other operating expenses</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense_9F34F147AD55893A5E2E816F59854B29_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense_5E55B62FB45055F2A6C180492CEE53E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Other Operating Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense_5E55B62FB45055F2A6C180492CEE53E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense_5E55B62FB45055F2A6C180492CEE53E1" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationOtherOperatingExpense_5E55B62FB45055F2A6C180492CEE53E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationPremiumsWritten_8DB68F3CB2542F95A040816F5986AE35_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationPremiumsWritten_763408B3012E51A3B973F882B221592E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net premiums written</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationPremiumsWritten_8DB68F3CB2542F95A040816F5986AE35_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationPremiumsWritten_763408B3012E51A3B973F882B221592E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, Premiums Written</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationPremiumsWritten" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationPremiumsWritten_763408B3012E51A3B973F882B221592E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationPremiumsWritten_763408B3012E51A3B973F882B221592E" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationPremiumsWritten_763408B3012E51A3B973F882B221592E" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherUnderwritingExpense_0000E0E1C9F1E31ADBE1816F5986AB87_terseLabel_en-US" xlink:label="lab_us-gaap_OtherUnderwritingExpense_D8B29E6D697F5BA4A6FC58727AE8A3C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other insurance expenses</link:label>
    <link:label id="lab_us-gaap_OtherUnderwritingExpense_0000E0E1C9F1E31ADBE1816F5986AB87_label_en-US" xlink:label="lab_us-gaap_OtherUnderwritingExpense_D8B29E6D697F5BA4A6FC58727AE8A3C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Underwriting Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherUnderwritingExpense" xlink:label="loc_us-gaap_OtherUnderwritingExpense_D8B29E6D697F5BA4A6FC58727AE8A3C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherUnderwritingExpense_D8B29E6D697F5BA4A6FC58727AE8A3C4" xlink:to="lab_us-gaap_OtherUnderwritingExpense_D8B29E6D697F5BA4A6FC58727AE8A3C4" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherIncome_802E8DBB7FC65D596A70816F5986C1BF_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherIncome_2A7BFDE7468752FB87D12B23E2DF17EE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other income</link:label>
    <link:label id="lab_us-gaap_OtherIncome_802E8DBB7FC65D596A70816F5986C1BF_label_en-US" xlink:label="lab_us-gaap_OtherIncome_2A7BFDE7468752FB87D12B23E2DF17EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIncome" xlink:label="loc_us-gaap_OtherIncome_2A7BFDE7468752FB87D12B23E2DF17EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherIncome_2A7BFDE7468752FB87D12B23E2DF17EE" xlink:to="lab_us-gaap_OtherIncome_2A7BFDE7468752FB87D12B23E2DF17EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_AFBB72E4BB8152D307AB9FB7663D1B24_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_3173F3A3F4C95B2D96F617B42331CF88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Held-to-maturity Securities [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_AFBB72E4BB8152D307AB9FB7663D1B24_label_en-US" xlink:label="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_3173F3A3F4C95B2D96F617B42331CF88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Held-to-maturity Securities [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_3173F3A3F4C95B2D96F617B42331CF88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_3173F3A3F4C95B2D96F617B42331CF88" xlink:to="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_3173F3A3F4C95B2D96F617B42331CF88" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecurityAxis_6597567EB1597E65AECF9FB7663D0181_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecurityAxis_DB59F148B486574AA49132EE993102ED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Security [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtSecurityAxis_6597567EB1597E65AECF9FB7663D0181_label_en-US" xlink:label="lab_us-gaap_DebtSecurityAxis_DB59F148B486574AA49132EE993102ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Security [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtSecurityAxis" xlink:label="loc_us-gaap_DebtSecurityAxis_DB59F148B486574AA49132EE993102ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecurityAxis_DB59F148B486574AA49132EE993102ED" xlink:to="lab_us-gaap_DebtSecurityAxis_DB59F148B486574AA49132EE993102ED" xlink:type="arc" />
    <link:label id="lab_us-gaap_MajorTypesOfDebtSecuritiesDomain_06B9FEC5EA20A58C50569FB7663D6700_terseLabel_en-US" xlink:label="lab_us-gaap_MajorTypesOfDebtSecuritiesDomain_AEBD359AB9095AEABD4B7E9E5C3C7E52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Major Types of Debt Securities [Domain]</link:label>
    <link:label id="lab_us-gaap_MajorTypesOfDebtSecuritiesDomain_06B9FEC5EA20A58C50569FB7663D6700_label_en-US" xlink:label="lab_us-gaap_MajorTypesOfDebtSecuritiesDomain_AEBD359AB9095AEABD4B7E9E5C3C7E52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Major Types of Debt Securities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MajorTypesOfDebtSecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtSecuritiesDomain_AEBD359AB9095AEABD4B7E9E5C3C7E52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MajorTypesOfDebtSecuritiesDomain_AEBD359AB9095AEABD4B7E9E5C3C7E52" xlink:to="lab_us-gaap_MajorTypesOfDebtSecuritiesDomain_AEBD359AB9095AEABD4B7E9E5C3C7E52" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_C8061429B87B5D09B6A59FB7663D0793_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_5329DA74362656D58A580D7DE4524FD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AFS due in one year or less fair value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_C8061429B87B5D09B6A59FB7663D0793_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_5329DA74362656D58A580D7DE4524FD4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_5329DA74362656D58A580D7DE4524FD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_5329DA74362656D58A580D7DE4524FD4" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_5329DA74362656D58A580D7DE4524FD4" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_A3D7D2D73E82B0BEBF8C9FB7663D6A2F_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_8978DD6F03FB5BE98177B1FFEF7ADC7A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AFS due after one year through five years fair value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_A3D7D2D73E82B0BEBF8C9FB7663D6A2F_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_8978DD6F03FB5BE98177B1FFEF7ADC7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_8978DD6F03FB5BE98177B1FFEF7ADC7A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_8978DD6F03FB5BE98177B1FFEF7ADC7A" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_8978DD6F03FB5BE98177B1FFEF7ADC7A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_44520FA43604E3AB202B9FB7663D78C7_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_6C8052B07E8C5987BB724765AE739D3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AFS due after five years through 10 years fair value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_44520FA43604E3AB202B9FB7663D78C7_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_6C8052B07E8C5987BB724765AE739D3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_6C8052B07E8C5987BB724765AE739D3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_6C8052B07E8C5987BB724765AE739D3B" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_6C8052B07E8C5987BB724765AE739D3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_E585F7AB5B37E47FE97B9FB7663DDCAB_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_C2B2851EF6E55C3D807B539E46659D5B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AFS due after 10 years fair value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_E585F7AB5B37E47FE97B9FB7663DDCAB_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_C2B2851EF6E55C3D807B539E46659D5B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_C2B2851EF6E55C3D807B539E46659D5B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_C2B2851EF6E55C3D807B539E46659D5B" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_C2B2851EF6E55C3D807B539E46659D5B" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_8BA360AF8A3EB81AFB629FB7663E36D7_netLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_628BC685456258A6BA101D6B6625A0C5" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Fixed income securities, available-for-sale securities</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_8BA360AF8A3EB81AFB629FB7663E36D7_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_628BC685456258A6BA101D6B6625A0C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_628BC685456258A6BA101D6B6625A0C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_628BC685456258A6BA101D6B6625A0C5" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_628BC685456258A6BA101D6B6625A0C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount_9A1A371F5FAE2D95C3969FB7663E5672_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount_1BC12E51794A5788A7E591B107095C7F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due in one year or less carrying value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount_9A1A371F5FAE2D95C3969FB7663E5672_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount_1BC12E51794A5788A7E591B107095C7F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount_1BC12E51794A5788A7E591B107095C7F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount_1BC12E51794A5788A7E591B107095C7F" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearNetCarryingAmount_1BC12E51794A5788A7E591B107095C7F" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount_E7BF4F5D123011EF90009FB7663ED115_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount_A128CBB651305532A86F753861AFA5B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due after one year through five years carrying value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount_E7BF4F5D123011EF90009FB7663ED115_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount_A128CBB651305532A86F753861AFA5B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount_A128CBB651305532A86F753861AFA5B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount_A128CBB651305532A86F753861AFA5B1" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsNetCarryingAmount_A128CBB651305532A86F753861AFA5B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount_C13F11A716AD9FA1D63C9FB7663E8261_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount_81E01D42CD0B51BB91614D4D52273BA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due after five years through 10 years carrying value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount_C13F11A716AD9FA1D63C9FB7663E8261_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount_81E01D42CD0B51BB91614D4D52273BA5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount_81E01D42CD0B51BB91614D4D52273BA5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount_81E01D42CD0B51BB91614D4D52273BA5" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount_81E01D42CD0B51BB91614D4D52273BA5" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount_C54D6EBE23EE208561809FB7663E0ABF_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount_9922C140FBE052C88A4CC36F33E78306" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due after 10 years carrying value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount_C54D6EBE23EE208561809FB7663E0ABF_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount_9922C140FBE052C88A4CC36F33E78306" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount_9922C140FBE052C88A4CC36F33E78306" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount_9922C140FBE052C88A4CC36F33E78306" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsNetCarryingAmount_9922C140FBE052C88A4CC36F33E78306" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_16567400DE53BF9B0B649FB7663EAD0B_totalLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_EE1DC3A079FF580199CF93FAA780C0AC" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total HTM fixed income securities carrying value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_16567400DE53BF9B0B649FB7663EAD0B_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_EE1DC3A079FF580199CF93FAA780C0AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_EE1DC3A079FF580199CF93FAA780C0AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecurities_EE1DC3A079FF580199CF93FAA780C0AC" xlink:to="lab_us-gaap_HeldToMaturitySecurities_EE1DC3A079FF580199CF93FAA780C0AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue_22FF433D0AE660FFC6B59FB7663E8AC0_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue_437F4509DBFB53A5965B8E9820E9054D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due in one year or less fair value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue_22FF433D0AE660FFC6B59FB7663E8AC0_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue_437F4509DBFB53A5965B8E9820E9054D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue_437F4509DBFB53A5965B8E9820E9054D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue_437F4509DBFB53A5965B8E9820E9054D" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue_437F4509DBFB53A5965B8E9820E9054D" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_F8F9BF1D851D1AC7C2269FB7663E1099_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_0CCA49C1A3F7593AA1028AA093D0778E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due after one year through five years fair value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_F8F9BF1D851D1AC7C2269FB7663E1099_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_0CCA49C1A3F7593AA1028AA093D0778E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_0CCA49C1A3F7593AA1028AA093D0778E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_0CCA49C1A3F7593AA1028AA093D0778E" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_0CCA49C1A3F7593AA1028AA093D0778E" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_D633BB91519B56B5A4889FB7663ED4A5_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_0BF34CCD433B5A1583D5E544C0BB90F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due after five years through 10 years fair value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_D633BB91519B56B5A4889FB7663ED4A5_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_0BF34CCD433B5A1583D5E544C0BB90F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_0BF34CCD433B5A1583D5E544C0BB90F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_0BF34CCD433B5A1583D5E544C0BB90F6" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_0BF34CCD433B5A1583D5E544C0BB90F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue_DE7C8F9E045FB91E030A9FB7663E8A62_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue_EBDE5D316CBC5BF48A257828614C98B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM due after 10 years fair value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue_DE7C8F9E045FB91E030A9FB7663E8A62_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue_EBDE5D316CBC5BF48A257828614C98B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue_EBDE5D316CBC5BF48A257828614C98B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue_EBDE5D316CBC5BF48A257828614C98B2" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue_EBDE5D316CBC5BF48A257828614C98B2" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesFairValue_ABE97A6FEB3E1B4F169C9FB7663EB422_totalLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesFairValue_58EE1426CF545FDDA0A6F727A7FC2EF0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total HTM fixed income securities fair value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_58EE1426CF545FDDA0A6F727A7FC2EF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_58EE1426CF545FDDA0A6F727A7FC2EF0" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesFairValue_58EE1426CF545FDDA0A6F727A7FC2EF0" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingAbstract_F7598321CA80C5615D96101EE6559244_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract_34BE8C035D7C58BB8AF0EE4EDA6AB98C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_34BE8C035D7C58BB8AF0EE4EDA6AB98C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingAbstract_34BE8C035D7C58BB8AF0EE4EDA6AB98C" xlink:to="lab_us-gaap_SegmentReportingAbstract_34BE8C035D7C58BB8AF0EE4EDA6AB98C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_434153EA46FECAB8EB58101EE655FBA4_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_5F36BCAB942E5188A99AD4487454CC3F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Revenue from Continuing Operations By Segment</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_434153EA46FECAB8EB58101EE655FBA4_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_5F36BCAB942E5188A99AD4487454CC3F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from External Customers by Products and Services [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_5F36BCAB942E5188A99AD4487454CC3F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_5F36BCAB942E5188A99AD4487454CC3F" xlink:to="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_5F36BCAB942E5188A99AD4487454CC3F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_DD7CDC6AAB59F2249DF8101EE655219F_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A559ED9FAF6852CC9A44F6CDA6DCF566" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Income from Continuing Operations before Federal Income Tax</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_DD7CDC6AAB59F2249DF8101EE655219F_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A559ED9FAF6852CC9A44F6CDA6DCF566" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A559ED9FAF6852CC9A44F6CDA6DCF566" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A559ED9FAF6852CC9A44F6CDA6DCF566" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A559ED9FAF6852CC9A44F6CDA6DCF566" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_14A4D4D5E964DBA34FA1101EE6553415_terseLabel_en-US" xlink:label="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_B23B8D92C1955987BE33CCE35ADAE066" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Segment Results to Income From Continuing Operations, Before Federal Income Tax</link:label>
    <link:label id="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_14A4D4D5E964DBA34FA1101EE6553415_label_en-US" xlink:label="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_B23B8D92C1955987BE33CCE35ADAE066" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_B23B8D92C1955987BE33CCE35ADAE066" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_B23B8D92C1955987BE33CCE35ADAE066" xlink:to="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTextBlock_B23B8D92C1955987BE33CCE35ADAE066" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_3FFD18F62149FCF1406FB0A03FC5CE1B_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_9FE80834052F5E108B4BEA6D9FD2A162" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Table]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_3FFD18F62149FCF1406FB0A03FC5CE1B_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_9FE80834052F5E108B4BEA6D9FD2A162" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_9FE80834052F5E108B4BEA6D9FD2A162" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_9FE80834052F5E108B4BEA6D9FD2A162" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_9FE80834052F5E108B4BEA6D9FD2A162" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_D7698433AE506A972B4FB0A03FC59D50_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_39A505302C735F4680EF1EE6EE65B7AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Marketable Securities and Investments Held at Cost [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" xlink:label="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_39A505302C735F4680EF1EE6EE65B7AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_39A505302C735F4680EF1EE6EE65B7AC" xlink:to="lab_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_39A505302C735F4680EF1EE6EE65B7AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_90824AA1103C08A244C9B0A03FC5B777_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_AA4F3B74B473582AB1DAAEA205A6177F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated net investment gain (loss) including portion attributable to noncontrolling interest [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_90824AA1103C08A244C9B0A03FC5B777_label_en-US" xlink:label="lab_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_AA4F3B74B473582AB1DAAEA205A6177F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_AA4F3B74B473582AB1DAAEA205A6177F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_AA4F3B74B473582AB1DAAEA205A6177F" xlink:to="lab_us-gaap_AccumulatedNetInvestmentGainLossIncludingPortionAttributableToNoncontrollingInterestMember_AA4F3B74B473582AB1DAAEA205A6177F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember_0B18CEB3AD92123EAD0CB0A03FC5DE66_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember_D5FE5326ADD75E49B053E34991F74807" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other-than-temporary impairments including portion attributable to noncontrolling interest [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember_0B18CEB3AD92123EAD0CB0A03FC5DE66_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember_D5FE5326ADD75E49B053E34991F74807" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other-than-Temporary Impairment Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember_D5FE5326ADD75E49B053E34991F74807" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember_D5FE5326ADD75E49B053E34991F74807" xlink:to="lab_us-gaap_AccumulatedOtherthanTemporaryImpairmentIncludingPortionAttributableToNoncontrollingInterestMember_D5FE5326ADD75E49B053E34991F74807" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_D5C21872E10264961966B0A03FC5E54D_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_80047CCB78175173BFC32515DB782C02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Axis]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_D5C21872E10264961966B0A03FC5E54D_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_80047CCB78175173BFC32515DB782C02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_80047CCB78175173BFC32515DB782C02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_80047CCB78175173BFC32515DB782C02" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_80047CCB78175173BFC32515DB782C02" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_31544BEE123F96BE74D1B0A03FC52DD0_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_F43C078B19065B55BB696E2EF4E08747" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Domain]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_31544BEE123F96BE74D1B0A03FC52DD0_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_F43C078B19065B55BB696E2EF4E08747" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_F43C078B19065B55BB696E2EF4E08747" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_F43C078B19065B55BB696E2EF4E08747" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_F43C078B19065B55BB696E2EF4E08747" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_F8ED0C7B50D1F8FECFA1B0A03FC501CA_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_9157964DE6185B8D954CA7B1CBD3ACD5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Member]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_F8ED0C7B50D1F8FECFA1B0A03FC501CA_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_9157964DE6185B8D954CA7B1CBD3ACD5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_9157964DE6185B8D954CA7B1CBD3ACD5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_9157964DE6185B8D954CA7B1CBD3ACD5" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_9157964DE6185B8D954CA7B1CBD3ACD5" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetirementPlanTypeAxis_B2318AB13B24A0501015B0A03FC5EDED_terseLabel_en-US" xlink:label="lab_us-gaap_RetirementPlanTypeAxis_550A1D17C2A2530182599DDE9B40F583" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retirement Plan Type [Axis]</link:label>
    <link:label id="lab_us-gaap_RetirementPlanTypeAxis_B2318AB13B24A0501015B0A03FC5EDED_label_en-US" xlink:label="lab_us-gaap_RetirementPlanTypeAxis_550A1D17C2A2530182599DDE9B40F583" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retirement Plan Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_550A1D17C2A2530182599DDE9B40F583" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_550A1D17C2A2530182599DDE9B40F583" xlink:to="lab_us-gaap_RetirementPlanTypeAxis_550A1D17C2A2530182599DDE9B40F583" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetirementPlanTypeDomain_27353145DC5F34D306E2B0A03FC55232_terseLabel_en-US" xlink:label="lab_us-gaap_RetirementPlanTypeDomain_A8B22C7FCB52514EB16F59F4D2347D09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retirement Plan Type [Domain]</link:label>
    <link:label id="lab_us-gaap_RetirementPlanTypeDomain_27353145DC5F34D306E2B0A03FC55232_label_en-US" xlink:label="lab_us-gaap_RetirementPlanTypeDomain_A8B22C7FCB52514EB16F59F4D2347D09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retirement Plan Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_A8B22C7FCB52514EB16F59F4D2347D09" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_A8B22C7FCB52514EB16F59F4D2347D09" xlink:to="lab_us-gaap_RetirementPlanTypeDomain_A8B22C7FCB52514EB16F59F4D2347D09" xlink:type="arc" />
    <link:label id="lab_us-gaap_PensionPlansDefinedBenefitMember_940F77F5F134324BBB64B0A03FC5EE7E_terseLabel_en-US" xlink:label="lab_us-gaap_PensionPlansDefinedBenefitMember_E584250876CC5AEDA6C1A83F1FD11873" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retirement Income Plan [Member]</link:label>
    <link:label id="lab_us-gaap_PensionPlansDefinedBenefitMember_940F77F5F134324BBB64B0A03FC5EE7E_label_en-US" xlink:label="lab_us-gaap_PensionPlansDefinedBenefitMember_E584250876CC5AEDA6C1A83F1FD11873" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_E584250876CC5AEDA6C1A83F1FD11873" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionPlansDefinedBenefitMember_E584250876CC5AEDA6C1A83F1FD11873" xlink:to="lab_us-gaap_PensionPlansDefinedBenefitMember_E584250876CC5AEDA6C1A83F1FD11873" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLosses_E5F6DDAF2E411D827CD3B0A03FC5D2A0_terseLabel_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLosses_54C4719028A45DA8825C1436E82D69F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Realized investment gains (losses)</link:label>
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLosses_E5F6DDAF2E411D827CD3B0A03FC5D2A0_label_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLosses_54C4719028A45DA8825C1436E82D69F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Investment Gains (Losses)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_54C4719028A45DA8825C1436E82D69F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedInvestmentGainsLosses_54C4719028A45DA8825C1436E82D69F7" xlink:to="lab_us-gaap_RealizedInvestmentGainsLosses_54C4719028A45DA8825C1436E82D69F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetInvestmentIncome_D02840DFCCE1D0A64779B0A03FC5002F_verboseLabel_en-US" xlink:label="lab_us-gaap_NetInvestmentIncome_4676D079BA2E531A9BEFA728DD07170A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net investment income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetInvestmentIncome" xlink:label="loc_us-gaap_NetInvestmentIncome_4676D079BA2E531A9BEFA728DD07170A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetInvestmentIncome_4676D079BA2E531A9BEFA728DD07170A" xlink:to="lab_us-gaap_NetInvestmentIncome_4676D079BA2E531A9BEFA728DD07170A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_02D1E59FC18B5899A890B0A03FC54466_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_D3E78BDC70C65E61B33F5AF22C7E13E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income before federal income tax</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_02D1E59FC18B5899A890B0A03FC54466_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_D3E78BDC70C65E61B33F5AF22C7E13E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_D3E78BDC70C65E61B33F5AF22C7E13E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_D3E78BDC70C65E61B33F5AF22C7E13E9" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_D3E78BDC70C65E61B33F5AF22C7E13E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_52BF6DF8BE05E716D470B0A03FC56473_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_D181CF3462385DA491CC7CDE4F0184A2" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_52BF6DF8BE05E716D470B0A03FC56473_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_D181CF3462385DA491CC7CDE4F0184A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_D181CF3462385DA491CC7CDE4F0184A2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_D181CF3462385DA491CC7CDE4F0184A2" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_D181CF3462385DA491CC7CDE4F0184A2" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_9B84EF60DF187C26F1E8B0A03FC5F80B_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_8721A54DB49B5AA9B3E9E4B6FCA61915" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_9B84EF60DF187C26F1E8B0A03FC5F80B_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_8721A54DB49B5AA9B3E9E4B6FCA61915" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8721A54DB49B5AA9B3E9E4B6FCA61915" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_8721A54DB49B5AA9B3E9E4B6FCA61915" xlink:to="lab_us-gaap_NetIncomeLoss_8721A54DB49B5AA9B3E9E4B6FCA61915" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_366F0CE8EDA88AF5ADB9B0A03FC583F8_terseLabel_en-US" xlink:label="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_387016B9278258209319CA98DBE4FCBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss and loss expense incurred</link:label>
    <link:label id="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_366F0CE8EDA88AF5ADB9B0A03FC583F8_label_en-US" xlink:label="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_387016B9278258209319CA98DBE4FCBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Policyholder Benefits and Claims Incurred, Net, Property, Casualty and Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncurredClaimsPropertyCasualtyAndLiability" xlink:label="loc_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_387016B9278258209319CA98DBE4FCBA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_387016B9278258209319CA98DBE4FCBA" xlink:to="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_387016B9278258209319CA98DBE4FCBA" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherUnderwritingExpense_A3BC2E792271113031F9B0A03FC52366_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherUnderwritingExpense_B2E27B69E82752688845A09B8D1F1DBC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Policy acquisition costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherUnderwritingExpense" xlink:label="loc_us-gaap_OtherUnderwritingExpense_B2E27B69E82752688845A09B8D1F1DBC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherUnderwritingExpense_B2E27B69E82752688845A09B8D1F1DBC" xlink:to="lab_us-gaap_OtherUnderwritingExpense_B2E27B69E82752688845A09B8D1F1DBC" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_0E7E7513C07715C18CCAB0A03FC51789_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_B4D7984977CE582682EFAA6C38BD5C7B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Total defined benefit pension and post-retirement plans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_B4D7984977CE582682EFAA6C38BD5C7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_B4D7984977CE582682EFAA6C38BD5C7B" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_B4D7984977CE582682EFAA6C38BD5C7B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtDisclosureAbstract_2DB56C240C5398D9F9C9101EE50890C5_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract_5FCEEC2A82E751CB804A572C28EC4DFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_5FCEEC2A82E751CB804A572C28EC4DFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureAbstract_5FCEEC2A82E751CB804A572C28EC4DFE" xlink:to="lab_us-gaap_DebtDisclosureAbstract_5FCEEC2A82E751CB804A572C28EC4DFE" xlink:type="arc" />
    <link:label id="lab_sigi_LineOfCreditConsolidatedNetWorthRequirement_AFB735453C61F18BE98A101EE5085C10_terseLabel_en-US" xlink:label="lab_sigi_LineOfCreditConsolidatedNetWorthRequirement_6EAB25D9B1AF59B6B6C37BF5794F128B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated net worth, required</link:label>
    <link:label id="lab_sigi_LineOfCreditConsolidatedNetWorthRequirement_AFB735453C61F18BE98A101EE5085C10_label_en-US" xlink:label="lab_sigi_LineOfCreditConsolidatedNetWorthRequirement_6EAB25D9B1AF59B6B6C37BF5794F128B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line Of Credit Consolidated Net Worth Requirement</link:label>
    <link:label id="lab_sigi_LineOfCreditConsolidatedNetWorthRequirement_AFB735453C61F18BE98A101EE5085C10_documentation_en-US" xlink:label="lab_sigi_LineOfCreditConsolidatedNetWorthRequirement_6EAB25D9B1AF59B6B6C37BF5794F128B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The covenant amount required for the line of credit for consolidated net worth as of the balance sheet date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LineOfCreditConsolidatedNetWorthRequirement" xlink:label="loc_sigi_LineOfCreditConsolidatedNetWorthRequirement_6EAB25D9B1AF59B6B6C37BF5794F128B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LineOfCreditConsolidatedNetWorthRequirement_6EAB25D9B1AF59B6B6C37BF5794F128B" xlink:to="lab_sigi_LineOfCreditConsolidatedNetWorthRequirement_6EAB25D9B1AF59B6B6C37BF5794F128B" xlink:type="arc" />
    <link:label id="lab_sigi_LineOfCreditStatutorySurplusRequirement_B06D2F1076D09BB5B9C7101EE5098B68_terseLabel_en-US" xlink:label="lab_sigi_LineOfCreditStatutorySurplusRequirement_6A321CA03F1B5456A909C31319EEE4E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory surplus, required</link:label>
    <link:label id="lab_sigi_LineOfCreditStatutorySurplusRequirement_B06D2F1076D09BB5B9C7101EE5098B68_label_en-US" xlink:label="lab_sigi_LineOfCreditStatutorySurplusRequirement_6A321CA03F1B5456A909C31319EEE4E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line Of Credit Statutory Surplus Requirement</link:label>
    <link:label id="lab_sigi_LineOfCreditStatutorySurplusRequirement_B06D2F1076D09BB5B9C7101EE5098B68_documentation_en-US" xlink:label="lab_sigi_LineOfCreditStatutorySurplusRequirement_6A321CA03F1B5456A909C31319EEE4E3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum covenant amount required for the line of credit for statutory surplus as of the balance sheet date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LineOfCreditStatutorySurplusRequirement" xlink:label="loc_sigi_LineOfCreditStatutorySurplusRequirement_6A321CA03F1B5456A909C31319EEE4E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LineOfCreditStatutorySurplusRequirement_6A321CA03F1B5456A909C31319EEE4E3" xlink:to="lab_sigi_LineOfCreditStatutorySurplusRequirement_6A321CA03F1B5456A909C31319EEE4E3" xlink:type="arc" />
    <link:label id="lab_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_F2AD6D586C2F5797C711101EE5099858_terseLabel_en-US" xlink:label="lab_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_D369852DCB7F5C2983DAEBF38F199DE9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt-to-capitalization ratio, required</link:label>
    <link:label id="lab_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_F2AD6D586C2F5797C711101EE5099858_label_en-US" xlink:label="lab_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_D369852DCB7F5C2983DAEBF38F199DE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line Of Credit Debt To Capitalization Ratio Requirement</link:label>
    <link:label id="lab_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_F2AD6D586C2F5797C711101EE5099858_documentation_en-US" xlink:label="lab_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_D369852DCB7F5C2983DAEBF38F199DE9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum covenant percentage required for the line of credit for the debt-to-capitalization ratio as of the balance sheet date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LineOfCreditDebtToCapitalizationRatioRequirement" xlink:label="loc_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_D369852DCB7F5C2983DAEBF38F199DE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_D369852DCB7F5C2983DAEBF38F199DE9" xlink:to="lab_sigi_LineOfCreditDebtToCapitalizationRatioRequirement_D369852DCB7F5C2983DAEBF38F199DE9" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_646990D3CAF273A45EAF101EE509CC93_verboseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_967295E4B9E252169D8D83D9113E0B62" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Consolidated net worth, actual</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_646990D3CAF273A45EAF101EE509CC93_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity_967295E4B9E252169D8D83D9113E0B62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_967295E4B9E252169D8D83D9113E0B62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_967295E4B9E252169D8D83D9113E0B62" xlink:to="lab_us-gaap_StockholdersEquity_967295E4B9E252169D8D83D9113E0B62" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_6B3FCF7ABA7F92CCD020101EE509D456_verboseLabel_en-US" xlink:label="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_3AE70CAEFC4B58D4A9304CEFCFC4012B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Statutory surplus, actual</link:label>
    <link:label id="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_6B3FCF7ABA7F92CCD020101EE509D456_label_en-US" xlink:label="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_3AE70CAEFC4B58D4A9304CEFCFC4012B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Accounting Practices, Statutory Capital and Surplus, Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_3AE70CAEFC4B58D4A9304CEFCFC4012B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_3AE70CAEFC4B58D4A9304CEFCFC4012B" xlink:to="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_3AE70CAEFC4B58D4A9304CEFCFC4012B" xlink:type="arc" />
    <link:label id="lab_sigi_DebtToCapitalizationRatio_5BEB65A7E4A14615AC48101EE509CDB4_terseLabel_en-US" xlink:label="lab_sigi_DebtToCapitalizationRatio_18C0F42739DE5ABBAB0B1E115A935FC1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt-to-capitalization ratio, actual</link:label>
    <link:label id="lab_sigi_DebtToCapitalizationRatio_5BEB65A7E4A14615AC48101EE509CDB4_label_en-US" xlink:label="lab_sigi_DebtToCapitalizationRatio_18C0F42739DE5ABBAB0B1E115A935FC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt To Capitalization Ratio</link:label>
    <link:label id="lab_sigi_DebtToCapitalizationRatio_5BEB65A7E4A14615AC48101EE509CDB4_documentation_en-US" xlink:label="lab_sigi_DebtToCapitalizationRatio_18C0F42739DE5ABBAB0B1E115A935FC1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the debt-to-capitalization ratio which is calculated by taking the entity's debt and dividing by the sum of the entity's debt and stockholders' equity as of the balance sheet date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DebtToCapitalizationRatio" xlink:label="loc_sigi_DebtToCapitalizationRatio_18C0F42739DE5ABBAB0B1E115A935FC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DebtToCapitalizationRatio_18C0F42739DE5ABBAB0B1E115A935FC1" xlink:to="lab_sigi_DebtToCapitalizationRatio_18C0F42739DE5ABBAB0B1E115A935FC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_1F0021CDFF4FDFA425578D287A236D24_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract_82F33D85989E5A44B9F0B647FEF35270" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_82F33D85989E5A44B9F0B647FEF35270" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_82F33D85989E5A44B9F0B647FEF35270" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract_82F33D85989E5A44B9F0B647FEF35270" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_228767474FF922F05EF58D287A23B67D_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7AA7288FAF085713A52819D8F96A7C24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_228767474FF922F05EF58D287A23B67D_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7AA7288FAF085713A52819D8F96A7C24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7AA7288FAF085713A52819D8F96A7C24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7AA7288FAF085713A52819D8F96A7C24" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_7AA7288FAF085713A52819D8F96A7C24" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E14540B4BFA8AD224428D287A23BA28_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_AB1BCA25C08659F7A3CECA3C5DEE0339" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Hierarchy [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E14540B4BFA8AD224428D287A23BA28_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_AB1BCA25C08659F7A3CECA3C5DEE0339" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Hierarchy [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_AB1BCA25C08659F7A3CECA3C5DEE0339" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_AB1BCA25C08659F7A3CECA3C5DEE0339" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_AB1BCA25C08659F7A3CECA3C5DEE0339" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_99CF07A56B328C5A35518D287A232974_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7AD2DFB2159B51D7900D8656B796AC68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Fair Value Hierarchy [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_99CF07A56B328C5A35518D287A232974_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7AD2DFB2159B51D7900D8656B796AC68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7AD2DFB2159B51D7900D8656B796AC68" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7AD2DFB2159B51D7900D8656B796AC68" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7AD2DFB2159B51D7900D8656B796AC68" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_62D9FF789462D12C6E298D287A23A8A0_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_953BC202DE895642A6A24943904ABD5C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_62D9FF789462D12C6E298D287A23A8A0_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_953BC202DE895642A6A24943904ABD5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_953BC202DE895642A6A24943904ABD5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member_953BC202DE895642A6A24943904ABD5C" xlink:to="lab_us-gaap_FairValueInputsLevel3Member_953BC202DE895642A6A24943904ABD5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByAssetClassAxis_6F88ACD750DAE6F5B9C18D287A23E904_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis_1D00F519C9745185AC9CCA9F7B6DE6C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value by Asset Class [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByAssetClassAxis_6F88ACD750DAE6F5B9C18D287A23E904_label_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis_1D00F519C9745185AC9CCA9F7B6DE6C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_1D00F519C9745185AC9CCA9F7B6DE6C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1D00F519C9745185AC9CCA9F7B6DE6C1" xlink:to="lab_us-gaap_FairValueByAssetClassAxis_1D00F519C9745185AC9CCA9F7B6DE6C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_570996DA96E995433BB88D287A238A14_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_04F5C6D380AC5EAEA2C3631826881E0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, by Asset Class [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_570996DA96E995433BB88D287A238A14_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_04F5C6D380AC5EAEA2C3631826881E0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Class [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_04F5C6D380AC5EAEA2C3631826881E0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_04F5C6D380AC5EAEA2C3631826881E0A" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_04F5C6D380AC5EAEA2C3631826881E0A" xlink:type="arc" />
    <link:label id="lab_sigi_AfsFixedMaturitySecuritiesMember_CBDF31451C52680322778D287A23B4E8_verboseLabel_en-US" xlink:label="lab_sigi_AfsFixedMaturitySecuritiesMember_ED7D1AC2A9B05184A41E2377B1CBC093" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">AFS Fixed Income Securities [Member]</link:label>
    <link:label id="lab_sigi_AfsFixedMaturitySecuritiesMember_CBDF31451C52680322778D287A23B4E8_label_en-US" xlink:label="lab_sigi_AfsFixedMaturitySecuritiesMember_ED7D1AC2A9B05184A41E2377B1CBC093" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Afs Fixed Maturity Securities [Member]</link:label>
    <link:label id="lab_sigi_AfsFixedMaturitySecuritiesMember_CBDF31451C52680322778D287A23B4E8_documentation_en-US" xlink:label="lab_sigi_AfsFixedMaturitySecuritiesMember_ED7D1AC2A9B05184A41E2377B1CBC093" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total of debt securities categorized neither as held-to-maturity nor trading.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AfsFixedMaturitySecuritiesMember" xlink:label="loc_sigi_AfsFixedMaturitySecuritiesMember_ED7D1AC2A9B05184A41E2377B1CBC093" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AfsFixedMaturitySecuritiesMember_ED7D1AC2A9B05184A41E2377B1CBC093" xlink:to="lab_sigi_AfsFixedMaturitySecuritiesMember_ED7D1AC2A9B05184A41E2377B1CBC093" xlink:type="arc" />
    <link:label id="lab_us-gaap_USTreasuryAndGovernmentMember_D3B0CA78C2073BA8679A8D287A234CB3_terseLabel_en-US" xlink:label="lab_us-gaap_USTreasuryAndGovernmentMember_E8EF0974FDC65312B6CFF2CA294914DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Government and Government Agencies [Member]</link:label>
    <link:label id="lab_us-gaap_USTreasuryAndGovernmentMember_D3B0CA78C2073BA8679A8D287A234CB3_label_en-US" xlink:label="lab_us-gaap_USTreasuryAndGovernmentMember_E8EF0974FDC65312B6CFF2CA294914DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Treasury and Government [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_E8EF0974FDC65312B6CFF2CA294914DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USTreasuryAndGovernmentMember_E8EF0974FDC65312B6CFF2CA294914DC" xlink:to="lab_us-gaap_USTreasuryAndGovernmentMember_E8EF0974FDC65312B6CFF2CA294914DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_CorporateDebtSecuritiesMember_0B4BB9587A9C738E6BF18D287A233E6F_terseLabel_en-US" xlink:label="lab_us-gaap_CorporateDebtSecuritiesMember_9941CCA883415B728F6AB2BE808FE1B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate Securities [Member]</link:label>
    <link:label id="lab_us-gaap_CorporateDebtSecuritiesMember_0B4BB9587A9C738E6BF18D287A233E6F_label_en-US" xlink:label="lab_us-gaap_CorporateDebtSecuritiesMember_9941CCA883415B728F6AB2BE808FE1B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Corporate Debt Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_9941CCA883415B728F6AB2BE808FE1B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CorporateDebtSecuritiesMember_9941CCA883415B728F6AB2BE808FE1B8" xlink:to="lab_us-gaap_CorporateDebtSecuritiesMember_9941CCA883415B728F6AB2BE808FE1B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetBackedSecuritiesMember_CC9D070FACB2E285239C8D287A23976A_terseLabel_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesMember_21E7E5808A5A5371A71C01A6EEE2D528" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collateralized Loan Obligations and Other Asset-Backed Securities [Member]</link:label>
    <link:label id="lab_us-gaap_AssetBackedSecuritiesMember_CC9D070FACB2E285239C8D287A23976A_label_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesMember_21E7E5808A5A5371A71C01A6EEE2D528" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset-backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_21E7E5808A5A5371A71C01A6EEE2D528" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetBackedSecuritiesMember_21E7E5808A5A5371A71C01A6EEE2D528" xlink:to="lab_us-gaap_AssetBackedSecuritiesMember_21E7E5808A5A5371A71C01A6EEE2D528" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_D22F5C3CB1999CAC6B718D287A236A6A_verboseLabel_en-US" xlink:label="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_73B569E2EDB557969A22422EF5E85E2B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Commercial Mortgage-backed Securities (CMBS) [Member]</link:label>
    <link:label id="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_D22F5C3CB1999CAC6B718D287A236A6A_label_en-US" xlink:label="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_73B569E2EDB557969A22422EF5E85E2B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Mortgage Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_73B569E2EDB557969A22422EF5E85E2B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_73B569E2EDB557969A22422EF5E85E2B" xlink:to="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_73B569E2EDB557969A22422EF5E85E2B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_5E08638F5F2980E096828D287A235379_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1C0AFB266E12579197DE082331AB74D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_5E08638F5F2980E096828D287A235379_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1C0AFB266E12579197DE082331AB74D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1C0AFB266E12579197DE082331AB74D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1C0AFB266E12579197DE082331AB74D2" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_1C0AFB266E12579197DE082331AB74D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_C09B517DF1526477570B8D287A2342BF_periodStartLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_7A68FE7D15BD54B882D643E704B515E9" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Beginning Balance</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_C09B517DF1526477570B8D287A2342BF_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_7A68FE7D15BD54B882D643E704B515E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_7A68FE7D15BD54B882D643E704B515E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_7A68FE7D15BD54B882D643E704B515E9" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_7A68FE7D15BD54B882D643E704B515E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_680D53334A239E892FC18D287A23823F_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_0694584AA8DE5E78A13C2E7E8BA00FFE" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Total net (losses) gains for the period included in OCI</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_680D53334A239E892FC18D287A23823F_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_0694584AA8DE5E78A13C2E7E8BA00FFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_0694584AA8DE5E78A13C2E7E8BA00FFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_0694584AA8DE5E78A13C2E7E8BA00FFE" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_0694584AA8DE5E78A13C2E7E8BA00FFE" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C4825DBD195CA2A2104F8D287A23BA38_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_A96693D0B51F5A819C4214DA2B98BB34" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Total net (losses) gains for the period included in net income</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C4825DBD195CA2A2104F8D287A23BA38_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_A96693D0B51F5A819C4214DA2B98BB34" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_A96693D0B51F5A819C4214DA2B98BB34" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_A96693D0B51F5A819C4214DA2B98BB34" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_A96693D0B51F5A819C4214DA2B98BB34" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_B283ADABC9DB8A2CF9918D287A23791E_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_641717FFC9C252CD9888487E2CEA7F88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_B283ADABC9DB8A2CF9918D287A23791E_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_641717FFC9C252CD9888487E2CEA7F88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_641717FFC9C252CD9888487E2CEA7F88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_641717FFC9C252CD9888487E2CEA7F88" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_641717FFC9C252CD9888487E2CEA7F88" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_9B9A5900B38A0459CB448D287A235F69_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_7866114486DA5A898200F02B2507F805" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sales</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_9B9A5900B38A0459CB448D287A235F69_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_7866114486DA5A898200F02B2507F805" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_7866114486DA5A898200F02B2507F805" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_7866114486DA5A898200F02B2507F805" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_7866114486DA5A898200F02B2507F805" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_852B77F35BCEE20D06638D287A231723_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_64152D136D86558596D1F38517785F9F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuances</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_852B77F35BCEE20D06638D287A231723_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_64152D136D86558596D1F38517785F9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_64152D136D86558596D1F38517785F9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_64152D136D86558596D1F38517785F9F" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues_64152D136D86558596D1F38517785F9F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_2F425FB265543948A3268D287A23778F_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_F6EC11FAF3AB53A282B77024D5A5F2AB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Settlements</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_2F425FB265543948A3268D287A23778F_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_F6EC11FAF3AB53A282B77024D5A5F2AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_F6EC11FAF3AB53A282B77024D5A5F2AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_F6EC11FAF3AB53A282B77024D5A5F2AB" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_F6EC11FAF3AB53A282B77024D5A5F2AB" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_2FED818EBBBB37EF5AD68D287A23B9E2_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_F480809F016B5390A55F4282951CCCC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transfers into Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_2FED818EBBBB37EF5AD68D287A23B9E2_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_F480809F016B5390A55F4282951CCCC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_F480809F016B5390A55F4282951CCCC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_F480809F016B5390A55F4282951CCCC7" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_F480809F016B5390A55F4282951CCCC7" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_680B75A3013C0583C89C8D287A23C004_negatedLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_3201AB127DA75B8F9EF04444151ADFF0" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Transfers out of Level 3</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_680B75A3013C0583C89C8D287A23C004_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_3201AB127DA75B8F9EF04444151ADFF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_3201AB127DA75B8F9EF04444151ADFF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_3201AB127DA75B8F9EF04444151ADFF0" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_3201AB127DA75B8F9EF04444151ADFF0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_1D0B604A1F9AFBA920A98D287A23EDDB_periodEndLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_A09E2623321C503EB561E12C01F308F4" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Ending Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_A09E2623321C503EB561E12C01F308F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_A09E2623321C503EB561E12C01F308F4" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_A09E2623321C503EB561E12C01F308F4" xlink:type="arc" />
    <link:label id="lab_sigi_AvailableForSaleSecuritiesScheduleTable_436E4CCBB9667DE293CEA02D42C44996_terseLabel_en-US" xlink:label="lab_sigi_AvailableForSaleSecuritiesScheduleTable_5359E315073754E2B304F46D1F94223A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Available-for-sale Securities [Table]</link:label>
    <link:label id="lab_sigi_AvailableForSaleSecuritiesScheduleTable_436E4CCBB9667DE293CEA02D42C44996_label_en-US" xlink:label="lab_sigi_AvailableForSaleSecuritiesScheduleTable_5359E315073754E2B304F46D1F94223A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available For Sale Securities Schedule [Table]</link:label>
    <link:label id="lab_sigi_AvailableForSaleSecuritiesScheduleTable_436E4CCBB9667DE293CEA02D42C44996_documentation_en-US" xlink:label="lab_sigi_AvailableForSaleSecuritiesScheduleTable_5359E315073754E2B304F46D1F94223A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of the reconciliation of available-for-sale securities from cost basis to fair value</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AvailableForSaleSecuritiesScheduleTable" xlink:label="loc_sigi_AvailableForSaleSecuritiesScheduleTable_5359E315073754E2B304F46D1F94223A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AvailableForSaleSecuritiesScheduleTable_5359E315073754E2B304F46D1F94223A" xlink:to="lab_sigi_AvailableForSaleSecuritiesScheduleTable_5359E315073754E2B304F46D1F94223A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis_C4CE5B9FFA178F97AFF2A02D42C5AAF7_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis_3CFD326526A852009619AF77B5EB4688" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Branch [Axis]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis_C4CE5B9FFA178F97AFF2A02D42C5AAF7_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis_3CFD326526A852009619AF77B5EB4688" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Branch [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis_3CFD326526A852009619AF77B5EB4688" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis_3CFD326526A852009619AF77B5EB4688" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis_3CFD326526A852009619AF77B5EB4688" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain_F64CEC655B4B4BBCB876A02D42C5485D_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain_BE9072A3215255A8A120CF8C63F01173" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Branch [Domain]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain_F64CEC655B4B4BBCB876A02D42C5485D_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain_BE9072A3215255A8A120CF8C63F01173" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Branch [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain_BE9072A3215255A8A120CF8C63F01173" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain_BE9072A3215255A8A120CF8C63F01173" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankStateDomain_BE9072A3215255A8A120CF8C63F01173" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankOfNewYorkMember_F911938A0354CB103212A02D42C5A639_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankOfNewYorkMember_491AB07C1AF2550486FA81657A1675D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank of New York [Member]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankOfNewYorkMember_F911938A0354CB103212A02D42C5A639_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankOfNewYorkMember_491AB07C1AF2550486FA81657A1675D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank of New York [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankOfNewYorkMember" xlink:label="loc_us-gaap_FederalHomeLoanBankOfNewYorkMember_491AB07C1AF2550486FA81657A1675D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankOfNewYorkMember_491AB07C1AF2550486FA81657A1675D8" xlink:to="lab_us-gaap_FederalHomeLoanBankOfNewYorkMember_491AB07C1AF2550486FA81657A1675D8" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankOfIndianapolisMember_1DFA325F18D43609D071A02D42C5A4B3_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankOfIndianapolisMember_EFF1D85C9B2B55E590FAD41BFD5EDC32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank of Indianapolis [Member]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankOfIndianapolisMember_1DFA325F18D43609D071A02D42C5A4B3_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankOfIndianapolisMember_EFF1D85C9B2B55E590FAD41BFD5EDC32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank of Indianapolis [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankOfIndianapolisMember" xlink:label="loc_us-gaap_FederalHomeLoanBankOfIndianapolisMember_EFF1D85C9B2B55E590FAD41BFD5EDC32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankOfIndianapolisMember_EFF1D85C9B2B55E590FAD41BFD5EDC32" xlink:to="lab_us-gaap_FederalHomeLoanBankOfIndianapolisMember_EFF1D85C9B2B55E590FAD41BFD5EDC32" xlink:type="arc" />
    <link:label id="lab_invest_InvestmentSectorAxis_05B3ADD654C20ED8E5C0A02D42C5DB4F_terseLabel_en-US" xlink:label="lab_invest_InvestmentSectorAxis_5B05F2FD553C58B8980895A11D98A296" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Sector [Axis]</link:label>
    <link:label id="lab_invest_InvestmentSectorAxis_05B3ADD654C20ED8E5C0A02D42C5DB4F_label_en-US" xlink:label="lab_invest_InvestmentSectorAxis_5B05F2FD553C58B8980895A11D98A296" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Sector [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSectorAxis" xlink:label="loc_invest_InvestmentSectorAxis_5B05F2FD553C58B8980895A11D98A296" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSectorAxis_5B05F2FD553C58B8980895A11D98A296" xlink:to="lab_invest_InvestmentSectorAxis_5B05F2FD553C58B8980895A11D98A296" xlink:type="arc" />
    <link:label id="lab_invest_InvestmentSectorDomain_6BFEC9A82F7880EAE416A02D42C5D095_terseLabel_en-US" xlink:label="lab_invest_InvestmentSectorDomain_C27723B4496858B79C92003DCE3EF28F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Sector [Domain]</link:label>
    <link:label id="lab_invest_InvestmentSectorDomain_6BFEC9A82F7880EAE416A02D42C5D095_label_en-US" xlink:label="lab_invest_InvestmentSectorDomain_C27723B4496858B79C92003DCE3EF28F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Sector [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSectorDomain" xlink:label="loc_invest_InvestmentSectorDomain_C27723B4496858B79C92003DCE3EF28F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSectorDomain_C27723B4496858B79C92003DCE3EF28F" xlink:to="lab_invest_InvestmentSectorDomain_C27723B4496858B79C92003DCE3EF28F" xlink:type="arc" />
    <link:label id="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_0E48ADCC8AE00E586691A02D42C5B637_terseLabel_en-US" xlink:label="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_662F0F32F2ED58AABFA6F08D4C2B04F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Obligations of States and Political Subdivisions [Member]</link:label>
    <link:label id="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_0E48ADCC8AE00E586691A02D42C5B637_label_en-US" xlink:label="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_662F0F32F2ED58AABFA6F08D4C2B04F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US States and Political Subdivisions Debt Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_662F0F32F2ED58AABFA6F08D4C2B04F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_662F0F32F2ED58AABFA6F08D4C2B04F3" xlink:to="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_662F0F32F2ED58AABFA6F08D4C2B04F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_A89335535C06FFE5E708A02D42C65FD5_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_FB8EDDC03C4C579D975265B2C9EE0055" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial Mortgage Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_FB8EDDC03C4C579D975265B2C9EE0055" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_FB8EDDC03C4C579D975265B2C9EE0055" xlink:to="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_FB8EDDC03C4C579D975265B2C9EE0055" xlink:type="arc" />
    <link:label id="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_F7A28D7B2D9B5F26E4B5A02D42C6C787_terseLabel_en-US" xlink:label="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_320725B56C2B5F91BBBDD225C129C6CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential Mortgage Backed Securities [Member]</link:label>
    <link:label id="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_F7A28D7B2D9B5F26E4B5A02D42C6C787_label_en-US" xlink:label="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_320725B56C2B5F91BBBDD225C129C6CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_320725B56C2B5F91BBBDD225C129C6CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_320725B56C2B5F91BBBDD225C129C6CD" xlink:to="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_320725B56C2B5F91BBBDD225C129C6CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_1FE58EA87DD03777FBA6A02D42C66AB6_terseLabel_en-US" xlink:label="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_29D7BEB407FF5FCD9B9E51F228D0BB8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Major Types of Debt and Equity Securities [Axis]</link:label>
    <link:label id="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_1FE58EA87DD03777FBA6A02D42C66AB6_label_en-US" xlink:label="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_29D7BEB407FF5FCD9B9E51F228D0BB8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Major Types of Debt and Equity Securities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_29D7BEB407FF5FCD9B9E51F228D0BB8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_29D7BEB407FF5FCD9B9E51F228D0BB8B" xlink:to="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis_29D7BEB407FF5FCD9B9E51F228D0BB8B" xlink:type="arc" />
    <link:label id="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_7272FF8379E09228CB0AA02D42C68E07_terseLabel_en-US" xlink:label="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_CA72B9E968C85FE8808A5C72590F0EB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Major Types of Debt and Equity Securities [Domain]</link:label>
    <link:label id="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_7272FF8379E09228CB0AA02D42C68E07_label_en-US" xlink:label="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_CA72B9E968C85FE8808A5C72590F0EB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Major Types of Debt and Equity Securities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain" xlink:label="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_CA72B9E968C85FE8808A5C72590F0EB6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_CA72B9E968C85FE8808A5C72590F0EB6" xlink:to="lab_us-gaap_MajorTypesOfDebtAndEquitySecuritiesDomain_CA72B9E968C85FE8808A5C72590F0EB6" xlink:type="arc" />
    <link:label id="lab_us-gaap_FixedMaturitiesMember_2C0C6CFDE00A46C9C528A02D42C6766E_verboseLabel_en-US" xlink:label="lab_us-gaap_FixedMaturitiesMember_B6496A46B20357AF9FFEA2594887A72D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fixed Income [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FixedMaturitiesMember" xlink:label="loc_us-gaap_FixedMaturitiesMember_B6496A46B20357AF9FFEA2594887A72D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FixedMaturitiesMember_B6496A46B20357AF9FFEA2594887A72D" xlink:to="lab_us-gaap_FixedMaturitiesMember_B6496A46B20357AF9FFEA2594887A72D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_DDEC4C770B7E10EE2E9CA02D42C6AF28_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8431DB808CC65EDFB47365F2EB8A6F62" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Available-for-sale Securities [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_DDEC4C770B7E10EE2E9CA02D42C6AF28_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8431DB808CC65EDFB47365F2EB8A6F62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Available-for-sale Securities [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8431DB808CC65EDFB47365F2EB8A6F62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8431DB808CC65EDFB47365F2EB8A6F62" xlink:to="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_8431DB808CC65EDFB47365F2EB8A6F62" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_B0622969A943D0A19927A02D42C6A379_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_DF7FD7B1D9885B4EA198EA20B29FB1FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_B0622969A943D0A19927A02D42C6A379_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_DF7FD7B1D9885B4EA198EA20B29FB1FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_DF7FD7B1D9885B4EA198EA20B29FB1FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_DF7FD7B1D9885B4EA198EA20B29FB1FC" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_DF7FD7B1D9885B4EA198EA20B29FB1FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsHeldByInsuranceRegulators_F6F37E09ED1B5E2DB885A02D42C68B66_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsHeldByInsuranceRegulators_C7D347FF51DD54929D8D4CF8E5B7CF8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Held by Insurance Regulators</link:label>
    <link:label id="lab_us-gaap_AssetsHeldByInsuranceRegulators_F6F37E09ED1B5E2DB885A02D42C68B66_label_en-US" xlink:label="lab_us-gaap_AssetsHeldByInsuranceRegulators_C7D347FF51DD54929D8D4CF8E5B7CF8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Held by Insurance Regulators</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsHeldByInsuranceRegulators" xlink:label="loc_us-gaap_AssetsHeldByInsuranceRegulators_C7D347FF51DD54929D8D4CF8E5B7CF8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsHeldByInsuranceRegulators_C7D347FF51DD54929D8D4CF8E5B7CF8C" xlink:to="lab_us-gaap_AssetsHeldByInsuranceRegulators_C7D347FF51DD54929D8D4CF8E5B7CF8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue_D5DF6F5FC332D1578B76A02D42C7E9FD_terseLabel_en-US" xlink:label="lab_us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue_C9DAA4527F565D0880CD8AE6DBDBBE43" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities pledged as collateral for reinsurance obligations</link:label>
    <link:label id="lab_us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue_D5DF6F5FC332D1578B76A02D42C7E9FD_label_en-US" xlink:label="lab_us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue_C9DAA4527F565D0880CD8AE6DBDBBE43" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Security Owned and Pledged as Collateral, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue" xlink:label="loc_us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue_C9DAA4527F565D0880CD8AE6DBDBBE43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue_C9DAA4527F565D0880CD8AE6DBDBBE43" xlink:to="lab_us-gaap_SecurityOwnedAndPledgedAsCollateralFairValue_C9DAA4527F565D0880CD8AE6DBDBBE43" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_B12B7E78A19BDA78CC4A9ABDE1986B3E_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_631B50016B62564C955C0DFDEC123ED7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_B12B7E78A19BDA78CC4A9ABDE1986B3E_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_631B50016B62564C955C0DFDEC123ED7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_631B50016B62564C955C0DFDEC123ED7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_631B50016B62564C955C0DFDEC123ED7" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_631B50016B62564C955C0DFDEC123ED7" xlink:type="arc" />
    <link:label id="lab_sigi_LineOfBusinessBySegmentAxis_832288F5043A52DCFF069ABDE1983898_terseLabel_en-US" xlink:label="lab_sigi_LineOfBusinessBySegmentAxis_310046877DF253F2821B4339A37B253B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line Of Business By Segment [Axis]</link:label>
    <link:label id="lab_sigi_LineOfBusinessBySegmentAxis_832288F5043A52DCFF069ABDE1983898_label_en-US" xlink:label="lab_sigi_LineOfBusinessBySegmentAxis_310046877DF253F2821B4339A37B253B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line Of Business By Segment [Axis]</link:label>
    <link:label id="lab_sigi_LineOfBusinessBySegmentAxis_832288F5043A52DCFF069ABDE1983898_documentation_en-US" xlink:label="lab_sigi_LineOfBusinessBySegmentAxis_310046877DF253F2821B4339A37B253B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Information by line of business segments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LineOfBusinessBySegmentAxis" xlink:label="loc_sigi_LineOfBusinessBySegmentAxis_310046877DF253F2821B4339A37B253B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LineOfBusinessBySegmentAxis_310046877DF253F2821B4339A37B253B" xlink:to="lab_sigi_LineOfBusinessBySegmentAxis_310046877DF253F2821B4339A37B253B" xlink:type="arc" />
    <link:label id="lab_sigi_LineOfBusinessBySegmentDomain_2E95DED167A60C6145FD9ABDE1989F2B_terseLabel_en-US" xlink:label="lab_sigi_LineOfBusinessBySegmentDomain_7C7B9F8504C1511FBF05E2F68839AE62" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line Of Business By Segment [Domain]</link:label>
    <link:label id="lab_sigi_LineOfBusinessBySegmentDomain_2E95DED167A60C6145FD9ABDE1989F2B_label_en-US" xlink:label="lab_sigi_LineOfBusinessBySegmentDomain_7C7B9F8504C1511FBF05E2F68839AE62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line Of Business By Segment [Domain]</link:label>
    <link:label id="lab_sigi_LineOfBusinessBySegmentDomain_2E95DED167A60C6145FD9ABDE1989F2B_documentation_en-US" xlink:label="lab_sigi_LineOfBusinessBySegmentDomain_7C7B9F8504C1511FBF05E2F68839AE62" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for Information by line of business segments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LineOfBusinessBySegmentDomain" xlink:label="loc_sigi_LineOfBusinessBySegmentDomain_7C7B9F8504C1511FBF05E2F68839AE62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LineOfBusinessBySegmentDomain_7C7B9F8504C1511FBF05E2F68839AE62" xlink:to="lab_sigi_LineOfBusinessBySegmentDomain_7C7B9F8504C1511FBF05E2F68839AE62" xlink:type="arc" />
    <link:label id="lab_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_874359FC18E4C90B86DE9ABDE1998FD1_terseLabel_en-US" xlink:label="lab_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_5AF8F6C4093E5E48B087FDB13F6817ED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underwriting gain (loss), before federal income tax</link:label>
    <link:label id="lab_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_874359FC18E4C90B86DE9ABDE1998FD1_label_en-US" xlink:label="lab_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_5AF8F6C4093E5E48B087FDB13F6817ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Underwriting Income Loss Before Federal Income Taxes</link:label>
    <link:label id="lab_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_874359FC18E4C90B86DE9ABDE1998FD1_documentation_en-US" xlink:label="lab_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_5AF8F6C4093E5E48B087FDB13F6817ED" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net premiums earned and other insurance income less net loss and loss expenses incurred, loss adjustment expenses, policy acquisition costs and other underwriting expenses.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes" xlink:label="loc_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_5AF8F6C4093E5E48B087FDB13F6817ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_5AF8F6C4093E5E48B087FDB13F6817ED" xlink:to="lab_sigi_UnderwritingIncomeLossBeforeFederalIncomeTaxes_5AF8F6C4093E5E48B087FDB13F6817ED" xlink:type="arc" />
    <link:label id="lab_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_78B8D77BEFB7A546552D9ABDE1996FEB_terseLabel_en-US" xlink:label="lab_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_BF09CB6DCB9E5F0DA79AF2A74736548C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Underwriting gain (loss), after federal income tax</link:label>
    <link:label id="lab_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_78B8D77BEFB7A546552D9ABDE1996FEB_label_en-US" xlink:label="lab_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_BF09CB6DCB9E5F0DA79AF2A74736548C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Underwriting Income Loss After Federal Income Taxes</link:label>
    <link:label id="lab_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_78B8D77BEFB7A546552D9ABDE1996FEB_documentation_en-US" xlink:label="lab_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_BF09CB6DCB9E5F0DA79AF2A74736548C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">After-tax amount of net premiums earned and other insurance income less net loss and loss expenses incurred, loss adjustment expenses, policy acquisition costs and other underwriting expenses.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes" xlink:label="loc_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_BF09CB6DCB9E5F0DA79AF2A74736548C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_BF09CB6DCB9E5F0DA79AF2A74736548C" xlink:to="lab_sigi_UnderwritingIncomeLossAfterFederalIncomeTaxes_BF09CB6DCB9E5F0DA79AF2A74736548C" xlink:type="arc" />
    <link:label id="lab_us-gaap_CombinedRatio_2AD0E9C1D3761254E5729ABDE199FF9B_terseLabel_en-US" xlink:label="lab_us-gaap_CombinedRatio_28F056E08A9E5E9EA36A7003683ECD3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Combined Ratio</link:label>
    <link:label id="lab_us-gaap_CombinedRatio_2AD0E9C1D3761254E5729ABDE199FF9B_label_en-US" xlink:label="lab_us-gaap_CombinedRatio_28F056E08A9E5E9EA36A7003683ECD3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Combined Ratio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CombinedRatio" xlink:label="loc_us-gaap_CombinedRatio_28F056E08A9E5E9EA36A7003683ECD3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CombinedRatio_28F056E08A9E5E9EA36A7003683ECD3E" xlink:to="lab_us-gaap_CombinedRatio_28F056E08A9E5E9EA36A7003683ECD3E" xlink:type="arc" />
    <link:label id="lab_sigi_TotalInvestmentRevenues_6533B7AC9C9F6A8069B29ABDE19912FF_totalLabel_en-US" xlink:label="lab_sigi_TotalInvestmentRevenues_A5651F61FF1B5426AF48C9E0C27C5E8F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total investment revenues</link:label>
    <link:label id="lab_sigi_TotalInvestmentRevenues_6533B7AC9C9F6A8069B29ABDE19912FF_label_en-US" xlink:label="lab_sigi_TotalInvestmentRevenues_A5651F61FF1B5426AF48C9E0C27C5E8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Investment Revenues</link:label>
    <link:label id="lab_sigi_TotalInvestmentRevenues_6533B7AC9C9F6A8069B29ABDE19912FF_documentation_en-US" xlink:label="lab_sigi_TotalInvestmentRevenues_A5651F61FF1B5426AF48C9E0C27C5E8F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The income earned from investments in securities and other investments including dividends, interest, and returns on other investments, including realized gains/losses.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalInvestmentRevenues" xlink:label="loc_sigi_TotalInvestmentRevenues_A5651F61FF1B5426AF48C9E0C27C5E8F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalInvestmentRevenues_A5651F61FF1B5426AF48C9E0C27C5E8F" xlink:to="lab_sigi_TotalInvestmentRevenues_A5651F61FF1B5426AF48C9E0C27C5E8F" xlink:type="arc" />
    <link:label id="lab_sigi_Taxoninvestmentincome_76814B5DE8DE5BF4DDB39ABDE199B3D5_terseLabel_en-US" xlink:label="lab_sigi_Taxoninvestmentincome_A596B75D8A115C67AA53F5288F12060E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax on investment income</link:label>
    <link:label id="lab_sigi_Taxoninvestmentincome_76814B5DE8DE5BF4DDB39ABDE199B3D5_label_en-US" xlink:label="lab_sigi_Taxoninvestmentincome_A596B75D8A115C67AA53F5288F12060E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax on investment income</link:label>
    <link:label id="lab_sigi_Taxoninvestmentincome_76814B5DE8DE5BF4DDB39ABDE199B3D5_documentation_en-US" xlink:label="lab_sigi_Taxoninvestmentincome_A596B75D8A115C67AA53F5288F12060E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Taxes incurred on investment income</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_Taxoninvestmentincome" xlink:label="loc_sigi_Taxoninvestmentincome_A596B75D8A115C67AA53F5288F12060E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_Taxoninvestmentincome_A596B75D8A115C67AA53F5288F12060E" xlink:to="lab_sigi_Taxoninvestmentincome_A596B75D8A115C67AA53F5288F12060E" xlink:type="arc" />
    <link:label id="lab_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_4BACA29118C5E096F12E9ABDE199E922_totalLabel_en-US" xlink:label="lab_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_CA85288C8DBE5F278B6B92BC1FBF95C6" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total investment income, after federal income tax</link:label>
    <link:label id="lab_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_4BACA29118C5E096F12E9ABDE199E922_label_en-US" xlink:label="lab_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_CA85288C8DBE5F278B6B92BC1FBF95C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Investment Income After Federal Income Tax</link:label>
    <link:label id="lab_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_4BACA29118C5E096F12E9ABDE199E922_documentation_en-US" xlink:label="lab_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_CA85288C8DBE5F278B6B92BC1FBF95C6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The income earned from investments in securities and other investments including dividends, interest, and returns on other investments, including realized gains/losses, after-tax</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalInvestmentIncomeAfterFederalIncomeTax" xlink:label="loc_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_CA85288C8DBE5F278B6B92BC1FBF95C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_CA85288C8DBE5F278B6B92BC1FBF95C6" xlink:to="lab_sigi_TotalInvestmentIncomeAfterFederalIncomeTax_CA85288C8DBE5F278B6B92BC1FBF95C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementAbstract_FDE07019231A25E99327A04F7498A3F7_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract_4F51785B3076598C8DCF3DE0B75F5006" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_4F51785B3076598C8DCF3DE0B75F5006" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract_4F51785B3076598C8DCF3DE0B75F5006" xlink:to="lab_us-gaap_IncomeStatementAbstract_4F51785B3076598C8DCF3DE0B75F5006" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenuesAbstract_676826A22603CF357E51A04F749843D8_terseLabel_en-US" xlink:label="lab_us-gaap_RevenuesAbstract_C61BAE8C5E1B56A1BE900D0627E08DF9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenues:</link:label>
    <link:label id="lab_us-gaap_RevenuesAbstract_676826A22603CF357E51A04F749843D8_label_en-US" xlink:label="lab_us-gaap_RevenuesAbstract_C61BAE8C5E1B56A1BE900D0627E08DF9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_C61BAE8C5E1B56A1BE900D0627E08DF9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenuesAbstract_C61BAE8C5E1B56A1BE900D0627E08DF9" xlink:to="lab_us-gaap_RevenuesAbstract_C61BAE8C5E1B56A1BE900D0627E08DF9" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_76DABC6672F81298AFEEA04F74984D8E_terseLabel_en-US" xlink:label="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_6E72C2BAC64051919218768B1247DBEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net premiums earned</link:label>
    <link:label id="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_76DABC6672F81298AFEEA04F74984D8E_label_en-US" xlink:label="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_6E72C2BAC64051919218768B1247DBEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums Earned, Net, Property and Casualty</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsEarnedNetPropertyAndCasualty" xlink:label="loc_us-gaap_PremiumsEarnedNetPropertyAndCasualty_6E72C2BAC64051919218768B1247DBEA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsEarnedNetPropertyAndCasualty_6E72C2BAC64051919218768B1247DBEA" xlink:to="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_6E72C2BAC64051919218768B1247DBEA" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLossesAbstract_E3C5ADFA7E867E5AC7A2A04F7498D22A_terseLabel_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLossesAbstract_1FB6AEB5FF5F5A338100357941AF3AE2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains (losses):</link:label>
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLossesAbstract_E3C5ADFA7E867E5AC7A2A04F7498D22A_label_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLossesAbstract_1FB6AEB5FF5F5A338100357941AF3AE2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Investment Gains (Losses) [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:label="loc_us-gaap_RealizedInvestmentGainsLossesAbstract_1FB6AEB5FF5F5A338100357941AF3AE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedInvestmentGainsLossesAbstract_1FB6AEB5FF5F5A338100357941AF3AE2" xlink:to="lab_us-gaap_RealizedInvestmentGainsLossesAbstract_1FB6AEB5FF5F5A338100357941AF3AE2" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_C0E0AD6DFB18950A354CA04F7499693E_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_6E7C75BAF2A25A829AAEE23CD583ACE0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized investment gains</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_C0E0AD6DFB18950A354CA04F7499693E_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_6E7C75BAF2A25A829AAEE23CD583ACE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Securities, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfSecuritiesNet" xlink:label="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6E7C75BAF2A25A829AAEE23CD583ACE0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6E7C75BAF2A25A829AAEE23CD583ACE0" xlink:to="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_6E7C75BAF2A25A829AAEE23CD583ACE0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairmentOfInvestments_2D1B4CBEAF7B942D0B14A04F74992F94_negatedLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfInvestments_F1682AFF2B69544FB972FC8DCC66221B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other-than-temporary impairments</link:label>
    <link:label id="lab_us-gaap_ImpairmentOfInvestments_2D1B4CBEAF7B942D0B14A04F74992F94_label_en-US" xlink:label="lab_us-gaap_ImpairmentOfInvestments_F1682AFF2B69544FB972FC8DCC66221B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other than Temporary Impairment Losses, Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="loc_us-gaap_ImpairmentOfInvestments_F1682AFF2B69544FB972FC8DCC66221B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairmentOfInvestments_F1682AFF2B69544FB972FC8DCC66221B" xlink:to="lab_us-gaap_ImpairmentOfInvestments_F1682AFF2B69544FB972FC8DCC66221B" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_527645995B76060B7B67A04F7499532E_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2A219B265E16566487EABEC7DFBE102B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other-than-temporary impairments on fixed income securities recognized in other comprehensive income</link:label>
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_527645995B76060B7B67A04F7499532E_label_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2A219B265E16566487EABEC7DFBE102B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Portion Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2A219B265E16566487EABEC7DFBE102B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2A219B265E16566487EABEC7DFBE102B" xlink:to="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_2A219B265E16566487EABEC7DFBE102B" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLosses_F2BA7302A4BDFEC60998A04F7499D6CC_verboseLabel_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLosses_5CC6288D241552FCB29DA923760E360F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total net realized gains (losses)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_5CC6288D241552FCB29DA923760E360F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedInvestmentGainsLosses_5CC6288D241552FCB29DA923760E360F" xlink:to="lab_us-gaap_RealizedInvestmentGainsLosses_5CC6288D241552FCB29DA923760E360F" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherIncome_0F6D4F6990DFFA401C3FA04F7499FE96_terseLabel_en-US" xlink:label="lab_us-gaap_OtherIncome_759645A8FA7D501B8E67134C708B3D0D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIncome" xlink:label="loc_us-gaap_OtherIncome_759645A8FA7D501B8E67134C708B3D0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherIncome_759645A8FA7D501B8E67134C708B3D0D" xlink:to="lab_us-gaap_OtherIncome_759645A8FA7D501B8E67134C708B3D0D" xlink:type="arc" />
    <link:label id="lab_us-gaap_Revenues_852737649C0527663B2AA04F7499DD08_totalLabel_en-US" xlink:label="lab_us-gaap_Revenues_9AC7BEF9B5A65AFDBC14112F5EA37E71" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total revenues</link:label>
    <link:label id="lab_us-gaap_Revenues_852737649C0527663B2AA04F7499DD08_label_en-US" xlink:label="lab_us-gaap_Revenues_9AC7BEF9B5A65AFDBC14112F5EA37E71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_9AC7BEF9B5A65AFDBC14112F5EA37E71" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues_9AC7BEF9B5A65AFDBC14112F5EA37E71" xlink:to="lab_us-gaap_Revenues_9AC7BEF9B5A65AFDBC14112F5EA37E71" xlink:type="arc" />
    <link:label id="lab_us-gaap_BenefitsLossesAndExpensesAbstract_6C1A538E8C1F406F10C0A04F7499425F_terseLabel_en-US" xlink:label="lab_us-gaap_BenefitsLossesAndExpensesAbstract_0E4F7F48D9D5502A886B69C62C0BAA45" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expenses:</link:label>
    <link:label id="lab_us-gaap_BenefitsLossesAndExpensesAbstract_6C1A538E8C1F406F10C0A04F7499425F_label_en-US" xlink:label="lab_us-gaap_BenefitsLossesAndExpensesAbstract_0E4F7F48D9D5502A886B69C62C0BAA45" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Benefits, Losses and Expenses [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BenefitsLossesAndExpensesAbstract" xlink:label="loc_us-gaap_BenefitsLossesAndExpensesAbstract_0E4F7F48D9D5502A886B69C62C0BAA45" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BenefitsLossesAndExpensesAbstract_0E4F7F48D9D5502A886B69C62C0BAA45" xlink:to="lab_us-gaap_BenefitsLossesAndExpensesAbstract_0E4F7F48D9D5502A886B69C62C0BAA45" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_116F98C6EAB43EEE74C1A04F74992D37_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_029B2E18F0EB5544B0F6E3B776B75614" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of deferred policy acquisition costs</link:label>
    <link:label id="lab_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_116F98C6EAB43EEE74C1A04F74992D37_label_en-US" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_029B2E18F0EB5544B0F6E3B776B75614" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Policy Acquisition Costs, Amortization Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_029B2E18F0EB5544B0F6E3B776B75614" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_029B2E18F0EB5544B0F6E3B776B75614" xlink:to="lab_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_029B2E18F0EB5544B0F6E3B776B75614" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseDebt_759E4B3D7F764D3F6FEEA04F74994DCB_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt_CB37AE574BD051DE8D1CBE684A1768EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpenseDebt_759E4B3D7F764D3F6FEEA04F74994DCB_label_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt_CB37AE574BD051DE8D1CBE684A1768EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:label="loc_us-gaap_InterestExpenseDebt_CB37AE574BD051DE8D1CBE684A1768EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseDebt_CB37AE574BD051DE8D1CBE684A1768EE" xlink:to="lab_us-gaap_InterestExpenseDebt_CB37AE574BD051DE8D1CBE684A1768EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingCostsAndExpenses_35ECFFCF8126624B6E30A08E7886DB2F_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingCostsAndExpenses_C1FF5BF822E752CCB920EA8DED8F6D07" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate expenses</link:label>
    <link:label id="lab_us-gaap_OperatingCostsAndExpenses_35ECFFCF8126624B6E30A08E7886DB2F_label_en-US" xlink:label="lab_us-gaap_OperatingCostsAndExpenses_C1FF5BF822E752CCB920EA8DED8F6D07" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Costs and Expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingCostsAndExpenses" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_C1FF5BF822E752CCB920EA8DED8F6D07" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingCostsAndExpenses_C1FF5BF822E752CCB920EA8DED8F6D07" xlink:to="lab_us-gaap_OperatingCostsAndExpenses_C1FF5BF822E752CCB920EA8DED8F6D07" xlink:type="arc" />
    <link:label id="lab_us-gaap_BenefitsLossesAndExpenses_1F289CCDB07EAFD2F4EBA04F7499FEBD_totalLabel_en-US" xlink:label="lab_us-gaap_BenefitsLossesAndExpenses_63ACE61A6DB952FE8F3F95A7AFAF153E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total expenses</link:label>
    <link:label id="lab_us-gaap_BenefitsLossesAndExpenses_1F289CCDB07EAFD2F4EBA04F7499FEBD_label_en-US" xlink:label="lab_us-gaap_BenefitsLossesAndExpenses_63ACE61A6DB952FE8F3F95A7AFAF153E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Benefits, Losses and Expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BenefitsLossesAndExpenses" xlink:label="loc_us-gaap_BenefitsLossesAndExpenses_63ACE61A6DB952FE8F3F95A7AFAF153E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_63ACE61A6DB952FE8F3F95A7AFAF153E" xlink:to="lab_us-gaap_BenefitsLossesAndExpenses_63ACE61A6DB952FE8F3F95A7AFAF153E" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_244F3020117E610E94DEA04F749A2CF0_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93DD3E5EEB025938BFB4C9DFE96ADC0C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income before federal income tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93DD3E5EEB025938BFB4C9DFE96ADC0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93DD3E5EEB025938BFB4C9DFE96ADC0C" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_93DD3E5EEB025938BFB4C9DFE96ADC0C" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_423A277485CF414167A9A04F749AEB5C_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_8D72FB472EEA565686B393C1451F8CAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal income tax expense:</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_423A277485CF414167A9A04F749AEB5C_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_8D72FB472EEA565686B393C1451F8CAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit), Continuing Operations [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_8D72FB472EEA565686B393C1451F8CAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_8D72FB472EEA565686B393C1451F8CAC" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsAbstract_8D72FB472EEA565686B393C1451F8CAC" xlink:type="arc" />
    <link:label id="lab_us-gaap_CurrentFederalTaxExpenseBenefit_E9CBD44D9307F9053E5DA04F749AEACA_terseLabel_en-US" xlink:label="lab_us-gaap_CurrentFederalTaxExpenseBenefit_F8809F8EBED756558E2ADF754079F584" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current</link:label>
    <link:label id="lab_us-gaap_CurrentFederalTaxExpenseBenefit_E9CBD44D9307F9053E5DA04F749AEACA_label_en-US" xlink:label="lab_us-gaap_CurrentFederalTaxExpenseBenefit_F8809F8EBED756558E2ADF754079F584" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Federal Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_F8809F8EBED756558E2ADF754079F584" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CurrentFederalTaxExpenseBenefit_F8809F8EBED756558E2ADF754079F584" xlink:to="lab_us-gaap_CurrentFederalTaxExpenseBenefit_F8809F8EBED756558E2ADF754079F584" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_E12D09FE6AD2D705A7C7A04F749AD8CC_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A100840916DD567F85AB41834CEFD072" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred</link:label>
    <link:label id="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_E12D09FE6AD2D705A7C7A04F749AD8CC_label_en-US" xlink:label="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A100840916DD567F85AB41834CEFD072" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Federal Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A100840916DD567F85AB41834CEFD072" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A100840916DD567F85AB41834CEFD072" xlink:to="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A100840916DD567F85AB41834CEFD072" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_E32D2B2237F357F3A71AA04F749A1C1C_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_EFF1FFDBB0C355148F9D61F12942E438" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total federal income tax expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_EFF1FFDBB0C355148F9D61F12942E438" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_EFF1FFDBB0C355148F9D61F12942E438" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_EFF1FFDBB0C355148F9D61F12942E438" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_B701D54220975A2F2711A04F749A0DE4_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_E5C3FC7953D55CC0A3BEAE856D8A6AB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings per share:</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_B701D54220975A2F2711A04F749A0DE4_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_E5C3FC7953D55CC0A3BEAE856D8A6AB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_E5C3FC7953D55CC0A3BEAE856D8A6AB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareAbstract_E5C3FC7953D55CC0A3BEAE856D8A6AB5" xlink:to="lab_us-gaap_EarningsPerShareAbstract_E5C3FC7953D55CC0A3BEAE856D8A6AB5" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasic_A413AB3F744596F4EF16A04F749AD91C_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_155CCD6D9E3F5E23BEDB47469B3BFDBB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic net income</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_A413AB3F744596F4EF16A04F749AD91C_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_155CCD6D9E3F5E23BEDB47469B3BFDBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_155CCD6D9E3F5E23BEDB47469B3BFDBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic_155CCD6D9E3F5E23BEDB47469B3BFDBB" xlink:to="lab_us-gaap_EarningsPerShareBasic_155CCD6D9E3F5E23BEDB47469B3BFDBB" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_EE24CE6E4107C524DDACA04F749AF9F8_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_1DAC96C120E85D638EE06C765DDB6926" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted net income</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_EE24CE6E4107C524DDACA04F749AF9F8_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_1DAC96C120E85D638EE06C765DDB6926" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_1DAC96C120E85D638EE06C765DDB6926" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted_1DAC96C120E85D638EE06C765DDB6926" xlink:to="lab_us-gaap_EarningsPerShareDiluted_1DAC96C120E85D638EE06C765DDB6926" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_77C8243599C8982A6B12A04F749A772F_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_8DBBBE99E677584A811BB1FB85A4BE11" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividends to stockholders</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_77C8243599C8982A6B12A04F749A772F_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_8DBBBE99E677584A811BB1FB85A4BE11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Dividends, Per Share, Declared</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_8DBBBE99E677584A811BB1FB85A4BE11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareDeclared_8DBBBE99E677584A811BB1FB85A4BE11" xlink:to="lab_us-gaap_CommonStockDividendsPerShareDeclared_8DBBBE99E677584A811BB1FB85A4BE11" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock_C18EA62F134F8C3F98BE101EE37E6F45_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock_332E644E85FB5B9790C509A0807CAC72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule III- Supplementary Insurance Information</link:label>
    <link:label id="lab_us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock_C18EA62F134F8C3F98BE101EE37E6F45_label_en-US" xlink:label="lab_us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock_332E644E85FB5B9790C509A0807CAC72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplementary Insurance Information, for Insurance Companies Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock" xlink:label="loc_us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock_332E644E85FB5B9790C509A0807CAC72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock_332E644E85FB5B9790C509A0807CAC72" xlink:to="lab_us-gaap_SupplementaryInsuranceInformationForInsuranceCompaniesDisclosureTextBlock_332E644E85FB5B9790C509A0807CAC72" xlink:type="arc" />
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract_E819DA21076FE8159CFD9167543F2399_label_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract_D6A860DCAA495953946BA2FA84CFFD18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Investments, Other than Investments in Related Parties [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract" xlink:label="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract_D6A860DCAA495953946BA2FA84CFFD18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract_D6A860DCAA495953946BA2FA84CFFD18" xlink:to="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesAbstract_D6A860DCAA495953946BA2FA84CFFD18" xlink:type="arc" />
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable_D3416976FC68D9AE24BA9167543F10F3_terseLabel_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable_968E52BD691E5F6998D53C72821C838F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Investments, Other than Investments in Related Parties [Table]</link:label>
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable_D3416976FC68D9AE24BA9167543F10F3_label_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable_968E52BD691E5F6998D53C72821C838F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Investments, Other than Investments in Related Parties [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable" xlink:label="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable_968E52BD691E5F6998D53C72821C838F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable_968E52BD691E5F6998D53C72821C838F" xlink:to="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTable_968E52BD691E5F6998D53C72821C838F" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockMember_AB05EA9DB956D1CCDB7F916754409966_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockMember_3B9FF056756A54D79701205EA26E33BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock [Member]</link:label>
    <link:label id="lab_us-gaap_PreferredStockMember_AB05EA9DB956D1CCDB7F916754409966_label_en-US" xlink:label="lab_us-gaap_PreferredStockMember_3B9FF056756A54D79701205EA26E33BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_3B9FF056756A54D79701205EA26E33BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockMember_3B9FF056756A54D79701205EA26E33BB" xlink:to="lab_us-gaap_PreferredStockMember_3B9FF056756A54D79701205EA26E33BB" xlink:type="arc" />
    <link:label id="lab_sigi_AFSFixedIncomeSecuritiesMember_17EEF55884D2F916D98D9167544073E5_terseLabel_en-US" xlink:label="lab_sigi_AFSFixedIncomeSecuritiesMember_71F1BAE8E0C550A8B8D99C17ADAB9094" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AFS Fixed Income Securities [Member]</link:label>
    <link:label id="lab_sigi_AFSFixedIncomeSecuritiesMember_17EEF55884D2F916D98D9167544073E5_label_en-US" xlink:label="lab_sigi_AFSFixedIncomeSecuritiesMember_71F1BAE8E0C550A8B8D99C17ADAB9094" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AFS Fixed Income Securities [Member]</link:label>
    <link:label id="lab_sigi_AFSFixedIncomeSecuritiesMember_17EEF55884D2F916D98D9167544073E5_documentation_en-US" xlink:label="lab_sigi_AFSFixedIncomeSecuritiesMember_71F1BAE8E0C550A8B8D99C17ADAB9094" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total of debt securities categorized neither as held-to-maturity nor trading.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AFSFixedIncomeSecuritiesMember" xlink:label="loc_sigi_AFSFixedIncomeSecuritiesMember_71F1BAE8E0C550A8B8D99C17ADAB9094" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AFSFixedIncomeSecuritiesMember_71F1BAE8E0C550A8B8D99C17ADAB9094" xlink:to="lab_sigi_AFSFixedIncomeSecuritiesMember_71F1BAE8E0C550A8B8D99C17ADAB9094" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockMember_CEB7B1185412AC2F7D1F9167544001E1_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember_F773AA22D249505093E960BA3B06C113" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_CEB7B1185412AC2F7D1F9167544001E1_label_en-US" xlink:label="lab_us-gaap_CommonStockMember_F773AA22D249505093E960BA3B06C113" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_F773AA22D249505093E960BA3B06C113" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember_F773AA22D249505093E960BA3B06C113" xlink:to="lab_us-gaap_CommonStockMember_F773AA22D249505093E960BA3B06C113" xlink:type="arc" />
    <link:label id="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_91EA1DE3DCE03C02FDDB916754406A5B_terseLabel_en-US" xlink:label="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_0EA6FFC9F52E5FC58DC682EC14312F02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">US Government Agencies Debt Securities [Member]</link:label>
    <link:label id="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_91EA1DE3DCE03C02FDDB916754406A5B_label_en-US" xlink:label="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_0EA6FFC9F52E5FC58DC682EC14312F02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Government Agencies Debt Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_0EA6FFC9F52E5FC58DC682EC14312F02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_0EA6FFC9F52E5FC58DC682EC14312F02" xlink:to="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_0EA6FFC9F52E5FC58DC682EC14312F02" xlink:type="arc" />
    <link:label id="lab_us-gaap_ForeignGovernmentDebtMember_29EEE19F1BFC79234B5E916754404242_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignGovernmentDebtMember_30BE3A050D06526B8DAF13B29800BC49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign Government</link:label>
    <link:label id="lab_us-gaap_ForeignGovernmentDebtMember_29EEE19F1BFC79234B5E916754404242_label_en-US" xlink:label="lab_us-gaap_ForeignGovernmentDebtMember_30BE3A050D06526B8DAF13B29800BC49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Government Debt [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignGovernmentDebtMember" xlink:label="loc_us-gaap_ForeignGovernmentDebtMember_30BE3A050D06526B8DAF13B29800BC49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignGovernmentDebtMember_30BE3A050D06526B8DAF13B29800BC49" xlink:to="lab_us-gaap_ForeignGovernmentDebtMember_30BE3A050D06526B8DAF13B29800BC49" xlink:type="arc" />
    <link:label id="lab_us-gaap_PublicUtilityBondsMember_E367183A8D5F50E25F1391675440E357_terseLabel_en-US" xlink:label="lab_us-gaap_PublicUtilityBondsMember_54083BB006AB54DEB9E704C215BA3833" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Public Utilities</link:label>
    <link:label id="lab_us-gaap_PublicUtilityBondsMember_E367183A8D5F50E25F1391675440E357_label_en-US" xlink:label="lab_us-gaap_PublicUtilityBondsMember_54083BB006AB54DEB9E704C215BA3833" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Public Utility, Bonds [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PublicUtilityBondsMember" xlink:label="loc_us-gaap_PublicUtilityBondsMember_54083BB006AB54DEB9E704C215BA3833" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PublicUtilityBondsMember_54083BB006AB54DEB9E704C215BA3833" xlink:to="lab_us-gaap_PublicUtilityBondsMember_54083BB006AB54DEB9E704C215BA3833" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllOtherCorporateBondsMember_6A16CA5D94D2B267B95891675440D16A_terseLabel_en-US" xlink:label="lab_us-gaap_AllOtherCorporateBondsMember_A520AED962B05D859699D1604E14F1A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All other corporate securities</link:label>
    <link:label id="lab_us-gaap_AllOtherCorporateBondsMember_6A16CA5D94D2B267B95891675440D16A_label_en-US" xlink:label="lab_us-gaap_AllOtherCorporateBondsMember_A520AED962B05D859699D1604E14F1A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Corporate Bonds [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllOtherCorporateBondsMember" xlink:label="loc_us-gaap_AllOtherCorporateBondsMember_A520AED962B05D859699D1604E14F1A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllOtherCorporateBondsMember_A520AED962B05D859699D1604E14F1A6" xlink:to="lab_us-gaap_AllOtherCorporateBondsMember_A520AED962B05D859699D1604E14F1A6" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesMember_2F6618817517EF97508B916754402159_terseLabel_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesMember_7C977D4A86205A4BA74430636AFDC4A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CLO and Other ABS</link:label>
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesMember_2F6618817517EF97508B916754402159_label_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesMember_7C977D4A86205A4BA74430636AFDC4A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateralized Mortgage Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_MortgageBackedSecuritiesMember_7C977D4A86205A4BA74430636AFDC4A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageBackedSecuritiesMember_7C977D4A86205A4BA74430636AFDC4A8" xlink:to="lab_us-gaap_MortgageBackedSecuritiesMember_7C977D4A86205A4BA74430636AFDC4A8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_4CA4E98E2F4AF692752891675441BF29_verboseLabel_en-US" xlink:label="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_3B4B238731BF59ED8010D78FAC76E83C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Residential Mortgage Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_3B4B238731BF59ED8010D78FAC76E83C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_3B4B238731BF59ED8010D78FAC76E83C" xlink:to="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_3B4B238731BF59ED8010D78FAC76E83C" xlink:type="arc" />
    <link:label id="lab_us-gaap_BanksTrustAndInsuranceEquitiesMember_880DB9D0566A007F23649167544113A8_terseLabel_en-US" xlink:label="lab_us-gaap_BanksTrustAndInsuranceEquitiesMember_0A613A4BBA0E5AC0A85FA7BFC490575C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Banks, trusts, and insurance companies</link:label>
    <link:label id="lab_us-gaap_BanksTrustAndInsuranceEquitiesMember_880DB9D0566A007F23649167544113A8_label_en-US" xlink:label="lab_us-gaap_BanksTrustAndInsuranceEquitiesMember_0A613A4BBA0E5AC0A85FA7BFC490575C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Banks, Trust and Insurance, Equities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BanksTrustAndInsuranceEquitiesMember" xlink:label="loc_us-gaap_BanksTrustAndInsuranceEquitiesMember_0A613A4BBA0E5AC0A85FA7BFC490575C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BanksTrustAndInsuranceEquitiesMember_0A613A4BBA0E5AC0A85FA7BFC490575C" xlink:to="lab_us-gaap_BanksTrustAndInsuranceEquitiesMember_0A613A4BBA0E5AC0A85FA7BFC490575C" xlink:type="arc" />
    <link:label id="lab_us-gaap_IndustrialMiscellaneousAndAllOthersMember_F8EC2C886A883B2F32E5916754415465_terseLabel_en-US" xlink:label="lab_us-gaap_IndustrialMiscellaneousAndAllOthersMember_CDE72A40B970576A9AF52E8DE385B030" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industrial, miscellaneous and all other</link:label>
    <link:label id="lab_us-gaap_IndustrialMiscellaneousAndAllOthersMember_F8EC2C886A883B2F32E5916754415465_label_en-US" xlink:label="lab_us-gaap_IndustrialMiscellaneousAndAllOthersMember_CDE72A40B970576A9AF52E8DE385B030" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industrial, Miscellaneous, and All Others [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndustrialMiscellaneousAndAllOthersMember" xlink:label="loc_us-gaap_IndustrialMiscellaneousAndAllOthersMember_CDE72A40B970576A9AF52E8DE385B030" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IndustrialMiscellaneousAndAllOthersMember_CDE72A40B970576A9AF52E8DE385B030" xlink:to="lab_us-gaap_IndustrialMiscellaneousAndAllOthersMember_CDE72A40B970576A9AF52E8DE385B030" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherInvestmentsMember_96561FB8AEF3D40CB4C291675441DEA2_terseLabel_en-US" xlink:label="lab_us-gaap_OtherInvestmentsMember_2C331723A88E5490900B8653ED0B3742" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Investments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherInvestmentsMember" xlink:label="loc_us-gaap_OtherInvestmentsMember_2C331723A88E5490900B8653ED0B3742" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherInvestmentsMember_2C331723A88E5490900B8653ED0B3742" xlink:to="lab_us-gaap_OtherInvestmentsMember_2C331723A88E5490900B8653ED0B3742" xlink:type="arc" />
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost_7388430DD9804C0BC17E91675441619D_terseLabel_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost_290D5EFEFC9C5999A7B1835D2F7DAF30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortized Cost or Cost</link:label>
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost_7388430DD9804C0BC17E91675441619D_label_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost_290D5EFEFC9C5999A7B1835D2F7DAF30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Investments, Other than Investments in Related Parties, Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost" xlink:label="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost_290D5EFEFC9C5999A7B1835D2F7DAF30" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost_290D5EFEFC9C5999A7B1835D2F7DAF30" xlink:to="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost_290D5EFEFC9C5999A7B1835D2F7DAF30" xlink:type="arc" />
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue_A6607E29AFD68F4F82AD916754419E15_terseLabel_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue_0A34BFFF916A5CDB8F0FE275971857D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value</link:label>
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue_A6607E29AFD68F4F82AD916754419E15_label_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue_0A34BFFF916A5CDB8F0FE275971857D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Investments, Other than Investments in Related Parties, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue" xlink:label="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue_0A34BFFF916A5CDB8F0FE275971857D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue_0A34BFFF916A5CDB8F0FE275971857D2" xlink:to="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue_0A34BFFF916A5CDB8F0FE275971857D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount_4AE21B4C77100C6E3CD491675441479F_terseLabel_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount_D4AA573A33AA5A53A4A56CB689F43A75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying Amount</link:label>
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount_4AE21B4C77100C6E3CD491675441479F_label_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount_D4AA573A33AA5A53A4A56CB689F43A75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Investments, Other than Investments in Related Parties, Carrying Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount" xlink:label="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount_D4AA573A33AA5A53A4A56CB689F43A75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount_D4AA573A33AA5A53A4A56CB689F43A75" xlink:to="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount_D4AA573A33AA5A53A4A56CB689F43A75" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAndQualifyingAccountsAbstract_15C344239A028D33882A101EE496D7F8_label_en-US" xlink:label="lab_us-gaap_ValuationAndQualifyingAccountsAbstract_8295C42B094252C3B88515E1E5F1974F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation and Qualifying Accounts [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsAbstract" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_8295C42B094252C3B88515E1E5F1974F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_8295C42B094252C3B88515E1E5F1974F" xlink:to="lab_us-gaap_ValuationAndQualifyingAccountsAbstract_8295C42B094252C3B88515E1E5F1974F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_FEE47478F5404BF3D59B101EE4962E53_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_6408C966DE1D53B3A8F8A346FA86100C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule V - Allowance for Uncollectible Premiums and Other Receivables</link:label>
    <link:label id="lab_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_FEE47478F5404BF3D59B101EE4962E53_label_en-US" xlink:label="lab_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_6408C966DE1D53B3A8F8A346FA86100C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" xlink:label="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_6408C966DE1D53B3A8F8A346FA86100C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_6408C966DE1D53B3A8F8A346FA86100C" xlink:to="lab_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_6408C966DE1D53B3A8F8A346FA86100C" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_886FC1CF40B79DDD76C71024D4F1CA59_label_en-US" xlink:label="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_BE1F42B06BFD56CD8A8ECF884604D628" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Comprehensive Income [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_BE1F42B06BFD56CD8A8ECF884604D628" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_BE1F42B06BFD56CD8A8ECF884604D628" xlink:to="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_BE1F42B06BFD56CD8A8ECF884604D628" xlink:type="arc" />
    <link:label id="lab_dei_LegalEntityAxis_752E0AB165829CDD30041024D4F1DE40_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis_C97D80CD7198596FA86A30000487F700" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:label id="lab_dei_LegalEntityAxis_752E0AB165829CDD30041024D4F1DE40_label_en-US" xlink:label="lab_dei_LegalEntityAxis_C97D80CD7198596FA86A30000487F700" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_C97D80CD7198596FA86A30000487F700" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis_C97D80CD7198596FA86A30000487F700" xlink:to="lab_dei_LegalEntityAxis_C97D80CD7198596FA86A30000487F700" xlink:type="arc" />
    <link:label id="lab_dei_EntityDomain_FDDCFFC85BD7E7930D351024D4F13E83_terseLabel_en-US" xlink:label="lab_dei_EntityDomain_C2C5B046EF305BD09BC342A0910571DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_FDDCFFC85BD7E7930D351024D4F13E83_label_en-US" xlink:label="lab_dei_EntityDomain_C2C5B046EF305BD09BC342A0910571DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_C2C5B046EF305BD09BC342A0910571DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain_C2C5B046EF305BD09BC342A0910571DD" xlink:to="lab_dei_EntityDomain_C2C5B046EF305BD09BC342A0910571DD" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_B79E55312E7CA5FC47F71024D4F1F434_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_4C3F472354D05D79943897EFEB86F65A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Unrealized holding gains (losses) arising during year</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_B79E55312E7CA5FC47F71024D4F1F434_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_4C3F472354D05D79943897EFEB86F65A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_4C3F472354D05D79943897EFEB86F65A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_4C3F472354D05D79943897EFEB86F65A" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_4C3F472354D05D79943897EFEB86F65A" xlink:type="arc" />
    <link:label id="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_B801E8FCFFBB576BADEA1024D4F2234F_terseLabel_en-US" xlink:label="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_C7519FC33AFB520082D77E9FD12680B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-credit portion of other-than-temporary impairments recognized in other comprehensive income</link:label>
    <link:label id="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_B801E8FCFFBB576BADEA1024D4F2234F_label_en-US" xlink:label="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_C7519FC33AFB520082D77E9FD12680B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Credit Portion of Other-Than-Temporary Impairments Recognized in Other Comprehensive Income</link:label>
    <link:label id="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_B801E8FCFFBB576BADEA1024D4F2234F_documentation_en-US" xlink:label="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_C7519FC33AFB520082D77E9FD12680B4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-credit portion of current other-than-temporary impairment losses on fixed maturity securities recognized in other comprehensive income net of tax. This item does not include changes in appreciation or loss in value.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome" xlink:label="loc_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_C7519FC33AFB520082D77E9FD12680B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_C7519FC33AFB520082D77E9FD12680B4" xlink:to="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentsRecognizedinOtherComprehensiveIncome_C7519FC33AFB520082D77E9FD12680B4" xlink:type="arc" />
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_25D2D7A582C993CDEAA51024D4F2A95F_negatedTerseLabel_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_FD6CEFA82BA25F9FA58D27B4DEC26D19" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Amounts reclassified into net income: Held-to-maturity securities</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax" xlink:label="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_FD6CEFA82BA25F9FA58D27B4DEC26D19" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_FD6CEFA82BA25F9FA58D27B4DEC26D19" xlink:to="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_FD6CEFA82BA25F9FA58D27B4DEC26D19" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_DEA8048601DCCB31E0DD1024D4F2A354_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_74B212D621505D78AF0CE3C4BD782D1F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Amounts reclassified into net income: Realized losses (gains) on available for sale securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_74B212D621505D78AF0CE3C4BD782D1F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_74B212D621505D78AF0CE3C4BD782D1F" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_74B212D621505D78AF0CE3C4BD782D1F" xlink:type="arc" />
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_F3FA2E704925A5EFA6B41024D4F2692D_negatedTotalLabel_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_C63BCDF63E3F5C1583C0A9C68703E23A" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Total unrealized gains (losses) on investment securities</link:label>
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_F3FA2E704925A5EFA6B41024D4F2692D_label_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_C63BCDF63E3F5C1583C0A9C68703E23A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Unrealized Gains Losses on Investment Securities</link:label>
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_F3FA2E704925A5EFA6B41024D4F2692D_documentation_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_C63BCDF63E3F5C1583C0A9C68703E23A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total change in unrealized gains/losses on investment securities net of tax.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalUnrealizedGainsLossesonInvestmentSecurities" xlink:label="loc_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_C63BCDF63E3F5C1583C0A9C68703E23A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_C63BCDF63E3F5C1583C0A9C68703E23A" xlink:to="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_C63BCDF63E3F5C1583C0A9C68703E23A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_D089E13C3D04D2FD8B9E1024D4F2E634_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_610A4508963C5389AB4CB5C87848F37B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net actuarial (loss) gain</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_610A4508963C5389AB4CB5C87848F37B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_610A4508963C5389AB4CB5C87848F37B" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_610A4508963C5389AB4CB5C87848F37B" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_02B7FECF59E8AFD789C51024D4F25DBC_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_A5BEFB835EDB55CF952D776D737AF52C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Amounts reclassified into net income: Net actuarial loss</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_02B7FECF59E8AFD789C51024D4F25DBC_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_A5BEFB835EDB55CF952D776D737AF52C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_A5BEFB835EDB55CF952D776D737AF52C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_A5BEFB835EDB55CF952D776D737AF52C" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_A5BEFB835EDB55CF952D776D737AF52C" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_8BDA53E0ECA219BECBC61024D4F2C85D_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_76C7D9E6D8285801A3F56078FDBE47DA" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Total defined benefit pension and post-retirement plans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_76C7D9E6D8285801A3F56078FDBE47DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_76C7D9E6D8285801A3F56078FDBE47DA" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_76C7D9E6D8285801A3F56078FDBE47DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_A16146329617ED3E28E11024D4F27522_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8DA89D54C7205B0C9A978FB19C615BE8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8DA89D54C7205B0C9A978FB19C615BE8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8DA89D54C7205B0C9A978FB19C615BE8" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8DA89D54C7205B0C9A978FB19C615BE8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_F42CA5CA4FC3404991171024D4F22FE7_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_5D9F6D127E93529DA278BDA202412BA1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_F42CA5CA4FC3404991171024D4F22FE7_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_5D9F6D127E93529DA278BDA202412BA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_5D9F6D127E93529DA278BDA202412BA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_5D9F6D127E93529DA278BDA202412BA1" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTax_5D9F6D127E93529DA278BDA202412BA1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_4BC41C88B0425386E740A02D085A2732_label_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_870D1F36CB4955D7A02DCDCAF4FDC047" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Compensation Related Costs, Share-based Payments [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_870D1F36CB4955D7A02DCDCAF4FDC047" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_870D1F36CB4955D7A02DCDCAF4FDC047" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_870D1F36CB4955D7A02DCDCAF4FDC047" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_3D4B94BE65F3BA27939CA02D085A6B4D_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_FEADB8D0A0445AAAA9FF1E38B72D5AD6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Retired Plans</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_3D4B94BE65F3BA27939CA02D085A6B4D_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_FEADB8D0A0445AAAA9FF1E38B72D5AD6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Retired Plans [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_3D4B94BE65F3BA27939CA02D085A6B4D_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_FEADB8D0A0445AAAA9FF1E38B72D5AD6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of Schedule of Share-Based Compensation Retired Plans including reserve shares and awards outstanding.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock" xlink:label="loc_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_FEADB8D0A0445AAAA9FF1E38B72D5AD6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_FEADB8D0A0445AAAA9FF1E38B72D5AD6" xlink:to="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTableTextBlock_FEADB8D0A0445AAAA9FF1E38B72D5AD6" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_0C9EE474A4B3544F95C2A02D085AC8C7_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_A69917696F6A5FD1BBE5D060258C38F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation ESPP and ASPP Shares Granted</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_0C9EE474A4B3544F95C2A02D085AC8C7_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_A69917696F6A5FD1BBE5D060258C38F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation ESPP and ASPP Shares Issued [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_0C9EE474A4B3544F95C2A02D085AC8C7_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_A69917696F6A5FD1BBE5D060258C38F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation ESPP and ASPP Shares Issued.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock" xlink:label="loc_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_A69917696F6A5FD1BBE5D060258C38F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_A69917696F6A5FD1BBE5D060258C38F7" xlink:to="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesIssuedTableTextBlock_A69917696F6A5FD1BBE5D060258C38F7" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_879F1FF71D82E631376CA02D085A7227_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_7EDE681A2EB1578CA22B9DEE6827C5C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Authorized and Available for Issuance</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_879F1FF71D82E631376CA02D085A7227_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_7EDE681A2EB1578CA22B9DEE6827C5C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Authorized, Available for Issuance, and Outstanding [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_879F1FF71D82E631376CA02D085A7227_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_7EDE681A2EB1578CA22B9DEE6827C5C3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Authorized, Available for Issuance, and Outstanding [Table]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock" xlink:label="loc_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_7EDE681A2EB1578CA22B9DEE6827C5C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_7EDE681A2EB1578CA22B9DEE6827C5C3" xlink:to="lab_sigi_ScheduleofShareBasedCompensationSharesAuthorizedAvailableforIssuanceandOutstandingTableTextBlock_7EDE681A2EB1578CA22B9DEE6827C5C3" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_AB4F8A07093EE0E09287A02D085AE7E4_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_9147123660F75981A0BB7A15EF8BCA37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Share-Based Compensation Plan Approval</link:label>
    <link:label id="lab_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_AB4F8A07093EE0E09287A02D085AE7E4_label_en-US" xlink:label="lab_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_9147123660F75981A0BB7A15EF8BCA37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Share-Based Compensation Plan Approval [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_AB4F8A07093EE0E09287A02D085AE7E4_documentation_en-US" xlink:label="lab_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_9147123660F75981A0BB7A15EF8BCA37" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Table Text Block] for Table that provides information regarding the approval of active share-based compensation plans.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock" xlink:label="loc_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_9147123660F75981A0BB7A15EF8BCA37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_9147123660F75981A0BB7A15EF8BCA37" xlink:to="lab_sigi_ScheduleOfShareBasedCompensationPlanApprovalTableTextBlock_9147123660F75981A0BB7A15EF8BCA37" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_34A9EB96A829E2872BECA02D085A2E03_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_1BB5A1566D6D5FEBBCB0C6714D44E48C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Types of Share-Based Payments Issued</link:label>
    <link:label id="lab_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_34A9EB96A829E2872BECA02D085A2E03_label_en-US" xlink:label="lab_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_1BB5A1566D6D5FEBBCB0C6714D44E48C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Types of Share-Based Payments Issued [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_34A9EB96A829E2872BECA02D085A2E03_documentation_en-US" xlink:label="lab_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_1BB5A1566D6D5FEBBCB0C6714D44E48C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Table that provides the types of share-based compensation that is issued.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock" xlink:label="loc_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_1BB5A1566D6D5FEBBCB0C6714D44E48C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_1BB5A1566D6D5FEBBCB0C6714D44E48C" xlink:to="lab_sigi_ScheduleofTypesofShareBasedPaymentsIssuedTableTextBlock_1BB5A1566D6D5FEBBCB0C6714D44E48C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_9850A2CE31951CF2C27CA02D085B69CF_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_5C8CE2DB50945C3DB55EB1E217DC4CDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Summary of Stock Option Transactions under Share Based Payment Plans</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_9850A2CE31951CF2C27CA02D085B69CF_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_5C8CE2DB50945C3DB55EB1E217DC4CDE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Stock Options, Activity [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_5C8CE2DB50945C3DB55EB1E217DC4CDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_5C8CE2DB50945C3DB55EB1E217DC4CDE" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_5C8CE2DB50945C3DB55EB1E217DC4CDE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_569DE1351BB1EC792BB1A02D08600340_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_7D63ED3C81E351AC9BD300B9FFB8E2BC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Summary of Restricted Stock Units Transactions under Share-Based Payment Plans</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_569DE1351BB1EC792BB1A02D08600340_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_7D63ED3C81E351AC9BD300B9FFB8E2BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_7D63ED3C81E351AC9BD300B9FFB8E2BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_7D63ED3C81E351AC9BD300B9FFB8E2BC" xlink:to="lab_us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_7D63ED3C81E351AC9BD300B9FFB8E2BC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_EA8ED05288320472443BA02D086017A7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_C54B3D64FFAE5C1898FDB1FFC238C18C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Weighted Average Assumptions for Employee Stock Purchase Plan</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_EA8ED05288320472443BA02D086017A7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_C54B3D64FFAE5C1898FDB1FFC238C18C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_C54B3D64FFAE5C1898FDB1FFC238C18C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_C54B3D64FFAE5C1898FDB1FFC238C18C" xlink:to="lab_us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock_C54B3D64FFAE5C1898FDB1FFC238C18C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_35DB9CE0EA8AA7E4879AA02D0860FFE9_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_6FDB529E7B0F58BCAAD54AD8F6447AD0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Weighted-Average Fair Value of Options and Stock Per Share</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_35DB9CE0EA8AA7E4879AA02D0860FFE9_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_6FDB529E7B0F58BCAAD54AD8F6447AD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_6FDB529E7B0F58BCAAD54AD8F6447AD0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_6FDB529E7B0F58BCAAD54AD8F6447AD0" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_6FDB529E7B0F58BCAAD54AD8F6447AD0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_4F8CC40FB711E4722A4EA02D08602413_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_21D8AD686643596991381DEBE2E471CF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Compensation Cost for Share-based Payment Arrangements</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_4F8CC40FB711E4722A4EA02D08602413_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_21D8AD686643596991381DEBE2E471CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_21D8AD686643596991381DEBE2E471CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_21D8AD686643596991381DEBE2E471CF" xlink:to="lab_us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_21D8AD686643596991381DEBE2E471CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_0C6DFB67E5B0E1144D0F101EE3B1E102_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_6CEBAEA063375F748FD4D9642D691BDA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments</link:label>
    <link:label id="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_0C6DFB67E5B0E1144D0F101EE3B1E102_label_en-US" xlink:label="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_6CEBAEA063375F748FD4D9642D691BDA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_6CEBAEA063375F748FD4D9642D691BDA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_6CEBAEA063375F748FD4D9642D691BDA" xlink:to="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_6CEBAEA063375F748FD4D9642D691BDA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A6E72AC108D0ACCD5ECC9B4F3ADB3FE2_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_72C4B414936553C1961E3E75BA27D581" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurements, Recurring and Nonrecurring [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A6E72AC108D0ACCD5ECC9B4F3ADB3FE2_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_72C4B414936553C1961E3E75BA27D581" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurements, Recurring and Nonrecurring [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_72C4B414936553C1961E3E75BA27D581" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_72C4B414936553C1961E3E75BA27D581" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_72C4B414936553C1961E3E75BA27D581" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_AB63DB5B0F10077575509B4F3ADBEF07_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_E292B89BD35954A58FE5E583F54E80A5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_AB63DB5B0F10077575509B4F3ADBEF07_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_E292B89BD35954A58FE5E583F54E80A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_E292B89BD35954A58FE5E583F54E80A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member_E292B89BD35954A58FE5E583F54E80A5" xlink:to="lab_us-gaap_FairValueInputsLevel1Member_E292B89BD35954A58FE5E583F54E80A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_08888ACE1EA7D48E8C1A9B4F3ADB43B7_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_2796C3334E0E58B6867AC814561C47E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Significant Other Observable Inputs (Level 2) [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_08888ACE1EA7D48E8C1A9B4F3ADB43B7_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_2796C3334E0E58B6867AC814561C47E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_2796C3334E0E58B6867AC814561C47E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member_2796C3334E0E58B6867AC814561C47E8" xlink:to="lab_us-gaap_FairValueInputsLevel2Member_2796C3334E0E58B6867AC814561C47E8" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_3715B11AE6BE4786275E9B4F3ADBBB2C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_C8255F68EC2657A9907335BB34791249" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Significant Unobservable Inputs (Level 3) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_C8255F68EC2657A9907335BB34791249" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member_C8255F68EC2657A9907335BB34791249" xlink:to="lab_us-gaap_FairValueInputsLevel3Member_C8255F68EC2657A9907335BB34791249" xlink:type="arc" />
    <link:label id="lab_us-gaap_USTreasuryAndGovernmentMember_53C9F88BB98F76EA301F9B4F3ADD1B9C_verboseLabel_en-US" xlink:label="lab_us-gaap_USTreasuryAndGovernmentMember_CDDB042F5FEA5B8AB66647312CEDB607" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">U.S. Government and Government Agencies and Authorities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_CDDB042F5FEA5B8AB66647312CEDB607" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USTreasuryAndGovernmentMember_CDDB042F5FEA5B8AB66647312CEDB607" xlink:to="lab_us-gaap_USTreasuryAndGovernmentMember_CDDB042F5FEA5B8AB66647312CEDB607" xlink:type="arc" />
    <link:label id="lab_us-gaap_ForeignGovernmentDebtSecuritiesMember_6D3AD9DB2B31B3F35AD49B4F3ADD53C3_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignGovernmentDebtSecuritiesMember_472408DCCE2F515AA3D5E1590BA80CD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign Government [Member]</link:label>
    <link:label id="lab_us-gaap_ForeignGovernmentDebtSecuritiesMember_6D3AD9DB2B31B3F35AD49B4F3ADD53C3_label_en-US" xlink:label="lab_us-gaap_ForeignGovernmentDebtSecuritiesMember_472408DCCE2F515AA3D5E1590BA80CD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Government Debt Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_472408DCCE2F515AA3D5E1590BA80CD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_472408DCCE2F515AA3D5E1590BA80CD8" xlink:to="lab_us-gaap_ForeignGovernmentDebtSecuritiesMember_472408DCCE2F515AA3D5E1590BA80CD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_NonredeemablePreferredStockMember_5406BABD5E874F5E0F759B4F3ADE0D64_terseLabel_en-US" xlink:label="lab_us-gaap_NonredeemablePreferredStockMember_44758761D0C5515A9D5F82F445931A2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nonredeemable Preferred Stock [Member]</link:label>
    <link:label id="lab_us-gaap_NonredeemablePreferredStockMember_5406BABD5E874F5E0F759B4F3ADE0D64_label_en-US" xlink:label="lab_us-gaap_NonredeemablePreferredStockMember_44758761D0C5515A9D5F82F445931A2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nonredeemable Preferred Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NonredeemablePreferredStockMember" xlink:label="loc_us-gaap_NonredeemablePreferredStockMember_44758761D0C5515A9D5F82F445931A2D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NonredeemablePreferredStockMember_44758761D0C5515A9D5F82F445931A2D" xlink:to="lab_us-gaap_NonredeemablePreferredStockMember_44758761D0C5515A9D5F82F445931A2D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_064B3A9266859E912D629B4F3ADE6000_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_239C40F9532D5E4F946B8D1B9A225D1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Frequency [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_064B3A9266859E912D629B4F3ADE6000_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_239C40F9532D5E4F946B8D1B9A225D1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Frequency [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_239C40F9532D5E4F946B8D1B9A225D1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_239C40F9532D5E4F946B8D1B9A225D1D" xlink:to="lab_us-gaap_FairValueByMeasurementFrequencyAxis_239C40F9532D5E4F946B8D1B9A225D1D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_EDD838F3D78E2E7273019B4F3ADFAA32_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_B2D2ABCD1DAE53B4B362CCE445FB57E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement Frequency [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_EDD838F3D78E2E7273019B4F3ADFAA32_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_B2D2ABCD1DAE53B4B362CCE445FB57E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement Frequency [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_B2D2ABCD1DAE53B4B362CCE445FB57E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_B2D2ABCD1DAE53B4B362CCE445FB57E6" xlink:to="lab_us-gaap_FairValueMeasurementFrequencyDomain_B2D2ABCD1DAE53B4B362CCE445FB57E6" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_2A24C9A8E70BF5C174AD9B4F3ADF43F6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_7E4D2F2609AC5CAB9125B07AB00F52DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Recurring [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_2A24C9A8E70BF5C174AD9B4F3ADF43F6_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_7E4D2F2609AC5CAB9125B07AB00F52DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Recurring [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_7E4D2F2609AC5CAB9125B07AB00F52DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsRecurringMember_7E4D2F2609AC5CAB9125B07AB00F52DE" xlink:to="lab_us-gaap_FairValueMeasurementsRecurringMember_7E4D2F2609AC5CAB9125B07AB00F52DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A9936F583EC8B84A17EC9B4F3ADFEB56_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_59FD855BECD75E64A1CB1F595CF77B4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A9936F583EC8B84A17EC9B4F3ADFEB56_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_59FD855BECD75E64A1CB1F595CF77B4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_59FD855BECD75E64A1CB1F595CF77B4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_59FD855BECD75E64A1CB1F595CF77B4D" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_59FD855BECD75E64A1CB1F595CF77B4D" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsNetAssetValue_12EEE7E5AC7549F16A8A9B50AFD48FE5_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsNetAssetValue_544A792D30155078B07971FA122A479B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments Net Asset Value</link:label>
    <link:label id="lab_us-gaap_InvestmentsNetAssetValue_12EEE7E5AC7549F16A8A9B50AFD48FE5_label_en-US" xlink:label="lab_us-gaap_InvestmentsNetAssetValue_544A792D30155078B07971FA122A479B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments Net Asset Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsNetAssetValue" xlink:label="loc_us-gaap_InvestmentsNetAssetValue_544A792D30155078B07971FA122A479B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsNetAssetValue_544A792D30155078B07971FA122A479B" xlink:to="lab_us-gaap_InvestmentsNetAssetValue_544A792D30155078B07971FA122A479B" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_BF2975359F02ECD30D8C9B4F3AE07FFB_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_0CB9F27BAF43570CB936CC47386B702B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Equity securities, AFS</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_BF2975359F02ECD30D8C9B4F3AE07FFB_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_0CB9F27BAF43570CB936CC47386B702B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Equity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesEquitySecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_0CB9F27BAF43570CB936CC47386B702B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_0CB9F27BAF43570CB936CC47386B702B" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_0CB9F27BAF43570CB936CC47386B702B" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecurities_4152AF9ADE61477A524D9B4F3AE0A229_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecurities_C2E24539A5FF52088600B9135E5F14BE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total AFS securities</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecurities_4152AF9ADE61477A524D9B4F3AE0A229_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecurities_C2E24539A5FF52088600B9135E5F14BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_C2E24539A5FF52088600B9135E5F14BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecurities_C2E24539A5FF52088600B9135E5F14BE" xlink:to="lab_us-gaap_AvailableForSaleSecurities_C2E24539A5FF52088600B9135E5F14BE" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherShortTermInvestments_228BB6E62942F6EEB0A59B4F3AE09144_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherShortTermInvestments_4B398C0DF26456ACB111583355ABB89E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Short-term investments</link:label>
    <link:label id="lab_us-gaap_OtherShortTermInvestments_228BB6E62942F6EEB0A59B4F3AE09144_label_en-US" xlink:label="lab_us-gaap_OtherShortTermInvestments_4B398C0DF26456ACB111583355ABB89E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Short-term Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherShortTermInvestments" xlink:label="loc_us-gaap_OtherShortTermInvestments_4B398C0DF26456ACB111583355ABB89E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherShortTermInvestments_4B398C0DF26456ACB111583355ABB89E" xlink:to="lab_us-gaap_OtherShortTermInvestments_4B398C0DF26456ACB111583355ABB89E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsFairValueDisclosure_A7E5DDDD2ABA7938FCD09B4F3AE0101A_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure_0D279F6D443454A09AAF657D561AD5B7" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
    <link:label id="lab_us-gaap_AssetsFairValueDisclosure_A7E5DDDD2ABA7938FCD09B4F3AE0101A_label_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure_0D279F6D443454A09AAF657D561AD5B7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_0D279F6D443454A09AAF657D561AD5B7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_0D279F6D443454A09AAF657D561AD5B7" xlink:to="lab_us-gaap_AssetsFairValueDisclosure_0D279F6D443454A09AAF657D561AD5B7" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_E36430F66DF0BC2A16769FB6F299FBE8_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_2704AD2C513C522DA05582D8264A0484" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for Claims and Claims Adjustment Expense [Table]</link:label>
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_E36430F66DF0BC2A16769FB6F299FBE8_label_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_2704AD2C513C522DA05582D8264A0484" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Claims and Claims Adjustment Expense [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_2704AD2C513C522DA05582D8264A0484" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_2704AD2C513C522DA05582D8264A0484" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseTable_2704AD2C513C522DA05582D8264A0484" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_0DDBDD1C393954A7E79D9FB6F299AE70_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_DD248D4EF1BF54A0847D6DA7EDB30C72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Liability For Unpaid Environmental Claims And Claims Adjustment Expense [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_0DDBDD1C393954A7E79D9FB6F299AE70_label_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_DD248D4EF1BF54A0847D6DA7EDB30C72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Liability For Unpaid Environmental Claims And Claims Adjustment Expense [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_0DDBDD1C393954A7E79D9FB6F299AE70_documentation_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_DD248D4EF1BF54A0847D6DA7EDB30C72" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of the activity in the environmental reserve for settling insured claims and expenses incurred in the claims settlement process for the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis" xlink:label="loc_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_DD248D4EF1BF54A0847D6DA7EDB30C72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_DD248D4EF1BF54A0847D6DA7EDB30C72" xlink:to="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseAxis_DD248D4EF1BF54A0847D6DA7EDB30C72" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_34F39D5DAE014AC9AA469FB6F299F309_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_AC68ECEA603C542C80DAF135B39A30D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Liability For Unpaid Environmental Claims And Claims Adjustment Expense [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_34F39D5DAE014AC9AA469FB6F299F309_label_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_AC68ECEA603C542C80DAF135B39A30D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Liability For Unpaid Environmental Claims And Claims Adjustment Expense [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_34F39D5DAE014AC9AA469FB6F299F309_documentation_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_AC68ECEA603C542C80DAF135B39A30D9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of the activity in the environmental reserve for settling insured claims and expenses incurred in the claims settlement process for the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain" xlink:label="loc_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_AC68ECEA603C542C80DAF135B39A30D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_AC68ECEA603C542C80DAF135B39A30D9" xlink:to="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseDomain_AC68ECEA603C542C80DAF135B39A30D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AsbestosIssueMember_851C41FCA3796F16402D9FB6F2994E7C_terseLabel_en-US" xlink:label="lab_us-gaap_AsbestosIssueMember_ABF293E21ECF526DBD338F303F7B8941" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asbestos [Member]</link:label>
    <link:label id="lab_us-gaap_AsbestosIssueMember_851C41FCA3796F16402D9FB6F2994E7C_label_en-US" xlink:label="lab_us-gaap_AsbestosIssueMember_ABF293E21ECF526DBD338F303F7B8941" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asbestos Issue [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AsbestosIssueMember" xlink:label="loc_us-gaap_AsbestosIssueMember_ABF293E21ECF526DBD338F303F7B8941" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AsbestosIssueMember_ABF293E21ECF526DBD338F303F7B8941" xlink:to="lab_us-gaap_AsbestosIssueMember_ABF293E21ECF526DBD338F303F7B8941" xlink:type="arc" />
    <link:label id="lab_sigi_EnvironmentalclaimsMember_2E84150D6AE0E0C2CEE39FB6F299BACD_terseLabel_en-US" xlink:label="lab_sigi_EnvironmentalclaimsMember_5F644084C0545C1E8C1E7C2FC094E012" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Enviromental [Member]</link:label>
    <link:label id="lab_sigi_EnvironmentalclaimsMember_2E84150D6AE0E0C2CEE39FB6F299BACD_label_en-US" xlink:label="lab_sigi_EnvironmentalclaimsMember_5F644084C0545C1E8C1E7C2FC094E012" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EnvironmentalClaims [Member]</link:label>
    <link:label id="lab_sigi_EnvironmentalclaimsMember_2E84150D6AE0E0C2CEE39FB6F299BACD_documentation_en-US" xlink:label="lab_sigi_EnvironmentalclaimsMember_5F644084C0545C1E8C1E7C2FC094E012" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents non-asbestos environmental related claims.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_EnvironmentalclaimsMember" xlink:label="loc_sigi_EnvironmentalclaimsMember_5F644084C0545C1E8C1E7C2FC094E012" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_EnvironmentalclaimsMember_5F644084C0545C1E8C1E7C2FC094E012" xlink:to="lab_sigi_EnvironmentalclaimsMember_5F644084C0545C1E8C1E7C2FC094E012" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_B02D1A3008AA1A2701839FB6F2990704_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_747CD976B9685C0BA97AE81F571D2B23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for Claims and Claims Adjustment Expense [Line Items]</link:label>
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_B02D1A3008AA1A2701839FB6F2990704_label_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_747CD976B9685C0BA97AE81F571D2B23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Claims and Claims Adjustment Expense [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_747CD976B9685C0BA97AE81F571D2B23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_747CD976B9685C0BA97AE81F571D2B23" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpenseLineItems_747CD976B9685C0BA97AE81F571D2B23" xlink:type="arc" />
    <link:label id="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_C822775F2E46858D381D9FB6F299C2E1_terseLabel_en-US" xlink:label="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_C64B81EA556B5840B8738BB46E85D083" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Salvage and Subrogation Recoveries, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalvageAndSubrogationRecoveriesValue" xlink:label="loc_us-gaap_SalvageAndSubrogationRecoveriesValue_C64B81EA556B5840B8738BB46E85D083" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SalvageAndSubrogationRecoveriesValue_C64B81EA556B5840B8738BB46E85D083" xlink:to="lab_us-gaap_SalvageAndSubrogationRecoveriesValue_C64B81EA556B5840B8738BB46E85D083" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_96D2637344A86229B9E69FB6F299A4B5_periodStartLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_32E624BD7F5D575B893ADD445AEBBB21" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Reserve for loss and loss expense at beginning of year, gross</link:label>
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_96D2637344A86229B9E69FB6F299A4B5_label_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_32E624BD7F5D575B893ADD445AEBBB21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Asbestos and Environmental Claims, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_32E624BD7F5D575B893ADD445AEBBB21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_32E624BD7F5D575B893ADD445AEBBB21" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_32E624BD7F5D575B893ADD445AEBBB21" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_D5E8483DB7CB77DB8ACF9FB6F299EDF6_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_C941871429E4556B9DB35947B2823215" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Incurred loss and loss expense, gross</link:label>
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_D5E8483DB7CB77DB8ACF9FB6F299EDF6_label_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_C941871429E4556B9DB35947B2823215" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Asbestos and Environmental Claims, Gross, Incurred Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_C941871429E4556B9DB35947B2823215" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_C941871429E4556B9DB35947B2823215" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossIncurredLoss1_C941871429E4556B9DB35947B2823215" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims_D888734482B207D801039FB6F2998510_negatedLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims_8B9C4F357AF35B12AD22D302CD34D4AA" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less: loss and loss expense paid, gross</link:label>
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims_D888734482B207D801039FB6F2998510_label_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims_8B9C4F357AF35B12AD22D302CD34D4AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Asbestos and Environmental Claims, Gross, Payment for Claims</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims_8B9C4F357AF35B12AD22D302CD34D4AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims_8B9C4F357AF35B12AD22D302CD34D4AA" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGrossPaymentForClaims_8B9C4F357AF35B12AD22D302CD34D4AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_23675C3B6C7E5A0578359FB6F299AB6B_periodEndLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_7FB5B878C7EC5CDA85E4E37C9093FF96" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Reserve for loss and loss expense at the end of year, gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_7FB5B878C7EC5CDA85E4E37C9093FF96" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_7FB5B878C7EC5CDA85E4E37C9093FF96" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_7FB5B878C7EC5CDA85E4E37C9093FF96" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_681DB23F147D3B57BD859FB6F299EE1A_periodStartLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_E58C127A98AB5954896A8E6481FAC8FF" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Reserve for loss and loss expense at beginning of year, net</link:label>
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_681DB23F147D3B57BD859FB6F299EE1A_label_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_E58C127A98AB5954896A8E6481FAC8FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Asbestos and Environmental Claims, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_E58C127A98AB5954896A8E6481FAC8FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_E58C127A98AB5954896A8E6481FAC8FF" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_E58C127A98AB5954896A8E6481FAC8FF" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1_D8DF95DBFE180DC2CD7D9FB6F299E2C9_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1_3A84DD6B8BA15D61BDE656BE22A12DD3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Incurred loss and loss expense, net</link:label>
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1_D8DF95DBFE180DC2CD7D9FB6F299E2C9_label_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1_3A84DD6B8BA15D61BDE656BE22A12DD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Asbestos and Environmental Claims, Net, Incurred Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1_3A84DD6B8BA15D61BDE656BE22A12DD3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1_3A84DD6B8BA15D61BDE656BE22A12DD3" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetIncurredLoss1_3A84DD6B8BA15D61BDE656BE22A12DD3" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_C0D9F8393E1E61A709E09FB6F299275A_negatedLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_2200D3B2C38A5C5EB30202E816CCB4B1" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less: loss and loss expense paid, net</link:label>
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_C0D9F8393E1E61A709E09FB6F299275A_label_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_2200D3B2C38A5C5EB30202E816CCB4B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Asbestos and Environmental Claims, Net, Payment for Claims</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_2200D3B2C38A5C5EB30202E816CCB4B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_2200D3B2C38A5C5EB30202E816CCB4B1" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNetPaymentForClaims_2200D3B2C38A5C5EB30202E816CCB4B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_C1A1C91FFF7A3372B0719FB6F29ABE80_periodEndLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_716D78543C1350CEB1B181CDBF730D72" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Reserve for loss and loss expense at the end of year, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_716D78543C1350CEB1B181CDBF730D72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_716D78543C1350CEB1B181CDBF730D72" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_716D78543C1350CEB1B181CDBF730D72" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_EBA44FC49FFC8AF04069101EE4799208_label_en-US" xlink:label="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_2E9E1CB118815D11932BC15EF35F9F18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract" xlink:label="loc_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_2E9E1CB118815D11932BC15EF35F9F18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_2E9E1CB118815D11932BC15EF35F9F18" xlink:to="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesAbstract_2E9E1CB118815D11932BC15EF35F9F18" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_36166C6473FD1180B5EF101EE4794995_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_656234558C0E5514A130CB18B61EE8D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance Premiums for Insurance Companies, by Product Segment [Table]</link:label>
    <link:label id="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_36166C6473FD1180B5EF101EE4794995_label_en-US" xlink:label="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_656234558C0E5514A130CB18B61EE8D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reinsurance Premiums for Insurance Companies, by Product Segment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable" xlink:label="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_656234558C0E5514A130CB18B61EE8D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_656234558C0E5514A130CB18B61EE8D4" xlink:to="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_656234558C0E5514A130CB18B61EE8D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProductOrServiceAxis_3FB659C69BDFF29C5B94101EE479C224_verboseLabel_en-US" xlink:label="lab_us-gaap_ProductOrServiceAxis_C1D27BEFF0215D56AA9E438ADB15D52A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance Premiums for Insurance Companies, by Product Segment [Axis]</link:label>
    <link:label id="lab_us-gaap_ProductOrServiceAxis_3FB659C69BDFF29C5B94101EE479C224_label_en-US" xlink:label="lab_us-gaap_ProductOrServiceAxis_C1D27BEFF0215D56AA9E438ADB15D52A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Products and Services [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_C1D27BEFF0215D56AA9E438ADB15D52A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductOrServiceAxis_C1D27BEFF0215D56AA9E438ADB15D52A" xlink:to="lab_us-gaap_ProductOrServiceAxis_C1D27BEFF0215D56AA9E438ADB15D52A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProductsAndServicesDomain_CFA14FBFDC4E9E1148B0101EE479581A_verboseLabel_en-US" xlink:label="lab_us-gaap_ProductsAndServicesDomain_F2D47BCEB52757DCBF7522B621F24271" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance Premiums for Insurance Companies, by Product Segment [Domain]</link:label>
    <link:label id="lab_us-gaap_ProductsAndServicesDomain_CFA14FBFDC4E9E1148B0101EE479581A_label_en-US" xlink:label="lab_us-gaap_ProductsAndServicesDomain_F2D47BCEB52757DCBF7522B621F24271" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Products and Services [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_F2D47BCEB52757DCBF7522B621F24271" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductsAndServicesDomain_F2D47BCEB52757DCBF7522B621F24271" xlink:to="lab_us-gaap_ProductsAndServicesDomain_F2D47BCEB52757DCBF7522B621F24271" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccidentAndHealthInsuranceSegmentMember_77DFF2A267879E5F2232101EE47A8F82_terseLabel_en-US" xlink:label="lab_us-gaap_AccidentAndHealthInsuranceSegmentMember_3836EF04AD4D5EB3853BF3AEB3C0CA17" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accident and Health Insurance Segment [Member]</link:label>
    <link:label id="lab_us-gaap_AccidentAndHealthInsuranceSegmentMember_77DFF2A267879E5F2232101EE47A8F82_label_en-US" xlink:label="lab_us-gaap_AccidentAndHealthInsuranceSegmentMember_3836EF04AD4D5EB3853BF3AEB3C0CA17" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accident and Health Insurance Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccidentAndHealthInsuranceSegmentMember" xlink:label="loc_us-gaap_AccidentAndHealthInsuranceSegmentMember_3836EF04AD4D5EB3853BF3AEB3C0CA17" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccidentAndHealthInsuranceSegmentMember_3836EF04AD4D5EB3853BF3AEB3C0CA17" xlink:to="lab_us-gaap_AccidentAndHealthInsuranceSegmentMember_3836EF04AD4D5EB3853BF3AEB3C0CA17" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember_BE2E17FB40605BD0A7F8101EE47A7688_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember_B672535044675682A34EED23970FE9C9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Property and liability insurance [Member]</link:label>
    <link:label id="lab_us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember_BE2E17FB40605BD0A7F8101EE47A7688_label_en-US" xlink:label="lab_us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember_B672535044675682A34EED23970FE9C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Liability and Casualty Insurance Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember" xlink:label="loc_us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember_B672535044675682A34EED23970FE9C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember_B672535044675682A34EED23970FE9C9" xlink:to="lab_us-gaap_PropertyLiabilityAndCasualtyInsuranceSegmentMember_B672535044675682A34EED23970FE9C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_DirectPremiumsEarned_2C22697DE6337839E5DE101EE47A533C_verboseLabel_en-US" xlink:label="lab_us-gaap_DirectPremiumsEarned_D41EF0928BB55B2197A1AA7EEFE4682C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Direct Amount</link:label>
    <link:label id="lab_us-gaap_DirectPremiumsEarned_2C22697DE6337839E5DE101EE47A533C_label_en-US" xlink:label="lab_us-gaap_DirectPremiumsEarned_D41EF0928BB55B2197A1AA7EEFE4682C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Direct Premiums Earned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DirectPremiumsEarned" xlink:label="loc_us-gaap_DirectPremiumsEarned_D41EF0928BB55B2197A1AA7EEFE4682C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DirectPremiumsEarned_D41EF0928BB55B2197A1AA7EEFE4682C" xlink:to="lab_us-gaap_DirectPremiumsEarned_D41EF0928BB55B2197A1AA7EEFE4682C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssumedPremiumsEarned_A4A924B2CC32524213DF101EE47A9F0E_verboseLabel_en-US" xlink:label="lab_us-gaap_AssumedPremiumsEarned_4149B3B8C5745716B2D910C6DD1CECBC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Assumed From Other Companies</link:label>
    <link:label id="lab_us-gaap_AssumedPremiumsEarned_A4A924B2CC32524213DF101EE47A9F0E_label_en-US" xlink:label="lab_us-gaap_AssumedPremiumsEarned_4149B3B8C5745716B2D910C6DD1CECBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assumed Premiums Earned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssumedPremiumsEarned" xlink:label="loc_us-gaap_AssumedPremiumsEarned_4149B3B8C5745716B2D910C6DD1CECBC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssumedPremiumsEarned_4149B3B8C5745716B2D910C6DD1CECBC" xlink:to="lab_us-gaap_AssumedPremiumsEarned_4149B3B8C5745716B2D910C6DD1CECBC" xlink:type="arc" />
    <link:label id="lab_us-gaap_CededPremiumsEarned_DA093C094634DB13E09E101EE47AB91D_terseLabel_en-US" xlink:label="lab_us-gaap_CededPremiumsEarned_760EAD91361E5414B0FCCB41EF549FC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ceded to Other Companies</link:label>
    <link:label id="lab_us-gaap_CededPremiumsEarned_DA093C094634DB13E09E101EE47AB91D_label_en-US" xlink:label="lab_us-gaap_CededPremiumsEarned_760EAD91361E5414B0FCCB41EF549FC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ceded Premiums Earned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CededPremiumsEarned" xlink:label="loc_us-gaap_CededPremiumsEarned_760EAD91361E5414B0FCCB41EF549FC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CededPremiumsEarned_760EAD91361E5414B0FCCB41EF549FC9" xlink:to="lab_us-gaap_CededPremiumsEarned_760EAD91361E5414B0FCCB41EF549FC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_6F99C99C924D7A980A16101EE47A0089_totalLabel_en-US" xlink:label="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_0E77BB9847B2505A844BBC5AEB62061A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Net Premiums Earned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsEarnedNetPropertyAndCasualty" xlink:label="loc_us-gaap_PremiumsEarnedNetPropertyAndCasualty_0E77BB9847B2505A844BBC5AEB62061A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsEarnedNetPropertyAndCasualty_0E77BB9847B2505A844BBC5AEB62061A" xlink:to="lab_us-gaap_PremiumsEarnedNetPropertyAndCasualty_0E77BB9847B2505A844BBC5AEB62061A" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsPercentageAssumedToNet_94AF3063AA2DE040EBD6101EE47A17F4_terseLabel_en-US" xlink:label="lab_us-gaap_PremiumsPercentageAssumedToNet_6B8A71F295DF59EFA66F6C57BA248014" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of Amount Assumed to Net</link:label>
    <link:label id="lab_us-gaap_PremiumsPercentageAssumedToNet_94AF3063AA2DE040EBD6101EE47A17F4_label_en-US" xlink:label="lab_us-gaap_PremiumsPercentageAssumedToNet_6B8A71F295DF59EFA66F6C57BA248014" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums, Percentage Assumed to Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsPercentageAssumedToNet" xlink:label="loc_us-gaap_PremiumsPercentageAssumedToNet_6B8A71F295DF59EFA66F6C57BA248014" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsPercentageAssumedToNet_6B8A71F295DF59EFA66F6C57BA248014" xlink:to="lab_us-gaap_PremiumsPercentageAssumedToNet_6B8A71F295DF59EFA66F6C57BA248014" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConsolidatedEntitiesAxis_93E1B2DE355EB073AF0F8113160F0A5B_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesAxis_F4A95F4871485239938F4CAA1C39EEF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:label id="lab_us-gaap_ConsolidatedEntitiesAxis_93E1B2DE355EB073AF0F8113160F0A5B_label_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesAxis_F4A95F4871485239938F4CAA1C39EEF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F4A95F4871485239938F4CAA1C39EEF7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F4A95F4871485239938F4CAA1C39EEF7" xlink:to="lab_us-gaap_ConsolidatedEntitiesAxis_F4A95F4871485239938F4CAA1C39EEF7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConsolidatedEntitiesDomain_D86BF8300675DD2385B18113160FF308_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesDomain_8B72CDD71B295E2380DD000F6E255C35" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:label id="lab_us-gaap_ConsolidatedEntitiesDomain_D86BF8300675DD2385B18113160FF308_label_en-US" xlink:label="lab_us-gaap_ConsolidatedEntitiesDomain_8B72CDD71B295E2380DD000F6E255C35" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_8B72CDD71B295E2380DD000F6E255C35" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_8B72CDD71B295E2380DD000F6E255C35" xlink:to="lab_us-gaap_ConsolidatedEntitiesDomain_8B72CDD71B295E2380DD000F6E255C35" xlink:type="arc" />
    <link:label id="lab_us-gaap_ParentCompanyMember_E9A03F4DB8377DA174C08113160F9F51_terseLabel_en-US" xlink:label="lab_us-gaap_ParentCompanyMember_BF7F960559605964A06FD51C0205C4B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Parent Company [Member]</link:label>
    <link:label id="lab_us-gaap_ParentCompanyMember_E9A03F4DB8377DA174C08113160F9F51_label_en-US" xlink:label="lab_us-gaap_ParentCompanyMember_BF7F960559605964A06FD51C0205C4B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Parent Company [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="loc_us-gaap_ParentCompanyMember_BF7F960559605964A06FD51C0205C4B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ParentCompanyMember_BF7F960559605964A06FD51C0205C4B2" xlink:to="lab_us-gaap_ParentCompanyMember_BF7F960559605964A06FD51C0205C4B2" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsAbstract_4582FF8D2DF2554B46B78113160FD80C_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_5210D10709245BFBB1B0699125EDD574" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ASSETS</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_4582FF8D2DF2554B46B78113160FD80C_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_5210D10709245BFBB1B0699125EDD574" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_5210D10709245BFBB1B0699125EDD574" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_5210D10709245BFBB1B0699125EDD574" xlink:to="lab_us-gaap_AssetsAbstract_5210D10709245BFBB1B0699125EDD574" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_A2DD2325C59F57BB43278113160FD6C3_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D9020D78433D549D8EFF31E49BDC2D3B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fixed income securities, available-for-sale &#8211; at fair value (amortized cost: $89,799 &#8211; 2017; $73,471 &#8211; 2016)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D9020D78433D549D8EFF31E49BDC2D3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D9020D78433D549D8EFF31E49BDC2D3B" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D9020D78433D549D8EFF31E49BDC2D3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_Cash_1F81881061FBF84B8BA38113160FFA6C_terseLabel_en-US" xlink:label="lab_us-gaap_Cash_C91D4E88D715502AA5677087C7E7C012" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash</link:label>
    <link:label id="lab_us-gaap_Cash_1F81881061FBF84B8BA38113160FFA6C_label_en-US" xlink:label="lab_us-gaap_Cash_C91D4E88D715502AA5677087C7E7C012" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_C91D4E88D715502AA5677087C7E7C012" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Cash_C91D4E88D715502AA5677087C7E7C012" xlink:to="lab_us-gaap_Cash_C91D4E88D715502AA5677087C7E7C012" xlink:type="arc" />
    <link:label id="lab_sigi_InvestmentInSubsidiaries_472F89171F1B2626D7668113160F6D8A_terseLabel_en-US" xlink:label="lab_sigi_InvestmentInSubsidiaries_DF7707A0A5DE55828D4295EBE06A87D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment in subsidiaries</link:label>
    <link:label id="lab_sigi_InvestmentInSubsidiaries_472F89171F1B2626D7668113160F6D8A_label_en-US" xlink:label="lab_sigi_InvestmentInSubsidiaries_DF7707A0A5DE55828D4295EBE06A87D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment In Subsidiaries</link:label>
    <link:label id="lab_sigi_InvestmentInSubsidiaries_472F89171F1B2626D7668113160F6D8A_documentation_en-US" xlink:label="lab_sigi_InvestmentInSubsidiaries_DF7707A0A5DE55828D4295EBE06A87D2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The parent company's equity interest in its subsidiaries.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_InvestmentInSubsidiaries" xlink:label="loc_sigi_InvestmentInSubsidiaries_DF7707A0A5DE55828D4295EBE06A87D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_InvestmentInSubsidiaries_DF7707A0A5DE55828D4295EBE06A87D2" xlink:to="lab_sigi_InvestmentInSubsidiaries_DF7707A0A5DE55828D4295EBE06A87D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReceivable_0FE56502341743C1F48A8113160F33DF_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReceivable_3AE63CDE9F3E5B4DB3F7EECA18B9887A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current federal income tax</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReceivable_0FE56502341743C1F48A8113160F33DF_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReceivable_3AE63CDE9F3E5B4DB3F7EECA18B9887A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReceivable" xlink:label="loc_us-gaap_IncomeTaxReceivable_3AE63CDE9F3E5B4DB3F7EECA18B9887A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReceivable_3AE63CDE9F3E5B4DB3F7EECA18B9887A" xlink:to="lab_us-gaap_IncomeTaxReceivable_3AE63CDE9F3E5B4DB3F7EECA18B9887A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsNet_AC7883B40303981E89FD8113160FB648_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNet_73ADE352DBB35E3E941B40B01F2DD60D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred federal income tax</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsNet_AC7883B40303981E89FD8113160FB648_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNet_73ADE352DBB35E3E941B40B01F2DD60D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Net of Valuation Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_73ADE352DBB35E3E941B40B01F2DD60D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_73ADE352DBB35E3E941B40B01F2DD60D" xlink:to="lab_us-gaap_DeferredTaxAssetsNet_73ADE352DBB35E3E941B40B01F2DD60D" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssets_035808B0346C9183FEEB8113160FB283_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets_07ED546819A6519D97886DCC292B983A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssets_035808B0346C9183FEEB8113160FB283_label_en-US" xlink:label="lab_us-gaap_OtherAssets_07ED546819A6519D97886DCC292B983A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssets" xlink:label="loc_us-gaap_OtherAssets_07ED546819A6519D97886DCC292B983A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets_07ED546819A6519D97886DCC292B983A" xlink:to="lab_us-gaap_OtherAssets_07ED546819A6519D97886DCC292B983A" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_6DDDE45AF4FE444766698113160F9868_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_3C20F186F7A2501DBCFAEA3CEA096815" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_6DDDE45AF4FE444766698113160F9868_label_en-US" xlink:label="lab_us-gaap_Assets_3C20F186F7A2501DBCFAEA3CEA096815" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_3C20F186F7A2501DBCFAEA3CEA096815" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_3C20F186F7A2501DBCFAEA3CEA096815" xlink:to="lab_us-gaap_Assets_3C20F186F7A2501DBCFAEA3CEA096815" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A16697E1875FB977D30B8113160FD1A8_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1309B8E7A1EB5D1AA3A2198198B97B20" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A16697E1875FB977D30B8113160FD1A8_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1309B8E7A1EB5D1AA3A2198198B97B20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1309B8E7A1EB5D1AA3A2198198B97B20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1309B8E7A1EB5D1AA3A2198198B97B20" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1309B8E7A1EB5D1AA3A2198198B97B20" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebt_A5ED4C751B2CA5D063458113160F62F8_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt_6F27DFD9C67859EEAD5CCCC5A3C81FA0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebt_A5ED4C751B2CA5D063458113160F62F8_label_en-US" xlink:label="lab_us-gaap_LongTermDebt_6F27DFD9C67859EEAD5CCCC5A3C81FA0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_6F27DFD9C67859EEAD5CCCC5A3C81FA0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt_6F27DFD9C67859EEAD5CCCC5A3C81FA0" xlink:to="lab_us-gaap_LongTermDebt_6F27DFD9C67859EEAD5CCCC5A3C81FA0" xlink:type="arc" />
    <link:label id="lab_sigi_IntercompanyNotesPayable_384F0522E0E4D7433D2A8113160F4C4E_terseLabel_en-US" xlink:label="lab_sigi_IntercompanyNotesPayable_468FEE830B67583C855D3382AD7A375E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intercompany notes payable</link:label>
    <link:label id="lab_sigi_IntercompanyNotesPayable_384F0522E0E4D7433D2A8113160F4C4E_label_en-US" xlink:label="lab_sigi_IntercompanyNotesPayable_468FEE830B67583C855D3382AD7A375E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intercompany Notes Payable</link:label>
    <link:label id="lab_sigi_IntercompanyNotesPayable_384F0522E0E4D7433D2A8113160F4C4E_documentation_en-US" xlink:label="lab_sigi_IntercompanyNotesPayable_468FEE830B67583C855D3382AD7A375E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Including current and noncurrent portions, aggregate carrying amount of intercompany long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_IntercompanyNotesPayable" xlink:label="loc_sigi_IntercompanyNotesPayable_468FEE830B67583C855D3382AD7A375E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_IntercompanyNotesPayable_468FEE830B67583C855D3382AD7A375E" xlink:to="lab_sigi_IntercompanyNotesPayable_468FEE830B67583C855D3382AD7A375E" xlink:type="arc" />
    <link:label id="lab_sigi_AccruedLongTermStockCompensation_E0B180D2D4F3E93B954E8113160FC0E6_terseLabel_en-US" xlink:label="lab_sigi_AccruedLongTermStockCompensation_DB5B9A0BE3745D6DA2BD7F46496200AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued long-term stock compensation</link:label>
    <link:label id="lab_sigi_AccruedLongTermStockCompensation_E0B180D2D4F3E93B954E8113160FC0E6_label_en-US" xlink:label="lab_sigi_AccruedLongTermStockCompensation_DB5B9A0BE3745D6DA2BD7F46496200AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Long Term Stock Compensation</link:label>
    <link:label id="lab_sigi_AccruedLongTermStockCompensation_E0B180D2D4F3E93B954E8113160FC0E6_documentation_en-US" xlink:label="lab_sigi_AccruedLongTermStockCompensation_DB5B9A0BE3745D6DA2BD7F46496200AA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents our long term stock compensation accrued liability</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AccruedLongTermStockCompensation" xlink:label="loc_sigi_AccruedLongTermStockCompensation_DB5B9A0BE3745D6DA2BD7F46496200AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AccruedLongTermStockCompensation_DB5B9A0BE3745D6DA2BD7F46496200AA" xlink:to="lab_sigi_AccruedLongTermStockCompensation_DB5B9A0BE3745D6DA2BD7F46496200AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilities_3AEF1C7241C2CEF6FC8F8113161E0A75_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilities_F044907CBAB9567E920FCBC61A975CC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilities_3AEF1C7241C2CEF6FC8F8113161E0A75_label_en-US" xlink:label="lab_us-gaap_OtherLiabilities_F044907CBAB9567E920FCBC61A975CC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLiabilities" xlink:label="loc_us-gaap_OtherLiabilities_F044907CBAB9567E920FCBC61A975CC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilities_F044907CBAB9567E920FCBC61A975CC8" xlink:to="lab_us-gaap_OtherLiabilities_F044907CBAB9567E920FCBC61A975CC8" xlink:type="arc" />
    <link:label id="lab_us-gaap_Liabilities_CDBD42F39C87864856598113161E1655_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities_ACD3D401A1ED51ECA5F1B99C09C9E4AB" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_CDBD42F39C87864856598113161E1655_label_en-US" xlink:label="lab_us-gaap_Liabilities_ACD3D401A1ED51ECA5F1B99C09C9E4AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_ACD3D401A1ED51ECA5F1B99C09C9E4AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities_ACD3D401A1ED51ECA5F1B99C09C9E4AB" xlink:to="lab_us-gaap_Liabilities_ACD3D401A1ED51ECA5F1B99C09C9E4AB" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_60D1531E7F7A1C2810678113161EA1C9_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_F67B1FF1878B5D95A6A8ADBE6DAE6657" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stockholders&#8217; Equity:</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_60D1531E7F7A1C2810678113161EA1C9_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_F67B1FF1878B5D95A6A8ADBE6DAE6657" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_F67B1FF1878B5D95A6A8ADBE6DAE6657" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityAbstract_F67B1FF1878B5D95A6A8ADBE6DAE6657" xlink:to="lab_us-gaap_StockholdersEquityAbstract_F67B1FF1878B5D95A6A8ADBE6DAE6657" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockValue_B53A886BF12F79D512D78113161EF82A_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue_6DEFA35C05CA590AACEEDCAE6E77DDCF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock of $0 par value per share: Authorized shares: 5,000,000; no shares issued or outstanding</link:label>
    <link:label id="lab_us-gaap_PreferredStockValue_B53A886BF12F79D512D78113161EF82A_label_en-US" xlink:label="lab_us-gaap_PreferredStockValue_6DEFA35C05CA590AACEEDCAE6E77DDCF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Value, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_6DEFA35C05CA590AACEEDCAE6E77DDCF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockValue_6DEFA35C05CA590AACEEDCAE6E77DDCF" xlink:to="lab_us-gaap_PreferredStockValue_6DEFA35C05CA590AACEEDCAE6E77DDCF" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockValue_5F33C5965AB623784AE18113161E8007_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_5FEAB9FC5AC75B8E9630EAD1030636DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock of $2 par value per share Authorized shares: 360,000,000 Issued: 102,284,564 - 2017; 101,620,436 - 2016</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_5F33C5965AB623784AE18113161E8007_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_5FEAB9FC5AC75B8E9630EAD1030636DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Value, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_5FEAB9FC5AC75B8E9630EAD1030636DF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue_5FEAB9FC5AC75B8E9630EAD1030636DF" xlink:to="lab_us-gaap_CommonStockValue_5FEAB9FC5AC75B8E9630EAD1030636DF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_EB75B7A9B79DB07013B48113161E58C5_verboseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_EAEA81DEA7255122ADA29C0D96FD1DAE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Additional paid-in capital</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_EB75B7A9B79DB07013B48113161E58C5_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_EAEA81DEA7255122ADA29C0D96FD1DAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid in Capital, Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_EAEA81DEA7255122ADA29C0D96FD1DAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalCommonStock_EAEA81DEA7255122ADA29C0D96FD1DAE" xlink:to="lab_us-gaap_AdditionalPaidInCapitalCommonStock_EAEA81DEA7255122ADA29C0D96FD1DAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_2BDDC9175B4A436671598113161E6732_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_9697E05EAF1251B69F97E3D2209866EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_2BDDC9175B4A436671598113161E6732_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_9697E05EAF1251B69F97E3D2209866EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_9697E05EAF1251B69F97E3D2209866EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsAccumulatedDeficit_9697E05EAF1251B69F97E3D2209866EF" xlink:to="lab_us-gaap_RetainedEarningsAccumulatedDeficit_9697E05EAF1251B69F97E3D2209866EF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_69C10E8C291ED747CA9D8113161E1853_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_D6CF40387C8A54538214520977B9B28C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive income (loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_D6CF40387C8A54538214520977B9B28C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_D6CF40387C8A54538214520977B9B28C" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_D6CF40387C8A54538214520977B9B28C" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockValue_7F2FD9914C376A342D648113161EA42F_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_03EEFBC560DB5BE88F00DF66F3DCFA3B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Treasury stock &#8211; at cost (shares: 43,789,442 &#8211; 2017; 43,653,237 &#8211; 2016)</link:label>
    <link:label id="lab_us-gaap_TreasuryStockValue_7F2FD9914C376A342D648113161EA42F_label_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_03EEFBC560DB5BE88F00DF66F3DCFA3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_03EEFBC560DB5BE88F00DF66F3DCFA3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockValue_03EEFBC560DB5BE88F00DF66F3DCFA3B" xlink:to="lab_us-gaap_TreasuryStockValue_03EEFBC560DB5BE88F00DF66F3DCFA3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_A69A8106A4B9185CAE6D8113161E0463_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_DB9A3DAAD0BA57EA96FB705C15962AA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_DB9A3DAAD0BA57EA96FB705C15962AA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_DB9A3DAAD0BA57EA96FB705C15962AA6" xlink:to="lab_us-gaap_StockholdersEquity_DB9A3DAAD0BA57EA96FB705C15962AA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_D9B09FE2B87581BF5E7F8113161ED5BB_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_2B31CCBAC44F5E3B94998D7FF28102F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total liabilities and stockholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_D9B09FE2B87581BF5E7F8113161ED5BB_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_2B31CCBAC44F5E3B94998D7FF28102F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_2B31CCBAC44F5E3B94998D7FF28102F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_2B31CCBAC44F5E3B94998D7FF28102F2" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity_2B31CCBAC44F5E3B94998D7FF28102F2" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_121CE626C31EC0F2477C9FE30BCB62E0_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_2019A70148F75074B16E6FFA9DDB571F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_121CE626C31EC0F2477C9FE30BCB62E0_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_2019A70148F75074B16E6FFA9DDB571F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:label="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock_2019A70148F75074B16E6FFA9DDB571F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock_2019A70148F75074B16E6FFA9DDB571F" xlink:to="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_2019A70148F75074B16E6FFA9DDB571F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceDisclosuresAbstract_7E437394D9D7F9F08264816F5B42A34D_label_en-US" xlink:label="lab_us-gaap_ReinsuranceDisclosuresAbstract_2CF14892A68E5000A633379FFE021155" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reinsurance Disclosures [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceDisclosuresAbstract" xlink:label="loc_us-gaap_ReinsuranceDisclosuresAbstract_2CF14892A68E5000A633379FFE021155" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceDisclosuresAbstract_2CF14892A68E5000A633379FFE021155" xlink:to="lab_us-gaap_ReinsuranceDisclosuresAbstract_2CF14892A68E5000A633379FFE021155" xlink:type="arc" />
    <link:label id="lab_us-gaap_CededCreditRiskTable_0A5C6C96637AD00146A4816F5B42778B_terseLabel_en-US" xlink:label="lab_us-gaap_CededCreditRiskTable_4357D4A70A135DE1BDB3B842A1D3F1F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ceded Credit Risk [Table]</link:label>
    <link:label id="lab_us-gaap_CededCreditRiskTable_0A5C6C96637AD00146A4816F5B42778B_label_en-US" xlink:label="lab_us-gaap_CededCreditRiskTable_4357D4A70A135DE1BDB3B842A1D3F1F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ceded Credit Risk [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CededCreditRiskTable" xlink:label="loc_us-gaap_CededCreditRiskTable_4357D4A70A135DE1BDB3B842A1D3F1F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CededCreditRiskTable_4357D4A70A135DE1BDB3B842A1D3F1F3" xlink:to="lab_us-gaap_CededCreditRiskTable_4357D4A70A135DE1BDB3B842A1D3F1F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_CededCreditRiskAxis_B2F3F2911C978039E8A3816F5B421BF9_terseLabel_en-US" xlink:label="lab_us-gaap_CededCreditRiskAxis_00C20C64D3985CEB9D41A09944764C6F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ceded Credit Risk [Axis]</link:label>
    <link:label id="lab_us-gaap_CededCreditRiskAxis_B2F3F2911C978039E8A3816F5B421BF9_label_en-US" xlink:label="lab_us-gaap_CededCreditRiskAxis_00C20C64D3985CEB9D41A09944764C6F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ceded Credit Risk, Reinsurer [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CededCreditRiskAxis" xlink:label="loc_us-gaap_CededCreditRiskAxis_00C20C64D3985CEB9D41A09944764C6F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CededCreditRiskAxis_00C20C64D3985CEB9D41A09944764C6F" xlink:to="lab_us-gaap_CededCreditRiskAxis_00C20C64D3985CEB9D41A09944764C6F" xlink:type="arc" />
    <link:label id="lab_us-gaap_CededCreditRiskReinsurerDomain_B9BB24F5811B41588F76816F5B42877E_terseLabel_en-US" xlink:label="lab_us-gaap_CededCreditRiskReinsurerDomain_11D31BE4D2BA56F7BED2C42EFF129FB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ceded Credit Risk, Reinsurer [Domain]</link:label>
    <link:label id="lab_us-gaap_CededCreditRiskReinsurerDomain_B9BB24F5811B41588F76816F5B42877E_label_en-US" xlink:label="lab_us-gaap_CededCreditRiskReinsurerDomain_11D31BE4D2BA56F7BED2C42EFF129FB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ceded Credit Risk, Reinsurer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CededCreditRiskReinsurerDomain" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_11D31BE4D2BA56F7BED2C42EFF129FB2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_11D31BE4D2BA56F7BED2C42EFF129FB2" xlink:to="lab_us-gaap_CededCreditRiskReinsurerDomain_11D31BE4D2BA56F7BED2C42EFF129FB2" xlink:type="arc" />
    <link:label id="lab_sigi_NationalFloodInsuranceProgramMember_39A040C967D34C04452E816F5B4291BD_terseLabel_en-US" xlink:label="lab_sigi_NationalFloodInsuranceProgramMember_79A1A290A19F53A9B249EC29016C3640" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">National Flood Insurance Program [Member]</link:label>
    <link:label id="lab_sigi_NationalFloodInsuranceProgramMember_39A040C967D34C04452E816F5B4291BD_label_en-US" xlink:label="lab_sigi_NationalFloodInsuranceProgramMember_79A1A290A19F53A9B249EC29016C3640" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">National Flood Insurance Program [Member]</link:label>
    <link:label id="lab_sigi_NationalFloodInsuranceProgramMember_39A040C967D34C04452E816F5B4291BD_documentation_en-US" xlink:label="lab_sigi_NationalFloodInsuranceProgramMember_79A1A290A19F53A9B249EC29016C3640" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance policies issued and serviced by the Company which provide coverage for losses due to flood.  All premiums, losses and loss expenses are ceded to the federal government through its National Flood Insurance Program for such policies.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NationalFloodInsuranceProgramMember" xlink:label="loc_sigi_NationalFloodInsuranceProgramMember_79A1A290A19F53A9B249EC29016C3640" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NationalFloodInsuranceProgramMember_79A1A290A19F53A9B249EC29016C3640" xlink:to="lab_sigi_NationalFloodInsuranceProgramMember_79A1A290A19F53A9B249EC29016C3640" xlink:type="arc" />
    <link:label id="lab_sigi_NjUnsatisfiedClaimJudgmentFundMember_A3FBC37EBDD4C07A50EF816F5B426D6E_terseLabel_en-US" xlink:label="lab_sigi_NjUnsatisfiedClaimJudgmentFundMember_A93794BDE5A0541AA174831D2015226F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NJ Unsatisfied Claim Judgment Fund [Member]</link:label>
    <link:label id="lab_sigi_NjUnsatisfiedClaimJudgmentFundMember_A3FBC37EBDD4C07A50EF816F5B426D6E_label_en-US" xlink:label="lab_sigi_NjUnsatisfiedClaimJudgmentFundMember_A93794BDE5A0541AA174831D2015226F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nj Unsatisfied Claim Judgment Fund [Member]</link:label>
    <link:label id="lab_sigi_NjUnsatisfiedClaimJudgmentFundMember_A3FBC37EBDD4C07A50EF816F5B426D6E_documentation_en-US" xlink:label="lab_sigi_NjUnsatisfiedClaimJudgmentFundMember_A93794BDE5A0541AA174831D2015226F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents NJ Unsatisfied Claim Judgment Fund state pool.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NjUnsatisfiedClaimJudgmentFundMember" xlink:label="loc_sigi_NjUnsatisfiedClaimJudgmentFundMember_A93794BDE5A0541AA174831D2015226F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NjUnsatisfiedClaimJudgmentFundMember_A93794BDE5A0541AA174831D2015226F" xlink:to="lab_sigi_NjUnsatisfiedClaimJudgmentFundMember_A93794BDE5A0541AA174831D2015226F" xlink:type="arc" />
    <link:label id="lab_sigi_OtherFederalAndStatePoolsMember_8166AA37FA9B65F1D891816F5B426955_terseLabel_en-US" xlink:label="lab_sigi_OtherFederalAndStatePoolsMember_7AE4BE6E484450CC8317490462F87E7E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Federal And State Pools [Member]</link:label>
    <link:label id="lab_sigi_OtherFederalAndStatePoolsMember_8166AA37FA9B65F1D891816F5B426955_label_en-US" xlink:label="lab_sigi_OtherFederalAndStatePoolsMember_7AE4BE6E484450CC8317490462F87E7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Federal And State Pools [Member]</link:label>
    <link:label id="lab_sigi_OtherFederalAndStatePoolsMember_8166AA37FA9B65F1D891816F5B426955_documentation_en-US" xlink:label="lab_sigi_OtherFederalAndStatePoolsMember_7AE4BE6E484450CC8317490462F87E7E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents federal and state pools not otherwise mentioned.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherFederalAndStatePoolsMember" xlink:label="loc_sigi_OtherFederalAndStatePoolsMember_7AE4BE6E484450CC8317490462F87E7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherFederalAndStatePoolsMember_7AE4BE6E484450CC8317490462F87E7E" xlink:to="lab_sigi_OtherFederalAndStatePoolsMember_7AE4BE6E484450CC8317490462F87E7E" xlink:type="arc" />
    <link:label id="lab_sigi_TotalFederalAndStatePoolsMember_5F93CBFC9BEB37919703816F5B4248D8_terseLabel_en-US" xlink:label="lab_sigi_TotalFederalAndStatePoolsMember_BD6113E3330A5ACEB31337BB47F7BA92" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Federal And State Pools [Member]</link:label>
    <link:label id="lab_sigi_TotalFederalAndStatePoolsMember_5F93CBFC9BEB37919703816F5B4248D8_label_en-US" xlink:label="lab_sigi_TotalFederalAndStatePoolsMember_BD6113E3330A5ACEB31337BB47F7BA92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Federal And State Pools [Member]</link:label>
    <link:label id="lab_sigi_TotalFederalAndStatePoolsMember_5F93CBFC9BEB37919703816F5B4248D8_documentation_en-US" xlink:label="lab_sigi_TotalFederalAndStatePoolsMember_BD6113E3330A5ACEB31337BB47F7BA92" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the total federal and state pools.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalFederalAndStatePoolsMember" xlink:label="loc_sigi_TotalFederalAndStatePoolsMember_BD6113E3330A5ACEB31337BB47F7BA92" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalFederalAndStatePoolsMember_BD6113E3330A5ACEB31337BB47F7BA92" xlink:to="lab_sigi_TotalFederalAndStatePoolsMember_BD6113E3330A5ACEB31337BB47F7BA92" xlink:type="arc" />
    <link:label id="lab_sigi_RemainingUnsecuredReinsuranceMember_A09AF4821EDF6DE2CA6F816F5B4260C0_terseLabel_en-US" xlink:label="lab_sigi_RemainingUnsecuredReinsuranceMember_DF7CAF72244C57C8B8C95C82E6BE135D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining Unsecured Reinsurance [Member]</link:label>
    <link:label id="lab_sigi_RemainingUnsecuredReinsuranceMember_A09AF4821EDF6DE2CA6F816F5B4260C0_label_en-US" xlink:label="lab_sigi_RemainingUnsecuredReinsuranceMember_DF7CAF72244C57C8B8C95C82E6BE135D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Remaining Unsecured Reinsurance [Member]</link:label>
    <link:label id="lab_sigi_RemainingUnsecuredReinsuranceMember_A09AF4821EDF6DE2CA6F816F5B4260C0_documentation_en-US" xlink:label="lab_sigi_RemainingUnsecuredReinsuranceMember_DF7CAF72244C57C8B8C95C82E6BE135D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the net unsecured reinsurance balance less all federal and state pools.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RemainingUnsecuredReinsuranceMember" xlink:label="loc_sigi_RemainingUnsecuredReinsuranceMember_DF7CAF72244C57C8B8C95C82E6BE135D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RemainingUnsecuredReinsuranceMember_DF7CAF72244C57C8B8C95C82E6BE135D" xlink:to="lab_sigi_RemainingUnsecuredReinsuranceMember_DF7CAF72244C57C8B8C95C82E6BE135D" xlink:type="arc" />
    <link:label id="lab_sigi_MunichReGroupMember_FE54009FB60901D146A2816F5B42E0AC_terseLabel_en-US" xlink:label="lab_sigi_MunichReGroupMember_B82D2025777C5D7CB81A004F7B7B5CB1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Munich Re Group [Member]</link:label>
    <link:label id="lab_sigi_MunichReGroupMember_FE54009FB60901D146A2816F5B42E0AC_label_en-US" xlink:label="lab_sigi_MunichReGroupMember_B82D2025777C5D7CB81A004F7B7B5CB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Munich Re Group [Member]</link:label>
    <link:label id="lab_sigi_MunichReGroupMember_FE54009FB60901D146A2816F5B42E0AC_documentation_en-US" xlink:label="lab_sigi_MunichReGroupMember_B82D2025777C5D7CB81A004F7B7B5CB1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents Munich Re Group.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MunichReGroupMember" xlink:label="loc_sigi_MunichReGroupMember_B82D2025777C5D7CB81A004F7B7B5CB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MunichReGroupMember_B82D2025777C5D7CB81A004F7B7B5CB1" xlink:to="lab_sigi_MunichReGroupMember_B82D2025777C5D7CB81A004F7B7B5CB1" xlink:type="arc" />
    <link:label id="lab_sigi_HanoverRuckversicherungsAgMember_924C6B7A15556E41776F816F5B423395_terseLabel_en-US" xlink:label="lab_sigi_HanoverRuckversicherungsAgMember_BECBC57D33195CA6982C9906D545A096" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hanover Ruckversicherungs AG [Member]</link:label>
    <link:label id="lab_sigi_HanoverRuckversicherungsAgMember_924C6B7A15556E41776F816F5B423395_label_en-US" xlink:label="lab_sigi_HanoverRuckversicherungsAgMember_BECBC57D33195CA6982C9906D545A096" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hanover Ruckversicherungs Ag [Member]</link:label>
    <link:label id="lab_sigi_HanoverRuckversicherungsAgMember_924C6B7A15556E41776F816F5B423395_documentation_en-US" xlink:label="lab_sigi_HanoverRuckversicherungsAgMember_BECBC57D33195CA6982C9906D545A096" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents Hanover Ruckversicherungs AG.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_HanoverRuckversicherungsAgMember" xlink:label="loc_sigi_HanoverRuckversicherungsAgMember_BECBC57D33195CA6982C9906D545A096" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_HanoverRuckversicherungsAgMember_BECBC57D33195CA6982C9906D545A096" xlink:to="lab_sigi_HanoverRuckversicherungsAgMember_BECBC57D33195CA6982C9906D545A096" xlink:type="arc" />
    <link:label id="lab_sigi_AxisReinsuranceCompanyMember_27F4CDCB33D5315EC9C8816F5B4254F9_terseLabel_en-US" xlink:label="lab_sigi_AxisReinsuranceCompanyMember_429BA6F8CE10536DA58E1DE6F729DF2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AXIS Reinsurance Company [Member]</link:label>
    <link:label id="lab_sigi_AxisReinsuranceCompanyMember_27F4CDCB33D5315EC9C8816F5B4254F9_label_en-US" xlink:label="lab_sigi_AxisReinsuranceCompanyMember_429BA6F8CE10536DA58E1DE6F729DF2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Axis Reinsurance Company [Member]</link:label>
    <link:label id="lab_sigi_AxisReinsuranceCompanyMember_27F4CDCB33D5315EC9C8816F5B4254F9_documentation_en-US" xlink:label="lab_sigi_AxisReinsuranceCompanyMember_429BA6F8CE10536DA58E1DE6F729DF2D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents AXIS Reinsurance Company.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AxisReinsuranceCompanyMember" xlink:label="loc_sigi_AxisReinsuranceCompanyMember_429BA6F8CE10536DA58E1DE6F729DF2D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AxisReinsuranceCompanyMember_429BA6F8CE10536DA58E1DE6F729DF2D" xlink:to="lab_sigi_AxisReinsuranceCompanyMember_429BA6F8CE10536DA58E1DE6F729DF2D" xlink:type="arc" />
    <link:label id="lab_sigi_SwissReGroupMember_D08235A5DCB2A27462A6816F5B42290D_terseLabel_en-US" xlink:label="lab_sigi_SwissReGroupMember_350F2060A99E585287B0DEBD5EF97465" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Swiss Re Group [Member]</link:label>
    <link:label id="lab_sigi_SwissReGroupMember_D08235A5DCB2A27462A6816F5B42290D_label_en-US" xlink:label="lab_sigi_SwissReGroupMember_350F2060A99E585287B0DEBD5EF97465" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Swiss Re Group [Member]</link:label>
    <link:label id="lab_sigi_SwissReGroupMember_D08235A5DCB2A27462A6816F5B42290D_documentation_en-US" xlink:label="lab_sigi_SwissReGroupMember_350F2060A99E585287B0DEBD5EF97465" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents Swiss Re Group.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SwissReGroupMember" xlink:label="loc_sigi_SwissReGroupMember_350F2060A99E585287B0DEBD5EF97465" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SwissReGroupMember_350F2060A99E585287B0DEBD5EF97465" xlink:to="lab_sigi_SwissReGroupMember_350F2060A99E585287B0DEBD5EF97465" xlink:type="arc" />
    <link:label id="lab_sigi_PartnerReinsuranceCompanyOfUsMember_798C37C58CB66264233C816F5B424BE0_terseLabel_en-US" xlink:label="lab_sigi_PartnerReinsuranceCompanyOfUsMember_525D72C9A27E526999B76D447D87C4EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Partner Reinsurance Company Of The US [Member]</link:label>
    <link:label id="lab_sigi_PartnerReinsuranceCompanyOfUsMember_798C37C58CB66264233C816F5B424BE0_label_en-US" xlink:label="lab_sigi_PartnerReinsuranceCompanyOfUsMember_525D72C9A27E526999B76D447D87C4EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Partner Reinsurance Company Of Us [Member]</link:label>
    <link:label id="lab_sigi_PartnerReinsuranceCompanyOfUsMember_798C37C58CB66264233C816F5B424BE0_documentation_en-US" xlink:label="lab_sigi_PartnerReinsuranceCompanyOfUsMember_525D72C9A27E526999B76D447D87C4EB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents Partner Reinsurance Company of the U.S.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PartnerReinsuranceCompanyOfUsMember" xlink:label="loc_sigi_PartnerReinsuranceCompanyOfUsMember_525D72C9A27E526999B76D447D87C4EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PartnerReinsuranceCompanyOfUsMember_525D72C9A27E526999B76D447D87C4EB" xlink:to="lab_sigi_PartnerReinsuranceCompanyOfUsMember_525D72C9A27E526999B76D447D87C4EB" xlink:type="arc" />
    <link:label id="lab_sigi_AllOtherReinsurersMember_02DCB2E8877FF6405CE2816F5B420A69_terseLabel_en-US" xlink:label="lab_sigi_AllOtherReinsurersMember_5005BD1A72545DC186995238F8B2BF7A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Other Reinsurers [Member]</link:label>
    <link:label id="lab_sigi_AllOtherReinsurersMember_02DCB2E8877FF6405CE2816F5B420A69_label_en-US" xlink:label="lab_sigi_AllOtherReinsurersMember_5005BD1A72545DC186995238F8B2BF7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Other Reinsurers [Member]</link:label>
    <link:label id="lab_sigi_AllOtherReinsurersMember_02DCB2E8877FF6405CE2816F5B420A69_documentation_en-US" xlink:label="lab_sigi_AllOtherReinsurersMember_5005BD1A72545DC186995238F8B2BF7A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents all other reinsurers not otherwise mentioned.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AllOtherReinsurersMember" xlink:label="loc_sigi_AllOtherReinsurersMember_5005BD1A72545DC186995238F8B2BF7A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AllOtherReinsurersMember_5005BD1A72545DC186995238F8B2BF7A" xlink:to="lab_sigi_AllOtherReinsurersMember_5005BD1A72545DC186995238F8B2BF7A" xlink:type="arc" />
    <link:label id="lab_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_B295250830B742F6C53E816F5B422528_terseLabel_en-US" xlink:label="lab_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_FF3D739DE16B509AAED775B7EF1A3A8E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining Unsecured Reinsurance, Net of Collateral [Member]</link:label>
    <link:label id="lab_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_B295250830B742F6C53E816F5B422528_label_en-US" xlink:label="lab_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_FF3D739DE16B509AAED775B7EF1A3A8E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Remaining Unsecured Reinsurance, Net of Collateral [Member]</link:label>
    <link:label id="lab_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_B295250830B742F6C53E816F5B422528_documentation_en-US" xlink:label="lab_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_FF3D739DE16B509AAED775B7EF1A3A8E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the net unsecured reinsurance balance less all federal and state pools, and collateral.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RemainingUnsecuredReinsuranceNetofCollateralMember" xlink:label="loc_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_FF3D739DE16B509AAED775B7EF1A3A8E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_FF3D739DE16B509AAED775B7EF1A3A8E" xlink:to="lab_sigi_RemainingUnsecuredReinsuranceNetofCollateralMember_FF3D739DE16B509AAED775B7EF1A3A8E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForReinsuranceRecoverableMember_29180313636C1A709CE7816F5B42D11C_terseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForReinsuranceRecoverableMember_A6F27E59BE6C584C9F865F6B7CC7CBC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for Reinsurance Recoverable [Member]</link:label>
    <link:label id="lab_us-gaap_AllowanceForReinsuranceRecoverableMember_29180313636C1A709CE7816F5B42D11C_label_en-US" xlink:label="lab_us-gaap_AllowanceForReinsuranceRecoverableMember_A6F27E59BE6C584C9F865F6B7CC7CBC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance for Reinsurance Recoverable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllowanceForReinsuranceRecoverableMember" xlink:label="loc_us-gaap_AllowanceForReinsuranceRecoverableMember_A6F27E59BE6C584C9F865F6B7CC7CBC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForReinsuranceRecoverableMember_A6F27E59BE6C584C9F865F6B7CC7CBC9" xlink:to="lab_us-gaap_AllowanceForReinsuranceRecoverableMember_A6F27E59BE6C584C9F865F6B7CC7CBC9" xlink:type="arc" />
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_F2312C744791F8A0891D816F5B42A40D_terseLabel_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_6942F1AF012D50CA862708B2C88B3C87" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Companys Estimated Deductible</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_F2312C744791F8A0891D816F5B42A40D_label_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_6942F1AF012D50CA862708B2C88B3C87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Companys Estimated Deductible</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_F2312C744791F8A0891D816F5B42A40D_documentation_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_6942F1AF012D50CA862708B2C88B3C87" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Company's estimated deductible for the year following the date of this report under the Terrorism Risk Insurance Program.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible" xlink:label="loc_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_6942F1AF012D50CA862708B2C88B3C87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_6942F1AF012D50CA862708B2C88B3C87" xlink:to="lab_sigi_TerrorismRiskInsuranceProgramCompanysEstimatedDeductible_6942F1AF012D50CA862708B2C88B3C87" xlink:type="arc" />
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_A07CD8D163B8EFC5771C816F5B420EB6_terseLabel_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_7AAE615301D558C9840D39D22F649964" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Reimbursed Percentage Maximum</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_A07CD8D163B8EFC5771C816F5B420EB6_label_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_7AAE615301D558C9840D39D22F649964" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Reimbursed Percentage Maximum</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_A07CD8D163B8EFC5771C816F5B420EB6_documentation_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_7AAE615301D558C9840D39D22F649964" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage of subject losses, after an insurer deductible, subject to an annual cap, reimbursed by the Federal Government under the Terrorism Risk Insurance Program, beginning the next calendar year.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum" xlink:label="loc_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_7AAE615301D558C9840D39D22F649964" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_7AAE615301D558C9840D39D22F649964" xlink:to="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMaximum_7AAE615301D558C9840D39D22F649964" xlink:type="arc" />
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramAnnualCap_3BE60B4DC289B61DDB34816F5B42EF82_terseLabel_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramAnnualCap_B0B1CD879822590F85C28652F5E02A27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Annual Cap</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramAnnualCap_3BE60B4DC289B61DDB34816F5B42EF82_label_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramAnnualCap_B0B1CD879822590F85C28652F5E02A27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Annual Cap</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramAnnualCap_3BE60B4DC289B61DDB34816F5B42EF82_documentation_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramAnnualCap_B0B1CD879822590F85C28652F5E02A27" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The annual cap limiting the amount of aggregate subject losses for participating insurers under the Terrorism Risk Insurance Program.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TerrorismRiskInsuranceProgramAnnualCap" xlink:label="loc_sigi_TerrorismRiskInsuranceProgramAnnualCap_B0B1CD879822590F85C28652F5E02A27" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TerrorismRiskInsuranceProgramAnnualCap_B0B1CD879822590F85C28652F5E02A27" xlink:to="lab_sigi_TerrorismRiskInsuranceProgramAnnualCap_B0B1CD879822590F85C28652F5E02A27" xlink:type="arc" />
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_1A1D364BA48F4B91D2A5816F5B42E955_terseLabel_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_B8DDE14350AA569288A2CA466AC0A652" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Insurer Retainer</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_1A1D364BA48F4B91D2A5816F5B42E955_label_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_B8DDE14350AA569288A2CA466AC0A652" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Insurer Retainer</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_1A1D364BA48F4B91D2A5816F5B42E955_documentation_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_B8DDE14350AA569288A2CA466AC0A652" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage that the insured has to pay for losses under the Terrorism Risk Insurance Program, beginning the next calendar year.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TerrorismRiskInsuranceProgramInsurerRetainer" xlink:label="loc_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_B8DDE14350AA569288A2CA466AC0A652" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_B8DDE14350AA569288A2CA466AC0A652" xlink:to="lab_sigi_TerrorismRiskInsuranceProgramInsurerRetainer_B8DDE14350AA569288A2CA466AC0A652" xlink:type="arc" />
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_EC272AB64B5C541B9DC7816F5B422CD9_terseLabel_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_80A277756E935E6B847FBF061465485C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Annual Terrorism Risk Insurance Program Federal Share Reduction</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_EC272AB64B5C541B9DC7816F5B422CD9_label_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_80A277756E935E6B847FBF061465485C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Federal Share Reduction</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_EC272AB64B5C541B9DC7816F5B422CD9_documentation_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_80A277756E935E6B847FBF061465485C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The annual percentage decrease of aggregate subject losses reimbursed by the Federal Government under the Terrorism Risk Insurance Program.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TerrorismRiskInsuranceProgramFederalShareReduction" xlink:label="loc_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_80A277756E935E6B847FBF061465485C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_80A277756E935E6B847FBF061465485C" xlink:to="lab_sigi_TerrorismRiskInsuranceProgramFederalShareReduction_80A277756E935E6B847FBF061465485C" xlink:type="arc" />
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_BFD640D10187B8583D54816F5B426B5C_terseLabel_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_CDF75BE0B1195356BFB09A583B384CA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Reimbursed Percentage Minimum</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_BFD640D10187B8583D54816F5B426B5C_label_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_CDF75BE0B1195356BFB09A583B384CA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Terrorism Risk Insurance Program Reimbursed Percentage Minimum</link:label>
    <link:label id="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_BFD640D10187B8583D54816F5B426B5C_documentation_en-US" xlink:label="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_CDF75BE0B1195356BFB09A583B384CA6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The ultimate percentage of subject losses, after an insurer deductible, subject to an annual cap, reimbursed by the Federal Government under the Terrorism Risk Insurance Program by 2020.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum" xlink:label="loc_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_CDF75BE0B1195356BFB09A583B384CA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_CDF75BE0B1195356BFB09A583B384CA6" xlink:to="lab_sigi_TerrorismRiskInsuranceProgramReimbursedPercentageMinimum_CDF75BE0B1195356BFB09A583B384CA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesBalance_F8D8C3107E319BC7DE22816F5B420E98_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesBalance_B477ED00FB2F5035875CC0B1B528C20B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance For Reinsurance Recoverable</link:label>
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesBalance_F8D8C3107E319BC7DE22816F5B420E98_label_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesBalance_B477ED00FB2F5035875CC0B1B528C20B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Allowances and Reserves, Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_B477ED00FB2F5035875CC0B1B528C20B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesBalance_B477ED00FB2F5035875CC0B1B528C20B" xlink:to="lab_us-gaap_ValuationAllowancesAndReservesBalance_B477ED00FB2F5035875CC0B1B528C20B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceRecoverables_53976F5762F504A6ABC5816F5B42D0DC_verboseLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverables_482AFD3BA1CC5AED937234C2B9A2ABC5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total reinsurance recoverables</link:label>
    <link:label id="lab_us-gaap_ReinsuranceRecoverables_53976F5762F504A6ABC5816F5B42D0DC_label_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverables_482AFD3BA1CC5AED937234C2B9A2ABC5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reinsurance Recoverables, Including Reinsurance Premium Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceRecoverables" xlink:label="loc_us-gaap_ReinsuranceRecoverables_482AFD3BA1CC5AED937234C2B9A2ABC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceRecoverables_482AFD3BA1CC5AED937234C2B9A2ABC5" xlink:to="lab_us-gaap_ReinsuranceRecoverables_482AFD3BA1CC5AED937234C2B9A2ABC5" xlink:type="arc" />
    <link:label id="lab_us-gaap_PrepaidReinsurancePremiums_D8AA53C6FC8878A2B090816F5B425781_verboseLabel_en-US" xlink:label="lab_us-gaap_PrepaidReinsurancePremiums_32EA0EC71072558F87737E50DA838C88" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total prepaid reinsurance premiums</link:label>
    <link:label id="lab_us-gaap_PrepaidReinsurancePremiums_D8AA53C6FC8878A2B090816F5B425781_label_en-US" xlink:label="lab_us-gaap_PrepaidReinsurancePremiums_32EA0EC71072558F87737E50DA838C88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prepaid Reinsurance Premiums</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrepaidReinsurancePremiums" xlink:label="loc_us-gaap_PrepaidReinsurancePremiums_32EA0EC71072558F87737E50DA838C88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidReinsurancePremiums_32EA0EC71072558F87737E50DA838C88" xlink:to="lab_us-gaap_PrepaidReinsurancePremiums_32EA0EC71072558F87737E50DA838C88" xlink:type="arc" />
    <link:label id="lab_sigi_RemainingReinsuranceBalances_30F4D8DA81E87DC4830C816F5B42432E_totalLabel_en-US" xlink:label="lab_sigi_RemainingReinsuranceBalances_9CB55A83B44450E5942262DA27A5074E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unsecured reinsurance balances</link:label>
    <link:label id="lab_sigi_RemainingReinsuranceBalances_30F4D8DA81E87DC4830C816F5B42432E_label_en-US" xlink:label="lab_sigi_RemainingReinsuranceBalances_9CB55A83B44450E5942262DA27A5074E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Remaining Reinsurance Balances</link:label>
    <link:label id="lab_sigi_RemainingReinsuranceBalances_30F4D8DA81E87DC4830C816F5B42432E_documentation_en-US" xlink:label="lab_sigi_RemainingReinsuranceBalances_9CB55A83B44450E5942262DA27A5074E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the known and estimated amount of reinsurance recoverables and the unexpired portion of premiums ceded on policies in force, less all federal and state pools, as of the balance sheet date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RemainingReinsuranceBalances" xlink:label="loc_sigi_RemainingReinsuranceBalances_9CB55A83B44450E5942262DA27A5074E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RemainingReinsuranceBalances_9CB55A83B44450E5942262DA27A5074E" xlink:to="lab_sigi_RemainingReinsuranceBalances_9CB55A83B44450E5942262DA27A5074E" xlink:type="arc" />
    <link:label id="lab_sigi_CollateralOfReinsuranceRecoverables_6E2CEE75203C7BCE28A1816F5B423D1C_negatedLabel_en-US" xlink:label="lab_sigi_CollateralOfReinsuranceRecoverables_22AF5B27B12D5847B63171BF6F8F3282" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less: collateral</link:label>
    <link:label id="lab_sigi_CollateralOfReinsuranceRecoverables_6E2CEE75203C7BCE28A1816F5B423D1C_label_en-US" xlink:label="lab_sigi_CollateralOfReinsuranceRecoverables_22AF5B27B12D5847B63171BF6F8F3282" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateral Of Reinsurance Recoverables</link:label>
    <link:label id="lab_sigi_CollateralOfReinsuranceRecoverables_6E2CEE75203C7BCE28A1816F5B423D1C_documentation_en-US" xlink:label="lab_sigi_CollateralOfReinsuranceRecoverables_22AF5B27B12D5847B63171BF6F8F3282" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the amount collateralized by the entity's reinsurers. The amount includes letters of credit, trust funds, and funds withheld.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_CollateralOfReinsuranceRecoverables" xlink:label="loc_sigi_CollateralOfReinsuranceRecoverables_22AF5B27B12D5847B63171BF6F8F3282" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_CollateralOfReinsuranceRecoverables_22AF5B27B12D5847B63171BF6F8F3282" xlink:to="lab_sigi_CollateralOfReinsuranceRecoverables_22AF5B27B12D5847B63171BF6F8F3282" xlink:type="arc" />
    <link:label id="lab_sigi_PercentageOfNetUnsecuredReinsurance_5E027C5A80FF7688AB10816F5B42C625_terseLabel_en-US" xlink:label="lab_sigi_PercentageOfNetUnsecuredReinsurance_070A01DEEEE450E29BD3F15CEE90696F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">% of Net Unsecured Reinsurance</link:label>
    <link:label id="lab_sigi_PercentageOfNetUnsecuredReinsurance_5E027C5A80FF7688AB10816F5B42C625_label_en-US" xlink:label="lab_sigi_PercentageOfNetUnsecuredReinsurance_070A01DEEEE450E29BD3F15CEE90696F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Of Net Unsecured Reinsurance</link:label>
    <link:label id="lab_sigi_PercentageOfNetUnsecuredReinsurance_5E027C5A80FF7688AB10816F5B42C625_documentation_en-US" xlink:label="lab_sigi_PercentageOfNetUnsecuredReinsurance_070A01DEEEE450E29BD3F15CEE90696F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the percentage of the total net unsecured reinsurance balance.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PercentageOfNetUnsecuredReinsurance" xlink:label="loc_sigi_PercentageOfNetUnsecuredReinsurance_070A01DEEEE450E29BD3F15CEE90696F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PercentageOfNetUnsecuredReinsurance_070A01DEEEE450E29BD3F15CEE90696F" xlink:to="lab_sigi_PercentageOfNetUnsecuredReinsurance_070A01DEEEE450E29BD3F15CEE90696F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_B249607C0311841EFAB2A04F73495A42_terseLabel_en-US" xlink:label="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_FC6EA24954E554FA89A68EB632E398DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]</link:label>
    <link:label id="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_B249607C0311841EFAB2A04F73495A42_label_en-US" xlink:label="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_FC6EA24954E554FA89A68EB632E398DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_FC6EA24954E554FA89A68EB632E398DF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_FC6EA24954E554FA89A68EB632E398DF" xlink:to="lab_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_FC6EA24954E554FA89A68EB632E398DF" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingSegmentsMember_C5894118F264FBC5A551A04F7349C174_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember_EAFA574D79A5543FACFFA8DC22302F75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Segments [Member]</link:label>
    <link:label id="lab_us-gaap_OperatingSegmentsMember_C5894118F264FBC5A551A04F7349C174_label_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember_EAFA574D79A5543FACFFA8DC22302F75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Segments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_EAFA574D79A5543FACFFA8DC22302F75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingSegmentsMember_EAFA574D79A5543FACFFA8DC22302F75" xlink:to="lab_us-gaap_OperatingSegmentsMember_EAFA574D79A5543FACFFA8DC22302F75" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_73AB98D5B80A7C079E99A04F7349DB97_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_AAF1A9EA122A594EBED67811D048BEAD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</link:label>
    <link:label id="lab_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_73AB98D5B80A7C079E99A04F7349DB97_label_en-US" xlink:label="lab_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_AAF1A9EA122A594EBED67811D048BEAD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:label="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_AAF1A9EA122A594EBED67811D048BEAD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_AAF1A9EA122A594EBED67811D048BEAD" xlink:to="lab_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_AAF1A9EA122A594EBED67811D048BEAD" xlink:type="arc" />
    <link:label id="lab_sigi_TotalInvestmentRevenues_BDEFA917D85612341383A04F7349B235_terseLabel_en-US" xlink:label="lab_sigi_TotalInvestmentRevenues_BC522AC1A29A505D98D61C06E23B79AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total investment revenues</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalInvestmentRevenues" xlink:label="loc_sigi_TotalInvestmentRevenues_BC522AC1A29A505D98D61C06E23B79AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalInvestmentRevenues_BC522AC1A29A505D98D61C06E23B79AD" xlink:to="lab_sigi_TotalInvestmentRevenues_BC522AC1A29A505D98D61C06E23B79AD" xlink:type="arc" />
    <link:label id="lab_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_CFE7D21DF0B33C22CE80A04F73491040_terseLabel_en-US" xlink:label="lab_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_5C3A68B6DB4B57BCAE367AC3F0CA9333" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total all segments</link:label>
    <link:label id="lab_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_CFE7D21DF0B33C22CE80A04F73491040_label_en-US" xlink:label="lab_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_5C3A68B6DB4B57BCAE367AC3F0CA9333" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Segment Income Loss From Continuing Operations Before Federal Income Tax</link:label>
    <link:label id="lab_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_CFE7D21DF0B33C22CE80A04F73491040_documentation_en-US" xlink:label="lab_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_5C3A68B6DB4B57BCAE367AC3F0CA9333" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total of all reportable segments' income or loss from continuing operations, before federal income taxes.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax" xlink:label="loc_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_5C3A68B6DB4B57BCAE367AC3F0CA9333" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_5C3A68B6DB4B57BCAE367AC3F0CA9333" xlink:to="lab_sigi_TotalSegmentIncomeLossFromContinuingOperationsBeforeFederalIncomeTax_5C3A68B6DB4B57BCAE367AC3F0CA9333" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseDebt_2C776F5578B245EA3359A04F7349C7BD_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseDebt_3018274E69EC5681B9343794F7BF3B29" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Interest expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:label="loc_us-gaap_InterestExpenseDebt_3018274E69EC5681B9343794F7BF3B29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseDebt_3018274E69EC5681B9343794F7BF3B29" xlink:to="lab_us-gaap_InterestExpenseDebt_3018274E69EC5681B9343794F7BF3B29" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingCostsAndExpenses_31DD31687A97258E3F15A08FD12532A7_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OperatingCostsAndExpenses_387BE1F48D60544FB5E2D04C3A75AD44" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Corporate expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingCostsAndExpenses" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_387BE1F48D60544FB5E2D04C3A75AD44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingCostsAndExpenses_387BE1F48D60544FB5E2D04C3A75AD44" xlink:to="lab_us-gaap_OperatingCostsAndExpenses_387BE1F48D60544FB5E2D04C3A75AD44" xlink:type="arc" />
    <link:label id="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_127EA27AB96079C25123816F5A686A2F_label_en-US" xlink:label="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_F1EC6F41A45C5213AD80E3528B5B99B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retirement Benefits [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_F1EC6F41A45C5213AD80E3528B5B99B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_F1EC6F41A45C5213AD80E3528B5B99B1" xlink:to="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_F1EC6F41A45C5213AD80E3528B5B99B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_CE4EFD547B7AFFD1B125816F5A77FE06_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_B2BE4C2CBB065B09B1D428ABB1E05565" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Defined Benefit Plans Disclosures [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_CE4EFD547B7AFFD1B125816F5A77FE06_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_B2BE4C2CBB065B09B1D428ABB1E05565" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Defined Benefit Plans Disclosures [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_B2BE4C2CBB065B09B1D428ABB1E05565" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_B2BE4C2CBB065B09B1D428ABB1E05565" xlink:to="lab_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_B2BE4C2CBB065B09B1D428ABB1E05565" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_081D988A93EC612521BE816F5A7795DD_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_BC330975CAA252319C751A715B5061E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Asset Categories [Axis]</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_081D988A93EC612521BE816F5A7795DD_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_BC330975CAA252319C751A715B5061E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Asset Categories [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_BC330975CAA252319C751A715B5061E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_BC330975CAA252319C751A715B5061E8" xlink:to="lab_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_BC330975CAA252319C751A715B5061E8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PlanAssetCategoriesDomain_32D52D5EC82982054070816F5A77EF28_terseLabel_en-US" xlink:label="lab_us-gaap_PlanAssetCategoriesDomain_8DB53E5EC68B5ADF81791B947FCA9850" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan Asset Categories [Domain]</link:label>
    <link:label id="lab_us-gaap_PlanAssetCategoriesDomain_32D52D5EC82982054070816F5A77EF28_label_en-US" xlink:label="lab_us-gaap_PlanAssetCategoriesDomain_8DB53E5EC68B5ADF81791B947FCA9850" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan Asset Categories [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_8DB53E5EC68B5ADF81791B947FCA9850" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_8DB53E5EC68B5ADF81791B947FCA9850" xlink:to="lab_us-gaap_PlanAssetCategoriesDomain_8DB53E5EC68B5ADF81791B947FCA9850" xlink:type="arc" />
    <link:label id="lab_sigi_GlobalAssetAllocationFundMember_14444402A8DFD1D804B1816F5A77DD0C_terseLabel_en-US" xlink:label="lab_sigi_GlobalAssetAllocationFundMember_6B70069D92155462825FEDB5A36D0AFD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Global Asset Allocation Fund [Member]</link:label>
    <link:label id="lab_sigi_GlobalAssetAllocationFundMember_14444402A8DFD1D804B1816F5A77DD0C_label_en-US" xlink:label="lab_sigi_GlobalAssetAllocationFundMember_6B70069D92155462825FEDB5A36D0AFD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Global Asset Allocation Fund [Member]</link:label>
    <link:label id="lab_sigi_GlobalAssetAllocationFundMember_14444402A8DFD1D804B1816F5A77DD0C_documentation_en-US" xlink:label="lab_sigi_GlobalAssetAllocationFundMember_6B70069D92155462825FEDB5A36D0AFD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mutual fund portfolio of global stocks and bonds</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_GlobalAssetAllocationFundMember" xlink:label="loc_sigi_GlobalAssetAllocationFundMember_6B70069D92155462825FEDB5A36D0AFD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_GlobalAssetAllocationFundMember_6B70069D92155462825FEDB5A36D0AFD" xlink:to="lab_sigi_GlobalAssetAllocationFundMember_6B70069D92155462825FEDB5A36D0AFD" xlink:type="arc" />
    <link:label id="lab_sigi_ExtendedDurationFixedIncomeMember_B1AA6B962F33E7132695816F5A77335F_terseLabel_en-US" xlink:label="lab_sigi_ExtendedDurationFixedIncomeMember_9F1AB5B34E3556209A4E9E46647DD7DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Extended Duration Fixed Income [Member]</link:label>
    <link:label id="lab_sigi_ExtendedDurationFixedIncomeMember_B1AA6B962F33E7132695816F5A77335F_label_en-US" xlink:label="lab_sigi_ExtendedDurationFixedIncomeMember_9F1AB5B34E3556209A4E9E46647DD7DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Extended Duration Fixed Income [Member]</link:label>
    <link:label id="lab_sigi_ExtendedDurationFixedIncomeMember_B1AA6B962F33E7132695816F5A77335F_documentation_en-US" xlink:label="lab_sigi_ExtendedDurationFixedIncomeMember_9F1AB5B34E3556209A4E9E46647DD7DB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Provides exposure to the longest available duration physical securities and will provide significant interest rate duration coverage.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ExtendedDurationFixedIncomeMember" xlink:label="loc_sigi_ExtendedDurationFixedIncomeMember_9F1AB5B34E3556209A4E9E46647DD7DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ExtendedDurationFixedIncomeMember_9F1AB5B34E3556209A4E9E46647DD7DB" xlink:to="lab_sigi_ExtendedDurationFixedIncomeMember_9F1AB5B34E3556209A4E9E46647DD7DB" xlink:type="arc" />
    <link:label id="lab_sigi_DepositAdministrationContractsMember_0D75C5E25ED2DC976949816F5A771EC4_terseLabel_en-US" xlink:label="lab_sigi_DepositAdministrationContractsMember_2FECACC7854152ED8444F8D8F70B2FB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposit Administration Contracts [Member]</link:label>
    <link:label id="lab_sigi_DepositAdministrationContractsMember_0D75C5E25ED2DC976949816F5A771EC4_label_en-US" xlink:label="lab_sigi_DepositAdministrationContractsMember_2FECACC7854152ED8444F8D8F70B2FB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposit Administration Contracts [Member]</link:label>
    <link:label id="lab_sigi_DepositAdministrationContractsMember_0D75C5E25ED2DC976949816F5A771EC4_documentation_en-US" xlink:label="lab_sigi_DepositAdministrationContractsMember_2FECACC7854152ED8444F8D8F70B2FB5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents cash deposited with an insurer and placed in the insurer's general investment account typically highlighting short-term products. At a plan participant's retirement, the insurer withdraws the funds from the general account to pay the retiree.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DepositAdministrationContractsMember" xlink:label="loc_sigi_DepositAdministrationContractsMember_2FECACC7854152ED8444F8D8F70B2FB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DepositAdministrationContractsMember_2FECACC7854152ED8444F8D8F70B2FB5" xlink:to="lab_sigi_DepositAdministrationContractsMember_2FECACC7854152ED8444F8D8F70B2FB5" xlink:type="arc" />
    <link:label id="lab_sigi_CashAndShortTermInvestmentsMember_27AC9257FB6162E7BC14816F5A774D80_terseLabel_en-US" xlink:label="lab_sigi_CashAndShortTermInvestmentsMember_60381B34EACC548F8FA24866EF88F774" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash And Short Term Investments [Member]</link:label>
    <link:label id="lab_sigi_CashAndShortTermInvestmentsMember_27AC9257FB6162E7BC14816F5A774D80_label_en-US" xlink:label="lab_sigi_CashAndShortTermInvestmentsMember_60381B34EACC548F8FA24866EF88F774" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash And Short Term Investments [Member]</link:label>
    <link:label id="lab_sigi_CashAndShortTermInvestmentsMember_27AC9257FB6162E7BC14816F5A774D80_documentation_en-US" xlink:label="lab_sigi_CashAndShortTermInvestmentsMember_60381B34EACC548F8FA24866EF88F774" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents Cash And Short Term Investments</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_CashAndShortTermInvestmentsMember" xlink:label="loc_sigi_CashAndShortTermInvestmentsMember_60381B34EACC548F8FA24866EF88F774" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_CashAndShortTermInvestmentsMember_60381B34EACC548F8FA24866EF88F774" xlink:to="lab_sigi_CashAndShortTermInvestmentsMember_60381B34EACC548F8FA24866EF88F774" xlink:type="arc" />
    <link:label id="lab_sigi_LiabilityHedgingAssetsMember_128C558E1877BB8B13D7816F5A77B917_terseLabel_en-US" xlink:label="lab_sigi_LiabilityHedgingAssetsMember_5A5CABA7341F566F91E802FD4ABF3EB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability Hedging Assets [Member]</link:label>
    <link:label id="lab_sigi_LiabilityHedgingAssetsMember_128C558E1877BB8B13D7816F5A77B917_label_en-US" xlink:label="lab_sigi_LiabilityHedgingAssetsMember_5A5CABA7341F566F91E802FD4ABF3EB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability Hedging Assets [Member]</link:label>
    <link:label id="lab_sigi_LiabilityHedgingAssetsMember_128C558E1877BB8B13D7816F5A77B917_documentation_en-US" xlink:label="lab_sigi_LiabilityHedgingAssetsMember_5A5CABA7341F566F91E802FD4ABF3EB8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Liability Hedging Assets [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LiabilityHedgingAssetsMember" xlink:label="loc_sigi_LiabilityHedgingAssetsMember_5A5CABA7341F566F91E802FD4ABF3EB8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LiabilityHedgingAssetsMember_5A5CABA7341F566F91E802FD4ABF3EB8" xlink:to="lab_sigi_LiabilityHedgingAssetsMember_5A5CABA7341F566F91E802FD4ABF3EB8" xlink:type="arc" />
    <link:label id="lab_sigi_InternationalSecuritiesMember_DA5B7197D70677F74F00816F5A77015E_verboseLabel_en-US" xlink:label="lab_sigi_InternationalSecuritiesMember_0C9A0EBC51E9530593308976879C140B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">International equity [Member]</link:label>
    <link:label id="lab_sigi_InternationalSecuritiesMember_DA5B7197D70677F74F00816F5A77015E_label_en-US" xlink:label="lab_sigi_InternationalSecuritiesMember_0C9A0EBC51E9530593308976879C140B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">International Securities [Member]</link:label>
    <link:label id="lab_sigi_InternationalSecuritiesMember_DA5B7197D70677F74F00816F5A77015E_documentation_en-US" xlink:label="lab_sigi_InternationalSecuritiesMember_0C9A0EBC51E9530593308976879C140B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents investment securities in international companies.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_InternationalSecuritiesMember" xlink:label="loc_sigi_InternationalSecuritiesMember_0C9A0EBC51E9530593308976879C140B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_InternationalSecuritiesMember_0C9A0EBC51E9530593308976879C140B" xlink:to="lab_sigi_InternationalSecuritiesMember_0C9A0EBC51E9530593308976879C140B" xlink:type="arc" />
    <link:label id="lab_sigi_USGlobalEquityMember_0393A1C95E6487D551D7816F5A7762EC_terseLabel_en-US" xlink:label="lab_sigi_USGlobalEquityMember_17652A91F62D531BAF81BA68C85ABAF6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">US Global Equity [Member]</link:label>
    <link:label id="lab_sigi_USGlobalEquityMember_0393A1C95E6487D551D7816F5A7762EC_label_en-US" xlink:label="lab_sigi_USGlobalEquityMember_17652A91F62D531BAF81BA68C85ABAF6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Global Equity [Member]</link:label>
    <link:label id="lab_sigi_USGlobalEquityMember_0393A1C95E6487D551D7816F5A7762EC_documentation_en-US" xlink:label="lab_sigi_USGlobalEquityMember_17652A91F62D531BAF81BA68C85ABAF6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents investments in US equity securities</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_USGlobalEquityMember" xlink:label="loc_sigi_USGlobalEquityMember_17652A91F62D531BAF81BA68C85ABAF6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_USGlobalEquityMember_17652A91F62D531BAF81BA68C85ABAF6" xlink:to="lab_sigi_USGlobalEquityMember_17652A91F62D531BAF81BA68C85ABAF6" xlink:type="arc" />
    <link:label id="lab_sigi_GlobalEquityMember_E9A15F8C7D93F5F624AA816F5A77184C_terseLabel_en-US" xlink:label="lab_sigi_GlobalEquityMember_B0FFA439FD6753EDA808DD26FFC295E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Global Equity [Member]</link:label>
    <link:label id="lab_sigi_GlobalEquityMember_E9A15F8C7D93F5F624AA816F5A77184C_label_en-US" xlink:label="lab_sigi_GlobalEquityMember_B0FFA439FD6753EDA808DD26FFC295E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Global Equity [Member]</link:label>
    <link:label id="lab_sigi_GlobalEquityMember_E9A15F8C7D93F5F624AA816F5A77184C_documentation_en-US" xlink:label="lab_sigi_GlobalEquityMember_B0FFA439FD6753EDA808DD26FFC295E8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents investments in both US and non-US equity securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_GlobalEquityMember" xlink:label="loc_sigi_GlobalEquityMember_B0FFA439FD6753EDA808DD26FFC295E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_GlobalEquityMember_B0FFA439FD6753EDA808DD26FFC295E8" xlink:to="lab_sigi_GlobalEquityMember_B0FFA439FD6753EDA808DD26FFC295E8" xlink:type="arc" />
    <link:label id="lab_sigi_RealAssetsMember_A63D62AFE0D3C38494F3816F5A770F23_terseLabel_en-US" xlink:label="lab_sigi_RealAssetsMember_9D99982DD793530D9F2871964B3DF37F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Assets [Member]</link:label>
    <link:label id="lab_sigi_RealAssetsMember_A63D62AFE0D3C38494F3816F5A770F23_label_en-US" xlink:label="lab_sigi_RealAssetsMember_9D99982DD793530D9F2871964B3DF37F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Assets [Member]</link:label>
    <link:label id="lab_sigi_RealAssetsMember_A63D62AFE0D3C38494F3816F5A770F23_documentation_en-US" xlink:label="lab_sigi_RealAssetsMember_9D99982DD793530D9F2871964B3DF37F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This strategy includes the Energy &amp; Power Generation and Real Estate strategies, making energy and power generation investments in cash flow generating infrastructure assets and investing opportunistically in real estate in North America, Europe,  and Asia via direct property ownership, joint ventures, mortgages, and investments in equity and debt instruments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RealAssetsMember" xlink:label="loc_sigi_RealAssetsMember_9D99982DD793530D9F2871964B3DF37F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RealAssetsMember_9D99982DD793530D9F2871964B3DF37F" xlink:to="lab_sigi_RealAssetsMember_9D99982DD793530D9F2871964B3DF37F" xlink:type="arc" />
    <link:label id="lab_us-gaap_PrivateEquityFundsMember_29D3AA8E8E16942CBEE3816F5A770C4F_verboseLabel_en-US" xlink:label="lab_us-gaap_PrivateEquityFundsMember_69804C73F11E5BB6A704AB99E3F293A2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Private Equity Funds [Member]</link:label>
    <link:label id="lab_us-gaap_PrivateEquityFundsMember_29D3AA8E8E16942CBEE3816F5A770C4F_label_en-US" xlink:label="lab_us-gaap_PrivateEquityFundsMember_69804C73F11E5BB6A704AB99E3F293A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Private Equity Funds [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrivateEquityFundsMember" xlink:label="loc_us-gaap_PrivateEquityFundsMember_69804C73F11E5BB6A704AB99E3F293A2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrivateEquityFundsMember_69804C73F11E5BB6A704AB99E3F293A2" xlink:to="lab_us-gaap_PrivateEquityFundsMember_69804C73F11E5BB6A704AB99E3F293A2" xlink:type="arc" />
    <link:label id="lab_sigi_PrivateCreditFundsMember_32D6ABF69B8BA928CFFF816F5A770C93_terseLabel_en-US" xlink:label="lab_sigi_PrivateCreditFundsMember_D41B893DD3B55625879E08247F32110B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Private Credit Funds [Member]</link:label>
    <link:label id="lab_sigi_PrivateCreditFundsMember_32D6ABF69B8BA928CFFF816F5A770C93_label_en-US" xlink:label="lab_sigi_PrivateCreditFundsMember_D41B893DD3B55625879E08247F32110B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Private Credit Funds [Member]</link:label>
    <link:label id="lab_sigi_PrivateCreditFundsMember_32D6ABF69B8BA928CFFF816F5A770C93_documentation_en-US" xlink:label="lab_sigi_PrivateCreditFundsMember_D41B893DD3B55625879E08247F32110B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This strategy includes the Mezzanine Financing and Distressed Debt strategies, providing privately negotiated fixed income securities, generally with an equity component, to LBO firms and private and publicly traded large, mid and small-cap companies to finance LBOs, recapitalizations, and acquisitions, and making direct and indirect investments in debt and equity securities of companies that are experiencing financial and/or operational distress.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PrivateCreditFundsMember" xlink:label="loc_sigi_PrivateCreditFundsMember_D41B893DD3B55625879E08247F32110B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PrivateCreditFundsMember_D41B893DD3B55625879E08247F32110B" xlink:to="lab_sigi_PrivateCreditFundsMember_D41B893DD3B55625879E08247F32110B" xlink:type="arc" />
    <link:label id="lab_us-gaap_HedgeFundsMember_718C46D8A363B2B93965816F5A777058_terseLabel_en-US" xlink:label="lab_us-gaap_HedgeFundsMember_1724D2985BDC59F8A2F36712FA2AB9C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedge Funds [Member]</link:label>
    <link:label id="lab_us-gaap_HedgeFundsMember_718C46D8A363B2B93965816F5A777058_label_en-US" xlink:label="lab_us-gaap_HedgeFundsMember_1724D2985BDC59F8A2F36712FA2AB9C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedge Funds [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HedgeFundsMember" xlink:label="loc_us-gaap_HedgeFundsMember_1724D2985BDC59F8A2F36712FA2AB9C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgeFundsMember_1724D2985BDC59F8A2F36712FA2AB9C4" xlink:to="lab_us-gaap_HedgeFundsMember_1724D2985BDC59F8A2F36712FA2AB9C4" xlink:type="arc" />
    <link:label id="lab_sigi_OtherPrivateAssetsMember_59E25BEBF25E4A38E722816F5A77F18F_terseLabel_en-US" xlink:label="lab_sigi_OtherPrivateAssetsMember_0262B7110A505537A12CDC8DDF22FC2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Private Assets [Member]</link:label>
    <link:label id="lab_sigi_OtherPrivateAssetsMember_59E25BEBF25E4A38E722816F5A77F18F_label_en-US" xlink:label="lab_sigi_OtherPrivateAssetsMember_0262B7110A505537A12CDC8DDF22FC2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Private Assets [Member]</link:label>
    <link:label id="lab_sigi_OtherPrivateAssetsMember_59E25BEBF25E4A38E722816F5A77F18F_documentation_en-US" xlink:label="lab_sigi_OtherPrivateAssetsMember_0262B7110A505537A12CDC8DDF22FC2D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Private Assets [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherPrivateAssetsMember" xlink:label="loc_sigi_OtherPrivateAssetsMember_0262B7110A505537A12CDC8DDF22FC2D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherPrivateAssetsMember_0262B7110A505537A12CDC8DDF22FC2D" xlink:to="lab_sigi_OtherPrivateAssetsMember_0262B7110A505537A12CDC8DDF22FC2D" xlink:type="arc" />
    <link:label id="lab_sigi_TotalPrivateAssetsMember_B9FB60C1A3BB43D52A94816F5A77712D_terseLabel_en-US" xlink:label="lab_sigi_TotalPrivateAssetsMember_E659028F014B5133AD305605B46653A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Private Assets [Member]</link:label>
    <link:label id="lab_sigi_TotalPrivateAssetsMember_B9FB60C1A3BB43D52A94816F5A77712D_label_en-US" xlink:label="lab_sigi_TotalPrivateAssetsMember_E659028F014B5133AD305605B46653A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Private Assets [Member]</link:label>
    <link:label id="lab_sigi_TotalPrivateAssetsMember_B9FB60C1A3BB43D52A94816F5A77712D_documentation_en-US" xlink:label="lab_sigi_TotalPrivateAssetsMember_E659028F014B5133AD305605B46653A8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total Private Assets [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalPrivateAssetsMember" xlink:label="loc_sigi_TotalPrivateAssetsMember_E659028F014B5133AD305605B46653A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalPrivateAssetsMember_E659028F014B5133AD305605B46653A8" xlink:to="lab_sigi_TotalPrivateAssetsMember_E659028F014B5133AD305605B46653A8" xlink:type="arc" />
    <link:label id="lab_sigi_ReturnSeekingAssetsMember_18A5649FC7C54C936E96816F5A77FA1B_terseLabel_en-US" xlink:label="lab_sigi_ReturnSeekingAssetsMember_1D5BF6F61F395BD498D392D534FF2589" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Return Seeking Assets [Member]</link:label>
    <link:label id="lab_sigi_ReturnSeekingAssetsMember_18A5649FC7C54C936E96816F5A77FA1B_label_en-US" xlink:label="lab_sigi_ReturnSeekingAssetsMember_1D5BF6F61F395BD498D392D534FF2589" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Return Seeking Assets [Member]</link:label>
    <link:label id="lab_sigi_ReturnSeekingAssetsMember_18A5649FC7C54C936E96816F5A77FA1B_documentation_en-US" xlink:label="lab_sigi_ReturnSeekingAssetsMember_1D5BF6F61F395BD498D392D534FF2589" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Return Seeking Assets [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ReturnSeekingAssetsMember" xlink:label="loc_sigi_ReturnSeekingAssetsMember_1D5BF6F61F395BD498D392D534FF2589" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ReturnSeekingAssetsMember_1D5BF6F61F395BD498D392D534FF2589" xlink:to="lab_sigi_ReturnSeekingAssetsMember_1D5BF6F61F395BD498D392D534FF2589" xlink:type="arc" />
    <link:label id="lab_us-gaap_PartnershipInterestMember_56FD78F5B408DDD97149816F5A77BF31_terseLabel_en-US" xlink:label="lab_us-gaap_PartnershipInterestMember_B6E68FF032FD568DB45F87D13617CE56" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alternative Investments [Member]</link:label>
    <link:label id="lab_us-gaap_PartnershipInterestMember_56FD78F5B408DDD97149816F5A77BF31_label_en-US" xlink:label="lab_us-gaap_PartnershipInterestMember_B6E68FF032FD568DB45F87D13617CE56" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Partnership Interest [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PartnershipInterestMember" xlink:label="loc_us-gaap_PartnershipInterestMember_B6E68FF032FD568DB45F87D13617CE56" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnershipInterestMember_B6E68FF032FD568DB45F87D13617CE56" xlink:to="lab_us-gaap_PartnershipInterestMember_B6E68FF032FD568DB45F87D13617CE56" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_36808759B1F30528C253816F5A7733BA_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_04AC1E7CDC615F6CB466B8A58AF0C90F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Measurement Frequency [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_04AC1E7CDC615F6CB466B8A58AF0C90F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_04AC1E7CDC615F6CB466B8A58AF0C90F" xlink:to="lab_us-gaap_FairValueByMeasurementFrequencyAxis_04AC1E7CDC615F6CB466B8A58AF0C90F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_34C2D81E45AE41BFFB45816F5A77EA89_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_2A8C84A3C7355EDEA28B22B5607CDDC5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair value, recurring [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_2A8C84A3C7355EDEA28B22B5607CDDC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsRecurringMember_2A8C84A3C7355EDEA28B22B5607CDDC5" xlink:to="lab_us-gaap_FairValueMeasurementsRecurringMember_2A8C84A3C7355EDEA28B22B5607CDDC5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanDisclosureLineItems_35B9D05DA71E4CDA1496816F5A777D5A_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanDisclosureLineItems_FCE3E9C142AD541BBD0E5170BE8EFF86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan Disclosure [Line Items]</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanDisclosureLineItems_35B9D05DA71E4CDA1496816F5A777D5A_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanDisclosureLineItems_FCE3E9C142AD541BBD0E5170BE8EFF86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan Disclosure [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FCE3E9C142AD541BBD0E5170BE8EFF86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FCE3E9C142AD541BBD0E5170BE8EFF86" xlink:to="lab_us-gaap_DefinedBenefitPlanDisclosureLineItems_FCE3E9C142AD541BBD0E5170BE8EFF86" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_917BF5F0C4FFCA999A4C816F5A770798_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_A5955A3DDBE455489FE4C7E92F9F60D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_917BF5F0C4FFCA999A4C816F5A770798_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_A5955A3DDBE455489FE4C7E92F9F60D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Fair Value of Plan Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_A5955A3DDBE455489FE4C7E92F9F60D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_A5955A3DDBE455489FE4C7E92F9F60D1" xlink:to="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_A5955A3DDBE455489FE4C7E92F9F60D1" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_3F2BFA5AFD82CFDF49B1816F5A77D143_terseLabel_en-US" xlink:label="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_A4D8585D96B15D70A86D5202168885DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retirement Life Plan [Member]</link:label>
    <link:label id="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_3F2BFA5AFD82CFDF49B1816F5A77D143_label_en-US" xlink:label="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_A4D8585D96B15D70A86D5202168885DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Postretirement Benefits Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_A4D8585D96B15D70A86D5202168885DF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_A4D8585D96B15D70A86D5202168885DF" xlink:to="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_A4D8585D96B15D70A86D5202168885DF" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_01408A239554DE412AC7816F5A77037E_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_777CEC5BB0485DE7BAEF2A25DCFCEF39" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental Employee Retirement Plan [Member]</link:label>
    <link:label id="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_01408A239554DE412AC7816F5A77037E_label_en-US" xlink:label="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_777CEC5BB0485DE7BAEF2A25DCFCEF39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Employee Retirement Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_777CEC5BB0485DE7BAEF2A25DCFCEF39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_777CEC5BB0485DE7BAEF2A25DCFCEF39" xlink:to="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_777CEC5BB0485DE7BAEF2A25DCFCEF39" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanServiceCost_363B10F6B8FAC761C44D816F5A778142_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanServiceCost_3D2D69A0E3065935A2298DA163300C49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Service cost</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanServiceCost_363B10F6B8FAC761C44D816F5A778142_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanServiceCost_3D2D69A0E3065935A2298DA163300C49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Service Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_3D2D69A0E3065935A2298DA163300C49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanServiceCost_3D2D69A0E3065935A2298DA163300C49" xlink:to="lab_us-gaap_DefinedBenefitPlanServiceCost_3D2D69A0E3065935A2298DA163300C49" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanInterestCost_3325A285B275C6418AAD816F5A770EE5_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanInterestCost_7AB0FABB3FB55612B7FA8DF2B029E7F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest cost</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanInterestCost_3325A285B275C6418AAD816F5A770EE5_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanInterestCost_7AB0FABB3FB55612B7FA8DF2B029E7F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Interest Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_7AB0FABB3FB55612B7FA8DF2B029E7F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanInterestCost_7AB0FABB3FB55612B7FA8DF2B029E7F2" xlink:to="lab_us-gaap_DefinedBenefitPlanInterestCost_7AB0FABB3FB55612B7FA8DF2B029E7F2" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_DBD6AAC9F0CBF51B512D816F5A7747F5_negatedLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_47BCDC759B2D5C678CB2B0E3AD109F1B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Expected return on plan assets</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_DBD6AAC9F0CBF51B512D816F5A7747F5_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_47BCDC759B2D5C678CB2B0E3AD109F1B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Return (Loss) on Plan Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_47BCDC759B2D5C678CB2B0E3AD109F1B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_47BCDC759B2D5C678CB2B0E3AD109F1B" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_47BCDC759B2D5C678CB2B0E3AD109F1B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_536AB8047BE017EBB8B2816F5A778CB0_negatedLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_033BED24C50C520E8007131D6084FD05" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Amortization of unrecognized actuarial loss</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_536AB8047BE017EBB8B2816F5A778CB0_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_033BED24C50C520E8007131D6084FD05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Amortization of Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_033BED24C50C520E8007131D6084FD05" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_033BED24C50C520E8007131D6084FD05" xlink:to="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_033BED24C50C520E8007131D6084FD05" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_7F314DC20B8E0CA00572816F5A77D449_totalLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_76A224A59B565D75A07A2DFA27FD31CF" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total net periodic cost</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_7F314DC20B8E0CA00572816F5A77D449_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_76A224A59B565D75A07A2DFA27FD31CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Net Periodic Benefit Cost (Credit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_76A224A59B565D75A07A2DFA27FD31CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_76A224A59B565D75A07A2DFA27FD31CF" xlink:to="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_76A224A59B565D75A07A2DFA27FD31CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_718B3BDACC55183A582D816F5A77DB41_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_9052091847395CA7A671F8CA520A6A2C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net actuarial loss (gain)</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_718B3BDACC55183A582D816F5A77DB41_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_9052091847395CA7A671F8CA520A6A2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_9052091847395CA7A671F8CA520A6A2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_9052091847395CA7A671F8CA520A6A2C" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_9052091847395CA7A671F8CA520A6A2C" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_35970E73C50CBD4C672B816F5A773218_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7E09E33F841C5DD8B8F4C24081C6810A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reversal of amortization of net actuarial loss</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_35970E73C50CBD4C672B816F5A773218_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7E09E33F841C5DD8B8F4C24081C6810A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7E09E33F841C5DD8B8F4C24081C6810A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7E09E33F841C5DD8B8F4C24081C6810A" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7E09E33F841C5DD8B8F4C24081C6810A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_BAF565D0726801CCA510816F5A774D45_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_08F47673A6C658F58CD481C2FFE5B7DF" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total recognized in other comprehensive income</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_BAF565D0726801CCA510816F5A774D45_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_08F47673A6C658F58CD481C2FFE5B7DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, before Tax, after Reclassification Adjustment, Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_08F47673A6C658F58CD481C2FFE5B7DF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_08F47673A6C658F58CD481C2FFE5B7DF" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent_08F47673A6C658F58CD481C2FFE5B7DF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_7F932EEABB0DE3CA7506816F5A77945B_totalLabel_en-US" xlink:label="lab_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_7CDE3D5C34CD5DB5A5B96CD9861E982D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total recognized in net periodic benefit cost and OCI</link:label>
    <link:label id="lab_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_7F932EEABB0DE3CA7506816F5A77945B_label_en-US" xlink:label="lab_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_7CDE3D5C34CD5DB5A5B96CD9861E982D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_7CDE3D5C34CD5DB5A5B96CD9861E982D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_7CDE3D5C34CD5DB5A5B96CD9861E982D" xlink:to="lab_us-gaap_AmountRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLossBeforeTax_7CDE3D5C34CD5DB5A5B96CD9861E982D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_A6585157B9238E99B408816F5A776F47_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_7868CC54E6FB50E198FCDF6363290F50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated net actuarial loss that will be amortized from AOCI into net periodic benefit cost</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_A6585157B9238E99B408816F5A776F47_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_7868CC54E6FB50E198FCDF6363290F50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_7868CC54E6FB50E198FCDF6363290F50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_7868CC54E6FB50E198FCDF6363290F50" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear_7868CC54E6FB50E198FCDF6363290F50" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentTypeCategorizationMember_80552EB02FBDFB1AB4B1101EE44EE185_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember_961D5356C7D75E2AAC3F09AA944E30E6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investments [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_961D5356C7D75E2AAC3F09AA944E30E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_961D5356C7D75E2AAC3F09AA944E30E6" xlink:to="lab_us-gaap_InvestmentTypeCategorizationMember_961D5356C7D75E2AAC3F09AA944E30E6" xlink:type="arc" />
    <link:label id="lab_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_6F4873C425D3382CE616101EE44EE024_terseLabel_en-US" xlink:label="lab_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_4E152317185B5B58A91B9E7845105752" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments Accounted For Under The Equity Method [Member]</link:label>
    <link:label id="lab_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_6F4873C425D3382CE616101EE44EE024_label_en-US" xlink:label="lab_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_4E152317185B5B58A91B9E7845105752" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments Accounted For Under The Equity Method [Member]</link:label>
    <link:label id="lab_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_6F4873C425D3382CE616101EE44EE024_documentation_en-US" xlink:label="lab_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_4E152317185B5B58A91B9E7845105752" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents investments accounted for under the equity method.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_InvestmentsAccountedForUnderTheEquityMethodMember" xlink:label="loc_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_4E152317185B5B58A91B9E7845105752" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_4E152317185B5B58A91B9E7845105752" xlink:to="lab_sigi_InvestmentsAccountedForUnderTheEquityMethodMember_4E152317185B5B58A91B9E7845105752" xlink:type="arc" />
    <link:label id="lab_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_7C87CDFF7927A08E7ED0101EE44ED565_terseLabel_en-US" xlink:label="lab_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_C881ACA0EB7951328A1F6FF7E47E91EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments</link:label>
    <link:label id="lab_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_7C87CDFF7927A08E7ED0101EE44ED565_label_en-US" xlink:label="lab_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_C881ACA0EB7951328A1F6FF7E47E91EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investments Summarized Financial Information Investments</link:label>
    <link:label id="lab_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_7C87CDFF7927A08E7ED0101EE44ED565_documentation_en-US" xlink:label="lab_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_C881ACA0EB7951328A1F6FF7E47E91EA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of investments reported by an equity method investment of the entity.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments" xlink:label="loc_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_C881ACA0EB7951328A1F6FF7E47E91EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_C881ACA0EB7951328A1F6FF7E47E91EA" xlink:to="lab_sigi_EquityMethodInvestmentsSummarizedFinancialInformationInvestments_C881ACA0EB7951328A1F6FF7E47E91EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_12C2B9595950C1E5025C101EE44EA40F_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_2F2D1F7F12B457E5978E7CE9D45BF0FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_12C2B9595950C1E5025C101EE44EA40F_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_2F2D1F7F12B457E5978E7CE9D45BF0FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_2F2D1F7F12B457E5978E7CE9D45BF0FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_2F2D1F7F12B457E5978E7CE9D45BF0FA" xlink:to="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_2F2D1F7F12B457E5978E7CE9D45BF0FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_1161A305BD320D37EB50101EE44E6CD1_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_C83122707F775730A6070879BBE375E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_1161A305BD320D37EB50101EE44E6CD1_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_C83122707F775730A6070879BBE375E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_C83122707F775730A6070879BBE375E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_C83122707F775730A6070879BBE375E2" xlink:to="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_C83122707F775730A6070879BBE375E2" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_CC54AAA4594928028A61101EE44F5E32_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_FFF47C0D4A095F47918EF6601C3F5967" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Partners' capital</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_CC54AAA4594928028A61101EE44F5E32_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_FFF47C0D4A095F47918EF6601C3F5967" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investment Summarized Financial Information, Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_FFF47C0D4A095F47918EF6601C3F5967" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_FFF47C0D4A095F47918EF6601C3F5967" xlink:to="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_FFF47C0D4A095F47918EF6601C3F5967" xlink:type="arc" />
    <link:label id="lab_sigi_OrganizationAbstract_D9571A4CCB3C442A5A69101EE637F9EC_label_en-US" xlink:label="lab_sigi_OrganizationAbstract_0D6689701A92520FAD280D0A10FB25F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization [Abstract]</link:label>
    <link:label id="lab_sigi_OrganizationAbstract_D9571A4CCB3C442A5A69101EE637F9EC_documentation_en-US" xlink:label="lab_sigi_OrganizationAbstract_0D6689701A92520FAD280D0A10FB25F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">n/a</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OrganizationAbstract" xlink:label="loc_sigi_OrganizationAbstract_0D6689701A92520FAD280D0A10FB25F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OrganizationAbstract_0D6689701A92520FAD280D0A10FB25F6" xlink:to="lab_sigi_OrganizationAbstract_0D6689701A92520FAD280D0A10FB25F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_NatureOfOperations_2A1748005B12441683D8101EE6379D98_terseLabel_en-US" xlink:label="lab_us-gaap_NatureOfOperations_1A70212A14825A4384CF9455F3548F11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Organization</link:label>
    <link:label id="lab_us-gaap_NatureOfOperations_2A1748005B12441683D8101EE6379D98_label_en-US" xlink:label="lab_us-gaap_NatureOfOperations_1A70212A14825A4384CF9455F3548F11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nature of Operations [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NatureOfOperations" xlink:label="loc_us-gaap_NatureOfOperations_1A70212A14825A4384CF9455F3548F11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NatureOfOperations_1A70212A14825A4384CF9455F3548F11" xlink:to="lab_us-gaap_NatureOfOperations_1A70212A14825A4384CF9455F3548F11" xlink:type="arc" />
    <link:label id="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_1D66A34187ACF6C5C96E81131592994B_label_en-US" xlink:label="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_5BA34B2C46BB5F298C796D3CCC33C423" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Information of Parent Company Only Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:label="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_5BA34B2C46BB5F298C796D3CCC33C423" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_5BA34B2C46BB5F298C796D3CCC33C423" xlink:to="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_5BA34B2C46BB5F298C796D3CCC33C423" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementTable_443664EDEA0B4F020CB7811315926884_verboseLabel_en-US" xlink:label="lab_us-gaap_StatementTable_D6ACDDA7092D55BF893FDE755A096802" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Condensed Financial Statements [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_D6ACDDA7092D55BF893FDE755A096802" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable_D6ACDDA7092D55BF893FDE755A096802" xlink:to="lab_us-gaap_StatementTable_D6ACDDA7092D55BF893FDE755A096802" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_2D038489A5DD249DBC44811315924299_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_92B33C42F62C5B74BCEB771767BAC670" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_2D038489A5DD249DBC44811315924299_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_92B33C42F62C5B74BCEB771767BAC670" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_92B33C42F62C5B74BCEB771767BAC670" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_92B33C42F62C5B74BCEB771767BAC670" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_92B33C42F62C5B74BCEB771767BAC670" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_267E47FEEDF64A5D0B37811315A21851_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9564ED2806105F6B9447F7E8B4EA797D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income to net cash provided by operating activities:</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_267E47FEEDF64A5D0B37811315A21851_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9564ED2806105F6B9447F7E8B4EA797D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9564ED2806105F6B9447F7E8B4EA797D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9564ED2806105F6B9447F7E8B4EA797D" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_9564ED2806105F6B9447F7E8B4EA797D" xlink:type="arc" />
    <link:label id="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_13F71B4E5900A670623A811315A25B14_negatedTerseLabel_en-US" xlink:label="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_80E97B57815E5B619CBA03F43039FA5C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Equity In Undistributed Income Of Continuing Subsidiaries, Net Of Tax</link:label>
    <link:label id="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_13F71B4E5900A670623A811315A25B14_label_en-US" xlink:label="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_80E97B57815E5B619CBA03F43039FA5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity In Undistributed Income Of Continuing Subsidiaries Net Of Tax</link:label>
    <link:label id="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_13F71B4E5900A670623A811315A25B14_documentation_en-US" xlink:label="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_80E97B57815E5B619CBA03F43039FA5C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the parent's equity in undistributed income of its continuing subsidiaries for the period, net of tax.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax" xlink:label="loc_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_80E97B57815E5B619CBA03F43039FA5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_80E97B57815E5B619CBA03F43039FA5C" xlink:to="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_80E97B57815E5B619CBA03F43039FA5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensation_F135CEACC34EBD191707811315A28CBF_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_5C56127A96625B5DB46146A7DC7458FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation expense</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_F135CEACC34EBD191707811315A28CBF_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_5C56127A96625B5DB46146A7DC7458FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_5C56127A96625B5DB46146A7DC7458FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation_5C56127A96625B5DB46146A7DC7458FA" xlink:to="lab_us-gaap_ShareBasedCompensation_5C56127A96625B5DB46146A7DC7458FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLosses_652CA5403814C7CAE118811315A23D75_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLosses_1BE7384B0E8E54F3A118DD9BDA84888E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net realized losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_1BE7384B0E8E54F3A118DD9BDA84888E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedInvestmentGainsLosses_1BE7384B0E8E54F3A118DD9BDA84888E" xlink:to="lab_us-gaap_RealizedInvestmentGainsLosses_1BE7384B0E8E54F3A118DD9BDA84888E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_686C34EB3EFF71DD404D811315A2F1E2_verboseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_0B0C024F4C3F5A77BA913CC448756779" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amortization - other</link:label>
    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_686C34EB3EFF71DD404D811315A2F1E2_label_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_0B0C024F4C3F5A77BA913CC448756779" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Amortization and Accretion, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_0B0C024F4C3F5A77BA913CC448756779" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationAmortizationAndAccretionNet_0B0C024F4C3F5A77BA913CC448756779" xlink:to="lab_us-gaap_DepreciationAmortizationAndAccretionNet_0B0C024F4C3F5A77BA913CC448756779" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4B13BA2EF9B26EE2DFBE811315A26022_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_C7F164D40B03521BA028BDF68D0D33F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in assets and liabilities:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4B13BA2EF9B26EE2DFBE811315A26022_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_C7F164D40B03521BA028BDF68D0D33F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_C7F164D40B03521BA028BDF68D0D33F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_C7F164D40B03521BA028BDF68D0D33F8" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_C7F164D40B03521BA028BDF68D0D33F8" xlink:type="arc" />
    <link:label id="lab_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_3039601B8E12531FB42D811315A249A1_terseLabel_en-US" xlink:label="lab_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_01017E9042175A92AD691E0F8D5174F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase in accrued long-term stock compensation</link:label>
    <link:label id="lab_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_3039601B8E12531FB42D811315A249A1_label_en-US" xlink:label="lab_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_01017E9042175A92AD691E0F8D5174F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase Decrease In Accrued Long Term Stock Compensation</link:label>
    <link:label id="lab_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_3039601B8E12531FB42D811315A249A1_documentation_en-US" xlink:label="lab_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_01017E9042175A92AD691E0F8D5174F3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The increase or decrease in our long term stock compensation accrued liability</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_IncreaseDecreaseInAccruedLongTermStockCompensation" xlink:label="loc_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_01017E9042175A92AD691E0F8D5174F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_01017E9042175A92AD691E0F8D5174F3" xlink:to="lab_sigi_IncreaseDecreaseInAccruedLongTermStockCompensation_01017E9042175A92AD691E0F8D5174F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_70C0E93E7B195E8E0FA8811315A26292_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_5ED9539E2A2D59D4B7853860DA9772E1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Decrease (increase) in net federal income taxes</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_70C0E93E7B195E8E0FA8811315A26292_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_5ED9539E2A2D59D4B7853860DA9772E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Income Taxes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxes_5ED9539E2A2D59D4B7853860DA9772E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInIncomeTaxes_5ED9539E2A2D59D4B7853860DA9772E1" xlink:to="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_5ED9539E2A2D59D4B7853860DA9772E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_144DEFD002807A040E35811315A20FA5_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_D1C538B98FE357D185BBEC7718900DD2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Decrease in other assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_144DEFD002807A040E35811315A20FA5_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_D1C538B98FE357D185BBEC7718900DD2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_D1C538B98FE357D185BBEC7718900DD2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_D1C538B98FE357D185BBEC7718900DD2" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_D1C538B98FE357D185BBEC7718900DD2" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_CAF1FF369194C639F434811315A297F1_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_5F860446961D5D79A585DF01596DB59C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Increase (decrease) in other liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_CAF1FF369194C639F434811315A297F1_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_5F860446961D5D79A585DF01596DB59C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_5F860446961D5D79A585DF01596DB59C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_5F860446961D5D79A585DF01596DB59C" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_5F860446961D5D79A585DF01596DB59C" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_19E5F07142B76CE30CEE811315A24A25_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_C29020CFC1E25480AB4B5E418106A051" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_19E5F07142B76CE30CEE811315A24A25_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_C29020CFC1E25480AB4B5E418106A051" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities, Continuing Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_C29020CFC1E25480AB4B5E418106A051" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_C29020CFC1E25480AB4B5E418106A051" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_C29020CFC1E25480AB4B5E418106A051" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_73FB8C9340530238EAA3811315A21F51_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_14F2C77DA0A95521BC3B6436A5155442" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investing Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_73FB8C9340530238EAA3811315A21F51_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_14F2C77DA0A95521BC3B6436A5155442" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_14F2C77DA0A95521BC3B6436A5155442" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_14F2C77DA0A95521BC3B6436A5155442" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_14F2C77DA0A95521BC3B6436A5155442" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_79F5D8E6EB4B20E17CF2811315A24A34_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_9D0AFB1F04BB515FB07EF9ECB9EBCF47" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of fixed income securities, available-for-sale</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_79F5D8E6EB4B20E17CF2811315A24A34_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_9D0AFB1F04BB515FB07EF9ECB9EBCF47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Available-for-sale Securities, Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_9D0AFB1F04BB515FB07EF9ECB9EBCF47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_9D0AFB1F04BB515FB07EF9ECB9EBCF47" xlink:to="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_9D0AFB1F04BB515FB07EF9ECB9EBCF47" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_63677EAAE16CF1C547EF811315A27FF8_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_A3C64B75DACD5DC59A1B6CC13F92A9CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption and maturities of fixed income securities, available-for-sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_63677EAAE16CF1C547EF811315A27FF8_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_A3C64B75DACD5DC59A1B6CC13F92A9CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_A3C64B75DACD5DC59A1B6CC13F92A9CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_A3C64B75DACD5DC59A1B6CC13F92A9CF" xlink:to="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_A3C64B75DACD5DC59A1B6CC13F92A9CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_8EC37F053D0D0F3646EC811315A2D9CE_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_63069845AC7657F891F9BC8BFDDCB9FD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Sale of fixed income securities, available for sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_8EC37F053D0D0F3646EC811315A2D9CE_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_63069845AC7657F891F9BC8BFDDCB9FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_63069845AC7657F891F9BC8BFDDCB9FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_63069845AC7657F891F9BC8BFDDCB9FD" xlink:to="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_63069845AC7657F891F9BC8BFDDCB9FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireShortTermInvestments_3196EDDF2A07F7602D8E811315A2B8A3_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireShortTermInvestments_890E88496FE45E13886E4D0594353D23" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of short-term investments</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireShortTermInvestments_3196EDDF2A07F7602D8E811315A2B8A3_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireShortTermInvestments_890E88496FE45E13886E4D0594353D23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Short-term Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireShortTermInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_890E88496FE45E13886E4D0594353D23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireShortTermInvestments_890E88496FE45E13886E4D0594353D23" xlink:to="lab_us-gaap_PaymentsToAcquireShortTermInvestments_890E88496FE45E13886E4D0594353D23" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_628F5A64683A841DADC5811315A2D2BA_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_C39CCAF712EE5089A22549276B81147F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale of short-term investments</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_628F5A64683A841DADC5811315A2D2BA_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_C39CCAF712EE5089A22549276B81147F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Short-term Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_C39CCAF712EE5089A22549276B81147F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_C39CCAF712EE5089A22549276B81147F" xlink:to="lab_us-gaap_ProceedsFromSaleOfShortTermInvestments_C39CCAF712EE5089A22549276B81147F" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_CFD2D4A4B880EE778B11811315A29E8A_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_D2481148AE645033963AC63FE963604E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cash used in investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_CFD2D4A4B880EE778B11811315A29E8A_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_D2481148AE645033963AC63FE963604E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities, Continuing Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_D2481148AE645033963AC63FE963604E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_D2481148AE645033963AC63FE963604E" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_D2481148AE645033963AC63FE963604E" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_78D9A78F67EEE6DE13A6811315A28E78_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_AF77136503C050C788C5803CEE215A46" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_78D9A78F67EEE6DE13A6811315A28E78_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_AF77136503C050C788C5803CEE215A46" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_AF77136503C050C788C5803CEE215A46" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_AF77136503C050C788C5803CEE215A46" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_AF77136503C050C788C5803CEE215A46" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_651246D32965FC0162A6811315A23B70_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_F4C1CDC6FFAD562C823C351B4C721CCE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Dividends to stockholders</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_651246D32965FC0162A6811315A23B70_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_F4C1CDC6FFAD562C823C351B4C721CCE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Ordinary Dividends, Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_F4C1CDC6FFAD562C823C351B4C721CCE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsCommonStock_F4C1CDC6FFAD562C823C351B4C721CCE" xlink:to="lab_us-gaap_PaymentsOfDividendsCommonStock_F4C1CDC6FFAD562C823C351B4C721CCE" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_20E0CC7ECF717060C63A811315A2A35E_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_A40636DCEE905062AA4A569B13C44178" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Acquisition of treasury stock</link:label>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_20E0CC7ECF717060C63A811315A2A35E_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_A40636DCEE905062AA4A569B13C44178" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_A40636DCEE905062AA4A569B13C44178" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_A40636DCEE905062AA4A569B13C44178" xlink:to="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_A40636DCEE905062AA4A569B13C44178" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_30D3E066C85E81DB8CF1811315A2CF6D_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_ACCEB5C4CD41534692E836B53D5E3C0D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net proceeds from stock purchase and compensation plans</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_30D3E066C85E81DB8CF1811315A2CF6D_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_ACCEB5C4CD41534692E836B53D5E3C0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_ACCEB5C4CD41534692E836B53D5E3C0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_ACCEB5C4CD41534692E836B53D5E3C0D" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_ACCEB5C4CD41534692E836B53D5E3C0D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_D9ABA7E98814FF43A65F811315A233F8_terseLabel_en-US" xlink:label="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_2909B33FDE4154DE8CC8DFEBD4B0C217" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excess tax benefits from share-based payment arrangements</link:label>
    <link:label id="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_D9ABA7E98814FF43A65F811315A233F8_label_en-US" xlink:label="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_2909B33FDE4154DE8CC8DFEBD4B0C217" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excess Tax Benefit from Share-based Compensation, Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_2909B33FDE4154DE8CC8DFEBD4B0C217" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_2909B33FDE4154DE8CC8DFEBD4B0C217" xlink:to="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_2909B33FDE4154DE8CC8DFEBD4B0C217" xlink:type="arc" />
    <link:label id="lab_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_118365D3DF13FA6D0090811315A2E054_negatedLabel_en-US" xlink:label="lab_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_5FAC9032DABC5AF689BD8F7B9CA25624" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Principal payments of borrowings from subsidiaries</link:label>
    <link:label id="lab_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_118365D3DF13FA6D0090811315A2E054_label_en-US" xlink:label="lab_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_5FAC9032DABC5AF689BD8F7B9CA25624" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Principal Payments Of Borrowings From Subsidiaries</link:label>
    <link:label id="lab_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_118365D3DF13FA6D0090811315A2E054_documentation_en-US" xlink:label="lab_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_5FAC9032DABC5AF689BD8F7B9CA25624" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The cash outflow for debt with subsidiaries initially having maturity due after one year or beyond the normal operating cycle, if longer.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries" xlink:label="loc_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_5FAC9032DABC5AF689BD8F7B9CA25624" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_5FAC9032DABC5AF689BD8F7B9CA25624" xlink:to="lab_sigi_PrincipalPaymentsOfBorrowingsFromSubsidiaries_5FAC9032DABC5AF689BD8F7B9CA25624" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_CF80E613721797A07F0D811315A2BBDA_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_1123DEB5DFCD5E649F4F6454B631D764" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net cash used in financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_CF80E613721797A07F0D811315A2BBDA_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_1123DEB5DFCD5E649F4F6454B631D764" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities, Continuing Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_1123DEB5DFCD5E649F4F6454B631D764" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_1123DEB5DFCD5E649F4F6454B631D764" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_1123DEB5DFCD5E649F4F6454B631D764" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInContinuingOperations_11A052A520208E077E31811315A2A34E_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInContinuingOperations_DA855C58AAFB50D4B44BC42E134CA7FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net increase (decrease) in cash</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInContinuingOperations_11A052A520208E077E31811315A2A34E_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInContinuingOperations_DA855C58AAFB50D4B44BC42E134CA7FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Continuing Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInContinuingOperations_DA855C58AAFB50D4B44BC42E134CA7FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInContinuingOperations_DA855C58AAFB50D4B44BC42E134CA7FD" xlink:to="lab_us-gaap_NetCashProvidedByUsedInContinuingOperations_DA855C58AAFB50D4B44BC42E134CA7FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_Cash_7BE863D412AA25875D5A811315A20DAD_periodStartLabel_en-US" xlink:label="lab_us-gaap_Cash_39237B6BEE8855F791558A6445C5F760" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash, beginning of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_39237B6BEE8855F791558A6445C5F760" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Cash_39237B6BEE8855F791558A6445C5F760" xlink:to="lab_us-gaap_Cash_39237B6BEE8855F791558A6445C5F760" xlink:type="arc" />
    <link:label id="lab_us-gaap_Cash_BDC0053F57F1C6B01007811315A26EA5_periodEndLabel_en-US" xlink:label="lab_us-gaap_Cash_287B0255A2DD587D9D3EB84F165D5C44" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash, end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_287B0255A2DD587D9D3EB84F165D5C44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Cash_287B0255A2DD587D9D3EB84F165D5C44" xlink:to="lab_us-gaap_Cash_287B0255A2DD587D9D3EB84F165D5C44" xlink:type="arc" />
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesTable_B8672E8C1FA069644526A04F73BDBCAA_terseLabel_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesTable_507A21D8D59558FDA54D7700D6589EB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Flood Ceded Premiums and Losses [Table]</link:label>
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesTable_B8672E8C1FA069644526A04F73BDBCAA_label_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesTable_507A21D8D59558FDA54D7700D6589EB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Flood Ceded Premiums and Losses [Table]</link:label>
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesTable_B8672E8C1FA069644526A04F73BDBCAA_documentation_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesTable_507A21D8D59558FDA54D7700D6589EB2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure pertaining to premiums and loss and loss expenses ceded to the National Flood Insurance Program.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FloodCededPremiumsAndLossesTable" xlink:label="loc_sigi_FloodCededPremiumsAndLossesTable_507A21D8D59558FDA54D7700D6589EB2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FloodCededPremiumsAndLossesTable_507A21D8D59558FDA54D7700D6589EB2" xlink:to="lab_sigi_FloodCededPremiumsAndLossesTable_507A21D8D59558FDA54D7700D6589EB2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_C310F8F1542C3B042E6CA04F73BDDC28_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_FA06A44D4F1C55E0B5EE082CEB1F39AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Catastrophic Event [Axis]</link:label>
    <link:label id="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_C310F8F1542C3B042E6CA04F73BDDC28_label_en-US" xlink:label="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_FA06A44D4F1C55E0B5EE082CEB1F39AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Catastrophic Event [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_FA06A44D4F1C55E0B5EE082CEB1F39AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_FA06A44D4F1C55E0B5EE082CEB1F39AA" xlink:to="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_FA06A44D4F1C55E0B5EE082CEB1F39AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_CatastrophicEventDomain_65836E10D40BD4BCFE12A04F73BD732A_terseLabel_en-US" xlink:label="lab_us-gaap_CatastrophicEventDomain_AD79A1F4C4D553FD87DF01A2F014DCFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Catastrophic Event [Domain]</link:label>
    <link:label id="lab_us-gaap_CatastrophicEventDomain_65836E10D40BD4BCFE12A04F73BD732A_label_en-US" xlink:label="lab_us-gaap_CatastrophicEventDomain_AD79A1F4C4D553FD87DF01A2F014DCFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Catastrophic Event [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CatastrophicEventDomain" xlink:label="loc_us-gaap_CatastrophicEventDomain_AD79A1F4C4D553FD87DF01A2F014DCFC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CatastrophicEventDomain_AD79A1F4C4D553FD87DF01A2F014DCFC" xlink:to="lab_us-gaap_CatastrophicEventDomain_AD79A1F4C4D553FD87DF01A2F014DCFC" xlink:type="arc" />
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesAxis_38FE12C28622B6831F37A04F73BDA550_terseLabel_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesAxis_51866184A89D558FABF99CDC3D07B559" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Flood Ceded Premiums And Losses [Axis]</link:label>
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesAxis_38FE12C28622B6831F37A04F73BDA550_label_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesAxis_51866184A89D558FABF99CDC3D07B559" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Flood Ceded Premiums And Losses [Axis]</link:label>
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesAxis_38FE12C28622B6831F37A04F73BDA550_documentation_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesAxis_51866184A89D558FABF99CDC3D07B559" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Information pertaining to premiums and loss and loss expenses ceded to the National Flood Insurance Program.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FloodCededPremiumsAndLossesAxis" xlink:label="loc_sigi_FloodCededPremiumsAndLossesAxis_51866184A89D558FABF99CDC3D07B559" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FloodCededPremiumsAndLossesAxis_51866184A89D558FABF99CDC3D07B559" xlink:to="lab_sigi_FloodCededPremiumsAndLossesAxis_51866184A89D558FABF99CDC3D07B559" xlink:type="arc" />
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesDomain_C6D9A82D0B1CF0C026B1A04F73BDC3E8_terseLabel_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesDomain_5A359ADD0A885A2F9205CE110879D70F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Flood Ceded Premiums and Losses [Domain]</link:label>
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesDomain_C6D9A82D0B1CF0C026B1A04F73BDC3E8_label_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesDomain_5A359ADD0A885A2F9205CE110879D70F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Flood Ceded Premiums And Losses [Domain]</link:label>
    <link:label id="lab_sigi_FloodCededPremiumsAndLossesDomain_C6D9A82D0B1CF0C026B1A04F73BDC3E8_documentation_en-US" xlink:label="lab_sigi_FloodCededPremiumsAndLossesDomain_5A359ADD0A885A2F9205CE110879D70F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Information pertaining to premiums and loss and loss expenses ceded to the National Flood Insurance Program.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FloodCededPremiumsAndLossesDomain" xlink:label="loc_sigi_FloodCededPremiumsAndLossesDomain_5A359ADD0A885A2F9205CE110879D70F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FloodCededPremiumsAndLossesDomain_5A359ADD0A885A2F9205CE110879D70F" xlink:to="lab_sigi_FloodCededPremiumsAndLossesDomain_5A359ADD0A885A2F9205CE110879D70F" xlink:type="arc" />
    <link:label id="lab_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_4F18B778428E994ED56FA04F73BDE7BD_terseLabel_en-US" xlink:label="lab_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_A8E810F462875301A766C832CD678B86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of NFIP claims ceded to the federal government</link:label>
    <link:label id="lab_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_4F18B778428E994ED56FA04F73BDE7BD_label_en-US" xlink:label="lab_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_A8E810F462875301A766C832CD678B86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of unpaid NFIP claims ceded by federal government</link:label>
    <link:label id="lab_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_4F18B778428E994ED56FA04F73BDE7BD_documentation_en-US" xlink:label="lab_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_A8E810F462875301A766C832CD678B86" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of unpaid NFIP claims ceded by federal government</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment" xlink:label="loc_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_A8E810F462875301A766C832CD678B86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_A8E810F462875301A766C832CD678B86" xlink:to="lab_sigi_PercentageOfUnpaidNfipClaimsCededByFederalGovernment_A8E810F462875301A766C832CD678B86" xlink:type="arc" />
    <link:label id="lab_us-gaap_CededPremiumsWritten_F0E7B5E45010A4A82C10A04F73BDBC9A_negatedLabel_en-US" xlink:label="lab_us-gaap_CededPremiumsWritten_CF305830AF635B6FA7176D5F66FF3CD5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Ceded premiums written</link:label>
    <link:label id="lab_us-gaap_CededPremiumsWritten_F0E7B5E45010A4A82C10A04F73BDBC9A_label_en-US" xlink:label="lab_us-gaap_CededPremiumsWritten_CF305830AF635B6FA7176D5F66FF3CD5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ceded Premiums Written</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CededPremiumsWritten" xlink:label="loc_us-gaap_CededPremiumsWritten_CF305830AF635B6FA7176D5F66FF3CD5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CededPremiumsWritten_CF305830AF635B6FA7176D5F66FF3CD5" xlink:to="lab_us-gaap_CededPremiumsWritten_CF305830AF635B6FA7176D5F66FF3CD5" xlink:type="arc" />
    <link:label id="lab_us-gaap_CededPremiumsEarned_C11338FDF5F809120396A04F73BD7D06_negatedLabel_en-US" xlink:label="lab_us-gaap_CededPremiumsEarned_070A99CB95D652FFBFD8823A66CF6BEE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Ceded premiums earned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CededPremiumsEarned" xlink:label="loc_us-gaap_CededPremiumsEarned_070A99CB95D652FFBFD8823A66CF6BEE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CededPremiumsEarned_070A99CB95D652FFBFD8823A66CF6BEE" xlink:to="lab_us-gaap_CededPremiumsEarned_070A99CB95D652FFBFD8823A66CF6BEE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_B632049C4BB3EC6DB966A04F73BED4CE_negatedLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_3F1E14082A8F5E64881D7A8C5B205EEC" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Ceded loss and loss expense</link:label>
    <link:label id="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_B632049C4BB3EC6DB966A04F73BED4CE_label_en-US" xlink:label="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_3F1E14082A8F5E64881D7A8C5B205EEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Policyholder Benefits and Claims Incurred, Ceded</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded" xlink:label="loc_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_3F1E14082A8F5E64881D7A8C5B205EEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_3F1E14082A8F5E64881D7A8C5B205EEC" xlink:to="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_3F1E14082A8F5E64881D7A8C5B205EEC" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_E460BAE46AA3082F6AA7101EE3FE7327_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_9554647B1F86518F9B524BDA0665AB90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Information</link:label>
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_E460BAE46AA3082F6AA7101EE3FE7327_label_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_9554647B1F86518F9B524BDA0665AB90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_9554647B1F86518F9B524BDA0665AB90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingDisclosureTextBlock_9554647B1F86518F9B524BDA0665AB90" xlink:to="lab_us-gaap_SegmentReportingDisclosureTextBlock_9554647B1F86518F9B524BDA0665AB90" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_2C2C311F1F2D954D18798C935691D7D9_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_3CC1F745B82052569A787EA4DA363F55" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed income securities, available-for-sale, amortized cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_3CC1F745B82052569A787EA4DA363F55" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_3CC1F745B82052569A787EA4DA363F55" xlink:to="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_3CC1F745B82052569A787EA4DA363F55" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable_BAF3D9589DEA03560B169FB6F4595029_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable_EFCFDEF27BA25741A16D3A8D099794C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claims Development [Table]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable_BAF3D9589DEA03560B169FB6F4595029_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable_EFCFDEF27BA25741A16D3A8D099794C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claims Development [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable_EFCFDEF27BA25741A16D3A8D099794C0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable_EFCFDEF27BA25741A16D3A8D099794C0" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTable_EFCFDEF27BA25741A16D3A8D099794C0" xlink:type="arc" />
    <link:label id="lab_sigi_ESLinesMember_C6AB1E888F7C266592A99FB6F45AB423_terseLabel_en-US" xlink:label="lab_sigi_ESLinesMember_D9F6B56A6AD15CC0AE90D349439A9F96" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">E&amp;S Lines [Member]</link:label>
    <link:label id="lab_sigi_ESLinesMember_C6AB1E888F7C266592A99FB6F45AB423_label_en-US" xlink:label="lab_sigi_ESLinesMember_D9F6B56A6AD15CC0AE90D349439A9F96" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">E&amp;S Lines [Member]</link:label>
    <link:label id="lab_sigi_ESLinesMember_C6AB1E888F7C266592A99FB6F45AB423_documentation_en-US" xlink:label="lab_sigi_ESLinesMember_D9F6B56A6AD15CC0AE90D349439A9F96" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents our E&amp;S Lines of business</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ESLinesMember" xlink:label="loc_sigi_ESLinesMember_D9F6B56A6AD15CC0AE90D349439A9F96" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ESLinesMember_D9F6B56A6AD15CC0AE90D349439A9F96" xlink:to="lab_sigi_ESLinesMember_D9F6B56A6AD15CC0AE90D349439A9F96" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_8C063F6068A62B56D7569FB6F45A87A8_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_CAB201CE79D15D6986A0293B11ED2590" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year [Axis]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_8C063F6068A62B56D7569FB6F45A87A8_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_CAB201CE79D15D6986A0293B11ED2590" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYearAxis" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_CAB201CE79D15D6986A0293B11ED2590" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_CAB201CE79D15D6986A0293B11ED2590" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearAxis_CAB201CE79D15D6986A0293B11ED2590" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_EE82A28ADB90183B4E829FB6F45A2CE1_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_54C49C70E58F52A1BF6CE09DD48318D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year [Domain]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_EE82A28ADB90183B4E829FB6F45A2CE1_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_54C49C70E58F52A1BF6CE09DD48318D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYearDomain" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_54C49C70E58F52A1BF6CE09DD48318D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_54C49C70E58F52A1BF6CE09DD48318D3" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYearDomain_54C49C70E58F52A1BF6CE09DD48318D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member_BF721CF53F22C480AA389FB6F45AEE03_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member_509C2125F6EC52008835C10864B5C748" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2008 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member_BF721CF53F22C480AA389FB6F45AEE03_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member_509C2125F6EC52008835C10864B5C748" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2008 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member_509C2125F6EC52008835C10864B5C748" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member_509C2125F6EC52008835C10864B5C748" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2008Member_509C2125F6EC52008835C10864B5C748" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member_6663B6D6AD3447E3B3EC9FB6F45AB661_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member_2E36CBBD13CA57219CD7014B99769291" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2009 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member_6663B6D6AD3447E3B3EC9FB6F45AB661_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member_2E36CBBD13CA57219CD7014B99769291" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2009 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member_2E36CBBD13CA57219CD7014B99769291" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member_2E36CBBD13CA57219CD7014B99769291" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2009Member_2E36CBBD13CA57219CD7014B99769291" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member_24B2969BE6E193ED3F5D9FB6F45AA555_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member_28199836CCEE5AB68661A6AE2B95590E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2010 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member_24B2969BE6E193ED3F5D9FB6F45AA555_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member_28199836CCEE5AB68661A6AE2B95590E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2010 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member_28199836CCEE5AB68661A6AE2B95590E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member_28199836CCEE5AB68661A6AE2B95590E" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2010Member_28199836CCEE5AB68661A6AE2B95590E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member_534F5C17284F4293786E9FB6F45B7452_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member_FF53F04581675A3881B42B70BE9E5CC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2011 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member_534F5C17284F4293786E9FB6F45B7452_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member_FF53F04581675A3881B42B70BE9E5CC5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2011 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member_FF53F04581675A3881B42B70BE9E5CC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member_FF53F04581675A3881B42B70BE9E5CC5" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2011Member_FF53F04581675A3881B42B70BE9E5CC5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member_3730E710CDCA6870E4789FB6F45BC296_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member_76787029B63A5DC5AB90115D6DDBA001" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2012 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member_3730E710CDCA6870E4789FB6F45BC296_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member_76787029B63A5DC5AB90115D6DDBA001" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2012 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member_76787029B63A5DC5AB90115D6DDBA001" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member_76787029B63A5DC5AB90115D6DDBA001" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member_76787029B63A5DC5AB90115D6DDBA001" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member_FFF38AD95085C80CAE209FB6F45BCDA2_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member_A57F636AB9E35F3382496B723645AB31" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2013 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member_FFF38AD95085C80CAE209FB6F45BCDA2_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member_A57F636AB9E35F3382496B723645AB31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2013 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member_A57F636AB9E35F3382496B723645AB31" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member_A57F636AB9E35F3382496B723645AB31" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member_A57F636AB9E35F3382496B723645AB31" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member_0B7AEE4B9084B84E4C389FB6F45BC205_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member_7AB249E6C9F0577CBF200A73B6FDBC45" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2014 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member_0B7AEE4B9084B84E4C389FB6F45BC205_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member_7AB249E6C9F0577CBF200A73B6FDBC45" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2014 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member_7AB249E6C9F0577CBF200A73B6FDBC45" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member_7AB249E6C9F0577CBF200A73B6FDBC45" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member_7AB249E6C9F0577CBF200A73B6FDBC45" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_102AEA8133745EB77E189FB6F45B63C7_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_289E674C0D52570E9AE582B4C55B181E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2015 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_102AEA8133745EB77E189FB6F45B63C7_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_289E674C0D52570E9AE582B4C55B181E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2015 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_289E674C0D52570E9AE582B4C55B181E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_289E674C0D52570E9AE582B4C55B181E" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member_289E674C0D52570E9AE582B4C55B181E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_4D50E948F781E15AA8BA9FB6F45B281A_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_019565E1447759D6B63218107F71434F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2016 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_4D50E948F781E15AA8BA9FB6F45B281A_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_019565E1447759D6B63218107F71434F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2016 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_019565E1447759D6B63218107F71434F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_019565E1447759D6B63218107F71434F" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member_019565E1447759D6B63218107F71434F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member_F80129FF2A23D8932A829FB6F45C0035_terseLabel_en-US" xlink:label="lab_us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member_538483B2822D57479674CEC8C5B49F75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2017 [Member]</link:label>
    <link:label id="lab_us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member_F80129FF2A23D8932A829FB6F45C0035_label_en-US" xlink:label="lab_us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member_538483B2822D57479674CEC8C5B49F75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Accident Year 2017 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member" xlink:label="loc_us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member_538483B2822D57479674CEC8C5B49F75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member_538483B2822D57479674CEC8C5B49F75" xlink:to="lab_us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member_538483B2822D57479674CEC8C5B49F75" xlink:type="arc" />
    <link:label id="lab_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_8229FC5854FBA8DE6E929FB6F45C1920_terseLabel_en-US" xlink:label="lab_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_43D891E92D4750B3BCCB6767C82623F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-Duration Insurance Contracts, Accident Years Prior to 2008 [Member]</link:label>
    <link:label id="lab_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_8229FC5854FBA8DE6E929FB6F45C1920_label_en-US" xlink:label="lab_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_43D891E92D4750B3BCCB6767C82623F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-Duration Insurance Contracts, Accident Years Prior to 2008 [Member]</link:label>
    <link:label id="lab_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_8229FC5854FBA8DE6E929FB6F45C1920_documentation_en-US" xlink:label="lab_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_43D891E92D4750B3BCCB6767C82623F5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accident years prior to 2008 in which a covered event occurs under the terms of the short-duration insurance contract.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member" xlink:label="loc_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_43D891E92D4750B3BCCB6767C82623F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_43D891E92D4750B3BCCB6767C82623F5" xlink:to="lab_sigi_ShortDurationInsuranceContractsAccidentYearsPriorto2008Member_43D891E92D4750B3BCCB6767C82623F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProductOrServiceAxis_EFF945D1AA55B24ABBA49FB6F45C3AAE_terseLabel_en-US" xlink:label="lab_us-gaap_ProductOrServiceAxis_2B65A056783A5E6493A2D6F118DC7ABF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Cause Lines Of Business [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_2B65A056783A5E6493A2D6F118DC7ABF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductOrServiceAxis_2B65A056783A5E6493A2D6F118DC7ABF" xlink:to="lab_us-gaap_ProductOrServiceAxis_2B65A056783A5E6493A2D6F118DC7ABF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProductsAndServicesDomain_55BFF3D6356F466D64009FB6F45CE1E4_terseLabel_en-US" xlink:label="lab_us-gaap_ProductsAndServicesDomain_5F12A52D1CA655A7AA8581318F26F00F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Causes Of Increase Decrease In Liability For Unpaid Claims And Claims Adjustment Expense Cause Lines Of Business [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_5F12A52D1CA655A7AA8581318F26F00F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProductsAndServicesDomain_5F12A52D1CA655A7AA8581318F26F00F" xlink:to="lab_us-gaap_ProductsAndServicesDomain_5F12A52D1CA655A7AA8581318F26F00F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementGeographicalAxis_930E30B55550F9A66A5E9FB6F45C8742_terseLabel_en-US" xlink:label="lab_us-gaap_StatementGeographicalAxis_73E3921CC1CB53B893D4037C045F0B32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementGeographicalAxis_930E30B55550F9A66A5E9FB6F45C8742_label_en-US" xlink:label="lab_us-gaap_StatementGeographicalAxis_73E3921CC1CB53B893D4037C045F0B32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_73E3921CC1CB53B893D4037C045F0B32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementGeographicalAxis_73E3921CC1CB53B893D4037C045F0B32" xlink:to="lab_us-gaap_StatementGeographicalAxis_73E3921CC1CB53B893D4037C045F0B32" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentGeographicalDomain_F40B3EFBE77B4D8761379FB6F45C6BF9_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentGeographicalDomain_9DDF3ECE2D9B58BC967C9370D6C502E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentGeographicalDomain_F40B3EFBE77B4D8761379FB6F45C6BF9_label_en-US" xlink:label="lab_us-gaap_SegmentGeographicalDomain_9DDF3ECE2D9B58BC967C9370D6C502E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_9DDF3ECE2D9B58BC967C9370D6C502E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentGeographicalDomain_9DDF3ECE2D9B58BC967C9370D6C502E3" xlink:to="lab_us-gaap_SegmentGeographicalDomain_9DDF3ECE2D9B58BC967C9370D6C502E3" xlink:type="arc" />
    <link:label id="lab_us-gaap_GeneralLiabilityMember_DD21FDF40FBED6D3243F9FB6F45D74C2_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralLiabilityMember_D385330F808053DC874CDDB0F8A2116F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General Liability [Member]</link:label>
    <link:label id="lab_us-gaap_GeneralLiabilityMember_DD21FDF40FBED6D3243F9FB6F45D74C2_label_en-US" xlink:label="lab_us-gaap_GeneralLiabilityMember_D385330F808053DC874CDDB0F8A2116F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">General Liability [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GeneralLiabilityMember" xlink:label="loc_us-gaap_GeneralLiabilityMember_D385330F808053DC874CDDB0F8A2116F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralLiabilityMember_D385330F808053DC874CDDB0F8A2116F" xlink:to="lab_us-gaap_GeneralLiabilityMember_D385330F808053DC874CDDB0F8A2116F" xlink:type="arc" />
    <link:label id="lab_sigi_WorkersCompensationMember_7F0933730F429DF233179FB6F45D7E41_terseLabel_en-US" xlink:label="lab_sigi_WorkersCompensationMember_D35C239C6A1C5CD0AF1E4E526A1B4B9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Workers Compensation [Member]</link:label>
    <link:label id="lab_sigi_WorkersCompensationMember_7F0933730F429DF233179FB6F45D7E41_label_en-US" xlink:label="lab_sigi_WorkersCompensationMember_D35C239C6A1C5CD0AF1E4E526A1B4B9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Workers Compensation [Member]</link:label>
    <link:label id="lab_sigi_WorkersCompensationMember_7F0933730F429DF233179FB6F45D7E41_documentation_en-US" xlink:label="lab_sigi_WorkersCompensationMember_D35C239C6A1C5CD0AF1E4E526A1B4B9E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance coverage provided to policy holders for workers compensation.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_WorkersCompensationMember" xlink:label="loc_sigi_WorkersCompensationMember_D35C239C6A1C5CD0AF1E4E526A1B4B9E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_WorkersCompensationMember_D35C239C6A1C5CD0AF1E4E526A1B4B9E" xlink:to="lab_sigi_WorkersCompensationMember_D35C239C6A1C5CD0AF1E4E526A1B4B9E" xlink:type="arc" />
    <link:label id="lab_sigi_CommercialAutomobileMember_E23AF168F87B4E2668FA9FB6F45D4515_terseLabel_en-US" xlink:label="lab_sigi_CommercialAutomobileMember_CCC6F80FE2E95A3D819333301C718B76" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial Automobile [Member]</link:label>
    <link:label id="lab_sigi_CommercialAutomobileMember_E23AF168F87B4E2668FA9FB6F45D4515_label_en-US" xlink:label="lab_sigi_CommercialAutomobileMember_CCC6F80FE2E95A3D819333301C718B76" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Automobile [Member]</link:label>
    <link:label id="lab_sigi_CommercialAutomobileMember_E23AF168F87B4E2668FA9FB6F45D4515_documentation_en-US" xlink:label="lab_sigi_CommercialAutomobileMember_CCC6F80FE2E95A3D819333301C718B76" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance coverage provided to policy holders on commercial automobiles.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_CommercialAutomobileMember" xlink:label="loc_sigi_CommercialAutomobileMember_CCC6F80FE2E95A3D819333301C718B76" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_CommercialAutomobileMember_CCC6F80FE2E95A3D819333301C718B76" xlink:to="lab_sigi_CommercialAutomobileMember_CCC6F80FE2E95A3D819333301C718B76" xlink:type="arc" />
    <link:label id="lab_sigi_BusinessOwnersPoliciesMember_B24BBA15F75905216DC59FB6F45DCC4C_terseLabel_en-US" xlink:label="lab_sigi_BusinessOwnersPoliciesMember_B70AE1372CC55B2D9A8EBE08AFA2D778" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Owners' Policies [Member]</link:label>
    <link:label id="lab_sigi_BusinessOwnersPoliciesMember_B24BBA15F75905216DC59FB6F45DCC4C_label_en-US" xlink:label="lab_sigi_BusinessOwnersPoliciesMember_B70AE1372CC55B2D9A8EBE08AFA2D778" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Owners Policies [Member]</link:label>
    <link:label id="lab_sigi_BusinessOwnersPoliciesMember_B24BBA15F75905216DC59FB6F45DCC4C_documentation_en-US" xlink:label="lab_sigi_BusinessOwnersPoliciesMember_B70AE1372CC55B2D9A8EBE08AFA2D778" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance coverage provided for business owners' policies</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_BusinessOwnersPoliciesMember" xlink:label="loc_sigi_BusinessOwnersPoliciesMember_B70AE1372CC55B2D9A8EBE08AFA2D778" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_BusinessOwnersPoliciesMember_B70AE1372CC55B2D9A8EBE08AFA2D778" xlink:to="lab_sigi_BusinessOwnersPoliciesMember_B70AE1372CC55B2D9A8EBE08AFA2D778" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember_EB0DF80A819ACC162B939FB6F45DBAFD_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember_8FE9AB2FBC475C04944535E695B93AA1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial Property [Member]</link:label>
    <link:label id="lab_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember_EB0DF80A819ACC162B939FB6F45DBAFD_label_en-US" xlink:label="lab_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember_8FE9AB2FBC475C04944535E695B93AA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property and Casualty, Commercial Insurance Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember" xlink:label="loc_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember_8FE9AB2FBC475C04944535E695B93AA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember_8FE9AB2FBC475C04944535E695B93AA1" xlink:to="lab_us-gaap_PropertyAndCasualtyCommercialInsuranceProductLineMember_8FE9AB2FBC475C04944535E695B93AA1" xlink:type="arc" />
    <link:label id="lab_sigi_PersonalAutomobileMember_5A48D3D7008E48ABBFF39FB6F45DC620_terseLabel_en-US" xlink:label="lab_sigi_PersonalAutomobileMember_3733292A70775D5D9C576748A16A6F44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Personal Automobile [Member]</link:label>
    <link:label id="lab_sigi_PersonalAutomobileMember_5A48D3D7008E48ABBFF39FB6F45DC620_label_en-US" xlink:label="lab_sigi_PersonalAutomobileMember_3733292A70775D5D9C576748A16A6F44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Personal Automobile [Member]</link:label>
    <link:label id="lab_sigi_PersonalAutomobileMember_5A48D3D7008E48ABBFF39FB6F45DC620_documentation_en-US" xlink:label="lab_sigi_PersonalAutomobileMember_3733292A70775D5D9C576748A16A6F44" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance coverage provided to policy holders on personal automobiles.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PersonalAutomobileMember" xlink:label="loc_sigi_PersonalAutomobileMember_3733292A70775D5D9C576748A16A6F44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PersonalAutomobileMember_3733292A70775D5D9C576748A16A6F44" xlink:to="lab_sigi_PersonalAutomobileMember_3733292A70775D5D9C576748A16A6F44" xlink:type="arc" />
    <link:label id="lab_sigi_HomeownersMember_0B20F903D4FB875FB3249FB6F45D933F_terseLabel_en-US" xlink:label="lab_sigi_HomeownersMember_1D7C61DA28F7591A979485C56EF5F341" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Homeowners [Member]</link:label>
    <link:label id="lab_sigi_HomeownersMember_0B20F903D4FB875FB3249FB6F45D933F_label_en-US" xlink:label="lab_sigi_HomeownersMember_1D7C61DA28F7591A979485C56EF5F341" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Homeowners [Member]</link:label>
    <link:label id="lab_sigi_HomeownersMember_0B20F903D4FB875FB3249FB6F45D933F_documentation_en-US" xlink:label="lab_sigi_HomeownersMember_1D7C61DA28F7591A979485C56EF5F341" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance coverage provided to policy holders on dwellings.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_HomeownersMember" xlink:label="loc_sigi_HomeownersMember_1D7C61DA28F7591A979485C56EF5F341" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_HomeownersMember_1D7C61DA28F7591A979485C56EF5F341" xlink:to="lab_sigi_HomeownersMember_1D7C61DA28F7591A979485C56EF5F341" xlink:type="arc" />
    <link:label id="lab_us-gaap_MajorCustomersAxis_9C1E703D1D9E12C828F29FB6F45DFE6C_terseLabel_en-US" xlink:label="lab_us-gaap_MajorCustomersAxis_BD66F5A5A1C4594D9E552049BDA18607" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:label id="lab_us-gaap_MajorCustomersAxis_9C1E703D1D9E12C828F29FB6F45DFE6C_label_en-US" xlink:label="lab_us-gaap_MajorCustomersAxis_BD66F5A5A1C4594D9E552049BDA18607" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MajorCustomersAxis" xlink:label="loc_us-gaap_MajorCustomersAxis_BD66F5A5A1C4594D9E552049BDA18607" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MajorCustomersAxis_BD66F5A5A1C4594D9E552049BDA18607" xlink:to="lab_us-gaap_MajorCustomersAxis_BD66F5A5A1C4594D9E552049BDA18607" xlink:type="arc" />
    <link:label id="lab_us-gaap_NameOfMajorCustomerDomain_701A307D2C6A738F6AAB9FB6F45D0D42_terseLabel_en-US" xlink:label="lab_us-gaap_NameOfMajorCustomerDomain_5F4C1D11AACA5171BEC23D24C91D9E57" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:label id="lab_us-gaap_NameOfMajorCustomerDomain_701A307D2C6A738F6AAB9FB6F45D0D42_label_en-US" xlink:label="lab_us-gaap_NameOfMajorCustomerDomain_5F4C1D11AACA5171BEC23D24C91D9E57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NameOfMajorCustomerDomain" xlink:label="loc_us-gaap_NameOfMajorCustomerDomain_5F4C1D11AACA5171BEC23D24C91D9E57" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NameOfMajorCustomerDomain_5F4C1D11AACA5171BEC23D24C91D9E57" xlink:to="lab_us-gaap_NameOfMajorCustomerDomain_5F4C1D11AACA5171BEC23D24C91D9E57" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationAxis_68CD654957C75B7E4AD69FB6F45D70BD_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationAxis_569BFB3ECD28572789857D533DF27E5F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claim Duration [Axis]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationAxis_68CD654957C75B7E4AD69FB6F45D70BD_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationAxis_569BFB3ECD28572789857D533DF27E5F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claim Duration [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsClaimDurationAxis" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsClaimDurationAxis_569BFB3ECD28572789857D533DF27E5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsClaimDurationAxis_569BFB3ECD28572789857D533DF27E5F" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationAxis_569BFB3ECD28572789857D533DF27E5F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationDomain_36647AE89D79A05C29639FB6F45D8873_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationDomain_D1E5C63705F25B23B179817D664100C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claim Duration [Domain]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationDomain_36647AE89D79A05C29639FB6F45D8873_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationDomain_D1E5C63705F25B23B179817D664100C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claim Duration [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsClaimDurationDomain" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsClaimDurationDomain_D1E5C63705F25B23B179817D664100C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsClaimDurationDomain_D1E5C63705F25B23B179817D664100C1" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsClaimDurationDomain_D1E5C63705F25B23B179817D664100C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ClaimsDevelopmentLineItems_C0AB5D0627D516621A5C9FB6F45DDFFE_terseLabel_en-US" xlink:label="lab_us-gaap_ClaimsDevelopmentLineItems_3F312A2647865B2AA168E82E78842417" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Claims Development [Line Items]</link:label>
    <link:label id="lab_us-gaap_ClaimsDevelopmentLineItems_C0AB5D0627D516621A5C9FB6F45DDFFE_label_en-US" xlink:label="lab_us-gaap_ClaimsDevelopmentLineItems_3F312A2647865B2AA168E82E78842417" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Claims Development [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClaimsDevelopmentLineItems" xlink:label="loc_us-gaap_ClaimsDevelopmentLineItems_3F312A2647865B2AA168E82E78842417" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClaimsDevelopmentLineItems_3F312A2647865B2AA168E82E78842417" xlink:to="lab_us-gaap_ClaimsDevelopmentLineItems_3F312A2647865B2AA168E82E78842417" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_5C91B39565FD1C4D3D0A9FB6F45DDFF1_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_7FE7CCEDF3B55BB1911541530D496FD9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Reserve for loss and loss expense</link:label>
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_5C91B39565FD1C4D3D0A9FB6F45DDFF1_label_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_7FE7CCEDF3B55BB1911541530D496FD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Claims and Claims Adjustment Expense, Property Casualty Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_7FE7CCEDF3B55BB1911541530D496FD9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_7FE7CCEDF3B55BB1911541530D496FD9" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_7FE7CCEDF3B55BB1911541530D496FD9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet_91EA3B0214FCAE763F7D9FB6F45EB10F_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet_03572E17896B5A2588C45FC0E338556E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet_91EA3B0214FCAE763F7D9FB6F45EB10F_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet_03572E17896B5A2588C45FC0E338556E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet_03572E17896B5A2588C45FC0E338556E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet_03572E17896B5A2588C45FC0E338556E" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet_03572E17896B5A2588C45FC0E338556E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_A69EF0834E56B300C1979FB6F45ED4F0_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_F63DBBD0534158B68DA24ECAAB931CDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net outstanding liabilities</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_A69EF0834E56B300C1979FB6F45ED4F0_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_F63DBBD0534158B68DA24ECAAB931CDE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_F63DBBD0534158B68DA24ECAAB931CDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_F63DBBD0534158B68DA24ECAAB931CDE" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet_F63DBBD0534158B68DA24ECAAB931CDE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet_5922E8ED5B62C87396C49FB6F45E50EA_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet_D642A31A1BB0584389338E5125155E06" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet_5922E8ED5B62C87396C49FB6F45E50EA_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet_D642A31A1BB0584389338E5125155E06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet_D642A31A1BB0584389338E5125155E06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet_D642A31A1BB0584389338E5125155E06" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet_D642A31A1BB0584389338E5125155E06" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims_C6EF047FC6679A4C6D029FB6F45EFF8D_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims_560576637679516D8A7C6D0682A7CF9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Number of Reported Claims</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims_C6EF047FC6679A4C6D029FB6F45EFF8D_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims_560576637679516D8A7C6D0682A7CF9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Number of Reported Claims</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims_560576637679516D8A7C6D0682A7CF9E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims_560576637679516D8A7C6D0682A7CF9E" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsNumberOfReportedClaims_560576637679516D8A7C6D0682A7CF9E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_0236D265BB8B5392AB959FB6F45E8BC7_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_54A10120DFA455B28BBE12574D3C8359" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Net</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_0236D265BB8B5392AB959FB6F45E8BC7_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_54A10120DFA455B28BBE12574D3C8359" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_54A10120DFA455B28BBE12574D3C8359" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_54A10120DFA455B28BBE12574D3C8359" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet_54A10120DFA455B28BBE12574D3C8359" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetBackedSecuritiesMember_25AC11B8218D4B9E291E101EE530BD8B_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesMember_BD5EC961C6505F9E9E90D36B45E6456A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Collateralized Loan Obligations and Other Asset-Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_BD5EC961C6505F9E9E90D36B45E6456A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetBackedSecuritiesMember_BD5EC961C6505F9E9E90D36B45E6456A" xlink:to="lab_us-gaap_AssetBackedSecuritiesMember_BD5EC961C6505F9E9E90D36B45E6456A" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment_735175F896D32408A114101EE530E9BF_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment_B500E72342205F8192CE14C92D1FD0E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortized Cost</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment_735175F896D32408A114101EE530E9BF_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment_B500E72342205F8192CE14C92D1FD0E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment_B500E72342205F8192CE14C92D1FD0E0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment_B500E72342205F8192CE14C92D1FD0E0" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesAmortizedCostBeforeOtherThanTemporaryImpairment_B500E72342205F8192CE14C92D1FD0E0" xlink:type="arc" />
    <link:label id="lab_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3A89DA0FD6937F545F89101EE53055A7_verboseLabel_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3EE9EAB7447A5928A8D998B51A0505D0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net Unrealized Gains (Losses)</link:label>
    <link:label id="lab_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3A89DA0FD6937F545F89101EE53055A7_label_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3EE9EAB7447A5928A8D998B51A0505D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held To Maturity Securities Net Unrealized Gains Losses</link:label>
    <link:label id="lab_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3A89DA0FD6937F545F89101EE53055A7_documentation_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3EE9EAB7447A5928A8D998B51A0505D0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The remaining aggregate increase (decrease) in the market value of held-to-maturity securities either (i) prior to the securities' transfer to a held-to-maturity designation or (ii) resulting from a non-credit other-than-temporary impairment.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses" xlink:label="loc_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3EE9EAB7447A5928A8D998B51A0505D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3EE9EAB7447A5928A8D998B51A0505D0" xlink:to="lab_sigi_HeldToMaturitySecuritiesNetUnrealizedGainsLosses_3EE9EAB7447A5928A8D998B51A0505D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_99D6CB1EE9F9FBDAD48E101EE5302F46_verboseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_86803D99706A526A9C225AE4021847D4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Unrecognized Holding Gains</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_99D6CB1EE9F9FBDAD48E101EE5302F46_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_86803D99706A526A9C225AE4021847D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Accumulated Unrecognized Holding Gain</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_86803D99706A526A9C225AE4021847D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_86803D99706A526A9C225AE4021847D4" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_86803D99706A526A9C225AE4021847D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_58B0CE80CE89FEE40386101EE5318F6E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_F03E18AF760B599A8B29CAF88BDAB9FF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unrecognized Holding Losses</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_58B0CE80CE89FEE40386101EE5318F6E_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_F03E18AF760B599A8B29CAF88BDAB9FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Accumulated Unrecognized Holding Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_F03E18AF760B599A8B29CAF88BDAB9FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_F03E18AF760B599A8B29CAF88BDAB9FF" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_F03E18AF760B599A8B29CAF88BDAB9FF" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesFairValue_6D309509FE8335F37F9E101EE531DB72_verboseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesFairValue_987FD79AE7C95AD7A98EE0057AFD97D5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total HTM fixed income securities fair value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_987FD79AE7C95AD7A98EE0057AFD97D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_987FD79AE7C95AD7A98EE0057AFD97D5" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesFairValue_987FD79AE7C95AD7A98EE0057AFD97D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventsAbstract_FF8D5A11C444EDA45CB7B0CCD26A3356_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsAbstract_A01C50812CB75A5988879D6FA18A814F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_A01C50812CB75A5988879D6FA18A814F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsAbstract_A01C50812CB75A5988879D6FA18A814F" xlink:to="lab_us-gaap_SubsequentEventsAbstract_A01C50812CB75A5988879D6FA18A814F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense_2BEC23646978FFED9A869FB6F290340B_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense_41E6274FF72351A39AA19CA967805A0B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Roll Forward of Reserve for Loss and Loss Expense</link:label>
    <link:label id="lab_us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense_2BEC23646978FFED9A869FB6F290340B_label_en-US" xlink:label="lab_us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense_41E6274FF72351A39AA19CA967805A0B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense_41E6274FF72351A39AA19CA967805A0B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense_41E6274FF72351A39AA19CA967805A0B" xlink:to="lab_us-gaap_ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense_41E6274FF72351A39AA19CA967805A0B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock_5CB5B2D5C08367D1E6719FB6F2909D30_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock_23946926B77F57959C7830CF02D0B169" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of (Favorable)/ Unfavorable Prior Year Development</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock_5CB5B2D5C08367D1E6719FB6F2909D30_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock_23946926B77F57959C7830CF02D0B169" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock" xlink:label="loc_us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock_23946926B77F57959C7830CF02D0B169" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock_23946926B77F57959C7830CF02D0B169" xlink:to="lab_us-gaap_ScheduleOfCausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTextBlock_23946926B77F57959C7830CF02D0B169" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_03950198DFCB4BA160E09FB6F290FB98_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_E896D4179BB95C1BBED68058ECE52E06" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Exposure to Various Asbestos and Environmental Claims</link:label>
    <link:label id="lab_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_03950198DFCB4BA160E09FB6F290FB98_label_en-US" xlink:label="lab_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_E896D4179BB95C1BBED68058ECE52E06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Exposure To Environmental Claims [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_03950198DFCB4BA160E09FB6F290FB98_documentation_en-US" xlink:label="lab_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_E896D4179BB95C1BBED68058ECE52E06" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of the company's exposure to environmental claims, on a gross and net basis.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock" xlink:label="loc_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_E896D4179BB95C1BBED68058ECE52E06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_E896D4179BB95C1BBED68058ECE52E06" xlink:to="lab_sigi_ScheduleOfExposureToEnvironmentalClaimsTableTextBlock_E896D4179BB95C1BBED68058ECE52E06" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_5A97FAA97662F3939FF89FB6F290DB81_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_2A27403FB89B5048A087EABEC866BAAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Roll Forward of Gross and Net Asbestos and Environmental Incurred Losses and Loss Expenses and Related Reserves</link:label>
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_5A97FAA97662F3939FF89FB6F290DB81_label_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_2A27403FB89B5048A087EABEC866BAAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Liability For Unpaid Environmental Claims And Claims Adjustment Expense [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_5A97FAA97662F3939FF89FB6F290DB81_documentation_en-US" xlink:label="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_2A27403FB89B5048A087EABEC866BAAC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of the activity in the environmental reserve for settling insured claims and expenses incurred in the claims settlement process for the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock" xlink:label="loc_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_2A27403FB89B5048A087EABEC866BAAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_2A27403FB89B5048A087EABEC866BAAC" xlink:to="lab_sigi_ScheduleOfLiabilityForUnpaidEnvironmentalClaimsAndClaimsAdjustmentExpenseTableTextBlock_2A27403FB89B5048A087EABEC866BAAC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock_559F344CE44B691242B49FB6F2918986_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock_B9AEFD2CACC0585B8EA19ABE7A366CAA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claims Development [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock_559F344CE44B691242B49FB6F2918986_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock_B9AEFD2CACC0585B8EA19ABE7A366CAA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Claims Development [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock_B9AEFD2CACC0585B8EA19ABE7A366CAA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock_B9AEFD2CACC0585B8EA19ABE7A366CAA" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsClaimsDevelopmentTableTextBlock_B9AEFD2CACC0585B8EA19ABE7A366CAA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock_95DC0526DEE261AB62C49FB6F2910D21_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock_042996B2CBAA5F98A50B0D38309F49BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock_95DC0526DEE261AB62C49FB6F2910D21_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock_042996B2CBAA5F98A50B0D38309F49BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock_042996B2CBAA5F98A50B0D38309F49BD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock_042996B2CBAA5F98A50B0D38309F49BD" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTableTextBlock_042996B2CBAA5F98A50B0D38309F49BD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock_5057F05AA74163326C1F9FB6F29173E7_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock_3CD21A31E28E5FFE88639381A44B0966" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Schedule of Historical Claims Duration [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock_5057F05AA74163326C1F9FB6F29173E7_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock_3CD21A31E28E5FFE88639381A44B0966" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Schedule of Historical Claims Duration [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock_3CD21A31E28E5FFE88639381A44B0966" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock_3CD21A31E28E5FFE88639381A44B0966" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsScheduleOfHistoricalClaimsDurationTableTextBlock_3CD21A31E28E5FFE88639381A44B0966" xlink:type="arc" />
    <link:label id="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_FF0960189A23B2030AC3101EE3CBC044_label_en-US" xlink:label="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_21C7E966280654A8B5218A9B64E4F14D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quarterly Financial Information Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_21C7E966280654A8B5218A9B64E4F14D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_21C7E966280654A8B5218A9B64E4F14D" xlink:to="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_21C7E966280654A8B5218A9B64E4F14D" xlink:type="arc" />
    <link:label id="lab_us-gaap_QuarterlyFinancialInformationTextBlock_368939B47202688791E2101EE3CB9A76_terseLabel_en-US" xlink:label="lab_us-gaap_QuarterlyFinancialInformationTextBlock_7A01C48596FE56B4B8B0968487E6EF0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Quarterly Financial Information</link:label>
    <link:label id="lab_us-gaap_QuarterlyFinancialInformationTextBlock_368939B47202688791E2101EE3CB9A76_label_en-US" xlink:label="lab_us-gaap_QuarterlyFinancialInformationTextBlock_7A01C48596FE56B4B8B0968487E6EF0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quarterly Financial Information [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="loc_us-gaap_QuarterlyFinancialInformationTextBlock_7A01C48596FE56B4B8B0968487E6EF0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QuarterlyFinancialInformationTextBlock_7A01C48596FE56B4B8B0968487E6EF0A" xlink:to="lab_us-gaap_QuarterlyFinancialInformationTextBlock_7A01C48596FE56B4B8B0968487E6EF0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_InsuranceAbstract_08198365A21926FF12C4A02D3EF33D1E_label_en-US" xlink:label="lab_us-gaap_InsuranceAbstract_8AE4DE0CBBCF5C1F981CBDDBAD47001C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InsuranceAbstract" xlink:label="loc_us-gaap_InsuranceAbstract_8AE4DE0CBBCF5C1F981CBDDBAD47001C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InsuranceAbstract_8AE4DE0CBBCF5C1F981CBDDBAD47001C" xlink:to="lab_us-gaap_InsuranceAbstract_8AE4DE0CBBCF5C1F981CBDDBAD47001C" xlink:type="arc" />
    <link:label id="lab_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_5DD4A7821B69C7B0EDDAA02D3EF328E5_terseLabel_en-US" xlink:label="lab_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_04DA86CBB16656BB9ADE0EEBB87F2B44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Insurance Subsidiaries Statutory Surplus Data</link:label>
    <link:label id="lab_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_5DD4A7821B69C7B0EDDAA02D3EF328E5_label_en-US" xlink:label="lab_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_04DA86CBB16656BB9ADE0EEBB87F2B44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance Subsidiaries Statutory Surplus Data [Table Text Block]</link:label>
    <link:label id="lab_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_5DD4A7821B69C7B0EDDAA02D3EF328E5_documentation_en-US" xlink:label="lab_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_04DA86CBB16656BB9ADE0EEBB87F2B44" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of incurance subsidiaries' statutory surplus, unassigned surplus and statutory net income.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock" xlink:label="loc_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_04DA86CBB16656BB9ADE0EEBB87F2B44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_04DA86CBB16656BB9ADE0EEBB87F2B44" xlink:to="lab_sigi_InsuranceSubsidiariesStatutorySurplusDataTableTextBlock_04DA86CBB16656BB9ADE0EEBB87F2B44" xlink:type="arc" />
    <link:label id="lab_sigi_DividendPaidToParentTableTextBlock_B2343A962BC9569D41DEA02D3EF45DEE_terseLabel_en-US" xlink:label="lab_sigi_DividendPaidToParentTableTextBlock_DC0FB4E875D259E2B4B345AAFCC2E923" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Insurance Subsidiaries Dividend Paid To Parent</link:label>
    <link:label id="lab_sigi_DividendPaidToParentTableTextBlock_B2343A962BC9569D41DEA02D3EF45DEE_label_en-US" xlink:label="lab_sigi_DividendPaidToParentTableTextBlock_DC0FB4E875D259E2B4B345AAFCC2E923" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Paid To Parent [Table Text Block]</link:label>
    <link:label id="lab_sigi_DividendPaidToParentTableTextBlock_B2343A962BC9569D41DEA02D3EF45DEE_documentation_en-US" xlink:label="lab_sigi_DividendPaidToParentTableTextBlock_DC0FB4E875D259E2B4B345AAFCC2E923" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of the dividends paid to the Parent by a Subsidiary.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DividendPaidToParentTableTextBlock" xlink:label="loc_sigi_DividendPaidToParentTableTextBlock_DC0FB4E875D259E2B4B345AAFCC2E923" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DividendPaidToParentTableTextBlock_DC0FB4E875D259E2B4B345AAFCC2E923" xlink:to="lab_sigi_DividendPaidToParentTableTextBlock_DC0FB4E875D259E2B4B345AAFCC2E923" xlink:type="arc" />
    <link:label id="lab_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_09E495D00223A0637ADAA02D3EF5FA8B_terseLabel_en-US" xlink:label="lab_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_3E7CF339BA655C1B9E04B23CEC07272C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Maximum Ordinary Dividends Paid to Parent by Insurance Subsidiaries</link:label>
    <link:label id="lab_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_09E495D00223A0637ADAA02D3EF5FA8B_label_en-US" xlink:label="lab_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_3E7CF339BA655C1B9E04B23CEC07272C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Payments Of Ordinary Dividends Text Block</link:label>
    <link:label id="lab_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_09E495D00223A0637ADAA02D3EF5FA8B_documentation_en-US" xlink:label="lab_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_3E7CF339BA655C1B9E04B23CEC07272C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of the maximum ordinary dividends that can by paid to the Parent by a Subsidiary.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock" xlink:label="loc_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_3E7CF339BA655C1B9E04B23CEC07272C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_3E7CF339BA655C1B9E04B23CEC07272C" xlink:to="lab_sigi_MaximumPaymentsOfOrdinaryDividendsTextBlock_3E7CF339BA655C1B9E04B23CEC07272C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F7C991310487A94FAF57101EE4FBA040_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ACCE72E62A455E669DFF414905B424EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_F7C991310487A94FAF57101EE4FBA040_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ACCE72E62A455E669DFF414905B424EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ACCE72E62A455E669DFF414905B424EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ACCE72E62A455E669DFF414905B424EF" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ACCE72E62A455E669DFF414905B424EF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AwardTypeAxis_A611D36390A98DCD8421101EE4FB2C49_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_04570EDDBA0C5C28B1C767168DD71903" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AwardTypeAxis_A611D36390A98DCD8421101EE4FB2C49_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_04570EDDBA0C5C28B1C767168DD71903" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_04570EDDBA0C5C28B1C767168DD71903" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AwardTypeAxis_04570EDDBA0C5C28B1C767168DD71903" xlink:to="lab_us-gaap_AwardTypeAxis_04570EDDBA0C5C28B1C767168DD71903" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_CC511F29392E1B452032101EE4FB16B4_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2CAB3A74D6256A0BCC6883398BCA500" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_CC511F29392E1B452032101EE4FB16B4_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2CAB3A74D6256A0BCC6883398BCA500" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Award [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2CAB3A74D6256A0BCC6883398BCA500" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2CAB3A74D6256A0BCC6883398BCA500" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F2CAB3A74D6256A0BCC6883398BCA500" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedStockUnitsRSUMember_01B5681DD3D7D20C202F101EE4FB970A_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockUnitsRSUMember_3DC292815DB153C8B30B1FCB433F84C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted Stock Units (RSUs) [Member]</link:label>
    <link:label id="lab_us-gaap_RestrictedStockUnitsRSUMember_01B5681DD3D7D20C202F101EE4FB970A_label_en-US" xlink:label="lab_us-gaap_RestrictedStockUnitsRSUMember_3DC292815DB153C8B30B1FCB433F84C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Stock Units (RSUs) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_3DC292815DB153C8B30B1FCB433F84C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedStockUnitsRSUMember_3DC292815DB153C8B30B1FCB433F84C9" xlink:to="lab_us-gaap_RestrictedStockUnitsRSUMember_3DC292815DB153C8B30B1FCB433F84C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeStockMember_52D005E1FB1C2213341C101EE4FBD7BF_verboseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockMember_EF9C8A4AFD5C5197BCFA6248AFF76DF2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Employee Stock Purchase Plan [Member]</link:label>
    <link:label id="lab_us-gaap_EmployeeStockMember_52D005E1FB1C2213341C101EE4FBD7BF_label_en-US" xlink:label="lab_us-gaap_EmployeeStockMember_EF9C8A4AFD5C5197BCFA6248AFF76DF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_EF9C8A4AFD5C5197BCFA6248AFF76DF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeStockMember_EF9C8A4AFD5C5197BCFA6248AFF76DF2" xlink:to="lab_us-gaap_EmployeeStockMember_EF9C8A4AFD5C5197BCFA6248AFF76DF2" xlink:type="arc" />
    <link:label id="lab_sigi_AgentStockPurchasePlanMember_7F386B6F4A8D69B5AFD7101EE4FBD6B5_terseLabel_en-US" xlink:label="lab_sigi_AgentStockPurchasePlanMember_864E77F94BCF56AD8DC42CDF491E1739" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agent Stock Purchase Plan [Member]</link:label>
    <link:label id="lab_sigi_AgentStockPurchasePlanMember_7F386B6F4A8D69B5AFD7101EE4FBD6B5_label_en-US" xlink:label="lab_sigi_AgentStockPurchasePlanMember_864E77F94BCF56AD8DC42CDF491E1739" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agent Stock Purchase Plan [Member]</link:label>
    <link:label id="lab_sigi_AgentStockPurchasePlanMember_7F386B6F4A8D69B5AFD7101EE4FBD6B5_documentation_en-US" xlink:label="lab_sigi_AgentStockPurchasePlanMember_864E77F94BCF56AD8DC42CDF491E1739" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The company's agent stock purchase plan which provides for quarterly offerings in which independent insurance agencies, and certain eligible persons associated with the agencies can purchase the Parent's common stock.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AgentStockPurchasePlanMember" xlink:label="loc_sigi_AgentStockPurchasePlanMember_864E77F94BCF56AD8DC42CDF491E1739" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AgentStockPurchasePlanMember_864E77F94BCF56AD8DC42CDF491E1739" xlink:to="lab_sigi_AgentStockPurchasePlanMember_864E77F94BCF56AD8DC42CDF491E1739" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_8581A40B39A3CF2C60AF101EE4FB1E0D_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_33E478C0F8425A909FA6ADC9C69E7AC1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Stock, weighted average grant date fair value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_8581A40B39A3CF2C60AF101EE4FB1E0D_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_33E478C0F8425A909FA6ADC9C69E7AC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_33E478C0F8425A909FA6ADC9C69E7AC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_33E478C0F8425A909FA6ADC9C69E7AC1" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_33E478C0F8425A909FA6ADC9C69E7AC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B500E855D09959BA55A3101EE4FBAF73_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4BE1226C558458A59E5A145ACE53E218" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Options, weighted average grant date fair value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_B500E855D09959BA55A3101EE4FBAF73_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4BE1226C558458A59E5A145ACE53E218" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4BE1226C558458A59E5A145ACE53E218" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4BE1226C558458A59E5A145ACE53E218" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4BE1226C558458A59E5A145ACE53E218" xlink:type="arc" />
    <link:label id="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_AC8C20BBC9DEEB57B704101EE4FBD9D2_terseLabel_en-US" xlink:label="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_41ABCF1E1D55566DB983D44B2D1934D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">15% of grant date market value</link:label>
    <link:label id="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_AC8C20BBC9DEEB57B704101EE4FBD9D2_label_en-US" xlink:label="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_41ABCF1E1D55566DB983D44B2D1934D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Employee Stock Purchase Plan Grants In Period Weighted Average Grant Date Fair Value</link:label>
    <link:label id="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_AC8C20BBC9DEEB57B704101EE4FBD9D2_documentation_en-US" xlink:label="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_41ABCF1E1D55566DB983D44B2D1934D0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The weighted average fair value discount at grant date, for employee stock purchase plan shares issued during the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_41ABCF1E1D55566DB983D44B2D1934D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_41ABCF1E1D55566DB983D44B2D1934D0" xlink:to="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValue_41ABCF1E1D55566DB983D44B2D1934D0" xlink:type="arc" />
    <link:label id="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_D86E68380848FF68345E101EE4FBA9F4_terseLabel_en-US" xlink:label="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_0DCE8E6857785CC080F46DEDAAD760F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total ESPP</link:label>
    <link:label id="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_D86E68380848FF68345E101EE4FBA9F4_label_en-US" xlink:label="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_0DCE8E6857785CC080F46DEDAAD760F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Employee Stock Purchase Plan Grants In Period Weighted Average Grant Date Fair Value Total</link:label>
    <link:label id="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_D86E68380848FF68345E101EE4FBA9F4_documentation_en-US" xlink:label="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_0DCE8E6857785CC080F46DEDAAD760F2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The total weighted average fair value at grant date for employee stock purchase plan shares issued during the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal" xlink:label="loc_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_0DCE8E6857785CC080F46DEDAAD760F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_0DCE8E6857785CC080F46DEDAAD760F2" xlink:to="lab_sigi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsEmployeeStockPurchasePlanGrantsInPeriodWeightedAverageGrantDateFairValueTotal_0DCE8E6857785CC080F46DEDAAD760F2" xlink:type="arc" />
    <link:label id="lab_sigi_RealizedGainLossOnInvestmentsTable_2FBDE43FA3D84905CA27B09BEF72DA63_terseLabel_en-US" xlink:label="lab_sigi_RealizedGainLossOnInvestmentsTable_B6DAFB0F6C1B5A79AFDD5FF60798BFF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Realized Gain Loss On Investments [Table]</link:label>
    <link:label id="lab_sigi_RealizedGainLossOnInvestmentsTable_2FBDE43FA3D84905CA27B09BEF72DA63_label_en-US" xlink:label="lab_sigi_RealizedGainLossOnInvestmentsTable_B6DAFB0F6C1B5A79AFDD5FF60798BFF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Gain Loss On Investments [Table]</link:label>
    <link:label id="lab_sigi_RealizedGainLossOnInvestmentsTable_2FBDE43FA3D84905CA27B09BEF72DA63_documentation_en-US" xlink:label="lab_sigi_RealizedGainLossOnInvestmentsTable_B6DAFB0F6C1B5A79AFDD5FF60798BFF4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of realized gains and losses on investments reported in the statement of income.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RealizedGainLossOnInvestmentsTable" xlink:label="loc_sigi_RealizedGainLossOnInvestmentsTable_B6DAFB0F6C1B5A79AFDD5FF60798BFF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RealizedGainLossOnInvestmentsTable_B6DAFB0F6C1B5A79AFDD5FF60798BFF4" xlink:to="lab_sigi_RealizedGainLossOnInvestmentsTable_B6DAFB0F6C1B5A79AFDD5FF60798BFF4" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_2D23F8BC9F2845CBA711B09BEF823C33_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_553E4B2587AF5F67AA1A7EB89D017B63" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_2D23F8BC9F2845CBA711B09BEF823C33_label_en-US" xlink:label="lab_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_553E4B2587AF5F67AA1A7EB89D017B63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Available-For-Sale and Held-To-Maturity [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_2D23F8BC9F2845CBA711B09BEF823C33_documentation_en-US" xlink:label="lab_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_553E4B2587AF5F67AA1A7EB89D017B63" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems" xlink:label="loc_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_553E4B2587AF5F67AA1A7EB89D017B63" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_553E4B2587AF5F67AA1A7EB89D017B63" xlink:to="lab_sigi_ScheduleofAvailableForSaleandHeldToMaturityLineItems_553E4B2587AF5F67AA1A7EB89D017B63" xlink:type="arc" />
    <link:label id="lab_sigi_HeldToMaturitySecuritiesRealizedGain_8294AA62B4D78818B569B09BEF82388A_terseLabel_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesRealizedGain_B5479F57C20E5C4E8649A1C9667D4591" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">HTM fixed income securities gains</link:label>
    <link:label id="lab_sigi_HeldToMaturitySecuritiesRealizedGain_8294AA62B4D78818B569B09BEF82388A_label_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesRealizedGain_B5479F57C20E5C4E8649A1C9667D4591" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held To Maturity Securities Realized Gain</link:label>
    <link:label id="lab_sigi_HeldToMaturitySecuritiesRealizedGain_8294AA62B4D78818B569B09BEF82388A_documentation_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesRealizedGain_B5479F57C20E5C4E8649A1C9667D4591" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the gross gain realized on the disposal of held-to-maturity securities during the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_HeldToMaturitySecuritiesRealizedGain" xlink:label="loc_sigi_HeldToMaturitySecuritiesRealizedGain_B5479F57C20E5C4E8649A1C9667D4591" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_HeldToMaturitySecuritiesRealizedGain_B5479F57C20E5C4E8649A1C9667D4591" xlink:to="lab_sigi_HeldToMaturitySecuritiesRealizedGain_B5479F57C20E5C4E8649A1C9667D4591" xlink:type="arc" />
    <link:label id="lab_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_58BDA0B8B315EB41D416B09BEF82D326_negatedLabel_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_9367FE8E9F7E52DAA58FFCDD56C798A8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">HTM fixed income securities losses</link:label>
    <link:label id="lab_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_58BDA0B8B315EB41D416B09BEF82D326_label_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_9367FE8E9F7E52DAA58FFCDD56C798A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held To Maturity Securities Disposed Security Realized Loss</link:label>
    <link:label id="lab_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_58BDA0B8B315EB41D416B09BEF82D326_documentation_en-US" xlink:label="lab_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_9367FE8E9F7E52DAA58FFCDD56C798A8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the gross loss realized on the disposal of held-to-maturity securities during the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss" xlink:label="loc_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_9367FE8E9F7E52DAA58FFCDD56C798A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_9367FE8E9F7E52DAA58FFCDD56C798A8" xlink:to="lab_sigi_HeldToMaturitySecuritiesDisposedSecurityRealizedLoss_9367FE8E9F7E52DAA58FFCDD56C798A8" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_1E2F503607941FBA498FB09BEF826DA7_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_9158E70851F95D21B1BC55CBE7A4EBD5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AFS securities gains</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_1E2F503607941FBA498FB09BEF826DA7_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_9158E70851F95D21B1BC55CBE7A4EBD5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Realized Gains</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGains" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_9158E70851F95D21B1BC55CBE7A4EBD5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_9158E70851F95D21B1BC55CBE7A4EBD5" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_9158E70851F95D21B1BC55CBE7A4EBD5" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_14C159867B373CDA7296B09BEF820BE9_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_64341AA996565D3B9BC1040163D5B4E1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">AFS securities losses</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_14C159867B373CDA7296B09BEF820BE9_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_64341AA996565D3B9BC1040163D5B4E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Realized Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_64341AA996565D3B9BC1040163D5B4E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_64341AA996565D3B9BC1040163D5B4E1" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_64341AA996565D3B9BC1040163D5B4E1" xlink:type="arc" />
    <link:label id="lab_sigi_ShortTermInvestmentsRealizedGains_2C5DBBDD2A535FC74DEBB09BEF827AC6_terseLabel_en-US" xlink:label="lab_sigi_ShortTermInvestmentsRealizedGains_0CFA38FBCFD75C54A208DF8BB770C945" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short Term Investments Realized Gains</link:label>
    <link:label id="lab_sigi_ShortTermInvestmentsRealizedGains_2C5DBBDD2A535FC74DEBB09BEF827AC6_label_en-US" xlink:label="lab_sigi_ShortTermInvestmentsRealizedGains_0CFA38FBCFD75C54A208DF8BB770C945" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short Term Investments Realized Gains</link:label>
    <link:label id="lab_sigi_ShortTermInvestmentsRealizedGains_2C5DBBDD2A535FC74DEBB09BEF827AC6_documentation_en-US" xlink:label="lab_sigi_ShortTermInvestmentsRealizedGains_0CFA38FBCFD75C54A208DF8BB770C945" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gross realized gains on short term investments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ShortTermInvestmentsRealizedGains" xlink:label="loc_sigi_ShortTermInvestmentsRealizedGains_0CFA38FBCFD75C54A208DF8BB770C945" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ShortTermInvestmentsRealizedGains_0CFA38FBCFD75C54A208DF8BB770C945" xlink:to="lab_sigi_ShortTermInvestmentsRealizedGains_0CFA38FBCFD75C54A208DF8BB770C945" xlink:type="arc" />
    <link:label id="lab_sigi_ShortTermInvestmentsRealizedLosses_E7991064D4A328B91309B09BEF82DFA2_terseLabel_en-US" xlink:label="lab_sigi_ShortTermInvestmentsRealizedLosses_004DC2F326035346B1C44C44BBB61C5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short Term Investments Realized Losses</link:label>
    <link:label id="lab_sigi_ShortTermInvestmentsRealizedLosses_E7991064D4A328B91309B09BEF82DFA2_label_en-US" xlink:label="lab_sigi_ShortTermInvestmentsRealizedLosses_004DC2F326035346B1C44C44BBB61C5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short Term Investments Realized Losses</link:label>
    <link:label id="lab_sigi_ShortTermInvestmentsRealizedLosses_E7991064D4A328B91309B09BEF82DFA2_documentation_en-US" xlink:label="lab_sigi_ShortTermInvestmentsRealizedLosses_004DC2F326035346B1C44C44BBB61C5C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the gross loss realized on the sale of short-term investments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ShortTermInvestmentsRealizedLosses" xlink:label="loc_sigi_ShortTermInvestmentsRealizedLosses_004DC2F326035346B1C44C44BBB61C5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ShortTermInvestmentsRealizedLosses_004DC2F326035346B1C44C44BBB61C5C" xlink:to="lab_sigi_ShortTermInvestmentsRealizedLosses_004DC2F326035346B1C44C44BBB61C5C" xlink:type="arc" />
    <link:label id="lab_sigi_OtherInvestmentsRealizedGains_93A644CC2F3EC6D9ABA1B09BEF8251AD_terseLabel_en-US" xlink:label="lab_sigi_OtherInvestmentsRealizedGains_8333D90461255520B9C821C0E4F34983" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other investment securities gains</link:label>
    <link:label id="lab_sigi_OtherInvestmentsRealizedGains_93A644CC2F3EC6D9ABA1B09BEF8251AD_label_en-US" xlink:label="lab_sigi_OtherInvestmentsRealizedGains_8333D90461255520B9C821C0E4F34983" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Investments Realized Gains</link:label>
    <link:label id="lab_sigi_OtherInvestmentsRealizedGains_93A644CC2F3EC6D9ABA1B09BEF8251AD_documentation_en-US" xlink:label="lab_sigi_OtherInvestmentsRealizedGains_8333D90461255520B9C821C0E4F34983" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the gross profit realized on the sale of other investments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherInvestmentsRealizedGains" xlink:label="loc_sigi_OtherInvestmentsRealizedGains_8333D90461255520B9C821C0E4F34983" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherInvestmentsRealizedGains_8333D90461255520B9C821C0E4F34983" xlink:to="lab_sigi_OtherInvestmentsRealizedGains_8333D90461255520B9C821C0E4F34983" xlink:type="arc" />
    <link:label id="lab_sigi_OtherInvestmentsRealizedLosses_AEA7FACCBC0D42160C5EB09BEF826E05_negatedLabel_en-US" xlink:label="lab_sigi_OtherInvestmentsRealizedLosses_B38801C7BBE65417B600569198FE95F9" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other investment securities losses</link:label>
    <link:label id="lab_sigi_OtherInvestmentsRealizedLosses_AEA7FACCBC0D42160C5EB09BEF826E05_label_en-US" xlink:label="lab_sigi_OtherInvestmentsRealizedLosses_B38801C7BBE65417B600569198FE95F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Investments Realized Losses</link:label>
    <link:label id="lab_sigi_OtherInvestmentsRealizedLosses_AEA7FACCBC0D42160C5EB09BEF826E05_documentation_en-US" xlink:label="lab_sigi_OtherInvestmentsRealizedLosses_B38801C7BBE65417B600569198FE95F9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the gross loss realized on the sale of other investments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherInvestmentsRealizedLosses" xlink:label="loc_sigi_OtherInvestmentsRealizedLosses_B38801C7BBE65417B600569198FE95F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherInvestmentsRealizedLosses_B38801C7BBE65417B600569198FE95F9" xlink:to="lab_sigi_OtherInvestmentsRealizedLosses_B38801C7BBE65417B600569198FE95F9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_3217609797EF64B9B48DB09BEF820F2D_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_B72E91F40C2358A5A4BAD598FB70AA5E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of available-for-sale securities</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_3217609797EF64B9B48DB09BEF820F2D_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_B72E91F40C2358A5A4BAD598FB70AA5E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Available-for-sale Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_B72E91F40C2358A5A4BAD598FB70AA5E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_B72E91F40C2358A5A4BAD598FB70AA5E" xlink:to="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities_B72E91F40C2358A5A4BAD598FB70AA5E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_5352B6A1941D8B2269AC101EE3D36D4C_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_68F29BCDAB1459F8879F426D3B810680" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Indebtedness</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_5352B6A1941D8B2269AC101EE3D36D4C_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_68F29BCDAB1459F8879F426D3B810680" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_68F29BCDAB1459F8879F426D3B810680" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock_68F29BCDAB1459F8879F426D3B810680" xlink:to="lab_us-gaap_DebtDisclosureTextBlock_68F29BCDAB1459F8879F426D3B810680" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_C94B3F6316C39F2E570790CEAF9EBBBD_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F8D9EF5DAFEE593CB52227EB7C93874B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Award Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F8D9EF5DAFEE593CB52227EB7C93874B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F8D9EF5DAFEE593CB52227EB7C93874B" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_F8D9EF5DAFEE593CB52227EB7C93874B" xlink:type="arc" />
    <link:label id="lab_sigi_CashIncentivePlanMember_F473BD7CD3A99C2E819490CEAF9E013B_terseLabel_en-US" xlink:label="lab_sigi_CashIncentivePlanMember_F769B2B38FB5599BA1B6E1AFF906A8A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Incentive Plan [Member]</link:label>
    <link:label id="lab_sigi_CashIncentivePlanMember_F473BD7CD3A99C2E819490CEAF9E013B_label_en-US" xlink:label="lab_sigi_CashIncentivePlanMember_F769B2B38FB5599BA1B6E1AFF906A8A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Incentive Plan [Member]</link:label>
    <link:label id="lab_sigi_CashIncentivePlanMember_F473BD7CD3A99C2E819490CEAF9E013B_documentation_en-US" xlink:label="lab_sigi_CashIncentivePlanMember_F769B2B38FB5599BA1B6E1AFF906A8A1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A liability share-based compensation arrangement.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_CashIncentivePlanMember" xlink:label="loc_sigi_CashIncentivePlanMember_F769B2B38FB5599BA1B6E1AFF906A8A1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_CashIncentivePlanMember_F769B2B38FB5599BA1B6E1AFF906A8A1" xlink:to="lab_sigi_CashIncentivePlanMember_F769B2B38FB5599BA1B6E1AFF906A8A1" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_D17AAB17117DE4F1D29890CEAFA3D335_terseLabel_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis_DD8853472DD65E92AF4745A043C8C622" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_D17AAB17117DE4F1D29890CEAFA3D335_label_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis_DD8853472DD65E92AF4745A043C8C622" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_DD8853472DD65E92AF4745A043C8C622" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementClassOfStockAxis_DD8853472DD65E92AF4745A043C8C622" xlink:to="lab_us-gaap_StatementClassOfStockAxis_DD8853472DD65E92AF4745A043C8C622" xlink:type="arc" />
    <link:label id="lab_us-gaap_ClassOfStockDomain_728A271B029EA6C8D5D890CEAFA3052D_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain_7D9E01101AA156D3A43F065282BD8723" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:label id="lab_us-gaap_ClassOfStockDomain_728A271B029EA6C8D5D890CEAFA3052D_label_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain_7D9E01101AA156D3A43F065282BD8723" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_7D9E01101AA156D3A43F065282BD8723" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockDomain_7D9E01101AA156D3A43F065282BD8723" xlink:to="lab_us-gaap_ClassOfStockDomain_7D9E01101AA156D3A43F065282BD8723" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_0FCC6B5E00302CFB66FD90CEAFA301F6_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_B25376B1D7EF57E9ACE4A19D496D44E9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_0FCC6B5E00302CFB66FD90CEAFA301F6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_B25376B1D7EF57E9ACE4A19D496D44E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_B25376B1D7EF57E9ACE4A19D496D44E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_B25376B1D7EF57E9ACE4A19D496D44E9" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_B25376B1D7EF57E9ACE4A19D496D44E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_257DFAC634ACB47B89A090CEAFA31F96_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_75D77FE9BECB57F5866C4BA878027272" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Outstanding at December 31, 2016, number of shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_257DFAC634ACB47B89A090CEAFA31F96_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_75D77FE9BECB57F5866C4BA878027272" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_75D77FE9BECB57F5866C4BA878027272" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_75D77FE9BECB57F5866C4BA878027272" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_75D77FE9BECB57F5866C4BA878027272" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_B84291325D01999541A090CEAFA36E5B_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_809E1B26D0A258E1916E0AB25FB4AA5F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted in 2017, numbers of shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_B84291325D01999541A090CEAFA36E5B_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_809E1B26D0A258E1916E0AB25FB4AA5F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_809E1B26D0A258E1916E0AB25FB4AA5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_809E1B26D0A258E1916E0AB25FB4AA5F" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_809E1B26D0A258E1916E0AB25FB4AA5F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_BDF3A384E20899BBF99490CEAFA4A00A_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_81B3BCD5CEC1560ABF7F8C786E713766" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercised in 2017, number of shares</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_BDF3A384E20899BBF99490CEAFA4A00A_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_81B3BCD5CEC1560ABF7F8C786E713766" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_81B3BCD5CEC1560ABF7F8C786E713766" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_81B3BCD5CEC1560ABF7F8C786E713766" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_81B3BCD5CEC1560ABF7F8C786E713766" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_2DE1D713D6AE6C1C53EB90CEAFA4E428_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_33568E9DB0BF57CCA86027AF3AC11AA3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forfeited or expired 2017, number of shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_2DE1D713D6AE6C1C53EB90CEAFA4E428_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_33568E9DB0BF57CCA86027AF3AC11AA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_33568E9DB0BF57CCA86027AF3AC11AA3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_33568E9DB0BF57CCA86027AF3AC11AA3" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_33568E9DB0BF57CCA86027AF3AC11AA3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_16CF9891820703DCB0A890CEAFA415EF_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_566D52E3F4875990A762B696DEC65A0F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Outstanding at December 31, 2017, number of shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_566D52E3F4875990A762B696DEC65A0F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_566D52E3F4875990A762B696DEC65A0F" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_566D52E3F4875990A762B696DEC65A0F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_310AE95A987DE490DC0590CEAFA4F2F2_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_91A17EC388385A81B987DF9599535519" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercisable at December 31, 2017, number of shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_310AE95A987DE490DC0590CEAFA4F2F2_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_91A17EC388385A81B987DF9599535519" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_91A17EC388385A81B987DF9599535519" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_91A17EC388385A81B987DF9599535519" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_91A17EC388385A81B987DF9599535519" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_0540A7395EFB31FA8A9090CEAFA46CCA_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_325B08038A2251279C7B25D4637618CA" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Outstanding at December 31, 2016, weighted average exercise price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_0540A7395EFB31FA8A9090CEAFA46CCA_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_325B08038A2251279C7B25D4637618CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_325B08038A2251279C7B25D4637618CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_325B08038A2251279C7B25D4637618CA" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_325B08038A2251279C7B25D4637618CA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_4CE907D47C6792939BB090CEAFA419C6_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_FB9D1F0C6FB9583FAE8DF5C5F72A9E01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted in 2017, weighted average exercise price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_4CE907D47C6792939BB090CEAFA419C6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_FB9D1F0C6FB9583FAE8DF5C5F72A9E01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_FB9D1F0C6FB9583FAE8DF5C5F72A9E01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_FB9D1F0C6FB9583FAE8DF5C5F72A9E01" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_FB9D1F0C6FB9583FAE8DF5C5F72A9E01" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_4D56FB238BE4DDBE45A190CEAFA4E509_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_4F4AF51846D550A89097BF416BC415EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercised in 2017, weighted average exercise price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_4D56FB238BE4DDBE45A190CEAFA4E509_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_4F4AF51846D550A89097BF416BC415EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_4F4AF51846D550A89097BF416BC415EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_4F4AF51846D550A89097BF416BC415EA" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_4F4AF51846D550A89097BF416BC415EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_B61DFABAF2762782277290CEAFA4155C_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_5DDC38E515EB593A9E940BACFC0A05EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forfeited or expired 2017, weighted average exercise price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_B61DFABAF2762782277290CEAFA4155C_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_5DDC38E515EB593A9E940BACFC0A05EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_5DDC38E515EB593A9E940BACFC0A05EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_5DDC38E515EB593A9E940BACFC0A05EA" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_5DDC38E515EB593A9E940BACFC0A05EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_07A4EFED18617FA7736C90CEAFA4E942_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_7A33E8DDCAD5583DAB9DAB819F5C2A7D" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Outstanding at December 31, 2017, weighted average exercise price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_7A33E8DDCAD5583DAB9DAB819F5C2A7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_7A33E8DDCAD5583DAB9DAB819F5C2A7D" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_7A33E8DDCAD5583DAB9DAB819F5C2A7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_160D55A6F131A5CB504390CEAFA4522F_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_1C211F9B36735906982E961877AFC86E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercisable as December 31, 2017, weighted average exercise price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_160D55A6F131A5CB504390CEAFA4522F_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_1C211F9B36735906982E961877AFC86E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_1C211F9B36735906982E961877AFC86E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_1C211F9B36735906982E961877AFC86E" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_1C211F9B36735906982E961877AFC86E" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_B08057FD66109D54711B90CEAFA4D455_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_373BE1D87AFC512CBA47B0465BA3C7D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding at December 31, 2017, weighted average remaining contractual life in years</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_B08057FD66109D54711B90CEAFA4D455_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_373BE1D87AFC512CBA47B0465BA3C7D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_373BE1D87AFC512CBA47B0465BA3C7D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_373BE1D87AFC512CBA47B0465BA3C7D3" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_373BE1D87AFC512CBA47B0465BA3C7D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_E7044F2D55FEAE61E51490CEAFA4C622_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EBDABEFCEB5F589C9BC20630E3CC9A8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercisable at December 31, 2017, weighted average remaining contractual life in years</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_E7044F2D55FEAE61E51490CEAFA4C622_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EBDABEFCEB5F589C9BC20630E3CC9A8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EBDABEFCEB5F589C9BC20630E3CC9A8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EBDABEFCEB5F589C9BC20630E3CC9A8C" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_EBDABEFCEB5F589C9BC20630E3CC9A8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_6BDE9F518775599A73EB90CEAFA449F2_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_F557F18C7B30504CB2C8480117DC03DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding at December 31, 2017, aggregate intrinsic value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_6BDE9F518775599A73EB90CEAFA449F2_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_F557F18C7B30504CB2C8480117DC03DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_F557F18C7B30504CB2C8480117DC03DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_F557F18C7B30504CB2C8480117DC03DB" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_F557F18C7B30504CB2C8480117DC03DB" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_F09DCDE2B56F6F51AE6590CEAFA42A28_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A6B87DE964405F51A19619EC9BED63B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exerciseable at December 31, 2017, aggregate intrinsic value</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_F09DCDE2B56F6F51AE6590CEAFA42A28_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A6B87DE964405F51A19619EC9BED63B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A6B87DE964405F51A19619EC9BED63B6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A6B87DE964405F51A19619EC9BED63B6" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_A6B87DE964405F51A19619EC9BED63B6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_FCE26E46C0529DC5BDE990CEAFA55C2B_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_25ADC629480D5DB5B3932ED9F9476107" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total intrinsic value of options exercised</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_FCE26E46C0529DC5BDE990CEAFA55C2B_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_25ADC629480D5DB5B3932ED9F9476107" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_25ADC629480D5DB5B3932ED9F9476107" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_25ADC629480D5DB5B3932ED9F9476107" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_25ADC629480D5DB5B3932ED9F9476107" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_5379A77A78B7906C7008A04F73E85492_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_917B942503285332B6306492EC1FCCE1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_5379A77A78B7906C7008A04F73E85492_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_917B942503285332B6306492EC1FCCE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_917B942503285332B6306492EC1FCCE1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_917B942503285332B6306492EC1FCCE1" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTable_917B942503285332B6306492EC1FCCE1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_D7D3491A0B47080A7B26A04F73E8D0B1_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis_7D26803D08BE58CBB1D9A016D79FFB1B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_D7D3491A0B47080A7B26A04F73E8D0B1_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis_7D26803D08BE58CBB1D9A016D79FFB1B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_7D26803D08BE58CBB1D9A016D79FFB1B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_7D26803D08BE58CBB1D9A016D79FFB1B" xlink:to="lab_us-gaap_FairValueByMeasurementBasisAxis_7D26803D08BE58CBB1D9A016D79FFB1B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_BB12D9022030AC8EEDD8A04F73E89FF7_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain_4C7EC113FC1C5EADBC37EF906A7DED79" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Disclosure Item Amounts [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_BB12D9022030AC8EEDD8A04F73E89FF7_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain_4C7EC113FC1C5EADBC37EF906A7DED79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_4C7EC113FC1C5EADBC37EF906A7DED79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_4C7EC113FC1C5EADBC37EF906A7DED79" xlink:to="lab_us-gaap_FairValueDisclosureItemAmountsDomain_4C7EC113FC1C5EADBC37EF906A7DED79" xlink:type="arc" />
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_CD5BE6E2D5316DD18DB9A04F73E8BA41_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_A411005AFA7557D5BB4249A36B121FEF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_CD5BE6E2D5316DD18DB9A04F73E8BA41_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_A411005AFA7557D5BB4249A36B121FEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_A411005AFA7557D5BB4249A36B121FEF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_A411005AFA7557D5BB4249A36B121FEF" xlink:to="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_A411005AFA7557D5BB4249A36B121FEF" xlink:type="arc" />
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_FEEB73A0FC11BEC4A602A04F73E86734_terseLabel_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_E2DB0D98B3565805AE0BB004FE2EFFF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying Amount [Member]</link:label>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_FEEB73A0FC11BEC4A602A04F73E86734_label_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_E2DB0D98B3565805AE0BB004FE2EFFF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reported Value Measurement [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_E2DB0D98B3565805AE0BB004FE2EFFF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_E2DB0D98B3565805AE0BB004FE2EFFF8" xlink:to="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_E2DB0D98B3565805AE0BB004FE2EFFF8" xlink:type="arc" />
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_8A85627D35FCF602CCAEA04F73E83ED3_terseLabel_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_7443053AFB025BA28E1283D01C641A5B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value [Member]</link:label>
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_8A85627D35FCF602CCAEA04F73E83ED3_label_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_7443053AFB025BA28E1283D01C641A5B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Estimate of Fair Value Measurement [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_7443053AFB025BA28E1283D01C641A5B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_7443053AFB025BA28E1283D01C641A5B" xlink:to="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_7443053AFB025BA28E1283D01C641A5B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_513A18151B6A5176DAEDA04F73E90004_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_C6B516CCD8DA507C9625A7BF38FC18C2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_513A18151B6A5176DAEDA04F73E90004_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_C6B516CCD8DA507C9625A7BF38FC18C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_C6B516CCD8DA507C9625A7BF38FC18C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_C6B516CCD8DA507C9625A7BF38FC18C2" xlink:to="lab_us-gaap_LongtermDebtTypeAxis_C6B516CCD8DA507C9625A7BF38FC18C2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_89468AC803AB631272FFA04F73E9B725_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain_ABAEAC42DD915FAC8D77D8B3A53B1C1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_89468AC803AB631272FFA04F73E9B725_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain_ABAEAC42DD915FAC8D77D8B3A53B1C1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_ABAEAC42DD915FAC8D77D8B3A53B1C1E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ABAEAC42DD915FAC8D77D8B3A53B1C1E" xlink:to="lab_us-gaap_LongtermDebtTypeDomain_ABAEAC42DD915FAC8D77D8B3A53B1C1E" xlink:type="arc" />
    <link:label id="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_E09D56B274FF095B4D20A04F73E9C504_terseLabel_en-US" xlink:label="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_506100291AB95C48A95C176717780D30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Seven Point Twenty Five Percent Senior Notes [Member]</link:label>
    <link:label id="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_E09D56B274FF095B4D20A04F73E9C504_label_en-US" xlink:label="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_506100291AB95C48A95C176717780D30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Seven Point Twenty Five Percent Senior Notes [Member]</link:label>
    <link:label id="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_E09D56B274FF095B4D20A04F73E9C504_documentation_en-US" xlink:label="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_506100291AB95C48A95C176717780D30" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the 7.25% Senior Notes of the company due 2034.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SevenPointTwentyFivePercentSeniorNotesMember" xlink:label="loc_sigi_SevenPointTwentyFivePercentSeniorNotesMember_506100291AB95C48A95C176717780D30" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SevenPointTwentyFivePercentSeniorNotesMember_506100291AB95C48A95C176717780D30" xlink:to="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_506100291AB95C48A95C176717780D30" xlink:type="arc" />
    <link:label id="lab_sigi_SixPointSeventyPercentSeniorNotesMember_383086918EB219838483A04F73E9CA2C_terseLabel_en-US" xlink:label="lab_sigi_SixPointSeventyPercentSeniorNotesMember_915BD6B735A352E390E985B1DC196F25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Six Point Seventy Percent Senior Notes [Member]</link:label>
    <link:label id="lab_sigi_SixPointSeventyPercentSeniorNotesMember_383086918EB219838483A04F73E9CA2C_label_en-US" xlink:label="lab_sigi_SixPointSeventyPercentSeniorNotesMember_915BD6B735A352E390E985B1DC196F25" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Six Point Seventy Percent Senior Notes [Member]</link:label>
    <link:label id="lab_sigi_SixPointSeventyPercentSeniorNotesMember_383086918EB219838483A04F73E9CA2C_documentation_en-US" xlink:label="lab_sigi_SixPointSeventyPercentSeniorNotesMember_915BD6B735A352E390E985B1DC196F25" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the 6.70% Senior Notes of the company due 2035.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SixPointSeventyPercentSeniorNotesMember" xlink:label="loc_sigi_SixPointSeventyPercentSeniorNotesMember_915BD6B735A352E390E985B1DC196F25" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SixPointSeventyPercentSeniorNotesMember_915BD6B735A352E390E985B1DC196F25" xlink:to="lab_sigi_SixPointSeventyPercentSeniorNotesMember_915BD6B735A352E390E985B1DC196F25" xlink:type="arc" />
    <link:label id="lab_sigi_FivePointEightHundredSeventyFiveMember_515B7C59FCC2281F0014A04F73E9C045_terseLabel_en-US" xlink:label="lab_sigi_FivePointEightHundredSeventyFiveMember_82DB7AEDD3AC5A16BBCC6D01A73296EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Five Point Eight Hundred Seventy Five Percent Senior Notes [Member]</link:label>
    <link:label id="lab_sigi_FivePointEightHundredSeventyFiveMember_515B7C59FCC2281F0014A04F73E9C045_label_en-US" xlink:label="lab_sigi_FivePointEightHundredSeventyFiveMember_82DB7AEDD3AC5A16BBCC6D01A73296EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Five Point Eight Hundred Seventy Five [Member]</link:label>
    <link:label id="lab_sigi_FivePointEightHundredSeventyFiveMember_515B7C59FCC2281F0014A04F73E9C045_documentation_en-US" xlink:label="lab_sigi_FivePointEightHundredSeventyFiveMember_82DB7AEDD3AC5A16BBCC6D01A73296EA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the 5.875% Senior Notes of the company due 2043.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FivePointEightHundredSeventyFiveMember" xlink:label="loc_sigi_FivePointEightHundredSeventyFiveMember_82DB7AEDD3AC5A16BBCC6D01A73296EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FivePointEightHundredSeventyFiveMember_82DB7AEDD3AC5A16BBCC6D01A73296EA" xlink:to="lab_sigi_FivePointEightHundredSeventyFiveMember_82DB7AEDD3AC5A16BBCC6D01A73296EA" xlink:type="arc" />
    <link:label id="lab_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_93D0746A6DCCAB754333A04F73E95F6D_terseLabel_en-US" xlink:label="lab_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_1141467DD22959EB8A0FFF1018879AEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One Point Sixty One Percent Borrowing From Federal Home Loan Bank Due July 21, 2021 [Member]</link:label>
    <link:label id="lab_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_93D0746A6DCCAB754333A04F73E95F6D_label_en-US" xlink:label="lab_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_1141467DD22959EB8A0FFF1018879AEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One Point Sixty One Percent Borrowing From Federal Home Loan Bank Due July 21, 2021 [Member]</link:label>
    <link:label id="lab_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_93D0746A6DCCAB754333A04F73E95F6D_documentation_en-US" xlink:label="lab_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_1141467DD22959EB8A0FFF1018879AEA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One Point Sixty One Percent Borrowing From Federal Home Loan Bank Due July 21, 2021</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member" xlink:label="loc_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_1141467DD22959EB8A0FFF1018879AEA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_1141467DD22959EB8A0FFF1018879AEA" xlink:to="lab_sigi_OnePointSixtyOnePercentBorrowingFromFederalHomeLoanBankDueJuly212021Member_1141467DD22959EB8A0FFF1018879AEA" xlink:type="arc" />
    <link:label id="lab_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_0331F9E41929162721A1A04F73E9A821_terseLabel_en-US" xlink:label="lab_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_FFD1B9B923A853A9895DAD41B93E7A18" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One Point Fifty Six Percent Borrowing From Federal Home Loan Bank Due August 16, 2021 [Member]</link:label>
    <link:label id="lab_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_0331F9E41929162721A1A04F73E9A821_label_en-US" xlink:label="lab_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_FFD1B9B923A853A9895DAD41B93E7A18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One Point Fifty Six Percent Borrowing From Federal Home Loan Bank Due August 16, 2021 [Member]</link:label>
    <link:label id="lab_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_0331F9E41929162721A1A04F73E9A821_documentation_en-US" xlink:label="lab_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_FFD1B9B923A853A9895DAD41B93E7A18" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One Point Fifty Six Percent Borrowing From Federal Home Loan Bank Due August 16, 2021</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member" xlink:label="loc_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_FFD1B9B923A853A9895DAD41B93E7A18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_FFD1B9B923A853A9895DAD41B93E7A18" xlink:to="lab_sigi_OnePointFiftySixPercentBorrowingFromFederalHomeLoanBankDueAugust162021Member_FFD1B9B923A853A9895DAD41B93E7A18" xlink:type="arc" />
    <link:label id="lab_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_E4503539E7465E146E39A04F73E93F2A_terseLabel_en-US" xlink:label="lab_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_443030D6B5685AE0984490A346E579C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Three Point Zero Three Percent Borrowing From Federal Home Loan Bank Due December 16, 2026 [Member]</link:label>
    <link:label id="lab_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_E4503539E7465E146E39A04F73E93F2A_label_en-US" xlink:label="lab_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_443030D6B5685AE0984490A346E579C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Three Point Zero Three Percent Borrowing From Federal Home Loan Bank Due December 16, 2026 [Member]</link:label>
    <link:label id="lab_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_E4503539E7465E146E39A04F73E93F2A_documentation_en-US" xlink:label="lab_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_443030D6B5685AE0984490A346E579C8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three Point Zero Three Percent Borrowing From Federal Home Loan Bank Due December 16, 2026</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member" xlink:label="loc_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_443030D6B5685AE0984490A346E579C8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_443030D6B5685AE0984490A346E579C8" xlink:to="lab_sigi_ThreePointZeroThreePercentBorrowingFromFederalHomeLoanBankDueDecember162026Member_443030D6B5685AE0984490A346E579C8" xlink:type="arc" />
    <link:label id="lab_sigi_LongTermDebtExcludingIssuanceCostsMember_9339D1297E983C3CA5ABA04F73E9E400_terseLabel_en-US" xlink:label="lab_sigi_LongTermDebtExcludingIssuanceCostsMember_503428A2FACE5C46AB97FCF4F9786A4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long Term Debt Excluding Issuance Costs [Member]</link:label>
    <link:label id="lab_sigi_LongTermDebtExcludingIssuanceCostsMember_9339D1297E983C3CA5ABA04F73E9E400_label_en-US" xlink:label="lab_sigi_LongTermDebtExcludingIssuanceCostsMember_503428A2FACE5C46AB97FCF4F9786A4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long Term Debt Excluding Issuance Costs [Member]</link:label>
    <link:label id="lab_sigi_LongTermDebtExcludingIssuanceCostsMember_9339D1297E983C3CA5ABA04F73E9E400_documentation_en-US" xlink:label="lab_sigi_LongTermDebtExcludingIssuanceCostsMember_503428A2FACE5C46AB97FCF4F9786A4A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt arrangement having an initial term longer than one year or beyond the normal operating cycle, if longer excluding related debt issuance costs.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LongTermDebtExcludingIssuanceCostsMember" xlink:label="loc_sigi_LongTermDebtExcludingIssuanceCostsMember_503428A2FACE5C46AB97FCF4F9786A4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LongTermDebtExcludingIssuanceCostsMember_503428A2FACE5C46AB97FCF4F9786A4A" xlink:to="lab_sigi_LongTermDebtExcludingIssuanceCostsMember_503428A2FACE5C46AB97FCF4F9786A4A" xlink:type="arc" />
    <link:label id="lab_sigi_UnamortizedDebtIssuanceCostsMember_B03E9CDDA7B84BEF6317A04F73E98095_terseLabel_en-US" xlink:label="lab_sigi_UnamortizedDebtIssuanceCostsMember_F52DB7E40F1F567EA74F780F30655756" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unamortized Debt Issuance Costs [Member]</link:label>
    <link:label id="lab_sigi_UnamortizedDebtIssuanceCostsMember_B03E9CDDA7B84BEF6317A04F73E98095_label_en-US" xlink:label="lab_sigi_UnamortizedDebtIssuanceCostsMember_F52DB7E40F1F567EA74F780F30655756" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unamortized Debt Issuance Costs [Member]</link:label>
    <link:label id="lab_sigi_UnamortizedDebtIssuanceCostsMember_B03E9CDDA7B84BEF6317A04F73E98095_documentation_en-US" xlink:label="lab_sigi_UnamortizedDebtIssuanceCostsMember_F52DB7E40F1F567EA74F780F30655756" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unamortized debt issue costs associated with outstanding debt.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnamortizedDebtIssuanceCostsMember" xlink:label="loc_sigi_UnamortizedDebtIssuanceCostsMember_F52DB7E40F1F567EA74F780F30655756" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnamortizedDebtIssuanceCostsMember_F52DB7E40F1F567EA74F780F30655756" xlink:to="lab_sigi_UnamortizedDebtIssuanceCostsMember_F52DB7E40F1F567EA74F780F30655756" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_D9F04ADDF733F8901154A04F73E93266_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_EEB0CA82B64757468E986CA39E7BD8AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_EEB0CA82B64757468E986CA39E7BD8AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecurities_EEB0CA82B64757468E986CA39E7BD8AA" xlink:to="lab_us-gaap_HeldToMaturitySecurities_EEB0CA82B64757468E986CA39E7BD8AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebtFairValue_7B7F9D3436FD89EAD721A04F73EA1DD8_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue_FE9C2DE2DDCD5F0E8D4C2DCBCFFBF7F1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Fair Value</link:label>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_7B7F9D3436FD89EAD721A04F73EA1DD8_label_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue_FE9C2DE2DDCD5F0E8D4C2DCBCFFBF7F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="loc_us-gaap_LongTermDebtFairValue_FE9C2DE2DDCD5F0E8D4C2DCBCFFBF7F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtFairValue_FE9C2DE2DDCD5F0E8D4C2DCBCFFBF7F1" xlink:to="lab_us-gaap_LongTermDebtFairValue_FE9C2DE2DDCD5F0E8D4C2DCBCFFBF7F1" xlink:type="arc" />
    <link:label id="lab_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_C7C0EF4A606CCD19793CA04F73EAAB62_terseLabel_en-US" xlink:label="lab_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_45A8002A184E54248B7EED973F25F5AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unamortized Debt Issuance Costs Related to Long-Term Debt</link:label>
    <link:label id="lab_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_C7C0EF4A606CCD19793CA04F73EAAB62_label_en-US" xlink:label="lab_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_45A8002A184E54248B7EED973F25F5AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unamortized Debt Issuance Costs Related to Long-Term Debt</link:label>
    <link:label id="lab_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_C7C0EF4A606CCD19793CA04F73EAAB62_documentation_en-US" xlink:label="lab_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_45A8002A184E54248B7EED973F25F5AD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unamortized Debt Issuance Costs Related to Long-Term Debt</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt" xlink:label="loc_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_45A8002A184E54248B7EED973F25F5AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_45A8002A184E54248B7EED973F25F5AD" xlink:to="lab_sigi_UnamortizedDebtIssuanceCostsRelatedtoLongTermDebt_45A8002A184E54248B7EED973F25F5AD" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountingPoliciesAbstract_3605C6B55F484E47352E8BCDBC2200C1_label_en-US" xlink:label="lab_us-gaap_AccountingPoliciesAbstract_FD267136E8CC59619BF2FEE8308B2ADC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Policies [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_FD267136E8CC59619BF2FEE8308B2ADC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_FD267136E8CC59619BF2FEE8308B2ADC" xlink:to="lab_us-gaap_AccountingPoliciesAbstract_FD267136E8CC59619BF2FEE8308B2ADC" xlink:type="arc" />
    <link:label id="lab_us-gaap_Depreciation_0B3666B5C6C0F633D48D8BCDBC23BF54_terseLabel_en-US" xlink:label="lab_us-gaap_Depreciation_A18ECA2BE1AC57E790F252220FB54B64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation expense</link:label>
    <link:label id="lab_us-gaap_Depreciation_0B3666B5C6C0F633D48D8BCDBC23BF54_label_en-US" xlink:label="lab_us-gaap_Depreciation_A18ECA2BE1AC57E790F252220FB54B64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_A18ECA2BE1AC57E790F252220FB54B64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Depreciation_A18ECA2BE1AC57E790F252220FB54B64" xlink:to="lab_us-gaap_Depreciation_A18ECA2BE1AC57E790F252220FB54B64" xlink:type="arc" />
    <link:label id="lab_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_9FE38AA2746EFD2D92628BCDBC238CED_verboseLabel_en-US" xlink:label="lab_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_A07CD8C4FA7E5443BDED137435A6C50B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investment yields before tax assumed in premium deficiency assessment</link:label>
    <link:label id="lab_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_9FE38AA2746EFD2D92628BCDBC238CED_label_en-US" xlink:label="lab_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_A07CD8C4FA7E5443BDED137435A6C50B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Yields Assumed In Premium Deficiency Assessment</link:label>
    <link:label id="lab_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_9FE38AA2746EFD2D92628BCDBC238CED_documentation_en-US" xlink:label="lab_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_A07CD8C4FA7E5443BDED137435A6C50B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the investment yields assumed in the premium deficiency assessment, which are based on the entity's actual average investment yield before tax as of the calculation date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment" xlink:label="loc_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_A07CD8C4FA7E5443BDED137435A6C50B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_A07CD8C4FA7E5443BDED137435A6C50B" xlink:to="lab_sigi_InvestmentYieldsAssumedInPremiumDeficiencyAssessment_A07CD8C4FA7E5443BDED137435A6C50B" xlink:type="arc" />
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsTable_0909641F86AD353C6ACC917FB3AEDFC4_terseLabel_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsTable_83661D7F33F5585284FDE7813E621650" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investments [Table]</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsTable_0909641F86AD353C6ACC917FB3AEDFC4_label_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsTable_83661D7F33F5585284FDE7813E621650" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investments [Table]</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsTable_0909641F86AD353C6ACC917FB3AEDFC4_documentation_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsTable_83661D7F33F5585284FDE7813E621650" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The disclosure of unrealized gains and losses on investments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnrealizedGainLossOnInvestmentsTable" xlink:label="loc_sigi_UnrealizedGainLossOnInvestmentsTable_83661D7F33F5585284FDE7813E621650" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnrealizedGainLossOnInvestmentsTable_83661D7F33F5585284FDE7813E621650" xlink:to="lab_sigi_UnrealizedGainLossOnInvestmentsTable_83661D7F33F5585284FDE7813E621650" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesMember_34E158EB720F378BCB51917FB3AF5BBA_verboseLabel_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesMember_F47BE382E5BB57DF97EF9F176EC19CD2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total HTM Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldtomaturitySecuritiesMember" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesMember_F47BE382E5BB57DF97EF9F176EC19CD2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldtomaturitySecuritiesMember_F47BE382E5BB57DF97EF9F176EC19CD2" xlink:to="lab_us-gaap_HeldtomaturitySecuritiesMember_F47BE382E5BB57DF97EF9F176EC19CD2" xlink:type="arc" />
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentSecurities_06E584EA4F66E854F91B917FB3AF1A5C_terseLabel_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentSecurities_B68C5E8FCADD58B78D62FAE009A8A983" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentSecurities_06E584EA4F66E854F91B917FB3AF1A5C_label_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentSecurities_B68C5E8FCADD58B78D62FAE009A8A983" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investment Securities</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentSecurities_06E584EA4F66E854F91B917FB3AF1A5C_documentation_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentSecurities_B68C5E8FCADD58B78D62FAE009A8A983" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the net unrealized gains (losses) on investments in other comprehensive income.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnrealizedGainLossOnInvestmentSecurities" xlink:label="loc_sigi_UnrealizedGainLossOnInvestmentSecurities_B68C5E8FCADD58B78D62FAE009A8A983" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnrealizedGainLossOnInvestmentSecurities_B68C5E8FCADD58B78D62FAE009A8A983" xlink:to="lab_sigi_UnrealizedGainLossOnInvestmentSecurities_B68C5E8FCADD58B78D62FAE009A8A983" xlink:type="arc" />
    <link:label id="lab_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_65C5F978D1EDD83483A9917FB3AF7BFC_negatedLabel_en-US" xlink:label="lab_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_4D75704CDCC65FD4B8A7AE7FC865310E" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Deferred income tax expense</link:label>
    <link:label id="lab_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_65C5F978D1EDD83483A9917FB3AF7BFC_label_en-US" xlink:label="lab_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_4D75704CDCC65FD4B8A7AE7FC865310E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Expense Benefit On Investment Securities In Other Comprehensive Income</link:label>
    <link:label id="lab_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_65C5F978D1EDD83483A9917FB3AF7BFC_documentation_en-US" xlink:label="lab_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_4D75704CDCC65FD4B8A7AE7FC865310E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax effect of unrealized gain (loss) on investments in accumulated other comprehensive income.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome" xlink:label="loc_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_4D75704CDCC65FD4B8A7AE7FC865310E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_4D75704CDCC65FD4B8A7AE7FC865310E" xlink:to="lab_sigi_DeferredIncomeTaxExpenseBenefitOnInvestmentSecuritiesInOtherComprehensiveIncome_4D75704CDCC65FD4B8A7AE7FC865310E" xlink:type="arc" />
    <link:label id="lab_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_3E15A7CAA5D424EADCA0917FB3AF16DE_totalLabel_en-US" xlink:label="lab_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_344DE44407B75D129ADA74739F745448" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains, net of deferred income tax</link:label>
    <link:label id="lab_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_3E15A7CAA5D424EADCA0917FB3AF16DE_label_en-US" xlink:label="lab_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_344DE44407B75D129ADA74739F745448" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net unrealized gain losses on investment securities in other comprehensive income net of deferred income tax</link:label>
    <link:label id="lab_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_3E15A7CAA5D424EADCA0917FB3AF16DE_documentation_en-US" xlink:label="lab_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_344DE44407B75D129ADA74739F745448" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the net unrealized gains (losses) on investments in other comprehensive income, net of deferred income tax.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax" xlink:label="loc_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_344DE44407B75D129ADA74739F745448" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_344DE44407B75D129ADA74739F745448" xlink:to="lab_sigi_Netunrealizedgainlossesoninvestmentsecuritiesinothercomprehensiveincomenetofdeferredincometax_344DE44407B75D129ADA74739F745448" xlink:type="arc" />
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_3E0E68E1E09AE0060D7A917FB3AF4CA0_negatedLabel_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_3B4EB366D7CE551CBAD1D794B36C9EEE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Increase (decrease) in net unrealized gains in OCI, net of deferred income tax</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalUnrealizedGainsLossesonInvestmentSecurities" xlink:label="loc_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_3B4EB366D7CE551CBAD1D794B36C9EEE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_3B4EB366D7CE551CBAD1D794B36C9EEE" xlink:to="lab_sigi_TotalUnrealizedGainsLossesonInvestmentSecurities_3B4EB366D7CE551CBAD1D794B36C9EEE" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_01A8D56B6C7A692822C1A049675B84C8_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_8516023C50B35344827BD4049005AB74" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8516023C50B35344827BD4049005AB74" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_8516023C50B35344827BD4049005AB74" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_8516023C50B35344827BD4049005AB74" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_2E861EE7ECB017C07CDAA049675BCB96_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_28FE408AFEFD56BF97E8568FE55C7372" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized holding gains (losses) during the period, Gross</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_2E861EE7ECB017C07CDAA049675BCB96_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_28FE408AFEFD56BF97E8568FE55C7372" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_28FE408AFEFD56BF97E8568FE55C7372" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_28FE408AFEFD56BF97E8568FE55C7372" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_28FE408AFEFD56BF97E8568FE55C7372" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_5AB87B475B7A3737E5ACA049675BF5F0_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_D439E009E99A57CAB033CD81F1742F82" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized holding gains (losses) during the period, Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_5AB87B475B7A3737E5ACA049675BF5F0_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_D439E009E99A57CAB033CD81F1742F82" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_D439E009E99A57CAB033CD81F1742F82" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_D439E009E99A57CAB033CD81F1742F82" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_D439E009E99A57CAB033CD81F1742F82" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_A8E5A8D4C3F1DD646F74A049675B5A2D_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_136308E7D4FC5926B70855D05591604B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Unrealized holding gains (losses) arising during period, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_136308E7D4FC5926B70855D05591604B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_136308E7D4FC5926B70855D05591604B" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_136308E7D4FC5926B70855D05591604B" xlink:type="arc" />
    <link:label id="lab_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_71BBE8B111D36D7B0065A049675BF40B_terseLabel_en-US" xlink:label="lab_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_0A75B95C83F35655804F822CD37ACD8F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-credit portion of other-than-temporary impairment losses recognized in other comprehensive income, Gross</link:label>
    <link:label id="lab_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_71BBE8B111D36D7B0065A049675BF40B_label_en-US" xlink:label="lab_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_0A75B95C83F35655804F822CD37ACD8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non Credit Portion Of Other Than Temporary Impairment Losses Recognized In Other Comprehensive Income Gross</link:label>
    <link:label id="lab_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_71BBE8B111D36D7B0065A049675BF40B_documentation_en-US" xlink:label="lab_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_0A75B95C83F35655804F822CD37ACD8F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Before tax non-credit portion of current other-than-temporary impairment losses on fixed maturity securities recognized in other comprehensive income before tax. This item does not include subsequent changes in appreciation or loss in value.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross" xlink:label="loc_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_0A75B95C83F35655804F822CD37ACD8F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_0A75B95C83F35655804F822CD37ACD8F" xlink:to="lab_sigi_NonCreditPortionOfOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeGross_0A75B95C83F35655804F822CD37ACD8F" xlink:type="arc" />
    <link:label id="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_D9D52F4902045EDE49B3A049675BF66D_terseLabel_en-US" xlink:label="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_FE0A55E17C2E51BD984856C6E9680000" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Credit Portion of Other-Than-Temporary Impairment Losses Recognized In Other Comprehensive Income, Tax</link:label>
    <link:label id="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_D9D52F4902045EDE49B3A049675BF66D_label_en-US" xlink:label="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_FE0A55E17C2E51BD984856C6E9680000" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Credit Portion of Other-Than-Temporary Impairment Losses Recognized In Other Comprehensive Income, Tax</link:label>
    <link:label id="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_D9D52F4902045EDE49B3A049675BF66D_documentation_en-US" xlink:label="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_FE0A55E17C2E51BD984856C6E9680000" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax effect non-credit portion of current other-than-temporary impairment losses on fixed maturity securities recognized in other comprehensive income (loss).  This item does not include subsequent changes in appreciation or loss in value.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax" xlink:label="loc_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_FE0A55E17C2E51BD984856C6E9680000" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_FE0A55E17C2E51BD984856C6E9680000" xlink:to="lab_sigi_NonCreditPortionofOtherThanTemporaryImpairmentLossesRecognizedInOtherComprehensiveIncomeTax_FE0A55E17C2E51BD984856C6E9680000" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_3E7ABDD9D322AE78BB28A049675BA80C_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_78615EBBF5B756D2AFFE5ACD5571F875" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Non-credit portion of other-than-temporary impairments recognized in other comprehensive income, Net</link:label>
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_3E7ABDD9D322AE78BB28A049675BA80C_label_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_78615EBBF5B756D2AFFE5ACD5571F875" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Net of Tax, Portion Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_78615EBBF5B756D2AFFE5ACD5571F875" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_78615EBBF5B756D2AFFE5ACD5571F875" xlink:to="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_78615EBBF5B756D2AFFE5ACD5571F875" xlink:type="arc" />
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_694105D6EFE6E781EFEBA049675BD045_negatedTerseLabel_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_76F11DF610CA572A8CDC8C766002290F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Amount reclassified into net income: HTM securities, Gross</link:label>
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_694105D6EFE6E781EFEBA049675BD045_label_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_76F11DF610CA572A8CDC8C766002290F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Before Tax</link:label>
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_694105D6EFE6E781EFEBA049675BD045_documentation_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_76F11DF610CA572A8CDC8C766002290F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Before tax amount of the reclassification adjustment related to held-to-maturity securities transferred from the available-for-sale category.  This amount includes amortization and amounts realized from the disposal of these securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax" xlink:label="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_76F11DF610CA572A8CDC8C766002290F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_76F11DF610CA572A8CDC8C766002290F" xlink:to="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleBeforeTax_76F11DF610CA572A8CDC8C766002290F" xlink:type="arc" />
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_5413C3437313DC6610CBA049675B448C_negatedTerseLabel_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_AC2E4E485FDC5B8690C102463771D5DD" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Amounts reclassified into net income: HTM securities, Tax</link:label>
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_5413C3437313DC6610CBA049675B448C_label_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_AC2E4E485FDC5B8690C102463771D5DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization Of Net Unrealized Gains Losses On Held To Maturity Transferred From Available For Sale Tax</link:label>
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_5413C3437313DC6610CBA049675B448C_documentation_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_AC2E4E485FDC5B8690C102463771D5DD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax effect of the reclassification adjustment related to held-to-maturity securities transferred from the available-for-sale category. This amount includes amortization and amounts realized from the disposal of these securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax" xlink:label="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_AC2E4E485FDC5B8690C102463771D5DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_AC2E4E485FDC5B8690C102463771D5DD" xlink:to="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleTax_AC2E4E485FDC5B8690C102463771D5DD" xlink:type="arc" />
    <link:label id="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_4C1B9C54448F54826119A049675B00E3_negatedTotalLabel_en-US" xlink:label="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_2F3F46EBE25B5AA783ABAE161082E05E" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Amount reclassified into net income: HTM securities, Net</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax" xlink:label="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_2F3F46EBE25B5AA783ABAE161082E05E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_2F3F46EBE25B5AA783ABAE161082E05E" xlink:to="lab_sigi_AmortizationOfNetUnrealizedGainsLossesOnHeldToMaturityTransferredFromAvailableForSaleNetofTax_2F3F46EBE25B5AA783ABAE161082E05E" xlink:type="arc" />
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_EC09E4D67E1AF4F875C5A049675B4A84_negatedTerseLabel_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_04477FE23AE150DBBB5148303DF1E076" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Non-credit OTTI, Gross</link:label>
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_EC09E4D67E1AF4F875C5A049675B4A84_label_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_04477FE23AE150DBBB5148303DF1E076" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income Loss Reclassification Adjustment From AOCI For Non Credit Other Than Temporary Impaired Securities Before Tax</link:label>
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_EC09E4D67E1AF4F875C5A049675B4A84_documentation_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_04477FE23AE150DBBB5148303DF1E076" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount before tax of reclassification adjustment from accumulated other comprehensive income related to non-credit OTTI securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax" xlink:label="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_04477FE23AE150DBBB5148303DF1E076" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_04477FE23AE150DBBB5148303DF1E076" xlink:to="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesBeforeTax_04477FE23AE150DBBB5148303DF1E076" xlink:type="arc" />
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_FCA285C7817C656C363AA049675B1650_negatedTerseLabel_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_C28A93EFD86B5E4DA332D2584D55DBF5" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Non-credit OTTI, Tax</link:label>
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_FCA285C7817C656C363AA049675B1650_label_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_C28A93EFD86B5E4DA332D2584D55DBF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income Loss Reclassification Adjustment From AOCI For Non Credit Other Than Temporary Impaired Securities Tax</link:label>
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_FCA285C7817C656C363AA049675B1650_documentation_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_C28A93EFD86B5E4DA332D2584D55DBF5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive income related to non-credit OTTI securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax" xlink:label="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_C28A93EFD86B5E4DA332D2584D55DBF5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_C28A93EFD86B5E4DA332D2584D55DBF5" xlink:to="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesTax_C28A93EFD86B5E4DA332D2584D55DBF5" xlink:type="arc" />
    <link:label id="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_11EB12FF44CBEE3DF24DA049675BB025_negatedTotalLabel_en-US" xlink:label="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_0482AB7BDB315ACAB0BB481E454FEF10" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Amounts reclassified into net income: Non-credit other-than-temporary impairment</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax" xlink:label="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_0482AB7BDB315ACAB0BB481E454FEF10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_0482AB7BDB315ACAB0BB481E454FEF10" xlink:to="lab_sigi_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForNonCreditOtherThanTemporaryImpairedSecuritiesNetOfTax_0482AB7BDB315ACAB0BB481E454FEF10" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_84610F80EB9CF2617FA9A049675B8AE4_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_AAEDBDF67A4A56A1811CC4F145806EBF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Realized (gains) losses on AFS securities, Gross</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_84610F80EB9CF2617FA9A049675B8AE4_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_AAEDBDF67A4A56A1811CC4F145806EBF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_AAEDBDF67A4A56A1811CC4F145806EBF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_AAEDBDF67A4A56A1811CC4F145806EBF" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_AAEDBDF67A4A56A1811CC4F145806EBF" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_9A2DE212B2DD2C5A22AAA049675CFB61_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_15C03C442D23518F946851643F9BD69F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Realized (gains) losses on AFS securities, Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_9A2DE212B2DD2C5A22AAA049675CFB61_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_15C03C442D23518F946851643F9BD69F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_15C03C442D23518F946851643F9BD69F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_15C03C442D23518F946851643F9BD69F" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_15C03C442D23518F946851643F9BD69F" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_75ADB386AFDB8A1593FBA049675C4926_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_3BFAC96B58E9517C967A1A700E845BDE" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Realized (gains) losses on available for sale securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_3BFAC96B58E9517C967A1A700E845BDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_3BFAC96B58E9517C967A1A700E845BDE" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_3BFAC96B58E9517C967A1A700E845BDE" xlink:type="arc" />
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_1C44AF4965320B002BD0A049675C0873_totalLabel_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_985B8424AB2E5ED286F6DB9B737667CC" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses), Gross</link:label>
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_1C44AF4965320B002BD0A049675C0873_label_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_985B8424AB2E5ED286F6DB9B737667CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Unrealized Gains Losses On Investment Securities Gross</link:label>
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_1C44AF4965320B002BD0A049675C0873_documentation_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_985B8424AB2E5ED286F6DB9B737667CC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pre-tax change in unrealized gains/losses on investment securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross" xlink:label="loc_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_985B8424AB2E5ED286F6DB9B737667CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_985B8424AB2E5ED286F6DB9B737667CC" xlink:to="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesGross_985B8424AB2E5ED286F6DB9B737667CC" xlink:type="arc" />
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_3B3938AE8DC94BBFE923A049675CA3E2_totalLabel_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_CB24A3C25BFE5199BFFAB5239438CC5E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unrealized gains (losses), Tax</link:label>
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_3B3938AE8DC94BBFE923A049675CA3E2_label_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_CB24A3C25BFE5199BFFAB5239438CC5E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Unrealized Gains Losses On Investment Securities Tax</link:label>
    <link:label id="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_3B3938AE8DC94BBFE923A049675CA3E2_documentation_en-US" xlink:label="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_CB24A3C25BFE5199BFFAB5239438CC5E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax effect of change in unrealized gain/loss on investment securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax" xlink:label="loc_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_CB24A3C25BFE5199BFFAB5239438CC5E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_CB24A3C25BFE5199BFFAB5239438CC5E" xlink:to="lab_sigi_TotalUnrealizedGainsLossesOnInvestmentSecuritiesTax_CB24A3C25BFE5199BFFAB5239438CC5E" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_448B267CACDA466A6444A049675C1AEF_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_5FBFDC347BFA5A039FFAA58F900BF05D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net actuarial (loss) gain, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_5FBFDC347BFA5A039FFAA58F900BF05D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_5FBFDC347BFA5A039FFAA58F900BF05D" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_5FBFDC347BFA5A039FFAA58F900BF05D" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_850A5531ADEF173C22B0A049675C22BB_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_AECB4098D06F52909F21D0E389281692" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net actuarial (loss) gain, Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_850A5531ADEF173C22B0A049675C22BB_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_AECB4098D06F52909F21D0E389281692" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_AECB4098D06F52909F21D0E389281692" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_AECB4098D06F52909F21D0E389281692" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_AECB4098D06F52909F21D0E389281692" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_0350CE18CCCA2044A821A049675CEDE5_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_86F02BA6A68656E7B11B75E85F7EC2F5" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net actuarial (loss) gain, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_86F02BA6A68656E7B11B75E85F7EC2F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_86F02BA6A68656E7B11B75E85F7EC2F5" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_86F02BA6A68656E7B11B75E85F7EC2F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_371B60C0FB099155FCB0A049675C40D0_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7C26DDD9C2EE51BCB71344BA561D5257" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Amount reclassified into net i ncome: Net actuarial loss, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7C26DDD9C2EE51BCB71344BA561D5257" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7C26DDD9C2EE51BCB71344BA561D5257" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax_7C26DDD9C2EE51BCB71344BA561D5257" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax_B53A0415A095B289AFD1A049675C6B28_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax_C0E90FAB0BEC59C6B9F7780CFF0C8826" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Amount reclassified into Net Income: Net actuarial loss, Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax_B53A0415A095B289AFD1A049675C6B28_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax_C0E90FAB0BEC59C6B9F7780CFF0C8826" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax_C0E90FAB0BEC59C6B9F7780CFF0C8826" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax_C0E90FAB0BEC59C6B9F7780CFF0C8826" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax_C0E90FAB0BEC59C6B9F7780CFF0C8826" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_6096324AD327F4CA7475A049675C4B47_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_03689F85FE7F5741B609ED25216BBE2C" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Amount reclassified into net income: Net actuarial loss, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_03689F85FE7F5741B609ED25216BBE2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_03689F85FE7F5741B609ED25216BBE2C" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax_03689F85FE7F5741B609ED25216BBE2C" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_937FEFE1888838DC8EA9A049675C67E2_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_2BE2A03BAD4955E7AA155F1D682BC1B6" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Defined pension and other post-retirement benefit plans, Gross</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_937FEFE1888838DC8EA9A049675C67E2_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_2BE2A03BAD4955E7AA155F1D682BC1B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_2BE2A03BAD4955E7AA155F1D682BC1B6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_2BE2A03BAD4955E7AA155F1D682BC1B6" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_2BE2A03BAD4955E7AA155F1D682BC1B6" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_D1B8917CD7063A01082DA049675C5868_negatedTotalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_A542CB6CE21D5915BA59CF547565E4DC" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Defined pension and other post-retirement benefit plans, Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_D1B8917CD7063A01082DA049675C5868_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_A542CB6CE21D5915BA59CF547565E4DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_A542CB6CE21D5915BA59CF547565E4DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_A542CB6CE21D5915BA59CF547565E4DC" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_A542CB6CE21D5915BA59CF547565E4DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_32F2CB17C4F98C023E5EA049675CCA51_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6B809AFD67D3563B811B0CD1183F4988" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Gross</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_32F2CB17C4F98C023E5EA049675CCA51_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6B809AFD67D3563B811B0CD1183F4988" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6B809AFD67D3563B811B0CD1183F4988" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6B809AFD67D3563B811B0CD1183F4988" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6B809AFD67D3563B811B0CD1183F4988" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossTax_75C536E752502C11C09AA049675DA04C_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossTax_3C3E4A15E34F5A2EB74C20C6588AA4BB" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossTax_75C536E752502C11C09AA049675DA04C_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossTax_3C3E4A15E34F5A2EB74C20C6588AA4BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_3C3E4A15E34F5A2EB74C20C6588AA4BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTax_3C3E4A15E34F5A2EB74C20C6588AA4BB" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossTax_3C3E4A15E34F5A2EB74C20C6588AA4BB" xlink:type="arc" />
    <link:label id="lab_sigi_ComprehensiveIncomeLossBeforeTax_1F12954F78A4DFA85EC8A049675DB6B7_terseLabel_en-US" xlink:label="lab_sigi_ComprehensiveIncomeLossBeforeTax_21D0714BDC5E5C6195F283DD8049DCBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Comprehensive Income, Before Tax</link:label>
    <link:label id="lab_sigi_ComprehensiveIncomeLossBeforeTax_1F12954F78A4DFA85EC8A049675DB6B7_label_en-US" xlink:label="lab_sigi_ComprehensiveIncomeLossBeforeTax_21D0714BDC5E5C6195F283DD8049DCBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income Loss Before Tax</link:label>
    <link:label id="lab_sigi_ComprehensiveIncomeLossBeforeTax_1F12954F78A4DFA85EC8A049675DB6B7_documentation_en-US" xlink:label="lab_sigi_ComprehensiveIncomeLossBeforeTax_21D0714BDC5E5C6195F283DD8049DCBE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The pre-tax change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ComprehensiveIncomeLossBeforeTax" xlink:label="loc_sigi_ComprehensiveIncomeLossBeforeTax_21D0714BDC5E5C6195F283DD8049DCBE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ComprehensiveIncomeLossBeforeTax_21D0714BDC5E5C6195F283DD8049DCBE" xlink:to="lab_sigi_ComprehensiveIncomeLossBeforeTax_21D0714BDC5E5C6195F283DD8049DCBE" xlink:type="arc" />
    <link:label id="lab_sigi_ComprehensiveIncomeLossTax_EE57E6DCCC3E66479985A049675D1237_terseLabel_en-US" xlink:label="lab_sigi_ComprehensiveIncomeLossTax_1B7127E0DB69512093181D223C52F3A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Comprehensive Income, Tax</link:label>
    <link:label id="lab_sigi_ComprehensiveIncomeLossTax_EE57E6DCCC3E66479985A049675D1237_label_en-US" xlink:label="lab_sigi_ComprehensiveIncomeLossTax_1B7127E0DB69512093181D223C52F3A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income Loss Tax</link:label>
    <link:label id="lab_sigi_ComprehensiveIncomeLossTax_EE57E6DCCC3E66479985A049675D1237_documentation_en-US" xlink:label="lab_sigi_ComprehensiveIncomeLossTax_1B7127E0DB69512093181D223C52F3A3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The tax effect of the change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ComprehensiveIncomeLossTax" xlink:label="loc_sigi_ComprehensiveIncomeLossTax_1B7127E0DB69512093181D223C52F3A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ComprehensiveIncomeLossTax_1B7127E0DB69512093181D223C52F3A3" xlink:to="lab_sigi_ComprehensiveIncomeLossTax_1B7127E0DB69512093181D223C52F3A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock_FFC2871BADDB461ED8FA101EE552E98A_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock_EB9495464FF25C7C83DFEDA257CF9C75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Total Reinsurance Balances Segregated By Reinsurer</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock_FFC2871BADDB461ED8FA101EE552E98A_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock_EB9495464FF25C7C83DFEDA257CF9C75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ceded Credit Risk [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock" xlink:label="loc_us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock_EB9495464FF25C7C83DFEDA257CF9C75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock_EB9495464FF25C7C83DFEDA257CF9C75" xlink:to="lab_us-gaap_ScheduleOfCededCreditRiskByReinsurerTextBlock_EB9495464FF25C7C83DFEDA257CF9C75" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectsOfReinsuranceTableTextBlock_751C73BBE8C25EDABDAC101EE552B772_terseLabel_en-US" xlink:label="lab_us-gaap_EffectsOfReinsuranceTableTextBlock_7E95FF86B7AD591C89FE513B9932A460" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">List Of Direct, Assumed, And Ceded Reinsurance Amounts</link:label>
    <link:label id="lab_us-gaap_EffectsOfReinsuranceTableTextBlock_751C73BBE8C25EDABDAC101EE552B772_label_en-US" xlink:label="lab_us-gaap_EffectsOfReinsuranceTableTextBlock_7E95FF86B7AD591C89FE513B9932A460" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effects of Reinsurance [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectsOfReinsuranceTableTextBlock" xlink:label="loc_us-gaap_EffectsOfReinsuranceTableTextBlock_7E95FF86B7AD591C89FE513B9932A460" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectsOfReinsuranceTableTextBlock_7E95FF86B7AD591C89FE513B9932A460" xlink:to="lab_us-gaap_EffectsOfReinsuranceTableTextBlock_7E95FF86B7AD591C89FE513B9932A460" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_863F1A1D70DC1927864C101EE552D015_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_AB152C69A0115BB383528175EF767E7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Ceded Premiums and Losses Related to Flood Operations</link:label>
    <link:label id="lab_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_863F1A1D70DC1927864C101EE552D015_label_en-US" xlink:label="lab_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_AB152C69A0115BB383528175EF767E7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Flood Ceded Premiums And Losses [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_863F1A1D70DC1927864C101EE552D015_documentation_en-US" xlink:label="lab_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_AB152C69A0115BB383528175EF767E7D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This table discloses the premiums and losses and loss expenses that are ceded to the National Flood Insurance Program.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock" xlink:label="loc_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_AB152C69A0115BB383528175EF767E7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_AB152C69A0115BB383528175EF767E7D" xlink:to="lab_sigi_ScheduleOfFloodCededPremiumsAndLossesTableTextBlock_AB152C69A0115BB383528175EF767E7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_51A5B0A927D25306F73E9FB491484158_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract_3209D31998505671827ED599A41DB483" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_3209D31998505671827ED599A41DB483" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_3209D31998505671827ED599A41DB483" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract_3209D31998505671827ED599A41DB483" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_ED48DAC4E690B8D789389FB4914A316D_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_2C8C7109EFA75EDBB4E4A2B439964584" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_2C8C7109EFA75EDBB4E4A2B439964584" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationAmortizationAndAccretionNet_2C8C7109EFA75EDBB4E4A2B439964584" xlink:to="lab_us-gaap_DepreciationAmortizationAndAccretionNet_2C8C7109EFA75EDBB4E4A2B439964584" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_A79881E886F082447E8F9FB4914AB99D_negatedLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_BA8C0C85D63B548C9871737254AEF887" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Undistributed (gains) losses of equity method investments</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_A79881E886F082447E8F9FB4914AB99D_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_BA8C0C85D63B548C9871737254AEF887" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Equity Method Investments, Net of Dividends or Distributions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_BA8C0C85D63B548C9871737254AEF887" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_BA8C0C85D63B548C9871737254AEF887" xlink:to="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_BA8C0C85D63B548C9871737254AEF887" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLosses_E2C34CD4AD020EAAB1E99FB4914FF721_negatedLabel_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLosses_9A619EE95E8B571596D530B7D597791C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net realized (gains) losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_9A619EE95E8B571596D530B7D597791C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedInvestmentGainsLosses_9A619EE95E8B571596D530B7D597791C" xlink:to="lab_us-gaap_RealizedInvestmentGainsLosses_9A619EE95E8B571596D530B7D597791C" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_FC3F09CAA4F331BAB9029FB4914F979F_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_1492755A4E5E5189A04DA4DF783DB547" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loss on disposal of fixed assets</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_FC3F09CAA4F331BAB9029FB4914F979F_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_1492755A4E5E5189A04DA4DF783DB547" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Disposition of Property Plant Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_1492755A4E5E5189A04DA4DF783DB547" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_1492755A4E5E5189A04DA4DF783DB547" xlink:to="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_1492755A4E5E5189A04DA4DF783DB547" xlink:type="arc" />
    <link:label id="lab_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_62BD2E759A4289C48AF99FB4914F6DA4_terseLabel_en-US" xlink:label="lab_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_FEEEF53AEEBF524A8BB03BFEF7D3EA95" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase in reserves for loss and loss expense, net of reinsurance recoverables</link:label>
    <link:label id="lab_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_62BD2E759A4289C48AF99FB4914F6DA4_label_en-US" xlink:label="lab_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_FEEEF53AEEBF524A8BB03BFEF7D3EA95" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase decrease in reserves for losses and loss expenses, net of reinsurance recoverables</link:label>
    <link:label id="lab_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_62BD2E759A4289C48AF99FB4914F6DA4_documentation_en-US" xlink:label="lab_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_FEEEF53AEEBF524A8BB03BFEF7D3EA95" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The net change during the reporting period in the reserve account established to account for expected losses net of reinsurance recoverables.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables" xlink:label="loc_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_FEEEF53AEEBF524A8BB03BFEF7D3EA95" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_FEEEF53AEEBF524A8BB03BFEF7D3EA95" xlink:to="lab_sigi_IncreaseDecreaseInReservesForLossesAndLossExpensesNetOfReinsuranceRecoverables_FEEEF53AEEBF524A8BB03BFEF7D3EA95" xlink:type="arc" />
    <link:label id="lab_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_98055CAB6E37E16C714B9FB49150321A_terseLabel_en-US" xlink:label="lab_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_0CBC65146D1651989CC437F1091B6DA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase in unearned premiums, net of prepaid reinsurance</link:label>
    <link:label id="lab_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_98055CAB6E37E16C714B9FB49150321A_label_en-US" xlink:label="lab_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_0CBC65146D1651989CC437F1091B6DA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase Decrease In Unearned Premiums Net Of Prepaid Reinsurance</link:label>
    <link:label id="lab_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_98055CAB6E37E16C714B9FB49150321A_documentation_en-US" xlink:label="lab_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_0CBC65146D1651989CC437F1091B6DA7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change during the period in the unearned portion of premiums written, net of prepaid reinsurance. Premiums written are initially booked as unearned premiums and are recognized as revenue over the known or estimated life of the policy</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance" xlink:label="loc_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_0CBC65146D1651989CC437F1091B6DA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_0CBC65146D1651989CC437F1091B6DA7" xlink:to="lab_sigi_IncreaseDecreaseInUnearnedPremiumsNetOfPrepaidReinsurance_0CBC65146D1651989CC437F1091B6DA7" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_F21670AAC20B34AD269C9FB49150EF4D_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_6F54E0A639AE547E913B7B48A98700FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Decrease in net federal income taxes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxes_6F54E0A639AE547E913B7B48A98700FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInIncomeTaxes_6F54E0A639AE547E913B7B48A98700FC" xlink:to="lab_us-gaap_IncreaseDecreaseInIncomeTaxes_6F54E0A639AE547E913B7B48A98700FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInPremiumsReceivable_2FB313B077164C9555429FB4915058CD_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPremiumsReceivable_AADDA0FC048556EC9738027C8608ED7E" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Increase in premiums receivable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInPremiumsReceivable_2FB313B077164C9555429FB4915058CD_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPremiumsReceivable_AADDA0FC048556EC9738027C8608ED7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Premiums Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInPremiumsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInPremiumsReceivable_AADDA0FC048556EC9738027C8608ED7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInPremiumsReceivable_AADDA0FC048556EC9738027C8608ED7E" xlink:to="lab_us-gaap_IncreaseDecreaseInPremiumsReceivable_AADDA0FC048556EC9738027C8608ED7E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease_F391561207B490C8CF6F9FB49150585F_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease_7DFDDA4915015F5E92B6C955FEF82646" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase in deferred policy acquisition costs</link:label>
    <link:label id="lab_us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease_F391561207B490C8CF6F9FB49150585F_label_en-US" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease_7DFDDA4915015F5E92B6C955FEF82646" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Policy Acquisition Costs, Period Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease_7DFDDA4915015F5E92B6C955FEF82646" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease_7DFDDA4915015F5E92B6C955FEF82646" xlink:to="lab_us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease_7DFDDA4915015F5E92B6C955FEF82646" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_61B2125E3169FB4F3F569FB491502DC2_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_28647B65820C558CB83201AA6638CA7F" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">(Increase) decrease in interest and dividends due or accrued</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_61B2125E3169FB4F3F569FB491502DC2_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_28647B65820C558CB83201AA6638CA7F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Interest and Dividends Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_28647B65820C558CB83201AA6638CA7F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_28647B65820C558CB83201AA6638CA7F" xlink:to="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_28647B65820C558CB83201AA6638CA7F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_EEC3243A7259D93EEE3A9FB49150950D_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_D1ED130B329B54C89C467DC58C52A162" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">(Decrease) increase in accrued salaries and benefits</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_EEC3243A7259D93EEE3A9FB49150950D_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_D1ED130B329B54C89C467DC58C52A162" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Employee Related Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_D1ED130B329B54C89C467DC58C52A162" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_D1ED130B329B54C89C467DC58C52A162" xlink:to="lab_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_D1ED130B329B54C89C467DC58C52A162" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_BB80BC046F01B3A5E56C9FB49150D101_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_7A084B4F2AAF5ECDB96382FD48FEDBB1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Increase in other assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_7A084B4F2AAF5ECDB96382FD48FEDBB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_7A084B4F2AAF5ECDB96382FD48FEDBB1" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_7A084B4F2AAF5ECDB96382FD48FEDBB1" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7EAC42495AC5918600579FB491505821_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7EC8E293AF65559898CE6A1416D08347" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase in other liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7EC8E293AF65559898CE6A1416D08347" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7EC8E293AF65559898CE6A1416D08347" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7EC8E293AF65559898CE6A1416D08347" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_ECE1579F9B52D00F49919FB49151C4A9_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_8B4A84462C5E530A92FA6BD9816AFF27" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of fixed income securities, held-to-maturity</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_ECE1579F9B52D00F49919FB49151C4A9_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_8B4A84462C5E530A92FA6BD9816AFF27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Held-to-maturity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities" xlink:label="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_8B4A84462C5E530A92FA6BD9816AFF27" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_8B4A84462C5E530A92FA6BD9816AFF27" xlink:to="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_8B4A84462C5E530A92FA6BD9816AFF27" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_32BC10720F76554478EA9FB49151B893_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_3320101F004A56D8B0B8DE8156AE47EA" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of equity securities, available-for-sale</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_32BC10720F76554478EA9FB49151B893_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_3320101F004A56D8B0B8DE8156AE47EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Available-for-sale Securities, Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_3320101F004A56D8B0B8DE8156AE47EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_3320101F004A56D8B0B8DE8156AE47EA" xlink:to="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity_3320101F004A56D8B0B8DE8156AE47EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireOtherInvestments_FEBD4CC64BA77AA549209FB491517562_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherInvestments_D175F5E53C58542997C0D5C51DE5E250" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of other investments</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireOtherInvestments_FEBD4CC64BA77AA549209FB491517562_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireOtherInvestments_D175F5E53C58542997C0D5C51DE5E250" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Other Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireOtherInvestments_D175F5E53C58542997C0D5C51DE5E250" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireOtherInvestments_D175F5E53C58542997C0D5C51DE5E250" xlink:to="lab_us-gaap_PaymentsToAcquireOtherInvestments_D175F5E53C58542997C0D5C51DE5E250" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_8CA45F9307916A8A49609FB491529F5D_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_73148F7662BC5ED19F448C2A16991201" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale of fixed income securities, available-for-sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_8CA45F9307916A8A49609FB491529F5D_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_73148F7662BC5ED19F448C2A16991201" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Available-for-sale Securities, Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_73148F7662BC5ED19F448C2A16991201" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_73148F7662BC5ED19F448C2A16991201" xlink:to="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_73148F7662BC5ED19F448C2A16991201" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_18F9EF0EB31E2E8BBAD39FB49152AD16_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_6E92DE516EEC5E68B23E7DFAA3576E69" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption and maturities of fixed income securities, held-to-maturity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_6E92DE516EEC5E68B23E7DFAA3576E69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_6E92DE516EEC5E68B23E7DFAA3576E69" xlink:to="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_6E92DE516EEC5E68B23E7DFAA3576E69" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_A52C711589AEC2760CE59FB491525435_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_CC25E059301B5141A1C218A8C60225B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale of equity securities, available-for-sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_A52C711589AEC2760CE59FB491525435_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_CC25E059301B5141A1C218A8C60225B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Available-for-sale Securities, Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_CC25E059301B5141A1C218A8C60225B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_CC25E059301B5141A1C218A8C60225B3" xlink:to="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_CC25E059301B5141A1C218A8C60225B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_BE5B08FAE6D90D446E299FB491577584_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_8293E486C7F35C77A6FA6DD53B258CDD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distributions from other investments</link:label>
    <link:label id="lab_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_BE5B08FAE6D90D446E299FB491577584_label_en-US" xlink:label="lab_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_8293E486C7F35C77A6FA6DD53B258CDD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Equity Method Investment, Distribution, Return of Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital" xlink:label="loc_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_8293E486C7F35C77A6FA6DD53B258CDD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_8293E486C7F35C77A6FA6DD53B258CDD" xlink:to="lab_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_8293E486C7F35C77A6FA6DD53B258CDD" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromProductiveAssets_E4D4DF83263BD26761789FB49157BADF_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromProductiveAssets_9669B3E79F785D7EBF74660175954214" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of property and equipment</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromProductiveAssets_E4D4DF83263BD26761789FB49157BADF_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromProductiveAssets_9669B3E79F785D7EBF74660175954214" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Productive Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromProductiveAssets" xlink:label="loc_us-gaap_PaymentsForProceedsFromProductiveAssets_9669B3E79F785D7EBF74660175954214" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromProductiveAssets_9669B3E79F785D7EBF74660175954214" xlink:to="lab_us-gaap_PaymentsForProceedsFromProductiveAssets_9669B3E79F785D7EBF74660175954214" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_94204147D97D7D8C284B9FB491576DBD_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_6749A6E1EE9F5B9587005023122276DF" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in investing activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_6749A6E1EE9F5B9587005023122276DF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_6749A6E1EE9F5B9587005023122276DF" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_6749A6E1EE9F5B9587005023122276DF" xlink:type="arc" />
    <link:label id="lab_sigi_BorrowingsFromSubsidiaries_609A5026C33262948F6D9FB49158ED88_terseLabel_en-US" xlink:label="lab_sigi_BorrowingsFromSubsidiaries_DF1BEBAD2CED5E218083ED9FB9C54401" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from borrowings</link:label>
    <link:label id="lab_sigi_BorrowingsFromSubsidiaries_609A5026C33262948F6D9FB49158ED88_label_en-US" xlink:label="lab_sigi_BorrowingsFromSubsidiaries_DF1BEBAD2CED5E218083ED9FB9C54401" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowings From Subsidiaries</link:label>
    <link:label id="lab_sigi_BorrowingsFromSubsidiaries_609A5026C33262948F6D9FB49158ED88_documentation_en-US" xlink:label="lab_sigi_BorrowingsFromSubsidiaries_DF1BEBAD2CED5E218083ED9FB9C54401" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The cash inflow from a borrowing made from the parent's subsidiaries.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_BorrowingsFromSubsidiaries" xlink:label="loc_sigi_BorrowingsFromSubsidiaries_DF1BEBAD2CED5E218083ED9FB9C54401" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_BorrowingsFromSubsidiaries_DF1BEBAD2CED5E218083ED9FB9C54401" xlink:to="lab_sigi_BorrowingsFromSubsidiaries_DF1BEBAD2CED5E218083ED9FB9C54401" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_463C4551A604D6F10DFE9FB4915827DC_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_73C881BDBD0A5BB8953B8DB721D4BB97" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repayment of borrowings</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_463C4551A604D6F10DFE9FB4915827DC_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_73C881BDBD0A5BB8953B8DB721D4BB97" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Federal Home Loan Bank Borrowings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings" xlink:label="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_73C881BDBD0A5BB8953B8DB721D4BB97" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_73C881BDBD0A5BB8953B8DB721D4BB97" xlink:to="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_73C881BDBD0A5BB8953B8DB721D4BB97" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_11254FD7F5DB530249B59FB491580C5C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_075E58BB0FD45C4D977F47CFD9ECE35C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayment of capital lease obligations</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_11254FD7F5DB530249B59FB491580C5C_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_075E58BB0FD45C4D977F47CFD9ECE35C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Long-term Capital Lease Obligations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfLongTermCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_075E58BB0FD45C4D977F47CFD9ECE35C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_075E58BB0FD45C4D977F47CFD9ECE35C" xlink:to="lab_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_075E58BB0FD45C4D977F47CFD9ECE35C" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_86BE475E426DB0C6F7649FB49158B786_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_260160EF30215B64B669488600C60276" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cash (used in) provided by financing activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_260160EF30215B64B669488600C60276" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_260160EF30215B64B669488600C60276" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_260160EF30215B64B669488600C60276" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2215406D966B359A85809FB49158805D_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_CC15F6A0C54D513CBE2A78840883AC78" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net increase (decrease) in cash</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2215406D966B359A85809FB49158805D_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_CC15F6A0C54D513CBE2A78840883AC78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Period Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_CC15F6A0C54D513CBE2A78840883AC78" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_CC15F6A0C54D513CBE2A78840883AC78" xlink:to="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_CC15F6A0C54D513CBE2A78840883AC78" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_322F11044AC9E24B6146101EE3CA7128_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_636759A20DD75C89B89AE5E07E28BE51" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated Useful Life for Property and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_322F11044AC9E24B6146101EE3CA7128_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_636759A20DD75C89B89AE5E07E28BE51" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_636759A20DD75C89B89AE5E07E28BE51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_636759A20DD75C89B89AE5E07E28BE51" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_636759A20DD75C89B89AE5E07E28BE51" xlink:type="arc" />
    <link:label id="lab_sigi_DisclosureofShareBasedCompensationExpensesAbstract_743D6A73421A35F2CE94101EE50BE30B_label_en-US" xlink:label="lab_sigi_DisclosureofShareBasedCompensationExpensesAbstract_249B6712EFA652F69FBD9F99B4AD6376" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Share-Based Compensation Expenses [Abstract]</link:label>
    <link:label id="lab_sigi_DisclosureofShareBasedCompensationExpensesAbstract_743D6A73421A35F2CE94101EE50BE30B_documentation_en-US" xlink:label="lab_sigi_DisclosureofShareBasedCompensationExpensesAbstract_249B6712EFA652F69FBD9F99B4AD6376" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of Share-Based Compensation Expenses [Abstract]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DisclosureofShareBasedCompensationExpensesAbstract" xlink:label="loc_sigi_DisclosureofShareBasedCompensationExpensesAbstract_249B6712EFA652F69FBD9F99B4AD6376" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DisclosureofShareBasedCompensationExpensesAbstract_249B6712EFA652F69FBD9F99B4AD6376" xlink:to="lab_sigi_DisclosureofShareBasedCompensationExpensesAbstract_249B6712EFA652F69FBD9F99B4AD6376" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_D1D79BE34DEA95945C80101EE50B1BB0_terseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_531F7C44A47B5A5D9A4EFD4F6B937171" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation expense charged against net income, Before Tax</link:label>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_D1D79BE34DEA95945C80101EE50B1BB0_label_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_531F7C44A47B5A5D9A4EFD4F6B937171" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allocated Share-based Compensation Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_531F7C44A47B5A5D9A4EFD4F6B937171" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpense_531F7C44A47B5A5D9A4EFD4F6B937171" xlink:to="lab_us-gaap_AllocatedShareBasedCompensationExpense_531F7C44A47B5A5D9A4EFD4F6B937171" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_C64DC20D9BF6187FD5D2101EE50BFCD1_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_D873B09387BF59FE86D63B044910C2E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation expense income tax benefit</link:label>
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_C64DC20D9BF6187FD5D2101EE50BFCD1_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_D873B09387BF59FE86D63B044910C2E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Tax Benefit from Compensation Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_D873B09387BF59FE86D63B044910C2E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_D873B09387BF59FE86D63B044910C2E2" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_D873B09387BF59FE86D63B044910C2E2" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_AD97C0B3A29D1E079187101EE50B8A6C_terseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_B04F4D6F01CD582BA3E17CC713547356" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Expense, Net of Tax</link:label>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_AD97C0B3A29D1E079187101EE50B8A6C_label_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_B04F4D6F01CD582BA3E17CC713547356" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allocated Share-based Compensation Expense, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_B04F4D6F01CD582BA3E17CC713547356" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_B04F4D6F01CD582BA3E17CC713547356" xlink:to="lab_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_B04F4D6F01CD582BA3E17CC713547356" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable_90210093D6A0075BD8809FB6FD3C0CB8_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable_1627C9538C8657B3865FF89C29F9D281" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration [Table]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable_90210093D6A0075BD8809FB6FD3C0CB8_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable_1627C9538C8657B3865FF89C29F9D281" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable_1627C9538C8657B3865FF89C29F9D281" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable_1627C9538C8657B3865FF89C29F9D281" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationTable_1627C9538C8657B3865FF89C29F9D281" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems_DA5BDC617A6827F9CC789FB6FD436493_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems_E1E69F637DC05A70963E4572AF1C46DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration [Line Items]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems_DA5BDC617A6827F9CC789FB6FD436493_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems_E1E69F637DC05A70963E4572AF1C46DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems_E1E69F637DC05A70963E4572AF1C46DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems_E1E69F637DC05A70963E4572AF1C46DA" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationLineItems_E1E69F637DC05A70963E4572AF1C46DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne_F7569DCABDD257D94F3B9FB6FD432E74_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne_B376AEB86D965B6BA0C73D6570996588" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year One</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne_F7569DCABDD257D94F3B9FB6FD432E74_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne_B376AEB86D965B6BA0C73D6570996588" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year One</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne_B376AEB86D965B6BA0C73D6570996588" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne_B376AEB86D965B6BA0C73D6570996588" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne_B376AEB86D965B6BA0C73D6570996588" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo_712DB11130D2F71ADAD29FB6FD43C324_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo_9292C9F7D98151C694A703256EC3A156" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Two</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo_712DB11130D2F71ADAD29FB6FD43C324_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo_9292C9F7D98151C694A703256EC3A156" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo_9292C9F7D98151C694A703256EC3A156" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo_9292C9F7D98151C694A703256EC3A156" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo_9292C9F7D98151C694A703256EC3A156" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree_0785B8CF0B94AA61CB579FB6FD43896E_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree_A57CA5B46A8450CCB48CDF7B7E5A8FC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Three</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree_0785B8CF0B94AA61CB579FB6FD43896E_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree_A57CA5B46A8450CCB48CDF7B7E5A8FC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree_A57CA5B46A8450CCB48CDF7B7E5A8FC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree_A57CA5B46A8450CCB48CDF7B7E5A8FC8" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree_A57CA5B46A8450CCB48CDF7B7E5A8FC8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour_531830B8F4CDE1DC863B9FB6FD43BB9A_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour_49E8B1FA98015A36BED4B1DCD42B9B33" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Four</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour_531830B8F4CDE1DC863B9FB6FD43BB9A_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour_49E8B1FA98015A36BED4B1DCD42B9B33" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour_49E8B1FA98015A36BED4B1DCD42B9B33" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour_49E8B1FA98015A36BED4B1DCD42B9B33" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour_49E8B1FA98015A36BED4B1DCD42B9B33" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive_3EDA6C51314779DB05379FB6FD4334DB_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive_ADCECA3D1B3C57E5806FAE85A2D87ED0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Five</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive_3EDA6C51314779DB05379FB6FD4334DB_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive_ADCECA3D1B3C57E5806FAE85A2D87ED0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive_ADCECA3D1B3C57E5806FAE85A2D87ED0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive_ADCECA3D1B3C57E5806FAE85A2D87ED0" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive_ADCECA3D1B3C57E5806FAE85A2D87ED0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix_99D38A780A5C81F3D5349FB6FD43CBE0_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix_56806A8963B453DFBE58305CD9DB974E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Six</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix_99D38A780A5C81F3D5349FB6FD43CBE0_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix_56806A8963B453DFBE58305CD9DB974E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Six</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix_56806A8963B453DFBE58305CD9DB974E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix_56806A8963B453DFBE58305CD9DB974E" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix_56806A8963B453DFBE58305CD9DB974E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven_2F7B68B3FC8C0E6CCDE09FB6FD4380CA_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven_47343CD24BD251BF9E0C6B8799E51E90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Seven</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven_2F7B68B3FC8C0E6CCDE09FB6FD4380CA_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven_47343CD24BD251BF9E0C6B8799E51E90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Seven</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven_47343CD24BD251BF9E0C6B8799E51E90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven_47343CD24BD251BF9E0C6B8799E51E90" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearSeven_47343CD24BD251BF9E0C6B8799E51E90" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight_0C35CFAF4A142C2FACB39FB6FD437627_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight_5C831FF12BA35C4FAE0E32771727F432" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Eight</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight_0C35CFAF4A142C2FACB39FB6FD437627_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight_5C831FF12BA35C4FAE0E32771727F432" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Eight</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight_5C831FF12BA35C4FAE0E32771727F432" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight_5C831FF12BA35C4FAE0E32771727F432" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearEight_5C831FF12BA35C4FAE0E32771727F432" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine_F196A98A818DED49FA4A9FB6FD43306D_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine_0F042E03F5BD5EA2B54C2FA73B58AEC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Nine</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine_F196A98A818DED49FA4A9FB6FD43306D_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine_0F042E03F5BD5EA2B54C2FA73B58AEC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Nine</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine_0F042E03F5BD5EA2B54C2FA73B58AEC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine_0F042E03F5BD5EA2B54C2FA73B58AEC8" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine_0F042E03F5BD5EA2B54C2FA73B58AEC8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen_BAFA5142169B5F0C984E9FB6FD445BFA_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen_67B63D796CD75B1D9C9AD7A3881EE18C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Ten</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen_BAFA5142169B5F0C984E9FB6FD445BFA_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen_67B63D796CD75B1D9C9AD7A3881EE18C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Historical Claims Duration, Year Ten</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen_67B63D796CD75B1D9C9AD7A3881EE18C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen_67B63D796CD75B1D9C9AD7A3881EE18C" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsHistoricalClaimsDurationYearTen_67B63D796CD75B1D9C9AD7A3881EE18C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_12E6C60A3429DDEB45B0101EE6A379AD_verboseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_F08F83BA9D295D028AB123EF31101F21" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Discount rate</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_12E6C60A3429DDEB45B0101EE6A379AD_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_F08F83BA9D295D028AB123EF31101F21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_F08F83BA9D295D028AB123EF31101F21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_F08F83BA9D295D028AB123EF31101F21" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_F08F83BA9D295D028AB123EF31101F21" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_2B8AD46866CE78E89C06101EE6A317BA_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_B38DC254143B585A8FE39E47F7C7F7EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected return on plan assets</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_2B8AD46866CE78E89C06101EE6A317BA_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_B38DC254143B585A8FE39E47F7C7F7EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_B38DC254143B585A8FE39E47F7C7F7EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_B38DC254143B585A8FE39E47F7C7F7EA" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_B38DC254143B585A8FE39E47F7C7F7EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_560349B10615C4F89B07101EE6A35C5C_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_399C1D4CA6FC5C19B682FDB705AB4D7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rate of compensation increase</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_560349B10615C4F89B07101EE6A35C5C_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_399C1D4CA6FC5C19B682FDB705AB4D7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_399C1D4CA6FC5C19B682FDB705AB4D7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_399C1D4CA6FC5C19B682FDB705AB4D7D" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_399C1D4CA6FC5C19B682FDB705AB4D7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_8E912D21F7DB00FD3179101EE6A352BE_verboseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_25B10D42CBCB500085A6B7B1B386D6E6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Discount rate used to value the liability</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_8E912D21F7DB00FD3179101EE6A352BE_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_25B10D42CBCB500085A6B7B1B386D6E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_25B10D42CBCB500085A6B7B1B386D6E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_25B10D42CBCB500085A6B7B1B386D6E6" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_25B10D42CBCB500085A6B7B1B386D6E6" xlink:type="arc" />
    <link:label id="lab_sigi_AsbestosClaimMember_9BD5DB565A72FDFE21CC9FB6F2B2E3B8_terseLabel_en-US" xlink:label="lab_sigi_AsbestosClaimMember_3B342C5FF94B53E0A808D431FD1EE412" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asbestos Claim [Member]</link:label>
    <link:label id="lab_sigi_AsbestosClaimMember_9BD5DB565A72FDFE21CC9FB6F2B2E3B8_label_en-US" xlink:label="lab_sigi_AsbestosClaimMember_3B342C5FF94B53E0A808D431FD1EE412" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asbestos Claim [Member]</link:label>
    <link:label id="lab_sigi_AsbestosClaimMember_9BD5DB565A72FDFE21CC9FB6F2B2E3B8_documentation_en-US" xlink:label="lab_sigi_AsbestosClaimMember_3B342C5FF94B53E0A808D431FD1EE412" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Asbestos Claim [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AsbestosClaimMember" xlink:label="loc_sigi_AsbestosClaimMember_3B342C5FF94B53E0A808D431FD1EE412" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AsbestosClaimMember_3B342C5FF94B53E0A808D431FD1EE412" xlink:to="lab_sigi_AsbestosClaimMember_3B342C5FF94B53E0A808D431FD1EE412" xlink:type="arc" />
    <link:label id="lab_sigi_LandfillSitesRelatedClaimsMember_1396A21B2E4139FC68119FB6F2B20292_terseLabel_en-US" xlink:label="lab_sigi_LandfillSitesRelatedClaimsMember_DE0D869BF04C5E09B8A2C5F50D74F5AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Landfill Sites Related Claims [Member]</link:label>
    <link:label id="lab_sigi_LandfillSitesRelatedClaimsMember_1396A21B2E4139FC68119FB6F2B20292_label_en-US" xlink:label="lab_sigi_LandfillSitesRelatedClaimsMember_DE0D869BF04C5E09B8A2C5F50D74F5AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Landfill Sites Related Claims [Member]</link:label>
    <link:label id="lab_sigi_LandfillSitesRelatedClaimsMember_1396A21B2E4139FC68119FB6F2B20292_documentation_en-US" xlink:label="lab_sigi_LandfillSitesRelatedClaimsMember_DE0D869BF04C5E09B8A2C5F50D74F5AF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents claims related to landfill sites.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LandfillSitesRelatedClaimsMember" xlink:label="loc_sigi_LandfillSitesRelatedClaimsMember_DE0D869BF04C5E09B8A2C5F50D74F5AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LandfillSitesRelatedClaimsMember_DE0D869BF04C5E09B8A2C5F50D74F5AF" xlink:to="lab_sigi_LandfillSitesRelatedClaimsMember_DE0D869BF04C5E09B8A2C5F50D74F5AF" xlink:type="arc" />
    <link:label id="lab_sigi_LeakingUndergroundStorageTanksMember_EAAD0EAF6350DFD7A9E89FB6F2B2B5E3_terseLabel_en-US" xlink:label="lab_sigi_LeakingUndergroundStorageTanksMember_AF429E9128F059FD9156EEF32E10DDB4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leaking Underground Storage Tanks Claims [Member]</link:label>
    <link:label id="lab_sigi_LeakingUndergroundStorageTanksMember_EAAD0EAF6350DFD7A9E89FB6F2B2B5E3_label_en-US" xlink:label="lab_sigi_LeakingUndergroundStorageTanksMember_AF429E9128F059FD9156EEF32E10DDB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Leaking Underground Storage Tanks [Member]</link:label>
    <link:label id="lab_sigi_LeakingUndergroundStorageTanksMember_EAAD0EAF6350DFD7A9E89FB6F2B2B5E3_documentation_en-US" xlink:label="lab_sigi_LeakingUndergroundStorageTanksMember_AF429E9128F059FD9156EEF32E10DDB4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents claims related to leaking underground storage tanks</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LeakingUndergroundStorageTanksMember" xlink:label="loc_sigi_LeakingUndergroundStorageTanksMember_AF429E9128F059FD9156EEF32E10DDB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LeakingUndergroundStorageTanksMember_AF429E9128F059FD9156EEF32E10DDB4" xlink:to="lab_sigi_LeakingUndergroundStorageTanksMember_AF429E9128F059FD9156EEF32E10DDB4" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_3F569D0333E514C2741B9FB6F2B217FA_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_BB3578659750555FBB65F8CB98BA99CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss and Loss expense reserves, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_BB3578659750555FBB65F8CB98BA99CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_BB3578659750555FBB65F8CB98BA99CE" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsGross_BB3578659750555FBB65F8CB98BA99CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_A8237467069D5D98A24E9FB6F2B26650_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_10F0A4CCF72A5D3CB12347D9082DE83B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for Asbestos and Environmental Claims, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet" xlink:label="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_10F0A4CCF72A5D3CB12347D9082DE83B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_10F0A4CCF72A5D3CB12347D9082DE83B" xlink:to="lab_us-gaap_LiabilityForAsbestosAndEnvironmentalClaimsNet_10F0A4CCF72A5D3CB12347D9082DE83B" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeTable_A694DBB69565C43DE018917FB36F03B2_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeTable_B3BA73990ECA5563AA81CD944235B679" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of OTTI By Asset Type [Table]</link:label>
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeTable_A694DBB69565C43DE018917FB36F03B2_label_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeTable_B3BA73990ECA5563AA81CD944235B679" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of OTTI By Asset Type [Table]</link:label>
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeTable_A694DBB69565C43DE018917FB36F03B2_documentation_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeTable_B3BA73990ECA5563AA81CD944235B679" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of other-than-temporary impairments recognized in the statement of income and other comprehensive income by asset type.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfOttiByAssetTypeTable" xlink:label="loc_sigi_ScheduleOfOttiByAssetTypeTable_B3BA73990ECA5563AA81CD944235B679" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfOttiByAssetTypeTable_B3BA73990ECA5563AA81CD944235B679" xlink:to="lab_sigi_ScheduleOfOttiByAssetTypeTable_B3BA73990ECA5563AA81CD944235B679" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeAxis_B8063145CADEEA5EB50A917FB36F3E9E_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeAxis_4F4F9ED27CD25A3B9CDAEABC3E07FDED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of OTTI By Asset Type [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeAxis_B8063145CADEEA5EB50A917FB36F3E9E_label_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeAxis_4F4F9ED27CD25A3B9CDAEABC3E07FDED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of OTTI By Asset Type [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeAxis_B8063145CADEEA5EB50A917FB36F3E9E_documentation_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeAxis_4F4F9ED27CD25A3B9CDAEABC3E07FDED" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of other-than-temporary impairments recognized in the statement of income and other comprehensive income by asset type.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfOttiByAssetTypeAxis" xlink:label="loc_sigi_ScheduleOfOttiByAssetTypeAxis_4F4F9ED27CD25A3B9CDAEABC3E07FDED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfOttiByAssetTypeAxis_4F4F9ED27CD25A3B9CDAEABC3E07FDED" xlink:to="lab_sigi_ScheduleOfOttiByAssetTypeAxis_4F4F9ED27CD25A3B9CDAEABC3E07FDED" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeDomain_729C57912984C5EDDF16917FB370883F_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeDomain_CCCF7DAD06845910B6E1B78994992856" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of OTTI By Asset Type [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeDomain_729C57912984C5EDDF16917FB370883F_label_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeDomain_CCCF7DAD06845910B6E1B78994992856" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Otti By Asset Type [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfOttiByAssetTypeDomain_729C57912984C5EDDF16917FB370883F_documentation_en-US" xlink:label="lab_sigi_ScheduleOfOttiByAssetTypeDomain_CCCF7DAD06845910B6E1B78994992856" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of other-than-temporary impairments recognized in the statement of income and other comprehensive income by asset type.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfOttiByAssetTypeDomain" xlink:label="loc_sigi_ScheduleOfOttiByAssetTypeDomain_CCCF7DAD06845910B6E1B78994992856" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfOttiByAssetTypeDomain_CCCF7DAD06845910B6E1B78994992856" xlink:to="lab_sigi_ScheduleOfOttiByAssetTypeDomain_CCCF7DAD06845910B6E1B78994992856" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairmentOfInvestments_4BC6507EE90187E839F1917FB37145C5_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairmentOfInvestments_91E746996BDA5AE9B35EEC617960A7AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OTTI Losses Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="loc_us-gaap_ImpairmentOfInvestments_91E746996BDA5AE9B35EEC617960A7AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairmentOfInvestments_91E746996BDA5AE9B35EEC617960A7AC" xlink:to="lab_us-gaap_ImpairmentOfInvestments_91E746996BDA5AE9B35EEC617960A7AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest_91D802791CB157D9C546917FB3711FB9_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest_9380C37D51D95AEB9AEC9C4BE9A149A4" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">OTTI included in OCI</link:label>
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest_91D802791CB157D9C546917FB3711FB9_label_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest_9380C37D51D95AEB9AEC9C4BE9A149A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest_9380C37D51D95AEB9AEC9C4BE9A149A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest_9380C37D51D95AEB9AEC9C4BE9A149A4" xlink:to="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest_9380C37D51D95AEB9AEC9C4BE9A149A4" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet_37B9E9CFB68B60B3D85B917FB37119A0_terseLabel_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet_392FF832279C5381A4F51C0238D15EBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total OTTI charges recognized in earnings</link:label>
    <link:label id="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet_37B9E9CFB68B60B3D85B917FB37119A0_label_en-US" xlink:label="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet_392FF832279C5381A4F51C0238D15EBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet" xlink:label="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet_392FF832279C5381A4F51C0238D15EBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet_392FF832279C5381A4F51C0238D15EBB" xlink:to="lab_us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet_392FF832279C5381A4F51C0238D15EBB" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_AF3EA7F9C494996972B3816F59EB1DAF_verboseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_59B9FCF039C35996AF91CCF5FB5E07A5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net realized (losses) gains</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfSecuritiesNet" xlink:label="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_59B9FCF039C35996AF91CCF5FB5E07A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_59B9FCF039C35996AF91CCF5FB5E07A5" xlink:to="lab_us-gaap_GainLossOnSaleOfSecuritiesNet_59B9FCF039C35996AF91CCF5FB5E07A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasic_694E3DF22F4829A74CA5816F59EBF930_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_747967641C2556AEBE65DE51277F3E76" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic net income per share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_747967641C2556AEBE65DE51277F3E76" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic_747967641C2556AEBE65DE51277F3E76" xlink:to="lab_us-gaap_EarningsPerShareBasic_747967641C2556AEBE65DE51277F3E76" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_219F3EC9212787F4705D816F59EB492F_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_433455F2AF785CFF9EA13ED10A98769C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Diluted net income per share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_433455F2AF785CFF9EA13ED10A98769C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted_433455F2AF785CFF9EA13ED10A98769C" xlink:to="lab_us-gaap_EarningsPerShareDiluted_433455F2AF785CFF9EA13ED10A98769C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceTextBlock_F55D34F94279540DD276101EE3A91CC7_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceTextBlock_46448824114C5ACE9F0FAE7E1784B19A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance</link:label>
    <link:label id="lab_us-gaap_ReinsuranceTextBlock_F55D34F94279540DD276101EE3A91CC7_label_en-US" xlink:label="lab_us-gaap_ReinsuranceTextBlock_46448824114C5ACE9F0FAE7E1784B19A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reinsurance [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceTextBlock" xlink:label="loc_us-gaap_ReinsuranceTextBlock_46448824114C5ACE9F0FAE7E1784B19A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceTextBlock_46448824114C5ACE9F0FAE7E1784B19A" xlink:to="lab_us-gaap_ReinsuranceTextBlock_46448824114C5ACE9F0FAE7E1784B19A" xlink:type="arc" />
    <link:label id="lab_sigi_IndebtednessAbstract_5CA256551FF2BCC74ADDA04F73751151_label_en-US" xlink:label="lab_sigi_IndebtednessAbstract_FB9E75DABCFB55DF8E5F9364DC94FEFB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Indebtedness [Abstract]</link:label>
    <link:label id="lab_sigi_IndebtednessAbstract_5CA256551FF2BCC74ADDA04F73751151_documentation_en-US" xlink:label="lab_sigi_IndebtednessAbstract_FB9E75DABCFB55DF8E5F9364DC94FEFB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Indebtedness [Abstract]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_IndebtednessAbstract" xlink:label="loc_sigi_IndebtednessAbstract_FB9E75DABCFB55DF8E5F9364DC94FEFB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_IndebtednessAbstract_FB9E75DABCFB55DF8E5F9364DC94FEFB" xlink:to="lab_sigi_IndebtednessAbstract_FB9E75DABCFB55DF8E5F9364DC94FEFB" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofDebtInstrumentsTable_B80989FD58820B1F5268A04F73757BAC_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofDebtInstrumentsTable_08E9F9EA61DF549E9E49095C80A9559B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Debt Instruments [Table]</link:label>
    <link:label id="lab_sigi_ScheduleofDebtInstrumentsTable_B80989FD58820B1F5268A04F73757BAC_label_en-US" xlink:label="lab_sigi_ScheduleofDebtInstrumentsTable_08E9F9EA61DF549E9E49095C80A9559B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Debt Instruments [Table]</link:label>
    <link:label id="lab_sigi_ScheduleofDebtInstrumentsTable_B80989FD58820B1F5268A04F73757BAC_documentation_en-US" xlink:label="lab_sigi_ScheduleofDebtInstrumentsTable_08E9F9EA61DF549E9E49095C80A9559B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Debt Instruments [Table]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofDebtInstrumentsTable" xlink:label="loc_sigi_ScheduleofDebtInstrumentsTable_08E9F9EA61DF549E9E49095C80A9559B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofDebtInstrumentsTable_08E9F9EA61DF549E9E49095C80A9559B" xlink:to="lab_sigi_ScheduleofDebtInstrumentsTable_08E9F9EA61DF549E9E49095C80A9559B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebtMember_2245D8E111DF35DCBC7AA04F7376C4FB_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtMember_5FEE425DB357507F8206C7D89AC66FF1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt [Member]</link:label>
    <link:label id="lab_us-gaap_LongTermDebtMember_2245D8E111DF35DCBC7AA04F7376C4FB_label_en-US" xlink:label="lab_us-gaap_LongTermDebtMember_5FEE425DB357507F8206C7D89AC66FF1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtMember" xlink:label="loc_us-gaap_LongTermDebtMember_5FEE425DB357507F8206C7D89AC66FF1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtMember_5FEE425DB357507F8206C7D89AC66FF1" xlink:to="lab_us-gaap_LongTermDebtMember_5FEE425DB357507F8206C7D89AC66FF1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentAxis_E2E5EB19AE8FC31CA0BCA04F73763705_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_E408C5B8DBC05AD1A5F8E3A99C6210D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentAxis_E2E5EB19AE8FC31CA0BCA04F73763705_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_E408C5B8DBC05AD1A5F8E3A99C6210D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_E408C5B8DBC05AD1A5F8E3A99C6210D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentAxis_E408C5B8DBC05AD1A5F8E3A99C6210D5" xlink:to="lab_us-gaap_DebtInstrumentAxis_E408C5B8DBC05AD1A5F8E3A99C6210D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_C56C74B6643E601358B4A04F73769686_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_63785C1F79935ECB967F7D5E6C4F95AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_C56C74B6643E601358B4A04F73769686_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_63785C1F79935ECB967F7D5E6C4F95AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_63785C1F79935ECB967F7D5E6C4F95AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_63785C1F79935ECB967F7D5E6C4F95AB" xlink:to="lab_us-gaap_DebtInstrumentNameDomain_63785C1F79935ECB967F7D5E6C4F95AB" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableRateAxis_B1A69F0862237646B1FAA04F73761C43_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis_603AD30CB45F5E81AEBA40FE9BC06B50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableRateAxis_B1A69F0862237646B1FAA04F73761C43_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis_603AD30CB45F5E81AEBA40FE9BC06B50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_603AD30CB45F5E81AEBA40FE9BC06B50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateAxis_603AD30CB45F5E81AEBA40FE9BC06B50" xlink:to="lab_us-gaap_VariableRateAxis_603AD30CB45F5E81AEBA40FE9BC06B50" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableRateDomain_4A4B7424B5BAE180FB47A04F73766808_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateDomain_3D6CE93DF63A5DF5A5721499ED0A8B40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:label id="lab_us-gaap_VariableRateDomain_4A4B7424B5BAE180FB47A04F73766808_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain_3D6CE93DF63A5DF5A5721499ED0A8B40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_3D6CE93DF63A5DF5A5721499ED0A8B40" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateDomain_3D6CE93DF63A5DF5A5721499ED0A8B40" xlink:to="lab_us-gaap_VariableRateDomain_3D6CE93DF63A5DF5A5721499ED0A8B40" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_79E79CFC5FA48B89199FA04F7376D904_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BFAB89C7DD85F89B8A52E5C9AA66194" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_79E79CFC5FA48B89199FA04F7376D904_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BFAB89C7DD85F89B8A52E5C9AA66194" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BFAB89C7DD85F89B8A52E5C9AA66194" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BFAB89C7DD85F89B8A52E5C9AA66194" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BFAB89C7DD85F89B8A52E5C9AA66194" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_290383A636B48FD2AD26A04F7376A426_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_38373EF74CEF5E1AB072C6D9A9D5BA89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_290383A636B48FD2AD26A04F7376A426_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_38373EF74CEF5E1AB072C6D9A9D5BA89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption, Period [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_38373EF74CEF5E1AB072C6D9A9D5BA89" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_38373EF74CEF5E1AB072C6D9A9D5BA89" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPeriodDomain_38373EF74CEF5E1AB072C6D9A9D5BA89" xlink:type="arc" />
    <link:label id="lab_us-gaap_RangeAxis_8E17E4A0544F7C37C30FA04F73770001_terseLabel_en-US" xlink:label="lab_us-gaap_RangeAxis_20BA97956D9D5C97BCD58C7499CB7791" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range [Axis]</link:label>
    <link:label id="lab_us-gaap_RangeAxis_8E17E4A0544F7C37C30FA04F73770001_label_en-US" xlink:label="lab_us-gaap_RangeAxis_20BA97956D9D5C97BCD58C7499CB7791" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_20BA97956D9D5C97BCD58C7499CB7791" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeAxis_20BA97956D9D5C97BCD58C7499CB7791" xlink:to="lab_us-gaap_RangeAxis_20BA97956D9D5C97BCD58C7499CB7791" xlink:type="arc" />
    <link:label id="lab_us-gaap_RangeMember_F20A16A2DFCC6A93C941A04F7377647C_terseLabel_en-US" xlink:label="lab_us-gaap_RangeMember_6BFA43EB1B7C5B79A44A03431EEE61F4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range [Domain]</link:label>
    <link:label id="lab_us-gaap_RangeMember_F20A16A2DFCC6A93C941A04F7377647C_label_en-US" xlink:label="lab_us-gaap_RangeMember_6BFA43EB1B7C5B79A44A03431EEE61F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_6BFA43EB1B7C5B79A44A03431EEE61F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeMember_6BFA43EB1B7C5B79A44A03431EEE61F4" xlink:to="lab_us-gaap_RangeMember_6BFA43EB1B7C5B79A44A03431EEE61F4" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofDebtInstrumentsLineItems_72EDFC85153C877A783EA04F73778D9C_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofDebtInstrumentsLineItems_5F0A8D87D4955C5E874A1E05ED160333" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Debt Instruments [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofDebtInstrumentsLineItems_72EDFC85153C877A783EA04F73778D9C_label_en-US" xlink:label="lab_sigi_ScheduleofDebtInstrumentsLineItems_5F0A8D87D4955C5E874A1E05ED160333" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Debt Instruments [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofDebtInstrumentsLineItems_72EDFC85153C877A783EA04F73778D9C_documentation_en-US" xlink:label="lab_sigi_ScheduleofDebtInstrumentsLineItems_5F0A8D87D4955C5E874A1E05ED160333" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Line Items] for Schedule of Debt Instruments [Table]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofDebtInstrumentsLineItems" xlink:label="loc_sigi_ScheduleofDebtInstrumentsLineItems_5F0A8D87D4955C5E874A1E05ED160333" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofDebtInstrumentsLineItems_5F0A8D87D4955C5E874A1E05ED160333" xlink:to="lab_sigi_ScheduleofDebtInstrumentsLineItems_5F0A8D87D4955C5E874A1E05ED160333" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_B20A044584F19FB9F9B4A04F737730F8_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_26C3C592ABA75E8390A9A783D4E4D273" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_B20A044584F19FB9F9B4A04F737730F8_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_26C3C592ABA75E8390A9A783D4E4D273" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_26C3C592ABA75E8390A9A783D4E4D273" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_26C3C592ABA75E8390A9A783D4E4D273" xlink:to="lab_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_26C3C592ABA75E8390A9A783D4E4D273" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_A8417F8CF2990BFEED36A04F737785E8_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_92EC58C7DAD959BC80DAC45B5960BCB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate</link:label>
    <link:label id="lab_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_A8417F8CF2990BFEED36A04F737785E8_label_en-US" xlink:label="lab_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_92EC58C7DAD959BC80DAC45B5960BCB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_92EC58C7DAD959BC80DAC45B5960BCB0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_92EC58C7DAD959BC80DAC45B5960BCB0" xlink:to="lab_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_92EC58C7DAD959BC80DAC45B5960BCB0" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_85716BB79F34CB273954A04F737728F8_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount_122345F43ECA581BB1799D30C29DB5D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Gross</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_85716BB79F34CB273954A04F737728F8_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount_122345F43ECA581BB1799D30C29DB5D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_122345F43ECA581BB1799D30C29DB5D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_122345F43ECA581BB1799D30C29DB5D2" xlink:to="lab_us-gaap_DebtInstrumentCarryingAmount_122345F43ECA581BB1799D30C29DB5D2" xlink:type="arc" />
    <link:label id="lab_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_471FAF89BF409C85DE86A04F73775F72_verboseLabel_en-US" xlink:label="lab_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_2F34028189B456C6916C49D91140537E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt</link:label>
    <link:label id="lab_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_471FAF89BF409C85DE86A04F73775F72_label_en-US" xlink:label="lab_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_2F34028189B456C6916C49D91140537E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long Term Debt Excluding Debt Discount And Debt Issuance Costs</link:label>
    <link:label id="lab_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_471FAF89BF409C85DE86A04F73775F72_documentation_en-US" xlink:label="lab_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_2F34028189B456C6916C49D91140537E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long Term Debt Excluding Debt Discount And Debt Issuance Costs</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts" xlink:label="loc_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_2F34028189B456C6916C49D91140537E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_2F34028189B456C6916C49D91140537E" xlink:to="lab_sigi_LongTermDebtExcludingDebtDiscountAndDebtIssuanceCosts_2F34028189B456C6916C49D91140537E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2D388F3A3DF2CF605BDE101EE3FBEEDA_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_0A5A80A38A08508BB22FCD0ADF9F1E44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_0A5A80A38A08508BB22FCD0ADF9F1E44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_0A5A80A38A08508BB22FCD0ADF9F1E44" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_0A5A80A38A08508BB22FCD0ADF9F1E44" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_0A9FEF5747080F030FE1101EE3FC6AD6_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41BA5666972C5935853E6663E0AA093B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_0A9FEF5747080F030FE1101EE3FC6AD6_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41BA5666972C5935853E6663E0AA093B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41BA5666972C5935853E6663E0AA093B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41BA5666972C5935853E6663E0AA093B" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41BA5666972C5935853E6663E0AA093B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_B1AB4FB578045F09791A9FB766816A56_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_24C7CF6C31375A0F83ED2CF4A0167EA1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principles of Consolidation</link:label>
    <link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_B1AB4FB578045F09791A9FB766816A56_label_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_24C7CF6C31375A0F83ED2CF4A0167EA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:label="loc_us-gaap_ConsolidationPolicyTextBlock_24C7CF6C31375A0F83ED2CF4A0167EA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsolidationPolicyTextBlock_24C7CF6C31375A0F83ED2CF4A0167EA1" xlink:to="lab_us-gaap_ConsolidationPolicyTextBlock_24C7CF6C31375A0F83ED2CF4A0167EA1" xlink:type="arc" />
    <link:label id="lab_us-gaap_UseOfEstimates_A3DD4713FB84EC35B61F9FB76681D23B_terseLabel_en-US" xlink:label="lab_us-gaap_UseOfEstimates_A7B9FB85FC7154018A1F293875A68021" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Use of Estimates</link:label>
    <link:label id="lab_us-gaap_UseOfEstimates_A3DD4713FB84EC35B61F9FB76681D23B_label_en-US" xlink:label="lab_us-gaap_UseOfEstimates_A7B9FB85FC7154018A1F293875A68021" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Use of Estimates, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_A7B9FB85FC7154018A1F293875A68021" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UseOfEstimates_A7B9FB85FC7154018A1F293875A68021" xlink:to="lab_us-gaap_UseOfEstimates_A7B9FB85FC7154018A1F293875A68021" xlink:type="arc" />
    <link:label id="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_A594406F41A6CE7119379FB766811150_terseLabel_en-US" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_2EAF1E4E155754FCB504689DB1E7223D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassifications</link:label>
    <link:label id="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_A594406F41A6CE7119379FB766811150_label_en-US" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_2EAF1E4E155754FCB504689DB1E7223D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription_2EAF1E4E155754FCB504689DB1E7223D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription_2EAF1E4E155754FCB504689DB1E7223D" xlink:to="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_2EAF1E4E155754FCB504689DB1E7223D" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentPolicyTextBlock_99719E522BA799A6A5B39FB76682C8CC_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock_07BF73FCDE955E0BA832D747E85F2CD5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments</link:label>
    <link:label id="lab_us-gaap_InvestmentPolicyTextBlock_99719E522BA799A6A5B39FB76682C8CC_label_en-US" xlink:label="lab_us-gaap_InvestmentPolicyTextBlock_07BF73FCDE955E0BA832D747E85F2CD5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentPolicyTextBlock" xlink:label="loc_us-gaap_InvestmentPolicyTextBlock_07BF73FCDE955E0BA832D747E85F2CD5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentPolicyTextBlock_07BF73FCDE955E0BA832D747E85F2CD5" xlink:to="lab_us-gaap_InvestmentPolicyTextBlock_07BF73FCDE955E0BA832D747E85F2CD5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_A6D9A01E194E572582109FB76682007D_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_BF836826DE015A84818E1954CA617446" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Instruments</link:label>
    <link:label id="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_A6D9A01E194E572582109FB76682007D_label_en-US" xlink:label="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_BF836826DE015A84818E1954CA617446" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Instruments, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_BF836826DE015A84818E1954CA617446" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_BF836826DE015A84818E1954CA617446" xlink:to="lab_us-gaap_FairValueOfFinancialInstrumentsPolicy_BF836826DE015A84818E1954CA617446" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy_6F84726265A7FA90EF879FB7668251C6_terseLabel_en-US" xlink:label="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy_094DA7216A79581280BBA6405712610F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for Doubtful Accounts</link:label>
    <link:label id="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy_6F84726265A7FA90EF879FB7668251C6_label_en-US" xlink:label="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy_094DA7216A79581280BBA6405712610F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums Receivable, Allowance for Doubtful Accounts, Estimation Methodology, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy" xlink:label="loc_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy_094DA7216A79581280BBA6405712610F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy_094DA7216A79581280BBA6405712610F" xlink:to="lab_us-gaap_PremiumsReceivableAllowanceForDoubtfulAccountsEstimationMethodologyPolicy_094DA7216A79581280BBA6405712610F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_421B9820CAD825821AA59FB766825F39_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_D4F3517057515C449FF0E6DD23E4468D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-Based Compensation</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_421B9820CAD825821AA59FB766825F39_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_D4F3517057515C449FF0E6DD23E4468D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_D4F3517057515C449FF0E6DD23E4468D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_D4F3517057515C449FF0E6DD23E4468D" xlink:to="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_D4F3517057515C449FF0E6DD23E4468D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceAccountingPolicy_AD71AC111E90C3572FEB9FB76682D512_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceAccountingPolicy_18A360E799A2581397CC7CF054BC80D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance</link:label>
    <link:label id="lab_us-gaap_ReinsuranceAccountingPolicy_AD71AC111E90C3572FEB9FB76682D512_label_en-US" xlink:label="lab_us-gaap_ReinsuranceAccountingPolicy_18A360E799A2581397CC7CF054BC80D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reinsurance Accounting Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceAccountingPolicy" xlink:label="loc_us-gaap_ReinsuranceAccountingPolicy_18A360E799A2581397CC7CF054BC80D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceAccountingPolicy_18A360E799A2581397CC7CF054BC80D7" xlink:to="lab_us-gaap_ReinsuranceAccountingPolicy_18A360E799A2581397CC7CF054BC80D7" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9EB1878052095DB442049FB7668277A7_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_4420903F0A13522E83120F315E6C4393" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_9EB1878052095DB442049FB7668277A7_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_4420903F0A13522E83120F315E6C4393" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_4420903F0A13522E83120F315E6C4393" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_4420903F0A13522E83120F315E6C4393" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_4420903F0A13522E83120F315E6C4393" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_0D24B3FD1DE8E9EA24C69FB76682B367_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_98D1D4F0E50E5675814843BF485EF35D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Policy Acquisition Costs</link:label>
    <link:label id="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_0D24B3FD1DE8E9EA24C69FB76682B367_label_en-US" xlink:label="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_98D1D4F0E50E5675814843BF485EF35D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Policy Acquisition Costs, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy" xlink:label="loc_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_98D1D4F0E50E5675814843BF485EF35D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_98D1D4F0E50E5675814843BF485EF35D" xlink:to="lab_us-gaap_CapitalizationOfDeferredPolicyAcquisitionCostsPolicy_98D1D4F0E50E5675814843BF485EF35D" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_BC632FA577C7780908A39FB766820ADE_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_41ECC0F291655F3FA06EC96440D1E5AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_BC632FA577C7780908A39FB766820ADE_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_41ECC0F291655F3FA06EC96440D1E5AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_41ECC0F291655F3FA06EC96440D1E5AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_41ECC0F291655F3FA06EC96440D1E5AC" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_41ECC0F291655F3FA06EC96440D1E5AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_6BAADC43606C5AB73DAA9FB766828BF2_terseLabel_en-US" xlink:label="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_F4740492F905562A902DFAAAA98FE8FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reserve for Loss and Loss Expense</link:label>
    <link:label id="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_6BAADC43606C5AB73DAA9FB766828BF2_label_en-US" xlink:label="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_F4740492F905562A902DFAAAA98FE8FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy" xlink:label="loc_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_F4740492F905562A902DFAAAA98FE8FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_F4740492F905562A902DFAAAA98FE8FD" xlink:to="lab_us-gaap_UnpaidPolicyClaimsAndClaimsAdjustmentExpensePolicy_F4740492F905562A902DFAAAA98FE8FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_DAD599C610A42B7576CF9FB76682C239_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock_BF639FB8DDCF52AB821479FFBC2C4E8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue Recognition</link:label>
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_DAD599C610A42B7576CF9FB76682C239_label_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock_BF639FB8DDCF52AB821479FFBC2C4E8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue Recognition, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_BF639FB8DDCF52AB821479FFBC2C4E8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRecognitionPolicyTextBlock_BF639FB8DDCF52AB821479FFBC2C4E8D" xlink:to="lab_us-gaap_RevenueRecognitionPolicyTextBlock_BF639FB8DDCF52AB821479FFBC2C4E8D" xlink:type="arc" />
    <link:label id="lab_us-gaap_PolicyholdersDividendPolicy_2159BDF9A6C5DC483DEC9FB766823599_terseLabel_en-US" xlink:label="lab_us-gaap_PolicyholdersDividendPolicy_395F60EBF4555E16A077F9548A22C156" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends to Policyholders</link:label>
    <link:label id="lab_us-gaap_PolicyholdersDividendPolicy_2159BDF9A6C5DC483DEC9FB766823599_label_en-US" xlink:label="lab_us-gaap_PolicyholdersDividendPolicy_395F60EBF4555E16A077F9548A22C156" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Policyholders' Dividend [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PolicyholdersDividendPolicy" xlink:label="loc_us-gaap_PolicyholdersDividendPolicy_395F60EBF4555E16A077F9548A22C156" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PolicyholdersDividendPolicy_395F60EBF4555E16A077F9548A22C156" xlink:to="lab_us-gaap_PolicyholdersDividendPolicy_395F60EBF4555E16A077F9548A22C156" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_5092F135DD6F8E3051B99FB766827F52_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock_4EE90D6BF0FC5C5782A16DDDE8CDD86B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Income Tax</link:label>
    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_5092F135DD6F8E3051B99FB766827F52_label_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock_4EE90D6BF0FC5C5782A16DDDE8CDD86B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock_4EE90D6BF0FC5C5782A16DDDE8CDD86B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxPolicyTextBlock_4EE90D6BF0FC5C5782A16DDDE8CDD86B" xlink:to="lab_us-gaap_IncomeTaxPolicyTextBlock_4EE90D6BF0FC5C5782A16DDDE8CDD86B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeLeasesPolicyTextBlock_4D358A80D69B8C749A4C9FB76682768E_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeLeasesPolicyTextBlock_6A61BA79BD665DA0AFEC621B3544D7BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leases</link:label>
    <link:label id="lab_us-gaap_LesseeLeasesPolicyTextBlock_4D358A80D69B8C749A4C9FB76682768E_label_en-US" xlink:label="lab_us-gaap_LesseeLeasesPolicyTextBlock_6A61BA79BD665DA0AFEC621B3544D7BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Leases [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LesseeLeasesPolicyTextBlock" xlink:label="loc_us-gaap_LesseeLeasesPolicyTextBlock_6A61BA79BD665DA0AFEC621B3544D7BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeLeasesPolicyTextBlock_6A61BA79BD665DA0AFEC621B3544D7BF" xlink:to="lab_us-gaap_LesseeLeasesPolicyTextBlock_6A61BA79BD665DA0AFEC621B3544D7BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy_8A047712999F0EA8A7259FB76682332F_terseLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy_E082306C5CDC5488A34FD5DB7D5EDEA2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension</link:label>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy_8A047712999F0EA8A7259FB76682332F_label_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy_E082306C5CDC5488A34FD5DB7D5EDEA2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension and Other Postretirement Plans, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementPlansPolicy" xlink:label="loc_us-gaap_PensionAndOtherPostretirementPlansPolicy_E082306C5CDC5488A34FD5DB7D5EDEA2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionAndOtherPostretirementPlansPolicy_E082306C5CDC5488A34FD5DB7D5EDEA2" xlink:to="lab_us-gaap_PensionAndOtherPostretirementPlansPolicy_E082306C5CDC5488A34FD5DB7D5EDEA2" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionsAbstract_240D87485CF948F4438B101EE6E30DB7_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsAbstract_ABD7979E39F2588BBB3221285C6F4E9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_ABD7979E39F2588BBB3221285C6F4E9E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract_ABD7979E39F2588BBB3221285C6F4E9E" xlink:to="lab_us-gaap_RelatedPartyTransactionsAbstract_ABD7979E39F2588BBB3221285C6F4E9E" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_4D1B7B88616886C0B60B101EE6E3ABE0_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_91EA666941505502A93AD0F10B006963" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transactions</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_4D1B7B88616886C0B60B101EE6E3ABE0_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_91EA666941505502A93AD0F10B006963" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_91EA666941505502A93AD0F10B006963" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_91EA666941505502A93AD0F10B006963" xlink:to="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_91EA666941505502A93AD0F10B006963" xlink:type="arc" />
    <link:label id="lab_sigi_DocumentAndEntityInformationAbstract_B13EF4858E79C4F64BED101EE4821C9E_label_en-US" xlink:label="lab_sigi_DocumentAndEntityInformationAbstract_CEBA72A17121509B8D6F5E5559503074" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document and Entity Information [Abstract]</link:label>
    <link:label id="lab_sigi_DocumentAndEntityInformationAbstract_B13EF4858E79C4F64BED101EE4821C9E_documentation_en-US" xlink:label="lab_sigi_DocumentAndEntityInformationAbstract_CEBA72A17121509B8D6F5E5559503074" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Document and Entity Information [Abstract]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DocumentAndEntityInformationAbstract" xlink:label="loc_sigi_DocumentAndEntityInformationAbstract_CEBA72A17121509B8D6F5E5559503074" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DocumentAndEntityInformationAbstract_CEBA72A17121509B8D6F5E5559503074" xlink:to="lab_sigi_DocumentAndEntityInformationAbstract_CEBA72A17121509B8D6F5E5559503074" xlink:type="arc" />
    <link:label id="lab_dei_DocumentType_79A2CC465CDEDFB9BC62101EE4821D55_terseLabel_en-US" xlink:label="lab_dei_DocumentType_CE90AEA4BA8055B083FEB698FDF13011" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_79A2CC465CDEDFB9BC62101EE4821D55_label_en-US" xlink:label="lab_dei_DocumentType_CE90AEA4BA8055B083FEB698FDF13011" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_CE90AEA4BA8055B083FEB698FDF13011" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType_CE90AEA4BA8055B083FEB698FDF13011" xlink:to="lab_dei_DocumentType_CE90AEA4BA8055B083FEB698FDF13011" xlink:type="arc" />
    <link:label id="lab_dei_AmendmentFlag_FC9F71AE5A0C54CA2F36101EE482705C_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag_3638FE9B18F45CCF9BF437E206EB5B9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_FC9F71AE5A0C54CA2F36101EE482705C_label_en-US" xlink:label="lab_dei_AmendmentFlag_3638FE9B18F45CCF9BF437E206EB5B9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_3638FE9B18F45CCF9BF437E206EB5B9E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag_3638FE9B18F45CCF9BF437E206EB5B9E" xlink:to="lab_dei_AmendmentFlag_3638FE9B18F45CCF9BF437E206EB5B9E" xlink:type="arc" />
    <link:label id="lab_dei_DocumentPeriodEndDate_F7D34C6CACEA51D34366101EE4828801_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_3E182E7EE8FC59A9AA4F31EA9EF11ECC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_F7D34C6CACEA51D34366101EE4828801_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_3E182E7EE8FC59A9AA4F31EA9EF11ECC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_3E182E7EE8FC59A9AA4F31EA9EF11ECC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate_3E182E7EE8FC59A9AA4F31EA9EF11ECC" xlink:to="lab_dei_DocumentPeriodEndDate_3E182E7EE8FC59A9AA4F31EA9EF11ECC" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalYearFocus_109E64E35412499AC5E7101EE48224DE_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_B3ACCAE6C7965ABC9A3CA4A5196B05F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalYearFocus_109E64E35412499AC5E7101EE48224DE_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_B3ACCAE6C7965ABC9A3CA4A5196B05F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_B3ACCAE6C7965ABC9A3CA4A5196B05F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus_B3ACCAE6C7965ABC9A3CA4A5196B05F5" xlink:to="lab_dei_DocumentFiscalYearFocus_B3ACCAE6C7965ABC9A3CA4A5196B05F5" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_491F5E63078C01C3A42B101EE482FC23_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_5433D0F37FA25D3497DA61DB3B9B26E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_491F5E63078C01C3A42B101EE482FC23_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_5433D0F37FA25D3497DA61DB3B9B26E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_5433D0F37FA25D3497DA61DB3B9B26E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalPeriodFocus_5433D0F37FA25D3497DA61DB3B9B26E8" xlink:to="lab_dei_DocumentFiscalPeriodFocus_5433D0F37FA25D3497DA61DB3B9B26E8" xlink:type="arc" />
    <link:label id="lab_dei_EntityRegistrantName_18FFEC42DBC1F75731EC101EE4825BD5_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName_C38C2BE849C85B05A4B18C1B83234033" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_18FFEC42DBC1F75731EC101EE4825BD5_label_en-US" xlink:label="lab_dei_EntityRegistrantName_C38C2BE849C85B05A4B18C1B83234033" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_C38C2BE849C85B05A4B18C1B83234033" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName_C38C2BE849C85B05A4B18C1B83234033" xlink:to="lab_dei_EntityRegistrantName_C38C2BE849C85B05A4B18C1B83234033" xlink:type="arc" />
    <link:label id="lab_dei_EntityCentralIndexKey_0BD7F43694752A1CED5D101EE482B722_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey_0417862FAEB958FDA1E4CAF0A8D77214" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_0BD7F43694752A1CED5D101EE482B722_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey_0417862FAEB958FDA1E4CAF0A8D77214" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_0417862FAEB958FDA1E4CAF0A8D77214" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey_0417862FAEB958FDA1E4CAF0A8D77214" xlink:to="lab_dei_EntityCentralIndexKey_0417862FAEB958FDA1E4CAF0A8D77214" xlink:type="arc" />
    <link:label id="lab_dei_CurrentFiscalYearEndDate_650E715C3406719968D4101EE48206D6_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_F4E782CB04B553B89160D69CFD087225" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_650E715C3406719968D4101EE48206D6_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_F4E782CB04B553B89160D69CFD087225" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_F4E782CB04B553B89160D69CFD087225" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate_F4E782CB04B553B89160D69CFD087225" xlink:to="lab_dei_CurrentFiscalYearEndDate_F4E782CB04B553B89160D69CFD087225" xlink:type="arc" />
    <link:label id="lab_dei_EntityWellKnownSeasonedIssuer_51FE2301E8511E3ABF21101EE4828048_terseLabel_en-US" xlink:label="lab_dei_EntityWellKnownSeasonedIssuer_0FA9433DD5795B7CAFAD4A67D80B0579" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Well-known Seasoned Issuer</link:label>
    <link:label id="lab_dei_EntityWellKnownSeasonedIssuer_51FE2301E8511E3ABF21101EE4828048_label_en-US" xlink:label="lab_dei_EntityWellKnownSeasonedIssuer_0FA9433DD5795B7CAFAD4A67D80B0579" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Well-known Seasoned Issuer</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_0FA9433DD5795B7CAFAD4A67D80B0579" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityWellKnownSeasonedIssuer_0FA9433DD5795B7CAFAD4A67D80B0579" xlink:to="lab_dei_EntityWellKnownSeasonedIssuer_0FA9433DD5795B7CAFAD4A67D80B0579" xlink:type="arc" />
    <link:label id="lab_dei_EntityVoluntaryFilers_5131FCDFC21E6C27DC34101EE4825E4B_terseLabel_en-US" xlink:label="lab_dei_EntityVoluntaryFilers_230CE501F2A25F95B949DAEA77712139" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:label id="lab_dei_EntityVoluntaryFilers_5131FCDFC21E6C27DC34101EE4825E4B_label_en-US" xlink:label="lab_dei_EntityVoluntaryFilers_230CE501F2A25F95B949DAEA77712139" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_230CE501F2A25F95B949DAEA77712139" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityVoluntaryFilers_230CE501F2A25F95B949DAEA77712139" xlink:to="lab_dei_EntityVoluntaryFilers_230CE501F2A25F95B949DAEA77712139" xlink:type="arc" />
    <link:label id="lab_dei_EntityCurrentReportingStatus_4B8393A9C786CD0CFACC101EE4821DAB_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_F63F99A32E715BAD8B34CC16C4BFCAC2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_4B8393A9C786CD0CFACC101EE4821DAB_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_F63F99A32E715BAD8B34CC16C4BFCAC2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_F63F99A32E715BAD8B34CC16C4BFCAC2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus_F63F99A32E715BAD8B34CC16C4BFCAC2" xlink:to="lab_dei_EntityCurrentReportingStatus_F63F99A32E715BAD8B34CC16C4BFCAC2" xlink:type="arc" />
    <link:label id="lab_dei_EntityFilerCategory_4C928B86E92759474196101EE483124D_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory_14824DFBDE2B532DBC5EE43F1397156C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:label id="lab_dei_EntityFilerCategory_4C928B86E92759474196101EE483124D_label_en-US" xlink:label="lab_dei_EntityFilerCategory_14824DFBDE2B532DBC5EE43F1397156C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_14824DFBDE2B532DBC5EE43F1397156C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory_14824DFBDE2B532DBC5EE43F1397156C" xlink:to="lab_dei_EntityFilerCategory_14824DFBDE2B532DBC5EE43F1397156C" xlink:type="arc" />
    <link:label id="lab_dei_EntityPublicFloat_ADF3784790FE16AAC87C101EE48376C9_terseLabel_en-US" xlink:label="lab_dei_EntityPublicFloat_90D9146EA0FC5B05BE99D091F4492181" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Public Float</link:label>
    <link:label id="lab_dei_EntityPublicFloat_ADF3784790FE16AAC87C101EE48376C9_label_en-US" xlink:label="lab_dei_EntityPublicFloat_90D9146EA0FC5B05BE99D091F4492181" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Public Float</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_90D9146EA0FC5B05BE99D091F4492181" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityPublicFloat_90D9146EA0FC5B05BE99D091F4492181" xlink:to="lab_dei_EntityPublicFloat_90D9146EA0FC5B05BE99D091F4492181" xlink:type="arc" />
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_1301DFD7CEC7828295AC101EE4833553_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_8F210401A66D54D598E80D335C8A0659" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_1301DFD7CEC7828295AC101EE4833553_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_8F210401A66D54D598E80D335C8A0659" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_8F210401A66D54D598E80D335C8A0659" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding_8F210401A66D54D598E80D335C8A0659" xlink:to="lab_dei_EntityCommonStockSharesOutstanding_8F210401A66D54D598E80D335C8A0659" xlink:type="arc" />
    <link:label id="lab_dei_DocumentInformationTable_F46A58F846F49583DD0A101EE483DD60_label_en-US" xlink:label="lab_dei_DocumentInformationTable_B40D73DD2F8E5A95ADDA0C9D13DC5691" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information [Table]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_B40D73DD2F8E5A95ADDA0C9D13DC5691" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationTable_B40D73DD2F8E5A95ADDA0C9D13DC5691" xlink:to="lab_dei_DocumentInformationTable_B40D73DD2F8E5A95ADDA0C9D13DC5691" xlink:type="arc" />
    <link:label id="lab_dei_DocumentInformationDocumentAxis_56002640B5CDA5B3BCDB101EE4836E9B_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationDocumentAxis_F15C66A39F78543D8DABEE30DDB4ABBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Information, Document [Axis]</link:label>
    <link:label id="lab_dei_DocumentInformationDocumentAxis_56002640B5CDA5B3BCDB101EE4836E9B_label_en-US" xlink:label="lab_dei_DocumentInformationDocumentAxis_F15C66A39F78543D8DABEE30DDB4ABBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information, Document [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationDocumentAxis" xlink:label="loc_dei_DocumentInformationDocumentAxis_F15C66A39F78543D8DABEE30DDB4ABBE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationDocumentAxis_F15C66A39F78543D8DABEE30DDB4ABBE" xlink:to="lab_dei_DocumentInformationDocumentAxis_F15C66A39F78543D8DABEE30DDB4ABBE" xlink:type="arc" />
    <link:label id="lab_dei_DocumentDomain_90572D5E7A155350839E101EE483151B_terseLabel_en-US" xlink:label="lab_dei_DocumentDomain_3C8CAAED36C55F8C892A9AF5C3FDBA99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document [Domain]</link:label>
    <link:label id="lab_dei_DocumentDomain_90572D5E7A155350839E101EE483151B_label_en-US" xlink:label="lab_dei_DocumentDomain_3C8CAAED36C55F8C892A9AF5C3FDBA99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentDomain" xlink:label="loc_dei_DocumentDomain_3C8CAAED36C55F8C892A9AF5C3FDBA99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentDomain_3C8CAAED36C55F8C892A9AF5C3FDBA99" xlink:to="lab_dei_DocumentDomain_3C8CAAED36C55F8C892A9AF5C3FDBA99" xlink:type="arc" />
    <link:label id="lab_dei_DocumentInformationLineItems_D29665DCCE4B4FA3517A101EE48325BA_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationLineItems_A0D57658BAD25D5AA0B6EF0B897EB8A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Information [Line Items]</link:label>
    <link:label id="lab_dei_DocumentInformationLineItems_D29665DCCE4B4FA3517A101EE48325BA_label_en-US" xlink:label="lab_dei_DocumentInformationLineItems_A0D57658BAD25D5AA0B6EF0B897EB8A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_A0D57658BAD25D5AA0B6EF0B897EB8A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationLineItems_A0D57658BAD25D5AA0B6EF0B897EB8A4" xlink:to="lab_dei_DocumentInformationLineItems_A0D57658BAD25D5AA0B6EF0B897EB8A4" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_2CA889E5543F9A775AC4101EE3E3C219_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_0A3642864D4D5B0C96CBA996EA686262" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Future Minimum Rental Commitments For Non-Cancelable Leases</link:label>
    <link:label id="lab_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_2CA889E5543F9A775AC4101EE3E3C219_label_en-US" xlink:label="lab_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_0A3642864D4D5B0C96CBA996EA686262" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Future Minimum Rental Commitments For Non-Cancelable Leases [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_2CA889E5543F9A775AC4101EE3E3C219_documentation_en-US" xlink:label="lab_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_0A3642864D4D5B0C96CBA996EA686262" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for capital and operating leases having initial or remaining non-cancelable lease terms in excess of one year and the total minimum rentals to be received in the future under non-cancelable subleases as of the balance sheet date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock" xlink:label="loc_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_0A3642864D4D5B0C96CBA996EA686262" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_0A3642864D4D5B0C96CBA996EA686262" xlink:to="lab_sigi_ScheduleofFutureMinimumRentalCommitmentsForNonCancelableLeasesTableTextBlock_0A3642864D4D5B0C96CBA996EA686262" xlink:type="arc" />
    <link:label id="lab_sigi_FairValueAssetsLiabilitiesDisclosedTable_A2284269219506EFD2E1B0AD995A018C_terseLabel_en-US" xlink:label="lab_sigi_FairValueAssetsLiabilitiesDisclosedTable_0F0A54708D69598890915303BEB34D61" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Assets Liabilities Disclosed [Table]</link:label>
    <link:label id="lab_sigi_FairValueAssetsLiabilitiesDisclosedTable_A2284269219506EFD2E1B0AD995A018C_label_en-US" xlink:label="lab_sigi_FairValueAssetsLiabilitiesDisclosedTable_0F0A54708D69598890915303BEB34D61" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Assets Liabilities Disclosed [Table]</link:label>
    <link:label id="lab_sigi_FairValueAssetsLiabilitiesDisclosedTable_A2284269219506EFD2E1B0AD995A018C_documentation_en-US" xlink:label="lab_sigi_FairValueAssetsLiabilitiesDisclosedTable_0F0A54708D69598890915303BEB34D61" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of assets and liabilities that are disclosed at fair value.  The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FairValueAssetsLiabilitiesDisclosedTable" xlink:label="loc_sigi_FairValueAssetsLiabilitiesDisclosedTable_0F0A54708D69598890915303BEB34D61" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FairValueAssetsLiabilitiesDisclosedTable_0F0A54708D69598890915303BEB34D61" xlink:to="lab_sigi_FairValueAssetsLiabilitiesDisclosedTable_0F0A54708D69598890915303BEB34D61" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_1B0A3288314C11042307101EE4482776_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_00ED6CD6309A522FA11CD493A6ED47F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components of Comprehensive Income-Gross and Net of Tax</link:label>
    <link:label id="lab_us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_1B0A3288314C11042307101EE4482776_label_en-US" xlink:label="lab_us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_00ED6CD6309A522FA11CD493A6ED47F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss) [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_00ED6CD6309A522FA11CD493A6ED47F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_00ED6CD6309A522FA11CD493A6ED47F7" xlink:to="lab_us-gaap_ScheduleOfComprehensiveIncomeLossTableTextBlock_00ED6CD6309A522FA11CD493A6ED47F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_7A6927788ECA992941DD101EE4490E29_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_178BDE79AE405D2C8D33B77D47AE319D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components of Accumulated Other Comprehensive Income</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_7A6927788ECA992941DD101EE4490E29_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_178BDE79AE405D2C8D33B77D47AE319D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_178BDE79AE405D2C8D33B77D47AE319D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_178BDE79AE405D2C8D33B77D47AE319D" xlink:to="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_178BDE79AE405D2C8D33B77D47AE319D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_9976F3A86990385A1A54101EE4494D9C_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_6877CF388AC352A6BFF9B02824A57E03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reclassification out of Accumulated Other Comprehensive Income</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_9976F3A86990385A1A54101EE4494D9C_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_6877CF388AC352A6BFF9B02824A57E03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_6877CF388AC352A6BFF9B02824A57E03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_6877CF388AC352A6BFF9B02824A57E03" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_6877CF388AC352A6BFF9B02824A57E03" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_5B084370348A5AF83661A04F73300E08_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract_3061E40ACD2858F69B07FD02B4DBA3FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_3061E40ACD2858F69B07FD02B4DBA3FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_3061E40ACD2858F69B07FD02B4DBA3FD" xlink:to="lab_us-gaap_IncomeTaxDisclosureAbstract_3061E40ACD2858F69B07FD02B4DBA3FD" xlink:type="arc" />
    <link:label id="lab_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_E02B57B4ED3250AD934EA07596218F9F_terseLabel_en-US" xlink:label="lab_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_A0BC3834BDB85FF38586C34668B10158" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in Net Deferred Federal Income Tax Assets</link:label>
    <link:label id="lab_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_E02B57B4ED3250AD934EA07596218F9F_label_en-US" xlink:label="lab_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_A0BC3834BDB85FF38586C34668B10158" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in Net Deferred Federal Income Tax Assets</link:label>
    <link:label id="lab_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_E02B57B4ED3250AD934EA07596218F9F_documentation_en-US" xlink:label="lab_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_A0BC3834BDB85FF38586C34668B10158" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change in Net Deferred Federal Income Tax Assets</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ChangeinNetDeferredFederalIncomeTaxAssets" xlink:label="loc_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_A0BC3834BDB85FF38586C34668B10158" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_A0BC3834BDB85FF38586C34668B10158" xlink:to="lab_sigi_ChangeinNetDeferredFederalIncomeTaxAssets_A0BC3834BDB85FF38586C34668B10158" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_1B077BE7BF3493176F49A04F733163E8_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_692268B1D74D5B408FACB7806978C6BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net loss reserve discounting</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_1B077BE7BF3493176F49A04F733163E8_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_692268B1D74D5B408FACB7806978C6BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_692268B1D74D5B408FACB7806978C6BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_692268B1D74D5B408FACB7806978C6BA" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves_692268B1D74D5B408FACB7806978C6BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_1987064914B44B14527BA04F7331F98D_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_7A6CE1C221A0588B850B4C552EC8DB49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net unearned premiums</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_1987064914B44B14527BA04F7331F98D_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_7A6CE1C221A0588B850B4C552EC8DB49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Reserve</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_7A6CE1C221A0588B850B4C552EC8DB49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_7A6CE1C221A0588B850B4C552EC8DB49" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve_7A6CE1C221A0588B850B4C552EC8DB49" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_F150C6B7014A5429C1EEA04F7331187D_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_BB410B1010095951B478432F631B225B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee benefits</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_F150C6B7014A5429C1EEA04F7331187D_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_BB410B1010095951B478432F631B225B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_BB410B1010095951B478432F631B225B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_BB410B1010095951B478432F631B225B" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_BB410B1010095951B478432F631B225B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_E50C74A7EE3D03ACD829A04F73314282_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_87764F8E2BC3518B987E46D2C3584558" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term incentive compensation plans</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_E50C74A7EE3D03ACD829A04F73314282_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_87764F8E2BC3518B987E46D2C3584558" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_87764F8E2BC3518B987E46D2C3584558" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_87764F8E2BC3518B987E46D2C3584558" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_87764F8E2BC3518B987E46D2C3584558" xlink:type="arc" />
    <link:label id="lab_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_1EA83BC25660F11372EDA04F73315DCE_terseLabel_en-US" xlink:label="lab_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_CD4F0FC1F26E5590A80BC3D6F649F269" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Temporary investment write-downs</link:label>
    <link:label id="lab_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_1EA83BC25660F11372EDA04F73315DCE_label_en-US" xlink:label="lab_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_CD4F0FC1F26E5590A80BC3D6F649F269" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets Unrealized Losses On Securities Gross</link:label>
    <link:label id="lab_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_1EA83BC25660F11372EDA04F73315DCE_documentation_en-US" xlink:label="lab_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_CD4F0FC1F26E5590A80BC3D6F649F269" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The tax effect as of the balance sheet date of the amount of the estimated future tax deductions, before any related valuation allowance, arising from unrealized losses on securities which can only be deducted for tax purposes when the losses are realized, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross" xlink:label="loc_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_CD4F0FC1F26E5590A80BC3D6F649F269" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_CD4F0FC1F26E5590A80BC3D6F649F269" xlink:to="lab_sigi_DeferredTaxAssetsUnrealizedLossesOnSecuritiesGross_CD4F0FC1F26E5590A80BC3D6F649F269" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsInvestments_757552D9AF9FF10ADD18A04F73312DC3_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsInvestments_DC839A4DAD9F59E6910C806E6004038A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other investment-related items, net</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsInvestments_757552D9AF9FF10ADD18A04F73312DC3_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsInvestments_DC839A4DAD9F59E6910C806E6004038A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsInvestments" xlink:label="loc_us-gaap_DeferredTaxAssetsInvestments_DC839A4DAD9F59E6910C806E6004038A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsInvestments_DC839A4DAD9F59E6910C806E6004038A" xlink:to="lab_us-gaap_DeferredTaxAssetsInvestments_DC839A4DAD9F59E6910C806E6004038A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_5E0CF23B9A5A32A6DA4EA04F733119CB_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2949147F3FEE5DE9A2329E4AC32F21CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net operating loss</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_5E0CF23B9A5A32A6DA4EA04F733119CB_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2949147F3FEE5DE9A2329E4AC32F21CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Operating Loss Carryforwards</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2949147F3FEE5DE9A2329E4AC32F21CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2949147F3FEE5DE9A2329E4AC32F21CB" xlink:to="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2949147F3FEE5DE9A2329E4AC32F21CB" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsOther_14DE1330811F0AC759BBA04F73319900_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOther_2A6E84749ABD5C1192425A1BFF01DD53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsOther_14DE1330811F0AC759BBA04F73319900_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOther_2A6E84749ABD5C1192425A1BFF01DD53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_2A6E84749ABD5C1192425A1BFF01DD53" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsOther_2A6E84749ABD5C1192425A1BFF01DD53" xlink:to="lab_us-gaap_DeferredTaxAssetsOther_2A6E84749ABD5C1192425A1BFF01DD53" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsGross_9966D0CD0C37D96BBBBCA04F733161FA_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsGross_9A19C7EE0B48595AB1214DCBADFEC99C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total deferred tax assets</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsGross_9966D0CD0C37D96BBBBCA04F733161FA_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsGross_9A19C7EE0B48595AB1214DCBADFEC99C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_9A19C7EE0B48595AB1214DCBADFEC99C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_9A19C7EE0B48595AB1214DCBADFEC99C" xlink:to="lab_us-gaap_DeferredTaxAssetsGross_9A19C7EE0B48595AB1214DCBADFEC99C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost_6B19A1CC26468E42C27BA04F7331D3E7_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost_28E54761675959908488D0B9AC9F1FD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred policy acquisition costs</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost_6B19A1CC26468E42C27BA04F7331D3E7_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost_28E54761675959908488D0B9AC9F1FD4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost_28E54761675959908488D0B9AC9F1FD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost_28E54761675959908488D0B9AC9F1FD4" xlink:to="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost_28E54761675959908488D0B9AC9F1FD4" xlink:type="arc" />
    <link:label id="lab_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_0BF67D5037E5AFCCBC8BA04F7331AA37_terseLabel_en-US" xlink:label="lab_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_9968D139C8265CDA9C9D242FA66A2774" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized gains on investment securities</link:label>
    <link:label id="lab_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_0BF67D5037E5AFCCBC8BA04F7331AA37_label_en-US" xlink:label="lab_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_9968D139C8265CDA9C9D242FA66A2774" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities Investment Securities Unrealized Gain</link:label>
    <link:label id="lab_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_0BF67D5037E5AFCCBC8BA04F7331AA37_documentation_en-US" xlink:label="lab_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_9968D139C8265CDA9C9D242FA66A2774" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount as of the balance sheet date of the estimated future tax effects attributable to unrealized gains for investment securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain" xlink:label="loc_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_9968D139C8265CDA9C9D242FA66A2774" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_9968D139C8265CDA9C9D242FA66A2774" xlink:to="lab_sigi_DeferredTaxLiabilitiesInvestmentSecuritiesUnrealizedGain_9968D139C8265CDA9C9D242FA66A2774" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesOther_F78CE2E207DCA10B4E5EA04F73312ECC_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesOther_74EB9C408BBC5429B833F79411D70352" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other investment-related items, net</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesOther_F78CE2E207DCA10B4E5EA04F73312ECC_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesOther_74EB9C408BBC5429B833F79411D70352" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_74EB9C408BBC5429B833F79411D70352" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesOther_74EB9C408BBC5429B833F79411D70352" xlink:to="lab_us-gaap_DeferredTaxLiabilitiesOther_74EB9C408BBC5429B833F79411D70352" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_142FF9ABCE86C3713FAFA04F73317B2B_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_FE9DC7E0FFBB5480B7B68EBCBE0982AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accelerated depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_142FF9ABCE86C3713FAFA04F73317B2B_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_FE9DC7E0FFBB5480B7B68EBCBE0982AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Property, Plant and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_FE9DC7E0FFBB5480B7B68EBCBE0982AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_FE9DC7E0FFBB5480B7B68EBCBE0982AD" xlink:to="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_FE9DC7E0FFBB5480B7B68EBCBE0982AD" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilities_56E576E562C720D09F0AA04F73310726_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilities_041831AF37E0506791AC3F29163F36DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total deferred tax liabilities</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilities_56E576E562C720D09F0AA04F73310726_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilities_041831AF37E0506791AC3F29163F36DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_041831AF37E0506791AC3F29163F36DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilities_041831AF37E0506791AC3F29163F36DA" xlink:to="lab_us-gaap_DeferredTaxLiabilities_041831AF37E0506791AC3F29163F36DA" xlink:type="arc" />
    <link:label id="lab_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_65864C6668F18BD67E4DA04F73329A15_terseLabel_en-US" xlink:label="lab_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_D23A981639C45B589295AEEEBCEEB98C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax benefits related to compensation expense deductions for share-based compensation awards</link:label>
    <link:label id="lab_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_65864C6668F18BD67E4DA04F73329A15_label_en-US" xlink:label="lab_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_D23A981639C45B589295AEEEBCEEB98C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax Benefits Related To Compensation Expense Deductions For Share Based Compensation Awards</link:label>
    <link:label id="lab_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_65864C6668F18BD67E4DA04F73329A15_documentation_en-US" xlink:label="lab_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_D23A981639C45B589295AEEEBCEEB98C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax benefits that arise when compensation cost (from non-qualified share-based compensation) recognized on the entity's tax return exceeds compensation cost from equity-based compensation recognized in financial statements.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards" xlink:label="loc_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_D23A981639C45B589295AEEEBCEEB98C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_D23A981639C45B589295AEEEBCEEB98C" xlink:to="lab_sigi_TaxBenefitsRelatedToCompensationExpenseDeductionsForShareBasedCompensationAwards_D23A981639C45B589295AEEEBCEEB98C" xlink:type="arc" />
    <link:label id="lab_sigi_DividendEquivalentUnitsMember_A24BB8BFED00C9D9D38090CEAC365C27_terseLabel_en-US" xlink:label="lab_sigi_DividendEquivalentUnitsMember_E43F288ED08E5465894C7B71598A4D21" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend Equivalent Units [Member]</link:label>
    <link:label id="lab_sigi_DividendEquivalentUnitsMember_A24BB8BFED00C9D9D38090CEAC365C27_label_en-US" xlink:label="lab_sigi_DividendEquivalentUnitsMember_E43F288ED08E5465894C7B71598A4D21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Equivalent Units [Member]</link:label>
    <link:label id="lab_sigi_DividendEquivalentUnitsMember_A24BB8BFED00C9D9D38090CEAC365C27_documentation_en-US" xlink:label="lab_sigi_DividendEquivalentUnitsMember_E43F288ED08E5465894C7B71598A4D21" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dividend Equivalent Units represent equivalent units earned on restricted stock units that are reinvested in the Parent's common stock at fair value on each dividend payment date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DividendEquivalentUnitsMember" xlink:label="loc_sigi_DividendEquivalentUnitsMember_E43F288ED08E5465894C7B71598A4D21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DividendEquivalentUnitsMember_E43F288ED08E5465894C7B71598A4D21" xlink:to="lab_sigi_DividendEquivalentUnitsMember_E43F288ED08E5465894C7B71598A4D21" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_7B50AC64B6F41114A46390CEAC36B099_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_051116D8C73D513A957BDE4FEB14DBEB" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Unvested RSU awards at December 31, 2016</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_7B50AC64B6F41114A46390CEAC36B099_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_051116D8C73D513A957BDE4FEB14DBEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_051116D8C73D513A957BDE4FEB14DBEB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_051116D8C73D513A957BDE4FEB14DBEB" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_051116D8C73D513A957BDE4FEB14DBEB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_FFE446BFE9E9C42E450790CEAC371C7E_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_063ADBEE97E95247A4EB58934706D731" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted in 2017, number of shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_FFE446BFE9E9C42E450790CEAC371C7E_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_063ADBEE97E95247A4EB58934706D731" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_063ADBEE97E95247A4EB58934706D731" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_063ADBEE97E95247A4EB58934706D731" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_063ADBEE97E95247A4EB58934706D731" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_369AEA610D5D562D695290CEAC3701E6_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_B1994D8413EB513FB22A05FC754415E5" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Vested in 2017, number of shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_369AEA610D5D562D695290CEAC3701E6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_B1994D8413EB513FB22A05FC754415E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_B1994D8413EB513FB22A05FC754415E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_B1994D8413EB513FB22A05FC754415E5" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_B1994D8413EB513FB22A05FC754415E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_029E5F1A99FD4D0317A690CEAC3758CF_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_B6A638B9413159C7BE69F01780F66343" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Forfeited in 2017, number of shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_029E5F1A99FD4D0317A690CEAC3758CF_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_B6A638B9413159C7BE69F01780F66343" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_B6A638B9413159C7BE69F01780F66343" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_B6A638B9413159C7BE69F01780F66343" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_B6A638B9413159C7BE69F01780F66343" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_6CB77E2908FD2E12253490CEAC37E9C9_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_939A02D0DC5E56DC9CEBC521F03471C9" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Unvested RSU awards at Decemeber 31, 2017, number of shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_939A02D0DC5E56DC9CEBC521F03471C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_939A02D0DC5E56DC9CEBC521F03471C9" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_939A02D0DC5E56DC9CEBC521F03471C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_F3FBF4F92B07CF080FD790CEAC375F3C_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_017891339B435DC3AB7BAC61D232CCE0" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Unvested RSU awards at December 31, 2016, weighted average grant date fair value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_F3FBF4F92B07CF080FD790CEAC375F3C_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_017891339B435DC3AB7BAC61D232CCE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_017891339B435DC3AB7BAC61D232CCE0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_017891339B435DC3AB7BAC61D232CCE0" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_017891339B435DC3AB7BAC61D232CCE0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1F8871A376487CA8DFD390CEAC3785C1_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1505068747F9576A9AF9BC0A0BB7C0E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted in 2017, weighted average grant date fair value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1505068747F9576A9AF9BC0A0BB7C0E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1505068747F9576A9AF9BC0A0BB7C0E5" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_1505068747F9576A9AF9BC0A0BB7C0E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_8828CBFEFABDD560DBE290CEAC37E613_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9AE01B2DFBBF5C01AB0099378DC3BDBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vested in 2017, weighted average grant date value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_8828CBFEFABDD560DBE290CEAC37E613_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9AE01B2DFBBF5C01AB0099378DC3BDBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9AE01B2DFBBF5C01AB0099378DC3BDBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9AE01B2DFBBF5C01AB0099378DC3BDBB" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9AE01B2DFBBF5C01AB0099378DC3BDBB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_6352A18DE15BD0C0BEC790CEAC37F4C0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_9222EBE35000583BA1FC38B8ACD32041" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forfeited in 2017, weighted average grant date fair value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_6352A18DE15BD0C0BEC790CEAC37F4C0_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_9222EBE35000583BA1FC38B8ACD32041" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_9222EBE35000583BA1FC38B8ACD32041" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_9222EBE35000583BA1FC38B8ACD32041" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_9222EBE35000583BA1FC38B8ACD32041" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_4E62864EC6F45E1762DC90CEAC37F282_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_438D9768CF9551C3AAC47A07B38082B8" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Unvested RSU awards at December 31, 2017, weighted average grant date fair value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_438D9768CF9551C3AAC47A07B38082B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_438D9768CF9551C3AAC47A07B38082B8" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_438D9768CF9551C3AAC47A07B38082B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_837F0965AA127AF7665090CEAC37ADCD_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D4DC4D7BB1465C8492D23426EA64DF1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total unrecognized compensation cost related to unvested RSU awards</link:label>
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_837F0965AA127AF7665090CEAC37ADCD_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D4DC4D7BB1465C8492D23426EA64DF1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D4DC4D7BB1465C8492D23426EA64DF1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D4DC4D7BB1465C8492D23426EA64DF1D" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D4DC4D7BB1465C8492D23426EA64DF1D" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_DAE9A720D7443289940E90CEAC379D9C_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_12EE96E601F1586996FAA1BD86965AAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average remaining expense life</link:label>
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_DAE9A720D7443289940E90CEAC379D9C_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_12EE96E601F1586996FAA1BD86965AAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_12EE96E601F1586996FAA1BD86965AAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_12EE96E601F1586996FAA1BD86965AAC" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_12EE96E601F1586996FAA1BD86965AAC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_FE571F4A75B4873DF88C90CEAC38858F_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D4062D0FA9D250819F35602788BC177C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total intrinsic value of shares vested</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D4062D0FA9D250819F35602788BC177C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D4062D0FA9D250819F35602788BC177C" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D4062D0FA9D250819F35602788BC177C" xlink:type="arc" />
    <link:label id="lab_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_5C8987826FBCC4B44D1F915BE5738E45_terseLabel_en-US" xlink:label="lab_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_11C0E800E2C756F99DEBE5FC1C0BBAEE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Based Compensation Liability Awards Amount Of Liability</link:label>
    <link:label id="lab_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_5C8987826FBCC4B44D1F915BE5738E45_label_en-US" xlink:label="lab_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_11C0E800E2C756F99DEBE5FC1C0BBAEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Liability Awards Amount Of Liability</link:label>
    <link:label id="lab_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_5C8987826FBCC4B44D1F915BE5738E45_documentation_en-US" xlink:label="lab_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_11C0E800E2C756F99DEBE5FC1C0BBAEE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The liability recorded in connection with our Cash Incentive Plan.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability" xlink:label="loc_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_11C0E800E2C756F99DEBE5FC1C0BBAEE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_11C0E800E2C756F99DEBE5FC1C0BBAEE" xlink:to="lab_sigi_ShareBasedCompensationLiabilityAwardsAmountOfLiability_11C0E800E2C756F99DEBE5FC1C0BBAEE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid_E7B9B2B4DC6EA41CE99790CEAC38A75E_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid_728C6A1BB44153BCB00C5877874E8878" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash incentive unit payments made</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid_E7B9B2B4DC6EA41CE99790CEAC38A75E_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid_728C6A1BB44153BCB00C5877874E8878" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid_728C6A1BB44153BCB00C5877874E8878" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid_728C6A1BB44153BCB00C5877874E8878" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsShareBasedLiabilitiesPaid_728C6A1BB44153BCB00C5877874E8878" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_21CEAF4F2A8AB0BD115C101EE6E2A32A_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_F8E9F5FAFDB4579BBAB4DFFF014F99E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Comprehensive Income</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_21CEAF4F2A8AB0BD115C101EE6E2A32A_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_F8E9F5FAFDB4579BBAB4DFFF014F99E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Note Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock_F8E9F5FAFDB4579BBAB4DFFF014F99E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock_F8E9F5FAFDB4579BBAB4DFFF014F99E1" xlink:to="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_F8E9F5FAFDB4579BBAB4DFFF014F99E1" xlink:type="arc" />
    <link:label id="lab_sigi_StatutoryDataTable_C333F7DC0040925FE3DB101EE6DAC937_terseLabel_en-US" xlink:label="lab_sigi_StatutoryDataTable_1636A8208592533EA7AD8B7948FBB347" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory Data [Table]</link:label>
    <link:label id="lab_sigi_StatutoryDataTable_C333F7DC0040925FE3DB101EE6DAC937_label_en-US" xlink:label="lab_sigi_StatutoryDataTable_1636A8208592533EA7AD8B7948FBB347" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Data [Table]</link:label>
    <link:label id="lab_sigi_StatutoryDataTable_C333F7DC0040925FE3DB101EE6DAC937_documentation_en-US" xlink:label="lab_sigi_StatutoryDataTable_1636A8208592533EA7AD8B7948FBB347" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of insurance subsidiaries' statutory surplus, unassigned surplus and statutory net income table.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StatutoryDataTable" xlink:label="loc_sigi_StatutoryDataTable_1636A8208592533EA7AD8B7948FBB347" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StatutoryDataTable_1636A8208592533EA7AD8B7948FBB347" xlink:to="lab_sigi_StatutoryDataTable_1636A8208592533EA7AD8B7948FBB347" xlink:type="arc" />
    <link:label id="lab_sigi_StatutoryDataAxis_2CA340FF9D10A8EA67DC101EE6DA0EE6_terseLabel_en-US" xlink:label="lab_sigi_StatutoryDataAxis_3F60EC3B3AC65D6C9B405473C35357A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory Data [Axis]</link:label>
    <link:label id="lab_sigi_StatutoryDataAxis_2CA340FF9D10A8EA67DC101EE6DA0EE6_label_en-US" xlink:label="lab_sigi_StatutoryDataAxis_3F60EC3B3AC65D6C9B405473C35357A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Data [Axis]</link:label>
    <link:label id="lab_sigi_StatutoryDataAxis_2CA340FF9D10A8EA67DC101EE6DA0EE6_documentation_en-US" xlink:label="lab_sigi_StatutoryDataAxis_3F60EC3B3AC65D6C9B405473C35357A2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of insurance subsidiaries' statutory surplus, unassigned surplus and statutory net income axis.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StatutoryDataAxis" xlink:label="loc_sigi_StatutoryDataAxis_3F60EC3B3AC65D6C9B405473C35357A2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StatutoryDataAxis_3F60EC3B3AC65D6C9B405473C35357A2" xlink:to="lab_sigi_StatutoryDataAxis_3F60EC3B3AC65D6C9B405473C35357A2" xlink:type="arc" />
    <link:label id="lab_sigi_StatutoryDataDomain_5EC0E4C18DADF8521393101EE6DA4AB7_terseLabel_en-US" xlink:label="lab_sigi_StatutoryDataDomain_6B8A30592465577EBC6E0529F18E9328" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory Data [Domain]</link:label>
    <link:label id="lab_sigi_StatutoryDataDomain_5EC0E4C18DADF8521393101EE6DA4AB7_label_en-US" xlink:label="lab_sigi_StatutoryDataDomain_6B8A30592465577EBC6E0529F18E9328" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Data [Domain]</link:label>
    <link:label id="lab_sigi_StatutoryDataDomain_5EC0E4C18DADF8521393101EE6DA4AB7_documentation_en-US" xlink:label="lab_sigi_StatutoryDataDomain_6B8A30592465577EBC6E0529F18E9328" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of insurance subsidiaries' statutory surplus, unassigned surplus and statutory net income domain.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StatutoryDataDomain" xlink:label="loc_sigi_StatutoryDataDomain_6B8A30592465577EBC6E0529F18E9328" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StatutoryDataDomain_6B8A30592465577EBC6E0529F18E9328" xlink:to="lab_sigi_StatutoryDataDomain_6B8A30592465577EBC6E0529F18E9328" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_843ED962260153D798B1101EE6DADD81_terseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_FA8F9CE50D665042A86F1189A53AE441" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurace Company of America (SICA) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_843ED962260153D798B1101EE6DADD81_label_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_FA8F9CE50D665042A86F1189A53AE441" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of America [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_843ED962260153D798B1101EE6DADD81_documentation_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_FA8F9CE50D665042A86F1189A53AE441" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Insurance Company of America, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfAmericaMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfAmericaMember_FA8F9CE50D665042A86F1189A53AE441" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfAmericaMember_FA8F9CE50D665042A86F1189A53AE441" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_FA8F9CE50D665042A86F1189A53AE441" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveWayInsuranceCompanyMember_7EAB209EAC0E7C922DEA101EE6DAC19C_terseLabel_en-US" xlink:label="lab_sigi_SelectiveWayInsuranceCompanyMember_D3EAC7F59838500FB7809277529007A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Way Insurance Company (SWIC) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveWayInsuranceCompanyMember_7EAB209EAC0E7C922DEA101EE6DAC19C_label_en-US" xlink:label="lab_sigi_SelectiveWayInsuranceCompanyMember_D3EAC7F59838500FB7809277529007A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Way Insurance Company [Member]</link:label>
    <link:label id="lab_sigi_SelectiveWayInsuranceCompanyMember_7EAB209EAC0E7C922DEA101EE6DAC19C_documentation_en-US" xlink:label="lab_sigi_SelectiveWayInsuranceCompanyMember_D3EAC7F59838500FB7809277529007A8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Way Insurance Company, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveWayInsuranceCompanyMember" xlink:label="loc_sigi_SelectiveWayInsuranceCompanyMember_D3EAC7F59838500FB7809277529007A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveWayInsuranceCompanyMember_D3EAC7F59838500FB7809277529007A8" xlink:to="lab_sigi_SelectiveWayInsuranceCompanyMember_D3EAC7F59838500FB7809277529007A8" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_F5BCD064A9120DB08E83101EE6DA3BAE_terseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_EA5DF86E3D065FF89579FC881FCEF1E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of South Carolina (SICSC) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_F5BCD064A9120DB08E83101EE6DA3BAE_label_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_EA5DF86E3D065FF89579FC881FCEF1E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of South Carolina [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_F5BCD064A9120DB08E83101EE6DA3BAE_documentation_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_EA5DF86E3D065FF89579FC881FCEF1E7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Insurance Company of South Carolina, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_EA5DF86E3D065FF89579FC881FCEF1E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_EA5DF86E3D065FF89579FC881FCEF1E7" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_EA5DF86E3D065FF89579FC881FCEF1E7" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_2568BAEA89834B860AE1101EE6DA7812_terseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_48340CE4252B5FCCA513F7FBB6482A92" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of the Southeast (SICSE) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_2568BAEA89834B860AE1101EE6DA7812_label_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_48340CE4252B5FCCA513F7FBB6482A92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of the Southeast [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_2568BAEA89834B860AE1101EE6DA7812_documentation_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_48340CE4252B5FCCA513F7FBB6482A92" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Insurance Company of the Southeast, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfSoutheastMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfSoutheastMember_48340CE4252B5FCCA513F7FBB6482A92" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfSoutheastMember_48340CE4252B5FCCA513F7FBB6482A92" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_48340CE4252B5FCCA513F7FBB6482A92" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_5AC703EC250ACF0B5E11101EE6DA2E18_terseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_80541C6DFB6E5EA2A317A944B0F5F80B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of New York (SICNY) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_5AC703EC250ACF0B5E11101EE6DA2E18_label_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_80541C6DFB6E5EA2A317A944B0F5F80B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of New York [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_5AC703EC250ACF0B5E11101EE6DA2E18_documentation_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_80541C6DFB6E5EA2A317A944B0F5F80B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Insurance Company of New York, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfNewYorkMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfNewYorkMember_80541C6DFB6E5EA2A317A944B0F5F80B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfNewYorkMember_80541C6DFB6E5EA2A317A944B0F5F80B" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_80541C6DFB6E5EA2A317A944B0F5F80B" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_26C1BCAC077F81ABA6ED101EE6DA091C_terseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_059C9B769DBF5B6C9CF9C2119A9D9CA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of New England (SICNE) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_26C1BCAC077F81ABA6ED101EE6DA091C_label_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_059C9B769DBF5B6C9CF9C2119A9D9CA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of New England [Member]</link:label>
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_26C1BCAC077F81ABA6ED101EE6DA091C_documentation_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_059C9B769DBF5B6C9CF9C2119A9D9CA4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Insurance Company of New England, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfNewEnglandMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_059C9B769DBF5B6C9CF9C2119A9D9CA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_059C9B769DBF5B6C9CF9C2119A9D9CA4" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_059C9B769DBF5B6C9CF9C2119A9D9CA4" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_D79106B914370A4C8135101EE6DA723C_terseLabel_en-US" xlink:label="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_C01BDC525AB65233A041A09621BB653E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Auto Insurance Company of New Jersey (SAICNJ) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_D79106B914370A4C8135101EE6DA723C_label_en-US" xlink:label="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_C01BDC525AB65233A041A09621BB653E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Auto Insurance Company of New Jersey [Member]</link:label>
    <link:label id="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_D79106B914370A4C8135101EE6DA723C_documentation_en-US" xlink:label="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_C01BDC525AB65233A041A09621BB653E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Auto Insurance Company of New Jersey, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember" xlink:label="loc_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_C01BDC525AB65233A041A09621BB653E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_C01BDC525AB65233A041A09621BB653E" xlink:to="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_C01BDC525AB65233A041A09621BB653E" xlink:type="arc" />
    <link:label id="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_3B20A2A665FA5CF71ABF101EE6DA8117_terseLabel_en-US" xlink:label="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_904009A599E15AA8A69152CBD1F9D1D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mesa Underwriting Specialty Insurance Company (MUSIC) [Member]</link:label>
    <link:label id="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_3B20A2A665FA5CF71ABF101EE6DA8117_label_en-US" xlink:label="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_904009A599E15AA8A69152CBD1F9D1D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mesa Underwriting Specialty Insurance Company [Member]</link:label>
    <link:label id="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_3B20A2A665FA5CF71ABF101EE6DA8117_documentation_en-US" xlink:label="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_904009A599E15AA8A69152CBD1F9D1D2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Mesa Underwriting Specialty Insurance Company, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember" xlink:label="loc_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_904009A599E15AA8A69152CBD1F9D1D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_904009A599E15AA8A69152CBD1F9D1D2" xlink:to="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_904009A599E15AA8A69152CBD1F9D1D2" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_C31C71D75623EA720642101EE6DAD405_terseLabel_en-US" xlink:label="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_459E5FF674595E7CBFED42BB5917E5E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Casualty Insurance Company (SCIC) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_C31C71D75623EA720642101EE6DAD405_label_en-US" xlink:label="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_459E5FF674595E7CBFED42BB5917E5E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Casualty Insurance Company [Member]</link:label>
    <link:label id="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_C31C71D75623EA720642101EE6DAD405_documentation_en-US" xlink:label="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_459E5FF674595E7CBFED42BB5917E5E6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Casualty Insurance Company, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveCasualtyInsuranceCompanyMember" xlink:label="loc_sigi_SelectiveCasualtyInsuranceCompanyMember_459E5FF674595E7CBFED42BB5917E5E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveCasualtyInsuranceCompanyMember_459E5FF674595E7CBFED42BB5917E5E6" xlink:to="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_459E5FF674595E7CBFED42BB5917E5E6" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_72A0782307AB84C21996101EE6DB19C3_terseLabel_en-US" xlink:label="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_38DCADEEFE1355C8B8515CBFDA9FBA2B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selective Fire and Casualty Insurance Company (SFCIC) [Member]</link:label>
    <link:label id="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_72A0782307AB84C21996101EE6DB19C3_label_en-US" xlink:label="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_38DCADEEFE1355C8B8515CBFDA9FBA2B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selective Fire and Casualty Insurance Company [Member]</link:label>
    <link:label id="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_72A0782307AB84C21996101EE6DB19C3_documentation_en-US" xlink:label="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_38DCADEEFE1355C8B8515CBFDA9FBA2B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents Selective Fire and Casualty Insurance Company, a subsidiary of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveFireAndCasualtyInsuranceCompanyMember" xlink:label="loc_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_38DCADEEFE1355C8B8515CBFDA9FBA2B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_38DCADEEFE1355C8B8515CBFDA9FBA2B" xlink:to="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_38DCADEEFE1355C8B8515CBFDA9FBA2B" xlink:type="arc" />
    <link:label id="lab_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_A600AD024A4FC5B33D9C101EE6DBBD9B_terseLabel_en-US" xlink:label="lab_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_C565231F30FD521DAC61E607031D1E7C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory unassigned surplus</link:label>
    <link:label id="lab_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_A600AD024A4FC5B33D9C101EE6DBBD9B_label_en-US" xlink:label="lab_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_C565231F30FD521DAC61E607031D1E7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Accounting Practices Statutory Unassigned Surplus</link:label>
    <link:label id="lab_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_A600AD024A4FC5B33D9C101EE6DBBD9B_documentation_en-US" xlink:label="lab_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_C565231F30FD521DAC61E607031D1E7C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of statutory unassigned surplus as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus" xlink:label="loc_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_C565231F30FD521DAC61E607031D1E7C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_C565231F30FD521DAC61E607031D1E7C" xlink:to="lab_sigi_StatutoryAccountingPracticesStatutoryUnassignedSurplus_C565231F30FD521DAC61E607031D1E7C" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_6485028D0BC2E9C7E0AC101EE6DBE349_terseLabel_en-US" xlink:label="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_BC25482F20C15D29A5C3178D168A33E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory surplus</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_BC25482F20C15D29A5C3178D168A33E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_BC25482F20C15D29A5C3178D168A33E9" xlink:to="lab_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_BC25482F20C15D29A5C3178D168A33E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_AAEC16363EB0F38697D5101EE6DBD1C4_terseLabel_en-US" xlink:label="lab_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_E7D96C5863D157ADBAC00E381A758839" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory net income</link:label>
    <link:label id="lab_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_AAEC16363EB0F38697D5101EE6DBD1C4_label_en-US" xlink:label="lab_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_E7D96C5863D157ADBAC00E381A758839" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Accounting Practices, Statutory Net Income Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_E7D96C5863D157ADBAC00E381A758839" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_E7D96C5863D157ADBAC00E381A758839" xlink:to="lab_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_E7D96C5863D157ADBAC00E381A758839" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_10B8F8B24CC736F37A5B101EE514C117_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_A7A1AF4C388254E882C02DA029998ED4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Plan Terms In Effect And Revisions Of Retirement Savings Plan</link:label>
    <link:label id="lab_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_10B8F8B24CC736F37A5B101EE514C117_label_en-US" xlink:label="lab_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_A7A1AF4C388254E882C02DA029998ED4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Plan Terms In Effect And Revisions Of Retirement Savings Plan [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_10B8F8B24CC736F37A5B101EE514C117_documentation_en-US" xlink:label="lab_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_A7A1AF4C388254E882C02DA029998ED4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure regarding the terms and revisions of the Retirement Savings Plan</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock" xlink:label="loc_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_A7A1AF4C388254E882C02DA029998ED4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_A7A1AF4C388254E882C02DA029998ED4" xlink:to="lab_sigi_ScheduleOfPlanTermsInEffectAndRevisionsOfRetirementSavingsPlanTableTextBlock_A7A1AF4C388254E882C02DA029998ED4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_A57C085125F825DD7B8A101EE5145AB1_terseLabel_en-US" xlink:label="lab_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_CE3D5355CCF45AE3B89587F7BA867507" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Funded Status Of Retirement Income Plan And Retirement Life Plan</link:label>
    <link:label id="lab_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_A57C085125F825DD7B8A101EE5145AB1_label_en-US" xlink:label="lab_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_CE3D5355CCF45AE3B89587F7BA867507" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock" xlink:label="loc_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_CE3D5355CCF45AE3B89587F7BA867507" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_CE3D5355CCF45AE3B89587F7BA867507" xlink:to="lab_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_CE3D5355CCF45AE3B89587F7BA867507" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_193651FFF58D3D3076D8101EE514DE59_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_90F33111D4465C8EA35781D430B6A68D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Amounts Recognized in Consolidated Balance Sheet</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_193651FFF58D3D3076D8101EE514DE59_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_90F33111D4465C8EA35781D430B6A68D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Amounts Recognized in Balance Sheet [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_90F33111D4465C8EA35781D430B6A68D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_90F33111D4465C8EA35781D430B6A68D" xlink:to="lab_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_90F33111D4465C8EA35781D430B6A68D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock_9FD695C8B410F4613F6A101EE5147A0C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock_1477CD581F1050919924A6C57D85509E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Amounts recognized in Accumulated Other than Comprehensive Income</link:label>
    <link:label id="lab_us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock_9FD695C8B410F4613F6A101EE5147A0C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock_1477CD581F1050919924A6C57D85509E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock_1477CD581F1050919924A6C57D85509E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock_1477CD581F1050919924A6C57D85509E" xlink:to="lab_us-gaap_ScheduleOfNetPeriodicBenefitCostNotYetRecognizedTableTextBlock_1477CD581F1050919924A6C57D85509E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_3B2075EDF034509AEE3B101EE5140583_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_DE2EF4285B8F54548B6B6FB93800FC02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Other Information as of December 31</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_3B2075EDF034509AEE3B101EE5140583_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_DE2EF4285B8F54548B6B6FB93800FC02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated and Projected Benefit Obligations [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_DE2EF4285B8F54548B6B6FB93800FC02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_DE2EF4285B8F54548B6B6FB93800FC02" xlink:to="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_DE2EF4285B8F54548B6B6FB93800FC02" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_C79A2AE82A6B1D3B98D3101EE514A071_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_E9DD7A7728D458E09DB580E9BF07FCC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Income</link:label>
    <link:label id="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_C79A2AE82A6B1D3B98D3101EE514A071_label_en-US" xlink:label="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_E9DD7A7728D458E09DB580E9BF07FCC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Net Benefit Costs [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfNetBenefitCostsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_E9DD7A7728D458E09DB580E9BF07FCC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_E9DD7A7728D458E09DB580E9BF07FCC8" xlink:to="lab_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_E9DD7A7728D458E09DB580E9BF07FCC8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_626D73BDDD7E872F1629101EE515E36D_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_EC7203A0CB6E5A2C963751ACD6F5E211" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Weighted- Average Expense and Liability Assumptions</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_626D73BDDD7E872F1629101EE515E36D_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_EC7203A0CB6E5A2C963751ACD6F5E211" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Assumptions Used [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAssumptionsUsedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_EC7203A0CB6E5A2C963751ACD6F5E211" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_EC7203A0CB6E5A2C963751ACD6F5E211" xlink:to="lab_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_EC7203A0CB6E5A2C963751ACD6F5E211" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_28B2E25EC82A365D8EE5101EE51574D6_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_57C1D6C1421C5760BEC590E7BC1E41EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Allocation of Plan Assets</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_28B2E25EC82A365D8EE5101EE51574D6_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_57C1D6C1421C5760BEC590E7BC1E41EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Allocation of Plan Assets [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_57C1D6C1421C5760BEC590E7BC1E41EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_57C1D6C1421C5760BEC590E7BC1E41EA" xlink:to="lab_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_57C1D6C1421C5760BEC590E7BC1E41EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_839E5F5B92E1A1F24020101EE5153531_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_B010A660E9525AE7AE6247C7C6A0855A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Quantitative Disclosures of our Financial Assets that were Measured at Fair Value</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_839E5F5B92E1A1F24020101EE5153531_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_B010A660E9525AE7AE6247C7C6A0855A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_B010A660E9525AE7AE6247C7C6A0855A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_B010A660E9525AE7AE6247C7C6A0855A" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_B010A660E9525AE7AE6247C7C6A0855A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_F582232AEC4C0CB0FA6F101EE51580B0_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_CD78E5C8C30D547A99BEC9B8F7532518" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Expected Benefit Payments</link:label>
    <link:label id="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_F582232AEC4C0CB0FA6F101EE51580B0_label_en-US" xlink:label="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_CD78E5C8C30D547A99BEC9B8F7532518" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Expected Benefit Payments [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_CD78E5C8C30D547A99BEC9B8F7532518" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_CD78E5C8C30D547A99BEC9B8F7532518" xlink:to="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_CD78E5C8C30D547A99BEC9B8F7532518" xlink:type="arc" />
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock_6FD3494E788ACB62FC38101EE6363F25_terseLabel_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock_CF75FBDAFB1553A6B7FD5CB53B5D364F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule I - Summary of Investments- Other than Investments in Related Parties</link:label>
    <link:label id="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock_6FD3494E788ACB62FC38101EE6363F25_label_en-US" xlink:label="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock_CF75FBDAFB1553A6B7FD5CB53B5D364F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Investments, Other than Investments in Related Parties [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock" xlink:label="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock_CF75FBDAFB1553A6B7FD5CB53B5D364F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock_CF75FBDAFB1553A6B7FD5CB53B5D364F" xlink:to="lab_us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesTextBlock_CF75FBDAFB1553A6B7FD5CB53B5D364F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_8C97299B432880D7693E101EE3DCFECD_label_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_F1E22A5298C05DACB119F433F3D3A211" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Compensation Related Costs, Share-based Payments [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_F1E22A5298C05DACB119F433F3D3A211" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_F1E22A5298C05DACB119F433F3D3A211" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_F1E22A5298C05DACB119F433F3D3A211" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsWrittenNetConsolidatedAbstract_E8723F1CEE8A126055D8A04F4AF77D52_terseLabel_en-US" xlink:label="lab_us-gaap_PremiumsWrittenNetConsolidatedAbstract_F200D1F198EB5CF8B8E88B0156B3CDD2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premiums Written:</link:label>
    <link:label id="lab_us-gaap_PremiumsWrittenNetConsolidatedAbstract_E8723F1CEE8A126055D8A04F4AF77D52_label_en-US" xlink:label="lab_us-gaap_PremiumsWrittenNetConsolidatedAbstract_F200D1F198EB5CF8B8E88B0156B3CDD2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums Written, Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsWrittenNetConsolidatedAbstract" xlink:label="loc_us-gaap_PremiumsWrittenNetConsolidatedAbstract_F200D1F198EB5CF8B8E88B0156B3CDD2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsWrittenNetConsolidatedAbstract_F200D1F198EB5CF8B8E88B0156B3CDD2" xlink:to="lab_us-gaap_PremiumsWrittenNetConsolidatedAbstract_F200D1F198EB5CF8B8E88B0156B3CDD2" xlink:type="arc" />
    <link:label id="lab_us-gaap_DirectPremiumsWritten_FBA957F261600B28CC48A04F4AF77FCE_terseLabel_en-US" xlink:label="lab_us-gaap_DirectPremiumsWritten_FAE8C20BF14F567D90BDA1F2D8532E7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Direct</link:label>
    <link:label id="lab_us-gaap_DirectPremiumsWritten_FBA957F261600B28CC48A04F4AF77FCE_label_en-US" xlink:label="lab_us-gaap_DirectPremiumsWritten_FAE8C20BF14F567D90BDA1F2D8532E7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Direct Premiums Written</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DirectPremiumsWritten" xlink:label="loc_us-gaap_DirectPremiumsWritten_FAE8C20BF14F567D90BDA1F2D8532E7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DirectPremiumsWritten_FAE8C20BF14F567D90BDA1F2D8532E7D" xlink:to="lab_us-gaap_DirectPremiumsWritten_FAE8C20BF14F567D90BDA1F2D8532E7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssumedPremiumsWritten_66F200A83EB702037CFAA04F4AF79379_terseLabel_en-US" xlink:label="lab_us-gaap_AssumedPremiumsWritten_1F9F801343AA51FE850C7BA150D988DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assumed</link:label>
    <link:label id="lab_us-gaap_AssumedPremiumsWritten_66F200A83EB702037CFAA04F4AF79379_label_en-US" xlink:label="lab_us-gaap_AssumedPremiumsWritten_1F9F801343AA51FE850C7BA150D988DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assumed Premiums Written</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssumedPremiumsWritten" xlink:label="loc_us-gaap_AssumedPremiumsWritten_1F9F801343AA51FE850C7BA150D988DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssumedPremiumsWritten_1F9F801343AA51FE850C7BA150D988DC" xlink:to="lab_us-gaap_AssumedPremiumsWritten_1F9F801343AA51FE850C7BA150D988DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsWrittenNet_DB3899D9372B82F9D628A04F4AF7DB73_totalLabel_en-US" xlink:label="lab_us-gaap_PremiumsWrittenNet_3FAC4289D6725B7ABE05D81727DD13FF" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net</link:label>
    <link:label id="lab_us-gaap_PremiumsWrittenNet_DB3899D9372B82F9D628A04F4AF7DB73_label_en-US" xlink:label="lab_us-gaap_PremiumsWrittenNet_3FAC4289D6725B7ABE05D81727DD13FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums Written, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsWrittenNet" xlink:label="loc_us-gaap_PremiumsWrittenNet_3FAC4289D6725B7ABE05D81727DD13FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsWrittenNet_3FAC4289D6725B7ABE05D81727DD13FF" xlink:to="lab_us-gaap_PremiumsWrittenNet_3FAC4289D6725B7ABE05D81727DD13FF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_537278099189A551C111A04F4AF7C55E_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_A1348A6C7F2D550F929EF853837CD314" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premiums Earned:</link:label>
    <link:label id="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_537278099189A551C111A04F4AF7C55E_label_en-US" xlink:label="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_A1348A6C7F2D550F929EF853837CD314" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums Earned, Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract" xlink:label="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_A1348A6C7F2D550F929EF853837CD314" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_A1348A6C7F2D550F929EF853837CD314" xlink:to="lab_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_A1348A6C7F2D550F929EF853837CD314" xlink:type="arc" />
    <link:label id="lab_us-gaap_DirectPremiumsEarned_96171079B02357B001A3A04F4AF7E4A5_terseLabel_en-US" xlink:label="lab_us-gaap_DirectPremiumsEarned_7E3773A0639E5B798566476B2170E518" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Direct</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DirectPremiumsEarned" xlink:label="loc_us-gaap_DirectPremiumsEarned_7E3773A0639E5B798566476B2170E518" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DirectPremiumsEarned_7E3773A0639E5B798566476B2170E518" xlink:to="lab_us-gaap_DirectPremiumsEarned_7E3773A0639E5B798566476B2170E518" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssumedPremiumsEarned_78A8D4FEE2183009A6FCA04F4AF7DF6B_terseLabel_en-US" xlink:label="lab_us-gaap_AssumedPremiumsEarned_A2D08CA1BA5E52E39145A3A9AD1DA4F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assumed</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssumedPremiumsEarned" xlink:label="loc_us-gaap_AssumedPremiumsEarned_A2D08CA1BA5E52E39145A3A9AD1DA4F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssumedPremiumsEarned_A2D08CA1BA5E52E39145A3A9AD1DA4F8" xlink:to="lab_us-gaap_AssumedPremiumsEarned_A2D08CA1BA5E52E39145A3A9AD1DA4F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract_288FA920195DEDD5F596A04F4AF792D9_terseLabel_en-US" xlink:label="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract_52586CEACDC655F7B8DF1B2F5F34F6D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss and loss expense incurred:</link:label>
    <link:label id="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract_288FA920195DEDD5F596A04F4AF792D9_label_en-US" xlink:label="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract_52586CEACDC655F7B8DF1B2F5F34F6D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Policyholder Benefits and Claims Incurred, Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract_52586CEACDC655F7B8DF1B2F5F34F6D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract_52586CEACDC655F7B8DF1B2F5F34F6D1" xlink:to="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredNetAbstract_52586CEACDC655F7B8DF1B2F5F34F6D1" xlink:type="arc" />
    <link:label id="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_315C8CE849CB9EF1CC30A04F4AF86639_terseLabel_en-US" xlink:label="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_C8C70B7A9862529DAB35F1892442D3AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Direct</link:label>
    <link:label id="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_315C8CE849CB9EF1CC30A04F4AF86639_label_en-US" xlink:label="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_C8C70B7A9862529DAB35F1892442D3AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Policyholder Benefits and Claims Incurred, Direct</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredGross" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_C8C70B7A9862529DAB35F1892442D3AE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_C8C70B7A9862529DAB35F1892442D3AE" xlink:to="lab_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_C8C70B7A9862529DAB35F1892442D3AE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed_02ECF09FA0D00D62636DA04F4AF85404_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed_2FEDB9E6F2525F62B46720CD66C718F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assumed</link:label>
    <link:label id="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed_02ECF09FA0D00D62636DA04F4AF85404_label_en-US" xlink:label="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed_2FEDB9E6F2525F62B46720CD66C718F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Policyholder Benefits and Claims Incurred, Assumed</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed" xlink:label="loc_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed_2FEDB9E6F2525F62B46720CD66C718F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed_2FEDB9E6F2525F62B46720CD66C718F8" xlink:to="lab_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed_2FEDB9E6F2525F62B46720CD66C718F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_A3BFC366F352306B33EDA04F4AF8D18F_totalLabel_en-US" xlink:label="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_3EF4AF0914F35074AA5910D968B1EC49" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncurredClaimsPropertyCasualtyAndLiability" xlink:label="loc_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_3EF4AF0914F35074AA5910D968B1EC49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_3EF4AF0914F35074AA5910D968B1EC49" xlink:to="lab_us-gaap_IncurredClaimsPropertyCasualtyAndLiability_3EF4AF0914F35074AA5910D968B1EC49" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_A5BE8874E4FD76D7AB83101EE431A4B0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8CC06DB304B25B1898D6BF739595DFB7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Risk-free interest rate</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_A5BE8874E4FD76D7AB83101EE431A4B0_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8CC06DB304B25B1898D6BF739595DFB7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8CC06DB304B25B1898D6BF739595DFB7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8CC06DB304B25B1898D6BF739595DFB7" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8CC06DB304B25B1898D6BF739595DFB7" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_2E69F38A420482FD9A3C101EE432159D_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_D97E1C3507F356D2AD21F930DB51A18E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected term</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_2E69F38A420482FD9A3C101EE432159D_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_D97E1C3507F356D2AD21F930DB51A18E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_D97E1C3507F356D2AD21F930DB51A18E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_D97E1C3507F356D2AD21F930DB51A18E" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_D97E1C3507F356D2AD21F930DB51A18E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_A589C080CFF96DAC21EE101EE432EC42_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_046CBBADC50E5A569C50E9458E226C50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend yield</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_A589C080CFF96DAC21EE101EE432EC42_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_046CBBADC50E5A569C50E9458E226C50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_046CBBADC50E5A569C50E9458E226C50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_046CBBADC50E5A569C50E9458E226C50" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_046CBBADC50E5A569C50E9458E226C50" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_3A92F047884D958AC0DF101EE4321F2F_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_A9859E38623159A0A472AEE0BB648739" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected volatility</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_3A92F047884D958AC0DF101EE4321F2F_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_A9859E38623159A0A472AEE0BB648739" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_A9859E38623159A0A472AEE0BB648739" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_A9859E38623159A0A472AEE0BB648739" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_A9859E38623159A0A472AEE0BB648739" xlink:type="arc" />
    <link:label id="lab_sigi_StatutoryFinancialInformationDisclosureTextBlock_37195B650BA4E69C3AEB101EE4699BE1_terseLabel_en-US" xlink:label="lab_sigi_StatutoryFinancialInformationDisclosureTextBlock_66CFBF84F14D5527B509949C0E26CCCB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statutory Financial Information, Capital Requirments, and Retrictions on Dividends and Transfers of Funds</link:label>
    <link:label id="lab_sigi_StatutoryFinancialInformationDisclosureTextBlock_37195B650BA4E69C3AEB101EE4699BE1_label_en-US" xlink:label="lab_sigi_StatutoryFinancialInformationDisclosureTextBlock_66CFBF84F14D5527B509949C0E26CCCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Financial Information Disclosure [Text Block]</link:label>
    <link:label id="lab_sigi_StatutoryFinancialInformationDisclosureTextBlock_37195B650BA4E69C3AEB101EE4699BE1_documentation_en-US" xlink:label="lab_sigi_StatutoryFinancialInformationDisclosureTextBlock_66CFBF84F14D5527B509949C0E26CCCB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of insurance subsidiaries' statutory surplus, unassigned surplus and statutory net income.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StatutoryFinancialInformationDisclosureTextBlock" xlink:label="loc_sigi_StatutoryFinancialInformationDisclosureTextBlock_66CFBF84F14D5527B509949C0E26CCCB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StatutoryFinancialInformationDisclosureTextBlock_66CFBF84F14D5527B509949C0E26CCCB" xlink:to="lab_sigi_StatutoryFinancialInformationDisclosureTextBlock_66CFBF84F14D5527B509949C0E26CCCB" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock_FD56831CDBD0F57AF5AF9FB6F111F6FF_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock_DF14A203D0A85900B5F9A57374184E45" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reserve for Loss and Loss Expense</link:label>
    <link:label id="lab_us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock_FD56831CDBD0F57AF5AF9FB6F111F6FF_label_en-US" xlink:label="lab_us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock_DF14A203D0A85900B5F9A57374184E45" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock_DF14A203D0A85900B5F9A57374184E45" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock_DF14A203D0A85900B5F9A57374184E45" xlink:to="lab_us-gaap_LiabilityForFuturePolicyBenefitsAndUnpaidClaimsDisclosureTextBlock_DF14A203D0A85900B5F9A57374184E45" xlink:type="arc" />
    <link:label id="lab_sigi_DisclosureofESPPandASPPShareIssuanceAbstract_322833076D33B0AD935C101EE546D0F4_label_en-US" xlink:label="lab_sigi_DisclosureofESPPandASPPShareIssuanceAbstract_E9713D2A0AF951FD9617CFFF0FDE0AA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of ESPP and ASPP Share Issuance [Abstract]</link:label>
    <link:label id="lab_sigi_DisclosureofESPPandASPPShareIssuanceAbstract_322833076D33B0AD935C101EE546D0F4_documentation_en-US" xlink:label="lab_sigi_DisclosureofESPPandASPPShareIssuanceAbstract_E9713D2A0AF951FD9617CFFF0FDE0AA9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of ESPP and ASPP Share Issuance [Abstract]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DisclosureofESPPandASPPShareIssuanceAbstract" xlink:label="loc_sigi_DisclosureofESPPandASPPShareIssuanceAbstract_E9713D2A0AF951FD9617CFFF0FDE0AA9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DisclosureofESPPandASPPShareIssuanceAbstract_E9713D2A0AF951FD9617CFFF0FDE0AA9" xlink:to="lab_sigi_DisclosureofESPPandASPPShareIssuanceAbstract_E9713D2A0AF951FD9617CFFF0FDE0AA9" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable_6923535AD6E89CE47224101EE5462313_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable_37E5485B107553BE84198FA094B34023" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation ESPP and ASPP Shares Granted [Table]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable_6923535AD6E89CE47224101EE5462313_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable_37E5485B107553BE84198FA094B34023" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of schedule of Share-Based Compensation ESPP and ASPP Shares Granted</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable" xlink:label="loc_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable_37E5485B107553BE84198FA094B34023" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable_37E5485B107553BE84198FA094B34023" xlink:to="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedTable_37E5485B107553BE84198FA094B34023" xlink:type="arc" />
    <link:label id="lab_us-gaap_PlanNameAxis_C5E188CA17558B2FCB3C101EE5461B7E_verboseLabel_en-US" xlink:label="lab_us-gaap_PlanNameAxis_36C64A9A1FE450F8BD8A41BE4EBDBB52" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:label id="lab_us-gaap_PlanNameAxis_C5E188CA17558B2FCB3C101EE5461B7E_label_en-US" xlink:label="lab_us-gaap_PlanNameAxis_36C64A9A1FE450F8BD8A41BE4EBDBB52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_36C64A9A1FE450F8BD8A41BE4EBDBB52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameAxis_36C64A9A1FE450F8BD8A41BE4EBDBB52" xlink:to="lab_us-gaap_PlanNameAxis_36C64A9A1FE450F8BD8A41BE4EBDBB52" xlink:type="arc" />
    <link:label id="lab_us-gaap_PlanNameDomain_115E289302C25457FAB1101EE5467D57_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameDomain_9F06F0472E45571599C4EBD7C64BDE31" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:label id="lab_us-gaap_PlanNameDomain_115E289302C25457FAB1101EE5467D57_label_en-US" xlink:label="lab_us-gaap_PlanNameDomain_9F06F0472E45571599C4EBD7C64BDE31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Plan Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_9F06F0472E45571599C4EBD7C64BDE31" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameDomain_9F06F0472E45571599C4EBD7C64BDE31" xlink:to="lab_us-gaap_PlanNameDomain_9F06F0472E45571599C4EBD7C64BDE31" xlink:type="arc" />
    <link:label id="lab_sigi_EmployeeStockPurchasePlanMember_384564A73DD71CA28C86101EE546A13F_terseLabel_en-US" xlink:label="lab_sigi_EmployeeStockPurchasePlanMember_5900C126C0E1556F9EC78F338BD8A7F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Stock [Member]</link:label>
    <link:label id="lab_sigi_EmployeeStockPurchasePlanMember_384564A73DD71CA28C86101EE546A13F_label_en-US" xlink:label="lab_sigi_EmployeeStockPurchasePlanMember_5900C126C0E1556F9EC78F338BD8A7F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Stock Purchase Plan [Member]</link:label>
    <link:label id="lab_sigi_EmployeeStockPurchasePlanMember_384564A73DD71CA28C86101EE546A13F_documentation_en-US" xlink:label="lab_sigi_EmployeeStockPurchasePlanMember_5900C126C0E1556F9EC78F338BD8A7F9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Plan in which Selective employees can purchase stock.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_EmployeeStockPurchasePlanMember" xlink:label="loc_sigi_EmployeeStockPurchasePlanMember_5900C126C0E1556F9EC78F338BD8A7F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_EmployeeStockPurchasePlanMember_5900C126C0E1556F9EC78F338BD8A7F9" xlink:to="lab_sigi_EmployeeStockPurchasePlanMember_5900C126C0E1556F9EC78F338BD8A7F9" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_4974CD2CDE19FA7A9C7F101EE5461EA6_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_ECF4A387857E55A3AB9ED249873C195A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation ESPP and ASPP Shares Granted [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_4974CD2CDE19FA7A9C7F101EE5461EA6_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_ECF4A387857E55A3AB9ED249873C195A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation ESPP and ASPP Shares Granted [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_4974CD2CDE19FA7A9C7F101EE5461EA6_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_ECF4A387857E55A3AB9ED249873C195A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Line Items] for Tabular disclosure of schedule of Share-Based Compensation ESPP and ASPP Shares Granted</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems" xlink:label="loc_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_ECF4A387857E55A3AB9ED249873C195A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_ECF4A387857E55A3AB9ED249873C195A" xlink:to="lab_sigi_ScheduleofShareBasedCompensationESPPandASPPSharesGrantedLineItems_ECF4A387857E55A3AB9ED249873C195A" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_A33517795B2C9F39BF8C101EE546B0C2_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_FF17D8FFCAFC506F80D92B4CF90FF923" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued During Period Shares</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_A33517795B2C9F39BF8C101EE546B0C2_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_FF17D8FFCAFC506F80D92B4CF90FF923" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_FF17D8FFCAFC506F80D92B4CF90FF923" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_FF17D8FFCAFC506F80D92B4CF90FF923" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_FF17D8FFCAFC506F80D92B4CF90FF923" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable_0085C1E94AADCC37748BB0BD7E4FB487_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable_4FDC3674864D569D94D2DD041B4CEA93" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable_0085C1E94AADCC37748BB0BD7E4FB487_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable_4FDC3674864D569D94D2DD041B4CEA93" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable_4FDC3674864D569D94D2DD041B4CEA93" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable_4FDC3674864D569D94D2DD041B4CEA93" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityTable_4FDC3674864D569D94D2DD041B4CEA93" xlink:type="arc" />
    <link:label id="lab_sigi_OtherCommercialMember_B308AAC9924EE5621213B0BD7E5F2995_terseLabel_en-US" xlink:label="lab_sigi_OtherCommercialMember_98D9A9A7D8FE5723A99B5D21F3C62C86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Commercial [Member]</link:label>
    <link:label id="lab_sigi_OtherCommercialMember_B308AAC9924EE5621213B0BD7E5F2995_label_en-US" xlink:label="lab_sigi_OtherCommercialMember_98D9A9A7D8FE5723A99B5D21F3C62C86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commercial [Member]</link:label>
    <link:label id="lab_sigi_OtherCommercialMember_B308AAC9924EE5621213B0BD7E5F2995_documentation_en-US" xlink:label="lab_sigi_OtherCommercialMember_98D9A9A7D8FE5723A99B5D21F3C62C86" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance coverage provided to policy holders on other commercial line policies.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherCommercialMember" xlink:label="loc_sigi_OtherCommercialMember_98D9A9A7D8FE5723A99B5D21F3C62C86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherCommercialMember_98D9A9A7D8FE5723A99B5D21F3C62C86" xlink:to="lab_sigi_OtherCommercialMember_98D9A9A7D8FE5723A99B5D21F3C62C86" xlink:type="arc" />
    <link:label id="lab_sigi_TotalCommercialLinesMember_F7484A9A191AD8F80B7BB0BD7E5F00DA_verboseLabel_en-US" xlink:label="lab_sigi_TotalCommercialLinesMember_35B754FBD07250E5884158C293139A2C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total Standard Commercial Lines [Member]</link:label>
    <link:label id="lab_sigi_TotalCommercialLinesMember_F7484A9A191AD8F80B7BB0BD7E5F00DA_label_en-US" xlink:label="lab_sigi_TotalCommercialLinesMember_35B754FBD07250E5884158C293139A2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Commercial Lines [Member]</link:label>
    <link:label id="lab_sigi_TotalCommercialLinesMember_F7484A9A191AD8F80B7BB0BD7E5F00DA_documentation_en-US" xlink:label="lab_sigi_TotalCommercialLinesMember_35B754FBD07250E5884158C293139A2C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents total commercial property and casualty coverage on the entity's commercial lines of business.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalCommercialLinesMember" xlink:label="loc_sigi_TotalCommercialLinesMember_35B754FBD07250E5884158C293139A2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalCommercialLinesMember_35B754FBD07250E5884158C293139A2C" xlink:to="lab_sigi_TotalCommercialLinesMember_35B754FBD07250E5884158C293139A2C" xlink:type="arc" />
    <link:label id="lab_sigi_OtherPersonalMember_69B6311CC7A73675A797B0BD7E5F8D37_terseLabel_en-US" xlink:label="lab_sigi_OtherPersonalMember_442679CD27F9509DB742C9B531E872E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Personal [Member]</link:label>
    <link:label id="lab_sigi_OtherPersonalMember_69B6311CC7A73675A797B0BD7E5F8D37_label_en-US" xlink:label="lab_sigi_OtherPersonalMember_442679CD27F9509DB742C9B531E872E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Personal [Member]</link:label>
    <link:label id="lab_sigi_OtherPersonalMember_69B6311CC7A73675A797B0BD7E5F8D37_documentation_en-US" xlink:label="lab_sigi_OtherPersonalMember_442679CD27F9509DB742C9B531E872E0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents insurance coverage provided to policy holders on other personal line policies.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherPersonalMember" xlink:label="loc_sigi_OtherPersonalMember_442679CD27F9509DB742C9B531E872E0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherPersonalMember_442679CD27F9509DB742C9B531E872E0" xlink:to="lab_sigi_OtherPersonalMember_442679CD27F9509DB742C9B531E872E0" xlink:type="arc" />
    <link:label id="lab_sigi_TotalESLinesMember_0DF47A3F87FEC749830CB0BFA37AEA4A_terseLabel_en-US" xlink:label="lab_sigi_TotalESLinesMember_00F760949D4D57408766AF3623A76FAD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total E&amp;S Lines [Member]</link:label>
    <link:label id="lab_sigi_TotalESLinesMember_0DF47A3F87FEC749830CB0BFA37AEA4A_label_en-US" xlink:label="lab_sigi_TotalESLinesMember_00F760949D4D57408766AF3623A76FAD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total E&amp;S Lines [Member]</link:label>
    <link:label id="lab_sigi_TotalESLinesMember_0DF47A3F87FEC749830CB0BFA37AEA4A_documentation_en-US" xlink:label="lab_sigi_TotalESLinesMember_00F760949D4D57408766AF3623A76FAD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents total E&amp;S property and casualty coverage on the entity's E&amp;S lines of business.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalESLinesMember" xlink:label="loc_sigi_TotalESLinesMember_00F760949D4D57408766AF3623A76FAD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalESLinesMember_00F760949D4D57408766AF3623A76FAD" xlink:to="lab_sigi_TotalESLinesMember_00F760949D4D57408766AF3623A76FAD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems_DDCD0F7BD2028EBA7D02B0BD7E5F76AE_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems_9091B8F808B456DB9E85B0D77F5D16C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems_DDCD0F7BD2028EBA7D02B0BD7E5F76AE_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems_9091B8F808B456DB9E85B0D77F5D16C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems_9091B8F808B456DB9E85B0D77F5D16C0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems_9091B8F808B456DB9E85B0D77F5D16C0" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsReconciliationOfClaimsDevelopmentToLiabilityLineItems_9091B8F808B456DB9E85B0D77F5D16C0" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_D42EEB292F3336B46957B0BD7E5FCC88_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_268BBB72F37858DFAE4BF07E6E290394" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net outstanding liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_268BBB72F37858DFAE4BF07E6E290394" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_268BBB72F37858DFAE4BF07E6E290394" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_268BBB72F37858DFAE4BF07E6E290394" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_257E129BB7A6A4DEE53CB0BD7E5FB3D3_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_4484FF9A6DD55667A51251A346CE9B90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance Recoverable for Unpaid Claims and Claims Adjustments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments" xlink:label="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_4484FF9A6DD55667A51251A346CE9B90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_4484FF9A6DD55667A51251A346CE9B90" xlink:to="lab_us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments_4484FF9A6DD55667A51251A346CE9B90" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense_84B4FDCC698B5EE8E7CFB0BD7E5F588E_terseLabel_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense_D8354F50678D53CAB5929453CBD7D3C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Liability for Unpaid Claims and Claims Adjustment Expense, Accumulated Unallocated Claim Adjustment Expense</link:label>
    <link:label id="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense_84B4FDCC698B5EE8E7CFB0BD7E5F588E_label_en-US" xlink:label="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense_D8354F50678D53CAB5929453CBD7D3C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-duration Insurance Contracts, Liability for Unpaid Claims and Claims Adjustment Expense, Accumulated Unallocated Claim Adjustment Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense" xlink:label="loc_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense_D8354F50678D53CAB5929453CBD7D3C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense_D8354F50678D53CAB5929453CBD7D3C6" xlink:to="lab_us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense_D8354F50678D53CAB5929453CBD7D3C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_AD02290865A05009441DB0BD7E5F333D_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_4CDD615FA7A658A19D0C1EC2F7ED0A86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for Claims and Claims Adjustment Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_4CDD615FA7A658A19D0C1EC2F7ED0A86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_4CDD615FA7A658A19D0C1EC2F7ED0A86" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_4CDD615FA7A658A19D0C1EC2F7ED0A86" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesBalance_37AE7512D6A77C4F4EC1101EE4378DBE_periodStartLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesBalance_3BB6936097485F71946E7CF01FA9B65B" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance, January 1</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_3BB6936097485F71946E7CF01FA9B65B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesBalance_3BB6936097485F71946E7CF01FA9B65B" xlink:to="lab_us-gaap_ValuationAllowancesAndReservesBalance_3BB6936097485F71946E7CF01FA9B65B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_4DE222AB095A55086752101EE4378B3B_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_6A1F3AC0A093538B8B0E19EDE7C12515" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_4DE222AB095A55086752101EE4378B3B_label_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_6A1F3AC0A093538B8B0E19EDE7C12515" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Allowances and Reserves, Additions for Charges to Cost and Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_6A1F3AC0A093538B8B0E19EDE7C12515" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_6A1F3AC0A093538B8B0E19EDE7C12515" xlink:to="lab_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_6A1F3AC0A093538B8B0E19EDE7C12515" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesDeductions_85FC3E0F2466B9C33799101EE437F1F7_negatedLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesDeductions_D11FBBE39B035ADFB11B30873D30CE12" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Deductions</link:label>
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesDeductions_85FC3E0F2466B9C33799101EE437F1F7_label_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesDeductions_D11FBBE39B035ADFB11B30873D30CE12" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Allowances and Reserves, Deductions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_D11FBBE39B035ADFB11B30873D30CE12" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDeductions_D11FBBE39B035ADFB11B30873D30CE12" xlink:to="lab_us-gaap_ValuationAllowancesAndReservesDeductions_D11FBBE39B035ADFB11B30873D30CE12" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesBalance_B39AF0440BE55C4B0FCE101EE437900A_periodEndLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesBalance_FF89A5C7B85251FB8D3E072F650001C5" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance, December 31</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_FF89A5C7B85251FB8D3E072F650001C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesBalance_FF89A5C7B85251FB8D3E072F650001C5" xlink:to="lab_us-gaap_ValuationAllowancesAndReservesBalance_FF89A5C7B85251FB8D3E072F650001C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_4FD218F8784FDE84EA92101EE3AF2FA6_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_47DCE5C1E90D56D3A2278E5C0B4DEFF6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Share</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_4FD218F8784FDE84EA92101EE3AF2FA6_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_47DCE5C1E90D56D3A2278E5C0B4DEFF6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_47DCE5C1E90D56D3A2278E5C0B4DEFF6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareTextBlock_47DCE5C1E90D56D3A2278E5C0B4DEFF6" xlink:to="lab_us-gaap_EarningsPerShareTextBlock_47DCE5C1E90D56D3A2278E5C0B4DEFF6" xlink:type="arc" />
    <link:label id="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_82D769B61FAD14B97662101EE47C6539_terseLabel_en-US" xlink:label="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_91635D67CC1F5233BC851AFF20C5ECB3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule II- Parent Corporation Financial Statements</link:label>
    <link:label id="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_82D769B61FAD14B97662101EE47C6539_label_en-US" xlink:label="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_91635D67CC1F5233BC851AFF20C5ECB3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Information of Parent Company Only Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:label="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_91635D67CC1F5233BC851AFF20C5ECB3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_91635D67CC1F5233BC851AFF20C5ECB3" xlink:to="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_91635D67CC1F5233BC851AFF20C5ECB3" xlink:type="arc" />
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_1723FC85E028025DB3E0101EE2540C45_terseLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_5802F974CEEC5BE6836D36DE0B70EDED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retirement Plans</link:label>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_1723FC85E028025DB3E0101EE2540C45_label_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_5802F974CEEC5BE6836D36DE0B70EDED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension and Other Postretirement Benefits Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_5802F974CEEC5BE6836D36DE0B70EDED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_5802F974CEEC5BE6836D36DE0B70EDED" xlink:to="lab_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_5802F974CEEC5BE6836D36DE0B70EDED" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasicAbstract_EE29110E7FDD204E7AE8A04F733FFB19_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAbstract_E50A51E881D25B2AAA4B56924B523F01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic EPS: [Abstract]</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasicAbstract_EE29110E7FDD204E7AE8A04F733FFB19_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAbstract_E50A51E881D25B2AAA4B56924B523F01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAbstract_E50A51E881D25B2AAA4B56924B523F01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasicAbstract_E50A51E881D25B2AAA4B56924B523F01" xlink:to="lab_us-gaap_EarningsPerShareBasicAbstract_E50A51E881D25B2AAA4B56924B523F01" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F178C0E92E5C2C47FE36A04F734018F3_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_E066639D1CE65061A3A22582F70E0BD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income, basic shares</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F178C0E92E5C2C47FE36A04F734018F3_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_E066639D1CE65061A3A22582F70E0BD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_E066639D1CE65061A3A22582F70E0BD9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_E066639D1CE65061A3A22582F70E0BD9" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_E066639D1CE65061A3A22582F70E0BD9" xlink:type="arc" />
    <link:label id="lab_us-gaap_DilutiveSecuritiesAbstract_0CB681521DCD4CCB5E2AA04F7340314D_terseLabel_en-US" xlink:label="lab_us-gaap_DilutiveSecuritiesAbstract_8CAE35AA252653679C7486DAA7F52D71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effect of dilutive securities: [Abstract]</link:label>
    <link:label id="lab_us-gaap_DilutiveSecuritiesAbstract_0CB681521DCD4CCB5E2AA04F7340314D_label_en-US" xlink:label="lab_us-gaap_DilutiveSecuritiesAbstract_8CAE35AA252653679C7486DAA7F52D71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dilutive Securities, Effect on Basic Earnings Per Share [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DilutiveSecuritiesAbstract" xlink:label="loc_us-gaap_DilutiveSecuritiesAbstract_8CAE35AA252653679C7486DAA7F52D71" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DilutiveSecuritiesAbstract_8CAE35AA252653679C7486DAA7F52D71" xlink:to="lab_us-gaap_DilutiveSecuritiesAbstract_8CAE35AA252653679C7486DAA7F52D71" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_68A7FF1CDDCB5E3930FEA05C27D090BC_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_F16C9C1A009352A1AF20D060C55AFD85" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock compensation plans, shares</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_68A7FF1CDDCB5E3930FEA05C27D090BC_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_F16C9C1A009352A1AF20D060C55AFD85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number Diluted Shares Outstanding Adjustment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_F16C9C1A009352A1AF20D060C55AFD85" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_F16C9C1A009352A1AF20D060C55AFD85" xlink:to="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_F16C9C1A009352A1AF20D060C55AFD85" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareDilutedAbstract_2B304FEEF59ADA6A8125A04F734038D3_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDilutedAbstract_32CE01422B6755C28FE7C33C671CEC1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Diluted [Abstract]</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDilutedAbstract_2B304FEEF59ADA6A8125A04F734038D3_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareDilutedAbstract_32CE01422B6755C28FE7C33C671CEC1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Diluted [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareDilutedAbstract_32CE01422B6755C28FE7C33C671CEC1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDilutedAbstract_32CE01422B6755C28FE7C33C671CEC1D" xlink:to="lab_us-gaap_EarningsPerShareDilutedAbstract_32CE01422B6755C28FE7C33C671CEC1D" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_6AB4FF5E715064034E62A04F7340BDE9_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DF16A2CDED9A5845BFE3141528591793" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares net income, Diluted</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_6AB4FF5E715064034E62A04F7340BDE9_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DF16A2CDED9A5845BFE3141528591793" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DF16A2CDED9A5845BFE3141528591793" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DF16A2CDED9A5845BFE3141528591793" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DF16A2CDED9A5845BFE3141528591793" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_2D3C6F18AFF9C4971BB8A02B8655847C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_46EF2E8ED015514A85375E5C26B891CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Federal Income Tax on Income at the Corporate Rate to the Effective Tax Rate</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_2D3C6F18AFF9C4971BB8A02B8655847C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_46EF2E8ED015514A85375E5C26B891CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_46EF2E8ED015514A85375E5C26B891CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_46EF2E8ED015514A85375E5C26B891CD" xlink:to="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_46EF2E8ED015514A85375E5C26B891CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_8D9B9B3784B348AB82D2A02B8655F9BD_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_19C86C73D4575F6983EFC703DEEB43D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Deferred Tax Assets and Liabilities</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_8D9B9B3784B348AB82D2A02B8655F9BD_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_19C86C73D4575F6983EFC703DEEB43D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Deferred Tax Assets and Liabilities [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_19C86C73D4575F6983EFC703DEEB43D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_19C86C73D4575F6983EFC703DEEB43D0" xlink:to="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_19C86C73D4575F6983EFC703DEEB43D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BF009A1841CD4293B8A8101EE63D609F_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_1590984D450355438513A1B7E9BFCEB4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Reconciliation of Earnings Per Share</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BF009A1841CD4293B8A8101EE63D609F_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_1590984D450355438513A1B7E9BFCEB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_1590984D450355438513A1B7E9BFCEB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_1590984D450355438513A1B7E9BFCEB4" xlink:to="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_1590984D450355438513A1B7E9BFCEB4" xlink:type="arc" />
    <link:label id="lab_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_1878D4F5F75649A5FFD2101EE475C87C_terseLabel_en-US" xlink:label="lab_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_EE4650A24B705E618BF4D65629D0924C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum exposure to credit concentration risk of the Company's stockholder's equity other than certain U.S. government agencies</link:label>
    <link:label id="lab_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_1878D4F5F75649A5FFD2101EE475C87C_label_en-US" xlink:label="lab_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_EE4650A24B705E618BF4D65629D0924C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum exposure to credit concentration risk of the Company's stockholder's equity other than certain U.S. government agencies</link:label>
    <link:label id="lab_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_1878D4F5F75649A5FFD2101EE475C87C_documentation_en-US" xlink:label="lab_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_EE4650A24B705E618BF4D65629D0924C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum exposure to credit concentration risk of the Company's stockholder's equity other than certain U.S. government agencies</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies" xlink:label="loc_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_EE4650A24B705E618BF4D65629D0924C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_EE4650A24B705E618BF4D65629D0924C" xlink:to="lab_sigi_MaximumexposuretocreditconcentrationriskoftheCompanysstockholdersequityotherthancertainU.S.governmentagencies_EE4650A24B705E618BF4D65629D0924C" xlink:type="arc" />
    <link:label id="lab_sigi_FundedStatusOfRetirementIncomePlanAxis_68720CEB05A130AB620D8C93FCBB797A_terseLabel_en-US" xlink:label="lab_sigi_FundedStatusOfRetirementIncomePlanAxis_DBFD090D462056898EDA0C283EA19335" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Funded Status Of Retirement Income Plan [Axis]</link:label>
    <link:label id="lab_sigi_FundedStatusOfRetirementIncomePlanAxis_68720CEB05A130AB620D8C93FCBB797A_label_en-US" xlink:label="lab_sigi_FundedStatusOfRetirementIncomePlanAxis_DBFD090D462056898EDA0C283EA19335" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Funded Status Of Retirement Income Plan [Axis]</link:label>
    <link:label id="lab_sigi_FundedStatusOfRetirementIncomePlanAxis_68720CEB05A130AB620D8C93FCBB797A_documentation_en-US" xlink:label="lab_sigi_FundedStatusOfRetirementIncomePlanAxis_DBFD090D462056898EDA0C283EA19335" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Funded status of Retirement Income Plan [Axis]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FundedStatusOfRetirementIncomePlanAxis" xlink:label="loc_sigi_FundedStatusOfRetirementIncomePlanAxis_DBFD090D462056898EDA0C283EA19335" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FundedStatusOfRetirementIncomePlanAxis_DBFD090D462056898EDA0C283EA19335" xlink:to="lab_sigi_FundedStatusOfRetirementIncomePlanAxis_DBFD090D462056898EDA0C283EA19335" xlink:type="arc" />
    <link:label id="lab_sigi_FundedStatusOfRetirementIncomePlanDomain_3C5F97CF832E73D93FE68C93FCBBAC30_terseLabel_en-US" xlink:label="lab_sigi_FundedStatusOfRetirementIncomePlanDomain_50769CF7E9CC5AADA0BF50EA31A321CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Funded Status Of Retirement Income Plan [Domain]</link:label>
    <link:label id="lab_sigi_FundedStatusOfRetirementIncomePlanDomain_3C5F97CF832E73D93FE68C93FCBBAC30_label_en-US" xlink:label="lab_sigi_FundedStatusOfRetirementIncomePlanDomain_50769CF7E9CC5AADA0BF50EA31A321CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Funded Status Of Retirement Income Plan [Domain]</link:label>
    <link:label id="lab_sigi_FundedStatusOfRetirementIncomePlanDomain_3C5F97CF832E73D93FE68C93FCBBAC30_documentation_en-US" xlink:label="lab_sigi_FundedStatusOfRetirementIncomePlanDomain_50769CF7E9CC5AADA0BF50EA31A321CD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for Funded status of Retirement Income Plan [Axis]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FundedStatusOfRetirementIncomePlanDomain" xlink:label="loc_sigi_FundedStatusOfRetirementIncomePlanDomain_50769CF7E9CC5AADA0BF50EA31A321CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FundedStatusOfRetirementIncomePlanDomain_50769CF7E9CC5AADA0BF50EA31A321CD" xlink:to="lab_sigi_FundedStatusOfRetirementIncomePlanDomain_50769CF7E9CC5AADA0BF50EA31A321CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_D024520F11569B468CDD8C93FCC31386_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A71C9D8540235FA98E9A8A38B54BEA9B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contributions by Employer</link:label>
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_D024520F11569B468CDD8C93FCC31386_label_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A71C9D8540235FA98E9A8A38B54BEA9B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contributions by Employer</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A71C9D8540235FA98E9A8A38B54BEA9B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A71C9D8540235FA98E9A8A38B54BEA9B" xlink:to="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A71C9D8540235FA98E9A8A38B54BEA9B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_CE294B5AD677CCE5BFD08C93FCC33E5D_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_03B24C927E5157AA93052E2951286541" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Amortization of Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_03B24C927E5157AA93052E2951286541" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_03B24C927E5157AA93052E2951286541" xlink:to="lab_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_03B24C927E5157AA93052E2951286541" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_C2127065CE78D0FCFA748C93FCC339C1_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_C5683879C3C654B5B225AB88F4E98430" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net actuarial gain (loss), Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_C5683879C3C654B5B225AB88F4E98430" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_C5683879C3C654B5B225AB88F4E98430" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_C5683879C3C654B5B225AB88F4E98430" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_BF05695B7A2E4507487C8C93FCC34B39_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_CF4E50DD740C5B09BE90B7C02A958591" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_BF05695B7A2E4507487C8C93FCC34B39_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_CF4E50DD740C5B09BE90B7C02A958591" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_CF4E50DD740C5B09BE90B7C02A958591" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_CF4E50DD740C5B09BE90B7C02A958591" xlink:to="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_CF4E50DD740C5B09BE90B7C02A958591" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_DAF85A1BEC99DB53F68A8C93FCC4D730_periodStartLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation_5E4F8295D52E57DC94C41FAB14695E01" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Benefit obligation, beginning of year</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_DAF85A1BEC99DB53F68A8C93FCC4D730_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation_5E4F8295D52E57DC94C41FAB14695E01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_5E4F8295D52E57DC94C41FAB14695E01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligation_5E4F8295D52E57DC94C41FAB14695E01" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligation_5E4F8295D52E57DC94C41FAB14695E01" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_9E1CD9AF001EB18A17BE8C93FCC58918_negatedLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_000554FF4E2054E9BD77DCCAE69FECF1" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Actuarial losses (gains)</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_9E1CD9AF001EB18A17BE8C93FCC58918_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_000554FF4E2054E9BD77DCCAE69FECF1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_000554FF4E2054E9BD77DCCAE69FECF1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_000554FF4E2054E9BD77DCCAE69FECF1" xlink:to="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_000554FF4E2054E9BD77DCCAE69FECF1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_4C2147A4EE25DB215CE38C93FCC5EA83_periodEndLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation_54CC52DA7C1A5F5A8B47C0020B5433C9" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Benefit obligation, end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_54CC52DA7C1A5F5A8B47C0020B5433C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligation_54CC52DA7C1A5F5A8B47C0020B5433C9" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligation_54CC52DA7C1A5F5A8B47C0020B5433C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C25C7018675CE5C0FAFE8C93FCC59CE9_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_D8B6D94A5E19514E9872BAA78BBC9E4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_C25C7018675CE5C0FAFE8C93FCC59CE9_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_D8B6D94A5E19514E9872BAA78BBC9E4C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_D8B6D94A5E19514E9872BAA78BBC9E4C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_D8B6D94A5E19514E9872BAA78BBC9E4C" xlink:to="lab_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_D8B6D94A5E19514E9872BAA78BBC9E4C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_109456BC876419B81FAA8C93FCC62445_periodStartLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_C643E19F6DBE57E3A57A83E4B64AC54F" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Fair value of assets, beginning of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_C643E19F6DBE57E3A57A83E4B64AC54F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_C643E19F6DBE57E3A57A83E4B64AC54F" xlink:to="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_C643E19F6DBE57E3A57A83E4B64AC54F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_754EF4A2BB18A3C5199B8C93FCC6AE24_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_219F32AE94AD5319A7B04078AAD7510A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Actual return on plan assets, net of expenses</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_754EF4A2BB18A3C5199B8C93FCC6AE24_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_219F32AE94AD5319A7B04078AAD7510A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_219F32AE94AD5319A7B04078AAD7510A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_219F32AE94AD5319A7B04078AAD7510A" xlink:to="lab_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_219F32AE94AD5319A7B04078AAD7510A" xlink:type="arc" />
    <link:label id="lab_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_A4A5F4598DBBC120DF738C93FCC6D5C7_terseLabel_en-US" xlink:label="lab_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_B0131D7323D8519FB6C07E63422EF59B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contributions by the employer to funded plans</link:label>
    <link:label id="lab_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_A4A5F4598DBBC120DF738C93FCC6D5C7_label_en-US" xlink:label="lab_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_B0131D7323D8519FB6C07E63422EF59B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan Contributions By Employer To Funded Plans</link:label>
    <link:label id="lab_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_A4A5F4598DBBC120DF738C93FCC6D5C7_documentation_en-US" xlink:label="lab_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_B0131D7323D8519FB6C07E63422EF59B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The increase in the fair value of plan assets from contributions made by the employer to qualified, funded plans.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans" xlink:label="loc_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_B0131D7323D8519FB6C07E63422EF59B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_B0131D7323D8519FB6C07E63422EF59B" xlink:to="lab_sigi_DefinedBenefitPlanContributionsByEmployerToFundedPlans_B0131D7323D8519FB6C07E63422EF59B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_84019A28E1F9F189ACE78C93FCC64795_negatedLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_ABBEDB7728C95CB680060873CE033319" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Benefits paid fair value</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_84019A28E1F9F189ACE78C93FCC64795_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_ABBEDB7728C95CB680060873CE033319" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Benefits Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_ABBEDB7728C95CB680060873CE033319" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_ABBEDB7728C95CB680060873CE033319" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_ABBEDB7728C95CB680060873CE033319" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_0F8D3C0122EF0B662C868C93FCC6D074_periodEndLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_0E1E56030B5B5D43B233AC8348F31348" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Fair value of assets, end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_0E1E56030B5B5D43B233AC8348F31348" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_0E1E56030B5B5D43B233AC8348F31348" xlink:to="lab_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_0E1E56030B5B5D43B233AC8348F31348" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_9FBD1BD1AD4E3C7D61398C93FCC76CBA_totalLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_01458E42E82F575A9714B8464C63CAFB" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Funded status</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_9FBD1BD1AD4E3C7D61398C93FCC76CBA_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_01458E42E82F575A9714B8464C63CAFB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Funded (Unfunded) Status of Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_01458E42E82F575A9714B8464C63CAFB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_01458E42E82F575A9714B8464C63CAFB" xlink:to="lab_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_01458E42E82F575A9714B8464C63CAFB" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_1CF35F44443964801C998C93FCC7F6A1_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EF716333BCC25F18B2A8792528E42010" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_1CF35F44443964801C998C93FCC7F6A1_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EF716333BCC25F18B2A8792528E42010" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EF716333BCC25F18B2A8792528E42010" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EF716333BCC25F18B2A8792528E42010" xlink:to="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EF716333BCC25F18B2A8792528E42010" xlink:type="arc" />
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_C55D3A5DD6FB1DE930508C93FCC887B1_negatedLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_6509386F50245459A919AA7B6D74B17D" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_C55D3A5DD6FB1DE930508C93FCC887B1_label_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_6509386F50245459A919AA7B6D74B17D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability, Defined Benefit Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_6509386F50245459A919AA7B6D74B17D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_6509386F50245459A919AA7B6D74B17D" xlink:to="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_6509386F50245459A919AA7B6D74B17D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_F999D3CF4A64B48067018C93FCC815B5_totalLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_C2944CEE6DA553008A447C1432EF9E4E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net pension liability, end of year</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_F999D3CF4A64B48067018C93FCC815B5_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_C2944CEE6DA553008A447C1432EF9E4E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_C2944CEE6DA553008A447C1432EF9E4E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_C2944CEE6DA553008A447C1432EF9E4E" xlink:to="lab_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_C2944CEE6DA553008A447C1432EF9E4E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_BA302DD3EE9FBF4D463E8C93FCC8BA03_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_908612CA8D955087A8AF652909F6CA03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_BA302DD3EE9FBF4D463E8C93FCC8BA03_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_908612CA8D955087A8AF652909F6CA03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_908612CA8D955087A8AF652909F6CA03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_908612CA8D955087A8AF652909F6CA03" xlink:to="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_908612CA8D955087A8AF652909F6CA03" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_B024C30164DD558CC71B8C93FCC82467_negatedLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_171BA00F5DE6537F8B35B76A0555ED06" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net actuarial loss</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_B024C30164DD558CC71B8C93FCC82467_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_171BA00F5DE6537F8B35B76A0555ED06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_171BA00F5DE6537F8B35B76A0555ED06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_171BA00F5DE6537F8B35B76A0555ED06" xlink:to="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_171BA00F5DE6537F8B35B76A0555ED06" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_C111B29232AAF02FF4658C93FCC95219_totalLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_54B1581710765A7780E5FB39951BE771" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_C111B29232AAF02FF4658C93FCC95219_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_54B1581710765A7780E5FB39951BE771" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_54B1581710765A7780E5FB39951BE771" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_54B1581710765A7780E5FB39951BE771" xlink:to="lab_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_54B1581710765A7780E5FB39951BE771" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_0628DC6713E38621F6D18C93FCC9CACA_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_B0B42675494C5E6CB39B83FCF1E97DBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted-Average Liability Asumptions</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_0628DC6713E38621F6D18C93FCC9CACA_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_B0B42675494C5E6CB39B83FCF1E97DBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_B0B42675494C5E6CB39B83FCF1E97DBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_B0B42675494C5E6CB39B83FCF1E97DBB" xlink:to="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_B0B42675494C5E6CB39B83FCF1E97DBB" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_565EB1D5B5D13BF0E8288C93FCCBF66C_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_D2781E67D8B75E04BC71096F88B0CB41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated benefit obligation</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_565EB1D5B5D13BF0E8288C93FCCBF66C_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_D2781E67D8B75E04BC71096F88B0CB41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Accumulated Benefit Obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_D2781E67D8B75E04BC71096F88B0CB41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_D2781E67D8B75E04BC71096F88B0CB41" xlink:to="lab_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_D2781E67D8B75E04BC71096F88B0CB41" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_BB4D66BB454981B2008C8C93FCCAB850_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_F5433C2645DF56DEAEC0AD73621A9196" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discount rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_F5433C2645DF56DEAEC0AD73621A9196" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_F5433C2645DF56DEAEC0AD73621A9196" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_F5433C2645DF56DEAEC0AD73621A9196" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_A267E4F7747AFD3CEB94A02D43006F1B_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_430A0BC75C8C5F3383040A3C969A6A89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of The Number Of Securities In An Unrealized Unrecognized Loss Position [Table]</link:label>
    <link:label id="lab_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_A267E4F7747AFD3CEB94A02D43006F1B_label_en-US" xlink:label="lab_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_430A0BC75C8C5F3383040A3C969A6A89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of The Number Of Securities In An Unrealized Unrecognized Loss Position [Table]</link:label>
    <link:label id="lab_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_A267E4F7747AFD3CEB94A02D43006F1B_documentation_en-US" xlink:label="lab_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_430A0BC75C8C5F3383040A3C969A6A89" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure showing the number of held-to-maturity and available-for-sale securities in an unrealized/unrecognized loss position by percentage of market value compared to book value and the related unrealized/unrecognized loss amount.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable" xlink:label="loc_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_430A0BC75C8C5F3383040A3C969A6A89" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_430A0BC75C8C5F3383040A3C969A6A89" xlink:to="lab_sigi_ScheduleOfNumberOfSecuritiesInUnrealizedUnrecognizedLossPositionTable_430A0BC75C8C5F3383040A3C969A6A89" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_7037883DD8BC79429FB7A02D4302D975_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_642613B9CAEA5624AE48C622403C803A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value and Gross Pre Tax Unrealized Unrecognized Loss of Securities By Length of Time [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_7037883DD8BC79429FB7A02D4302D975_label_en-US" xlink:label="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_642613B9CAEA5624AE48C622403C803A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value and Gross Pre Tax Unrealized Unrecognized Loss of Securities By Length of Time [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_7037883DD8BC79429FB7A02D4302D975_documentation_en-US" xlink:label="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_642613B9CAEA5624AE48C622403C803A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the types of investments in an unrealized/unrecognized loss position by category.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis" xlink:label="loc_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_642613B9CAEA5624AE48C622403C803A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_642613B9CAEA5624AE48C622403C803A" xlink:to="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeAxis_642613B9CAEA5624AE48C622403C803A" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_46E05EE97712B96BF824A02D4302AF6B_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_277DE18921A15FEABB61A195D40D3B9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Fair Value And Gross Pre Tax Unrealized Unrecognized Loss Of Securities By Length Of Time [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_46E05EE97712B96BF824A02D4302AF6B_label_en-US" xlink:label="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_277DE18921A15FEABB61A195D40D3B9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Fair Value And Gross Pre Tax Unrealized Unrecognized Loss Of Securities By Length Of Time [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_46E05EE97712B96BF824A02D4302AF6B_documentation_en-US" xlink:label="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_277DE18921A15FEABB61A195D40D3B9D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Provides general categories of securities that are in a continuous loss position.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain" xlink:label="loc_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_277DE18921A15FEABB61A195D40D3B9D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_277DE18921A15FEABB61A195D40D3B9D" xlink:to="lab_sigi_ScheduleOfFairValueAndGrossPreTaxUnrealizedUnrecognizedLossOfSecuritiesByLengthOfTimeDomain_277DE18921A15FEABB61A195D40D3B9D" xlink:type="arc" />
    <link:label id="lab_sigi_AfsFixedMaturitySecuritiesMember_F9C29DB6D615DCDAB673A02D430329A3_terseLabel_en-US" xlink:label="lab_sigi_AfsFixedMaturitySecuritiesMember_8BCF6B89740F58EFB493FC6267A8B5A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">AFS Fixed Maturity Securities [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AfsFixedMaturitySecuritiesMember" xlink:label="loc_sigi_AfsFixedMaturitySecuritiesMember_8BCF6B89740F58EFB493FC6267A8B5A2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AfsFixedMaturitySecuritiesMember_8BCF6B89740F58EFB493FC6267A8B5A2" xlink:to="lab_sigi_AfsFixedMaturitySecuritiesMember_8BCF6B89740F58EFB493FC6267A8B5A2" xlink:type="arc" />
    <link:label id="lab_sigi_PercentageDeclineInFairValuePercentage_CFF9CD00C7E35AF996F5A02D43030A81_terseLabel_en-US" xlink:label="lab_sigi_PercentageDeclineInFairValuePercentage_D83CE799E548593CB4AFDEE85D9CCAEE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage Decline in Fair Value Percentage of Amortized Cost</link:label>
    <link:label id="lab_sigi_PercentageDeclineInFairValuePercentage_CFF9CD00C7E35AF996F5A02D43030A81_label_en-US" xlink:label="lab_sigi_PercentageDeclineInFairValuePercentage_D83CE799E548593CB4AFDEE85D9CCAEE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Decline in Fair Value Percentage</link:label>
    <link:label id="lab_sigi_PercentageDeclineInFairValuePercentage_CFF9CD00C7E35AF996F5A02D43030A81_documentation_en-US" xlink:label="lab_sigi_PercentageDeclineInFairValuePercentage_D83CE799E548593CB4AFDEE85D9CCAEE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the percentage decline in fair value of fixed maturity securities compared to amortized cost that have been in a loss position for more than twelve months. This impairment has been determined to be temporary.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PercentageDeclineInFairValuePercentage" xlink:label="loc_sigi_PercentageDeclineInFairValuePercentage_D83CE799E548593CB4AFDEE85D9CCAEE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PercentageDeclineInFairValuePercentage_D83CE799E548593CB4AFDEE85D9CCAEE" xlink:to="lab_sigi_PercentageDeclineInFairValuePercentage_D83CE799E548593CB4AFDEE85D9CCAEE" xlink:type="arc" />
    <link:label id="lab_sigi_UnrealizedUnrecognizedLoss_B75B9995DF9BD2684E3EA02D430452AF_terseLabel_en-US" xlink:label="lab_sigi_UnrealizedUnrecognizedLoss_B848DFCB99C75900B2BF59482926B106" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Accumulated Unrecognized Holding Loss</link:label>
    <link:label id="lab_sigi_UnrealizedUnrecognizedLoss_B75B9995DF9BD2684E3EA02D430452AF_label_en-US" xlink:label="lab_sigi_UnrealizedUnrecognizedLoss_B848DFCB99C75900B2BF59482926B106" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Unrecognized Loss</link:label>
    <link:label id="lab_sigi_UnrealizedUnrecognizedLoss_B75B9995DF9BD2684E3EA02D430452AF_documentation_en-US" xlink:label="lab_sigi_UnrealizedUnrecognizedLoss_B848DFCB99C75900B2BF59482926B106" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the sum of (i) the excess of amortized cost over fair value for available-for-sale securities that are in a loss position and (ii) the market fluctuations on held-to-maturity securities from the later of (a) the date a security is designated as held-to-maturity; or (b) the date that an other-than-temporary impairment charge is recognized on a held-to-maturity security for securities that are in an unrecognized loss position.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnrealizedUnrecognizedLoss" xlink:label="loc_sigi_UnrealizedUnrecognizedLoss_B848DFCB99C75900B2BF59482926B106" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnrealizedUnrecognizedLoss_B848DFCB99C75900B2BF59482926B106" xlink:to="lab_sigi_UnrealizedUnrecognizedLoss_B848DFCB99C75900B2BF59482926B106" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_F03D14385AE2275DE9EBA02D4303EC7C_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_BE1F904A8673538FB9E4B805B15F1465" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_F03D14385AE2275DE9EBA02D4303EC7C_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_BE1F904A8673538FB9E4B805B15F1465" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_BE1F904A8673538FB9E4B805B15F1465" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_BE1F904A8673538FB9E4B805B15F1465" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_BE1F904A8673538FB9E4B805B15F1465" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_0E1F47F145F391F76D32A02D4304E7FF_negatedLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_8B8410AB77AE5359BA131673067D8F01" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_0E1F47F145F391F76D32A02D4304E7FF_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_8B8410AB77AE5359BA131673067D8F01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_8B8410AB77AE5359BA131673067D8F01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_8B8410AB77AE5359BA131673067D8F01" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_8B8410AB77AE5359BA131673067D8F01" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_F845333C70A2BB6E1F60A02D43045ABD_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_332F88265A9559B6B0DFE10C219455E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_F845333C70A2BB6E1F60A02D43045ABD_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_332F88265A9559B6B0DFE10C219455E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_332F88265A9559B6B0DFE10C219455E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_332F88265A9559B6B0DFE10C219455E5" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_332F88265A9559B6B0DFE10C219455E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_E66D5903A73D22241402A02D4304010F_negatedLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_59645A10DD2C55E59950C0C6C1096CD7" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_E66D5903A73D22241402A02D4304010F_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_59645A10DD2C55E59950C0C6C1096CD7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_59645A10DD2C55E59950C0C6C1096CD7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_59645A10DD2C55E59950C0C6C1096CD7" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_59645A10DD2C55E59950C0C6C1096CD7" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_F014503AD177F0B557ADA02D4304CB6D_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_276107D847DE5340B1CE3CB2741AB8CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Total Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_F014503AD177F0B557ADA02D4304CB6D_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_276107D847DE5340B1CE3CB2741AB8CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_276107D847DE5340B1CE3CB2741AB8CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_276107D847DE5340B1CE3CB2741AB8CA" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_276107D847DE5340B1CE3CB2741AB8CA" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_AC47DE32A3CDF6BF2048A02D43045CEC_negatedLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_6BC12AFD87D2558192AAB313730BD994" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_AC47DE32A3CDF6BF2048A02D43045CEC_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_6BC12AFD87D2558192AAB313730BD994" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_6BC12AFD87D2558192AAB313730BD994" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_6BC12AFD87D2558192AAB313730BD994" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_6BC12AFD87D2558192AAB313730BD994" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_A1385925A10630B9E2DB101EE679CFCA_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract_C3A13FF2DB395BD683FA3EC2B390A0B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract_C3A13FF2DB395BD683FA3EC2B390A0B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_C3A13FF2DB395BD683FA3EC2B390A0B3" xlink:to="lab_us-gaap_StatementOfStockholdersEquityAbstract_C3A13FF2DB395BD683FA3EC2B390A0B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SeriesAPreferredStockMember_481415D7D87360E163A2101EE6792418_terseLabel_en-US" xlink:label="lab_us-gaap_SeriesAPreferredStockMember_A50BE352263F512FAD30001036D2B025" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Series A Preferred Stock [Member]</link:label>
    <link:label id="lab_us-gaap_SeriesAPreferredStockMember_481415D7D87360E163A2101EE6792418_label_en-US" xlink:label="lab_us-gaap_SeriesAPreferredStockMember_A50BE352263F512FAD30001036D2B025" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series A Preferred Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeriesAPreferredStockMember" xlink:label="loc_us-gaap_SeriesAPreferredStockMember_A50BE352263F512FAD30001036D2B025" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeriesAPreferredStockMember_A50BE352263F512FAD30001036D2B025" xlink:to="lab_us-gaap_SeriesAPreferredStockMember_A50BE352263F512FAD30001036D2B025" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_B681E5A5E359A8AB1840101EE679990F_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_E40EDAC995F9573DB121689E03D9A545" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividend reinvestment plan, shares</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_B681E5A5E359A8AB1840101EE679990F_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_E40EDAC995F9573DB121689E03D9A545" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Dividend Reinvestment Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_E40EDAC995F9573DB121689E03D9A545" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_E40EDAC995F9573DB121689E03D9A545" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_E40EDAC995F9573DB121689E03D9A545" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_284F82DCD943CF50038F101EE679CEC8_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2BE68BAE2D805ECCAA6FCBA014565F5D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock purchase and compensation plans, shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2BE68BAE2D805ECCAA6FCBA014565F5D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2BE68BAE2D805ECCAA6FCBA014565F5D" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2BE68BAE2D805ECCAA6FCBA014565F5D" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_522255EA79B98E0CA864101EE6793DC3_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_A41E90C3873F5421B5A1ABC4210438CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends to stockholders, per share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_A41E90C3873F5421B5A1ABC4210438CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareDeclared_A41E90C3873F5421B5A1ABC4210438CB" xlink:to="lab_us-gaap_CommonStockDividendsPerShareDeclared_A41E90C3873F5421B5A1ABC4210438CB" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockSharesAcquired_A28B9508B533F8DE39C2101EE679389F_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockSharesAcquired_3A2BEA1379245BD6ACD5A37A4A0663ED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of treasury stock, shares</link:label>
    <link:label id="lab_us-gaap_TreasuryStockSharesAcquired_A28B9508B533F8DE39C2101EE679389F_label_en-US" xlink:label="lab_us-gaap_TreasuryStockSharesAcquired_3A2BEA1379245BD6ACD5A37A4A0663ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Shares, Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_3A2BEA1379245BD6ACD5A37A4A0663ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockSharesAcquired_3A2BEA1379245BD6ACD5A37A4A0663ED" xlink:to="lab_us-gaap_TreasuryStockSharesAcquired_3A2BEA1379245BD6ACD5A37A4A0663ED" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_51C4447BAAB42A36B820101EE433717D_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_1942D601C4825C9CB3DA7AA3816E720D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Income Taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_51C4447BAAB42A36B820101EE433717D_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_1942D601C4825C9CB3DA7AA3816E720D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_1942D601C4825C9CB3DA7AA3816E720D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureTextBlock_1942D601C4825C9CB3DA7AA3816E720D" xlink:to="lab_us-gaap_IncomeTaxDisclosureTextBlock_1942D601C4825C9CB3DA7AA3816E720D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_E4236916AF8115614B0E101EE3D223F4_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_D54C0E54DDC4516B8ACA53E53BB07B18" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurements</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_E4236916AF8115614B0E101EE3D223F4_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_D54C0E54DDC4516B8ACA53E53BB07B18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_D54C0E54DDC4516B8ACA53E53BB07B18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresTextBlock_D54C0E54DDC4516B8ACA53E53BB07B18" xlink:to="lab_us-gaap_FairValueDisclosuresTextBlock_D54C0E54DDC4516B8ACA53E53BB07B18" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinimumMember_9E028A01976BFF781D7AA04F730304A2_terseLabel_en-US" xlink:label="lab_us-gaap_MinimumMember_14448042927851C89B216753FBE9FD8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:label id="lab_us-gaap_MinimumMember_9E028A01976BFF781D7AA04F730304A2_label_en-US" xlink:label="lab_us-gaap_MinimumMember_14448042927851C89B216753FBE9FD8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_14448042927851C89B216753FBE9FD8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinimumMember_14448042927851C89B216753FBE9FD8B" xlink:to="lab_us-gaap_MinimumMember_14448042927851C89B216753FBE9FD8B" xlink:type="arc" />
    <link:label id="lab_us-gaap_MaximumMember_106E7A959B4FEEC409D7A04F73032E8B_terseLabel_en-US" xlink:label="lab_us-gaap_MaximumMember_C1638B16217256939650A698735E566B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:label id="lab_us-gaap_MaximumMember_106E7A959B4FEEC409D7A04F73032E8B_label_en-US" xlink:label="lab_us-gaap_MaximumMember_C1638B16217256939650A698735E566B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_C1638B16217256939650A698735E566B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaximumMember_C1638B16217256939650A698735E566B" xlink:to="lab_us-gaap_MaximumMember_C1638B16217256939650A698735E566B" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementScenarioAxis_ACB7B5B3E601B935198FA04F73036C29_verboseLabel_en-US" xlink:label="lab_us-gaap_StatementScenarioAxis_AD4ECE31CB48581DAFB7DC740A237AB7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Statement, Scenario [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_AD4ECE31CB48581DAFB7DC740A237AB7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementScenarioAxis_AD4ECE31CB48581DAFB7DC740A237AB7" xlink:to="lab_us-gaap_StatementScenarioAxis_AD4ECE31CB48581DAFB7DC740A237AB7" xlink:type="arc" />
    <link:label id="lab_sigi_ReturnSeekingAssetsMember_0464E31667BA05237C50A04F730374BA_verboseLabel_en-US" xlink:label="lab_sigi_ReturnSeekingAssetsMember_681427B23B4E5140806ACC5FE38805FF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Return Seeking Assets [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ReturnSeekingAssetsMember" xlink:label="loc_sigi_ReturnSeekingAssetsMember_681427B23B4E5140806ACC5FE38805FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ReturnSeekingAssetsMember_681427B23B4E5140806ACC5FE38805FF" xlink:to="lab_sigi_ReturnSeekingAssetsMember_681427B23B4E5140806ACC5FE38805FF" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanTargetAllocationPercentage_67CE9F21F4B90E3C9998A04F73044164_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanTargetAllocationPercentage_EB05453CC86B54E1BCDD81D39320F337" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Target Allocation Percentage</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanTargetAllocationPercentage_67CE9F21F4B90E3C9998A04F73044164_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanTargetAllocationPercentage_EB05453CC86B54E1BCDD81D39320F337" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Target Allocation Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanTargetAllocationPercentage" xlink:label="loc_us-gaap_DefinedBenefitPlanTargetAllocationPercentage_EB05453CC86B54E1BCDD81D39320F337" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanTargetAllocationPercentage_EB05453CC86B54E1BCDD81D39320F337" xlink:to="lab_us-gaap_DefinedBenefitPlanTargetAllocationPercentage_EB05453CC86B54E1BCDD81D39320F337" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_9A19E57362724A5D0CFAA04F7304A1F9_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_108246D90E065B8AB477AF40F47FE1DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Actual percentage</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_9A19E57362724A5D0CFAA04F7304A1F9_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_108246D90E065B8AB477AF40F47FE1DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Actual Plan Asset Allocations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_108246D90E065B8AB477AF40F47FE1DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_108246D90E065B8AB477AF40F47FE1DB" xlink:to="lab_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_108246D90E065B8AB477AF40F47FE1DB" xlink:type="arc" />
    <link:label id="lab_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_832F9302252467082293A04F7304A2BE_terseLabel_en-US" xlink:label="lab_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_6E66D205EA4C5E77B29983CED8656980" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum percentage of equity security value of total plans portfolio value that is allowed</link:label>
    <link:label id="lab_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_832F9302252467082293A04F7304A2BE_label_en-US" xlink:label="lab_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_6E66D205EA4C5E77B29983CED8656980" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Percentage Of Any Security Value Of Total Plans Portfolio Vaue That Is Allowed</link:label>
    <link:label id="lab_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_832F9302252467082293A04F7304A2BE_documentation_en-US" xlink:label="lab_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_6E66D205EA4C5E77B29983CED8656980" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum percentage of any individual security value of the total Retirement Income Plan's portfolio value that is allowed.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed" xlink:label="loc_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_6E66D205EA4C5E77B29983CED8656980" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_6E66D205EA4C5E77B29983CED8656980" xlink:to="lab_sigi_MaximumPercentageOfAnySecurityValueOfTotalPlansPortfolioVaueThatIsAllowed_6E66D205EA4C5E77B29983CED8656980" xlink:type="arc" />
    <link:label id="lab_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_8F44B22E7EAAEEDF0200A04F73046855_terseLabel_en-US" xlink:label="lab_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_BA7BC3DDD5C6547081E5FDAA67F09639" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum percentage of any corporation outstanding shares that is allowed for retirement income plan equity portfolio</link:label>
    <link:label id="lab_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_8F44B22E7EAAEEDF0200A04F73046855_label_en-US" xlink:label="lab_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_BA7BC3DDD5C6547081E5FDAA67F09639" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Percentage Of Any Corporation Outstanding Shares That Is Allowed For Retirement Income Plan</link:label>
    <link:label id="lab_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_8F44B22E7EAAEEDF0200A04F73046855_documentation_en-US" xlink:label="lab_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_BA7BC3DDD5C6547081E5FDAA67F09639" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum percentage of outstanding shares of any one corporation that is allowed for the Retirement Income Plan.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan" xlink:label="loc_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_BA7BC3DDD5C6547081E5FDAA67F09639" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_BA7BC3DDD5C6547081E5FDAA67F09639" xlink:to="lab_sigi_MaximumPercentageOfAnyCorporationOutstandingSharesThatIsAllowedForRetirementIncomePlan_BA7BC3DDD5C6547081E5FDAA67F09639" xlink:type="arc" />
    <link:label id="lab_sigi_DisclosureofRetiredPlansAbstract_1F9A43A67304A4DE616D101EE67F09DA_label_en-US" xlink:label="lab_sigi_DisclosureofRetiredPlansAbstract_1D6C8F546DE956F48256CF5C1E4A0D00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Retired Plans [Abstract]</link:label>
    <link:label id="lab_sigi_DisclosureofRetiredPlansAbstract_1F9A43A67304A4DE616D101EE67F09DA_documentation_en-US" xlink:label="lab_sigi_DisclosureofRetiredPlansAbstract_1D6C8F546DE956F48256CF5C1E4A0D00" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of Retired Plans [Abstract]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DisclosureofRetiredPlansAbstract" xlink:label="loc_sigi_DisclosureofRetiredPlansAbstract_1D6C8F546DE956F48256CF5C1E4A0D00" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DisclosureofRetiredPlansAbstract_1D6C8F546DE956F48256CF5C1E4A0D00" xlink:to="lab_sigi_DisclosureofRetiredPlansAbstract_1D6C8F546DE956F48256CF5C1E4A0D00" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_9713AEE82364613F2AB1101EE67F7C8E_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_F09C3860026F51AFB8419ADFB97171AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Retired Plans [Table]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_9713AEE82364613F2AB1101EE67F7C8E_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_F09C3860026F51AFB8419ADFB97171AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Retired Plans [Table]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_9713AEE82364613F2AB1101EE67F7C8E_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_F09C3860026F51AFB8419ADFB97171AE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of Schedule of Share-Based Compensation Retired Plans.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationRetiredPlansTable" xlink:label="loc_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_F09C3860026F51AFB8419ADFB97171AE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_F09C3860026F51AFB8419ADFB97171AE" xlink:to="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansTable_F09C3860026F51AFB8419ADFB97171AE" xlink:type="arc" />
    <link:label id="lab_sigi_StockOptionShareBasedCompensationMember_D9459EF86E3128DE330F101EE67FCEFC_terseLabel_en-US" xlink:label="lab_sigi_StockOptionShareBasedCompensationMember_0850C169E5965085BF0C6A595D0FE62C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Option Share Based Compensation [Member]</link:label>
    <link:label id="lab_sigi_StockOptionShareBasedCompensationMember_D9459EF86E3128DE330F101EE67FCEFC_label_en-US" xlink:label="lab_sigi_StockOptionShareBasedCompensationMember_0850C169E5965085BF0C6A595D0FE62C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Option Share Based Compensation [Member]</link:label>
    <link:label id="lab_sigi_StockOptionShareBasedCompensationMember_D9459EF86E3128DE330F101EE67FCEFC_documentation_en-US" xlink:label="lab_sigi_StockOptionShareBasedCompensationMember_0850C169E5965085BF0C6A595D0FE62C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A contract that gives the holder the right, but not the obligation, either to purchase or to sell a certain number of shares of stock at a predetermined price for a specified period of time.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StockOptionShareBasedCompensationMember" xlink:label="loc_sigi_StockOptionShareBasedCompensationMember_0850C169E5965085BF0C6A595D0FE62C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StockOptionShareBasedCompensationMember_0850C169E5965085BF0C6A595D0FE62C" xlink:to="lab_sigi_StockOptionShareBasedCompensationMember_0850C169E5965085BF0C6A595D0FE62C" xlink:type="arc" />
    <link:label id="lab_us-gaap_PlanNameAxis_C8D04744F80A9C6B0240101EE67F7250_terseLabel_en-US" xlink:label="lab_us-gaap_PlanNameAxis_D248FD36B5275B50B5BA75E0A4FC7C3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Plan Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_D248FD36B5275B50B5BA75E0A4FC7C3D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PlanNameAxis_D248FD36B5275B50B5BA75E0A4FC7C3D" xlink:to="lab_us-gaap_PlanNameAxis_D248FD36B5275B50B5BA75E0A4FC7C3D" xlink:type="arc" />
    <link:label id="lab_sigi_Omnibus2005StockPlanMember_D5713B25C858B1250F53101EE6805133_terseLabel_en-US" xlink:label="lab_sigi_Omnibus2005StockPlanMember_E52D3C154E25504CB7717BABD3EDDC7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Omnibus Stock Plan [Member]</link:label>
    <link:label id="lab_sigi_Omnibus2005StockPlanMember_D5713B25C858B1250F53101EE6805133_label_en-US" xlink:label="lab_sigi_Omnibus2005StockPlanMember_E52D3C154E25504CB7717BABD3EDDC7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Omnibus 2005 Stock Plan [Member]</link:label>
    <link:label id="lab_sigi_Omnibus2005StockPlanMember_D5713B25C858B1250F53101EE6805133_documentation_en-US" xlink:label="lab_sigi_Omnibus2005StockPlanMember_E52D3C154E25504CB7717BABD3EDDC7D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">An equity-based payment arrangement in which one or more employees receive shares of stock (units), stock (unit) options, phantom stock, stock bonuses, stock appreciation rights, or other equity instruments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_Omnibus2005StockPlanMember" xlink:label="loc_sigi_Omnibus2005StockPlanMember_E52D3C154E25504CB7717BABD3EDDC7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_Omnibus2005StockPlanMember_E52D3C154E25504CB7717BABD3EDDC7D" xlink:to="lab_sigi_Omnibus2005StockPlanMember_E52D3C154E25504CB7717BABD3EDDC7D" xlink:type="arc" />
    <link:label id="lab_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_CEF3921C630728004EF4101EE6805774_terseLabel_en-US" xlink:label="lab_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_AB0E18E8ADC555F6BFE17688EA4E25AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Compensation Plan For Non Employee Directors [Member]</link:label>
    <link:label id="lab_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_CEF3921C630728004EF4101EE6805774_label_en-US" xlink:label="lab_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_AB0E18E8ADC555F6BFE17688EA4E25AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Compensation Plan For Non Employee Directors [Member]</link:label>
    <link:label id="lab_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_CEF3921C630728004EF4101EE6805774_documentation_en-US" xlink:label="lab_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_AB0E18E8ADC555F6BFE17688EA4E25AD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A share-based payment arrangement in which non-employee directors could elect to receive a portion of their annual compensation in shares of the Parent's common stock.  Future grants under this plan ceased being available on April 27, 2005.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_StockCompensationPlanForNonEmployeeDirectorsMember" xlink:label="loc_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_AB0E18E8ADC555F6BFE17688EA4E25AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_AB0E18E8ADC555F6BFE17688EA4E25AD" xlink:to="lab_sigi_StockCompensationPlanForNonEmployeeDirectorsMember_AB0E18E8ADC555F6BFE17688EA4E25AD" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_CCDF8E5DD0733A72BE9C101EE68005A1_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_DC7F7423876B531EBF24E3F2325DF009" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Retired Plans [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_CCDF8E5DD0733A72BE9C101EE68005A1_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_DC7F7423876B531EBF24E3F2325DF009" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Retired Plans [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_CCDF8E5DD0733A72BE9C101EE68005A1_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_DC7F7423876B531EBF24E3F2325DF009" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Line Items] for Tabular disclosure of Schedule of Share-Based Compensation Retired Plans.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems" xlink:label="loc_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_DC7F7423876B531EBF24E3F2325DF009" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_DC7F7423876B531EBF24E3F2325DF009" xlink:to="lab_sigi_ScheduleofShareBasedCompensationRetiredPlansLineItems_DC7F7423876B531EBF24E3F2325DF009" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_3E7ECE785C41235F3185101EE6801659_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_73B959CA4C7B59E48B17B4BB163804C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_3E7ECE785C41235F3185101EE6801659_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_73B959CA4C7B59E48B17B4BB163804C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_73B959CA4C7B59E48B17B4BB163804C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_73B959CA4C7B59E48B17B4BB163804C4" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_73B959CA4C7B59E48B17B4BB163804C4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_2A04716C8263E7D9BEF0101EE68092E4_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_7076524B78FF51B39CB29DDCF968B523" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_2A04716C8263E7D9BEF0101EE68092E4_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_7076524B78FF51B39CB29DDCF968B523" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_7076524B78FF51B39CB29DDCF968B523" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_7076524B78FF51B39CB29DDCF968B523" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_7076524B78FF51B39CB29DDCF968B523" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_A808AE0B41C49E158825B0BDD9518B43_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_9D3764B795555BAFA06A13C889927CE0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue from External Customers by Products and Services [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_A808AE0B41C49E158825B0BDD9518B43_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_9D3764B795555BAFA06A13C889927CE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from External Customers by Products and Services [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_9D3764B795555BAFA06A13C889927CE0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_9D3764B795555BAFA06A13C889927CE0" xlink:to="lab_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_9D3764B795555BAFA06A13C889927CE0" xlink:type="arc" />
    <link:label id="lab_sigi_LineOfBusinessBySegmentAxis_F4DE97C3CE7743BDBA9AB0BDD9519C26_verboseLabel_en-US" xlink:label="lab_sigi_LineOfBusinessBySegmentAxis_BE35A132724A579F88CB97E75B44EFD8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Line Of Business By Segment [Axis]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_LineOfBusinessBySegmentAxis" xlink:label="loc_sigi_LineOfBusinessBySegmentAxis_BE35A132724A579F88CB97E75B44EFD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_LineOfBusinessBySegmentAxis_BE35A132724A579F88CB97E75B44EFD8" xlink:to="lab_sigi_LineOfBusinessBySegmentAxis_BE35A132724A579F88CB97E75B44EFD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_C1A00D49D3796AF08695B0BDD9511016_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_AC7C9E9885EB54AF8B7A82864D56427F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Standard Personal Lines [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember" xlink:label="loc_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_AC7C9E9885EB54AF8B7A82864D56427F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_AC7C9E9885EB54AF8B7A82864D56427F" xlink:to="lab_us-gaap_PropertyAndCasualtyPersonalInsuranceProductLineMember_AC7C9E9885EB54AF8B7A82864D56427F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_03669E82230B7DFA0CADB0BDD951D09C_verboseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_1C075D9F46545905AB2AD30E7ECAE9CB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Business Segments [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_1C075D9F46545905AB2AD30E7ECAE9CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_1C075D9F46545905AB2AD30E7ECAE9CB" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis_1C075D9F46545905AB2AD30E7ECAE9CB" xlink:type="arc" />
    <link:label id="lab_us-gaap_SuretySegmentMember_6B45508D130780693042B0BDD9517522_terseLabel_en-US" xlink:label="lab_us-gaap_SuretySegmentMember_4736B34BA9F65DDBBB4ADF16523F7043" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bonds Segment [Member]</link:label>
    <link:label id="lab_us-gaap_SuretySegmentMember_6B45508D130780693042B0BDD9517522_label_en-US" xlink:label="lab_us-gaap_SuretySegmentMember_4736B34BA9F65DDBBB4ADF16523F7043" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Surety Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SuretySegmentMember" xlink:label="loc_us-gaap_SuretySegmentMember_4736B34BA9F65DDBBB4ADF16523F7043" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SuretySegmentMember_4736B34BA9F65DDBBB4ADF16523F7043" xlink:to="lab_us-gaap_SuretySegmentMember_4736B34BA9F65DDBBB4ADF16523F7043" xlink:type="arc" />
    <link:label id="lab_sigi_TotalCommercialLinesMember_BC929BB512192FCA81C7B0BDD9513C0F_terseLabel_en-US" xlink:label="lab_sigi_TotalCommercialLinesMember_06C58ED733845D9DB8D6498D9860F347" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Standard Commercial Lines [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalCommercialLinesMember" xlink:label="loc_sigi_TotalCommercialLinesMember_06C58ED733845D9DB8D6498D9860F347" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalCommercialLinesMember_06C58ED733845D9DB8D6498D9860F347" xlink:to="lab_sigi_TotalCommercialLinesMember_06C58ED733845D9DB8D6498D9860F347" xlink:type="arc" />
    <link:label id="lab_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_CF2978CCAF65ACBBABD8B0BDD9611A2F_terseLabel_en-US" xlink:label="lab_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_BAE699A8DD205FF891C4DA525E9B335E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue from External Customer [Line Items]</link:label>
    <link:label id="lab_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_CF2978CCAF65ACBBABD8B0BDD9611A2F_label_en-US" xlink:label="lab_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_BAE699A8DD205FF891C4DA525E9B335E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from External Customer [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_BAE699A8DD205FF891C4DA525E9B335E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_BAE699A8DD205FF891C4DA525E9B335E" xlink:to="lab_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_BAE699A8DD205FF891C4DA525E9B335E" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentHoldingsTable_884521A4DA82EACA58E5101EE45E3C8A_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentHoldingsTable_8A4547389C2B5BB4BAADA938E13D627D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Holdings [Table]</link:label>
    <link:label id="lab_us-gaap_InvestmentHoldingsTable_884521A4DA82EACA58E5101EE45E3C8A_label_en-US" xlink:label="lab_us-gaap_InvestmentHoldingsTable_8A4547389C2B5BB4BAADA938E13D627D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Holdings [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentHoldingsTable" xlink:label="loc_us-gaap_InvestmentHoldingsTable_8A4547389C2B5BB4BAADA938E13D627D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentHoldingsTable_8A4547389C2B5BB4BAADA938E13D627D" xlink:to="lab_us-gaap_InvestmentHoldingsTable_8A4547389C2B5BB4BAADA938E13D627D" xlink:type="arc" />
    <link:label id="lab_us-gaap_PrivateEquityFundsMember_A235E5F4AA5B484E3E19101EE45EFDB2_terseLabel_en-US" xlink:label="lab_us-gaap_PrivateEquityFundsMember_7F97321131BC5610A9065C2152FD1860" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Private Equity [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrivateEquityFundsMember" xlink:label="loc_us-gaap_PrivateEquityFundsMember_7F97321131BC5610A9065C2152FD1860" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrivateEquityFundsMember_7F97321131BC5610A9065C2152FD1860" xlink:to="lab_us-gaap_PrivateEquityFundsMember_7F97321131BC5610A9065C2152FD1860" xlink:type="arc" />
    <link:label id="lab_sigi_OtherSecuritiesMember_EF0280F0AB9CCB266D3A101EE45E5BC1_terseLabel_en-US" xlink:label="lab_sigi_OtherSecuritiesMember_120C8230827954F3BEBE060E74169430" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Securities [Member]</link:label>
    <link:label id="lab_sigi_OtherSecuritiesMember_EF0280F0AB9CCB266D3A101EE45E5BC1_label_en-US" xlink:label="lab_sigi_OtherSecuritiesMember_120C8230827954F3BEBE060E74169430" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Securities [Member]</link:label>
    <link:label id="lab_sigi_OtherSecuritiesMember_EF0280F0AB9CCB266D3A101EE45E5BC1_documentation_en-US" xlink:label="lab_sigi_OtherSecuritiesMember_120C8230827954F3BEBE060E74169430" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents all other other securities not otherwise specified.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OtherSecuritiesMember" xlink:label="loc_sigi_OtherSecuritiesMember_120C8230827954F3BEBE060E74169430" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OtherSecuritiesMember_120C8230827954F3BEBE060E74169430" xlink:to="lab_sigi_OtherSecuritiesMember_120C8230827954F3BEBE060E74169430" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherInvestments_4FC7926E4FF4E0BE0DE1101EE45F48DE_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherInvestments_559263CCD92A5AED970792AE5E9523DA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Carrying Value</link:label>
    <link:label id="lab_us-gaap_OtherInvestments_4FC7926E4FF4E0BE0DE1101EE45F48DE_label_en-US" xlink:label="lab_us-gaap_OtherInvestments_559263CCD92A5AED970792AE5E9523DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherInvestments" xlink:label="loc_us-gaap_OtherInvestments_559263CCD92A5AED970792AE5E9523DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherInvestments_559263CCD92A5AED970792AE5E9523DA" xlink:to="lab_us-gaap_OtherInvestments_559263CCD92A5AED970792AE5E9523DA" xlink:type="arc" />
    <link:label id="lab_sigi_RemainingCommitment_9EF9E1241396F6BFB9DB101EE45F5AF1_terseLabel_en-US" xlink:label="lab_sigi_RemainingCommitment_903E50FBCB925A5B8659FC3B9D02339D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining Commitment</link:label>
    <link:label id="lab_sigi_RemainingCommitment_9EF9E1241396F6BFB9DB101EE45F5AF1_label_en-US" xlink:label="lab_sigi_RemainingCommitment_903E50FBCB925A5B8659FC3B9D02339D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Remaining Commitment</link:label>
    <link:label id="lab_sigi_RemainingCommitment_9EF9E1241396F6BFB9DB101EE45F5AF1_documentation_en-US" xlink:label="lab_sigi_RemainingCommitment_903E50FBCB925A5B8659FC3B9D02339D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents contractual obligations to invest additional amounts on our other investment portfolio.  These additional investments may or may not be required.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RemainingCommitment" xlink:label="loc_sigi_RemainingCommitment_903E50FBCB925A5B8659FC3B9D02339D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RemainingCommitment_903E50FBCB925A5B8659FC3B9D02339D" xlink:to="lab_sigi_RemainingCommitment_903E50FBCB925A5B8659FC3B9D02339D" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_6DD9437F0C502694A1D9101EE45F5D8C_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_933B7BDD67E554228D7ADC0F7119372A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum Exposure to Loss</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_6DD9437F0C502694A1D9101EE45F5D8C_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_933B7BDD67E554228D7ADC0F7119372A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_933B7BDD67E554228D7ADC0F7119372A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_933B7BDD67E554228D7ADC0F7119372A" xlink:to="lab_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_933B7BDD67E554228D7ADC0F7119372A" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_15ACAE0B27891EBFC751101EE3C89DFB_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_BF1C2C010F1F5D8F80AB17E1D31A8C0C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_BF1C2C010F1F5D8F80AB17E1D31A8C0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_BF1C2C010F1F5D8F80AB17E1D31A8C0C" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract_BF1C2C010F1F5D8F80AB17E1D31A8C0C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_3C7F66CDE13C651CF288101EE3C95ED0_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_21294AFA4B55521283B253BB3EE61A75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Cash Flow, Supplemental Disclosures</link:label>
    <link:label id="lab_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_3C7F66CDE13C651CF288101EE3C95ED0_label_en-US" xlink:label="lab_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_21294AFA4B55521283B253BB3EE61A75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_21294AFA4B55521283B253BB3EE61A75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_21294AFA4B55521283B253BB3EE61A75" xlink:to="lab_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_21294AFA4B55521283B253BB3EE61A75" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_55EC5566E083117614A1101EE6340954_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_DB20F5DD0FD1510CA740BA93FABC2E7D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Retirement Savings Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_DB20F5DD0FD1510CA740BA93FABC2E7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_DB20F5DD0FD1510CA740BA93FABC2E7D" xlink:to="lab_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_DB20F5DD0FD1510CA740BA93FABC2E7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanContributionsByEmployer_3E16D1B8A01A4DBBF377101EE6349D24_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanContributionsByEmployer_033D48337C80576C8F8D81DCA4FD5126" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Plan Assets, Contributions by Employer</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanContributionsByEmployer_3E16D1B8A01A4DBBF377101EE6349D24_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanContributionsByEmployer_033D48337C80576C8F8D81DCA4FD5126" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Plan Assets, Contributions by Employer</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_033D48337C80576C8F8D81DCA4FD5126" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_033D48337C80576C8F8D81DCA4FD5126" xlink:to="lab_us-gaap_DefinedBenefitPlanContributionsByEmployer_033D48337C80576C8F8D81DCA4FD5126" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTable_1B026CE63C5931D3A29DB0CCCF586473_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTable_4BD91D7C764F53098512669AB9550681" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTable_1B026CE63C5931D3A29DB0CCCF586473_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTable_4BD91D7C764F53098512669AB9550681" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_4BD91D7C764F53098512669AB9550681" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTable_4BD91D7C764F53098512669AB9550681" xlink:to="lab_us-gaap_SubsequentEventTable_4BD91D7C764F53098512669AB9550681" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_19BD3DD149055DA26401B0CCCF586CD9_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_D03F397AEAAE5ABF9597E1647A26C393" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_19BD3DD149055DA26401B0CCCF586CD9_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_D03F397AEAAE5ABF9597E1647A26C393" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_D03F397AEAAE5ABF9597E1647A26C393" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_D03F397AEAAE5ABF9597E1647A26C393" xlink:to="lab_us-gaap_SubsequentEventTypeAxis_D03F397AEAAE5ABF9597E1647A26C393" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_E580A5DD054FE4116EBFB0CCCF585DAD_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_AE31401461605B5093D19E5EF4B82CB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_E580A5DD054FE4116EBFB0CCCF585DAD_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_AE31401461605B5093D19E5EF4B82CB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_AE31401461605B5093D19E5EF4B82CB6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_AE31401461605B5093D19E5EF4B82CB6" xlink:to="lab_us-gaap_SubsequentEventTypeDomain_AE31401461605B5093D19E5EF4B82CB6" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventMember_60BFBC52FF83A272D0E3B0D2DF7D3FB7_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_ADE0B0F5BB7D5275BF4906B8248CE186" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_60BFBC52FF83A272D0E3B0D2DF7D3FB7_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_ADE0B0F5BB7D5275BF4906B8248CE186" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_ADE0B0F5BB7D5275BF4906B8248CE186" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember_ADE0B0F5BB7D5275BF4906B8248CE186" xlink:to="lab_us-gaap_SubsequentEventMember_ADE0B0F5BB7D5275BF4906B8248CE186" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventLineItems_C6C52B5C74B189484DECB0CCCF58DAD4_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems_F25742F5CDDA5529ADA47FA6025960BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_C6C52B5C74B189484DECB0CCCF58DAD4_label_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems_F25742F5CDDA5529ADA47FA6025960BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_F25742F5CDDA5529ADA47FA6025960BD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventLineItems_F25742F5CDDA5529ADA47FA6025960BD" xlink:to="lab_us-gaap_SubsequentEventLineItems_F25742F5CDDA5529ADA47FA6025960BD" xlink:type="arc" />
    <link:label id="lab_sigi_NonCatastrophePropertyLosses_DF73FB851B5E538D1B38B0CCD5EA7340_terseLabel_en-US" xlink:label="lab_sigi_NonCatastrophePropertyLosses_D1F0157122715A3DAFF14CF214E44E00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non Catastrophe Property Losses</link:label>
    <link:label id="lab_sigi_NonCatastrophePropertyLosses_DF73FB851B5E538D1B38B0CCD5EA7340_label_en-US" xlink:label="lab_sigi_NonCatastrophePropertyLosses_D1F0157122715A3DAFF14CF214E44E00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non Catastrophe Property Losses</link:label>
    <link:label id="lab_sigi_NonCatastrophePropertyLosses_DF73FB851B5E538D1B38B0CCD5EA7340_documentation_en-US" xlink:label="lab_sigi_NonCatastrophePropertyLosses_D1F0157122715A3DAFF14CF214E44E00" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Property losses resulting from events other than catastrophes.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NonCatastrophePropertyLosses" xlink:label="loc_sigi_NonCatastrophePropertyLosses_D1F0157122715A3DAFF14CF214E44E00" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NonCatastrophePropertyLosses_D1F0157122715A3DAFF14CF214E44E00" xlink:to="lab_sigi_NonCatastrophePropertyLosses_D1F0157122715A3DAFF14CF214E44E00" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossFromCatastrophes_6D280E85F5A02BCF87AAB0CCD5D6BB4A_terseLabel_en-US" xlink:label="lab_us-gaap_LossFromCatastrophes_3F65BD59C4F05DB38801813BABC55218" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss from Catastrophes</link:label>
    <link:label id="lab_us-gaap_LossFromCatastrophes_6D280E85F5A02BCF87AAB0CCD5D6BB4A_label_en-US" xlink:label="lab_us-gaap_LossFromCatastrophes_3F65BD59C4F05DB38801813BABC55218" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss from Catastrophes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossFromCatastrophes" xlink:label="loc_us-gaap_LossFromCatastrophes_3F65BD59C4F05DB38801813BABC55218" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossFromCatastrophes_3F65BD59C4F05DB38801813BABC55218" xlink:to="lab_us-gaap_LossFromCatastrophes_3F65BD59C4F05DB38801813BABC55218" xlink:type="arc" />
    <link:label id="lab_sigi_TotalPropertyLosses_38E1E8871762BE196F76B0D0C83C5DC3_terseLabel_en-US" xlink:label="lab_sigi_TotalPropertyLosses_1D6414E9BF7E5271947357C3B4B6C122" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Property Losses</link:label>
    <link:label id="lab_sigi_TotalPropertyLosses_38E1E8871762BE196F76B0D0C83C5DC3_label_en-US" xlink:label="lab_sigi_TotalPropertyLosses_1D6414E9BF7E5271947357C3B4B6C122" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Property Losses</link:label>
    <link:label id="lab_sigi_TotalPropertyLosses_38E1E8871762BE196F76B0D0C83C5DC3_documentation_en-US" xlink:label="lab_sigi_TotalPropertyLosses_1D6414E9BF7E5271947357C3B4B6C122" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The total catastrophe and non catastrophe property losses occurring in the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalPropertyLosses" xlink:label="loc_sigi_TotalPropertyLosses_1D6414E9BF7E5271947357C3B4B6C122" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalPropertyLosses_1D6414E9BF7E5271947357C3B4B6C122" xlink:to="lab_sigi_TotalPropertyLosses_1D6414E9BF7E5271947357C3B4B6C122" xlink:type="arc" />
    <link:label id="lab_sigi_TotalPropertyLossEstimate_CEC5A2AA9BCFDDD99BD5B0D3B6CE3733_terseLabel_en-US" xlink:label="lab_sigi_TotalPropertyLossEstimate_C0CEA4EF0A875B269071B6DFF45233E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Property Loss Estimate</link:label>
    <link:label id="lab_sigi_TotalPropertyLossEstimate_CEC5A2AA9BCFDDD99BD5B0D3B6CE3733_label_en-US" xlink:label="lab_sigi_TotalPropertyLossEstimate_C0CEA4EF0A875B269071B6DFF45233E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Property Loss Estimate</link:label>
    <link:label id="lab_sigi_TotalPropertyLossEstimate_CEC5A2AA9BCFDDD99BD5B0D3B6CE3733_documentation_en-US" xlink:label="lab_sigi_TotalPropertyLossEstimate_C0CEA4EF0A875B269071B6DFF45233E3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Estimate of total property losses for the period.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalPropertyLossEstimate" xlink:label="loc_sigi_TotalPropertyLossEstimate_C0CEA4EF0A875B269071B6DFF45233E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalPropertyLossEstimate_C0CEA4EF0A875B269071B6DFF45233E3" xlink:to="lab_sigi_TotalPropertyLossEstimate_C0CEA4EF0A875B269071B6DFF45233E3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventsTextBlock_1A128D727FDC7F74BCC59EF8FC803666_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_A013C7EA046D543A8F17A0557890FE91" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Events [Text Block]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventsTextBlock_1A128D727FDC7F74BCC59EF8FC803666_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_A013C7EA046D543A8F17A0557890FE91" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Events [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_A013C7EA046D543A8F17A0557890FE91" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsTextBlock_A013C7EA046D543A8F17A0557890FE91" xlink:to="lab_us-gaap_SubsequentEventsTextBlock_A013C7EA046D543A8F17A0557890FE91" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_C62474E791CE661C90E2101EE505DF72_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8BC94D5801B65F25A108219D70403B16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Property, Plant and Equipment [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_C62474E791CE661C90E2101EE505DF72_label_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8BC94D5801B65F25A108219D70403B16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8BC94D5801B65F25A108219D70403B16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8BC94D5801B65F25A108219D70403B16" xlink:to="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_8BC94D5801B65F25A108219D70403B16" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_AD91E73FC26BE3A995FB101EE5050F82_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D4F102D9BBEE56DD977E463C9AF815B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment by Type [Axis]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_AD91E73FC26BE3A995FB101EE5050F82_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D4F102D9BBEE56DD977E463C9AF815B7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D4F102D9BBEE56DD977E463C9AF815B7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D4F102D9BBEE56DD977E463C9AF815B7" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D4F102D9BBEE56DD977E463C9AF815B7" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_5311AFC5DE9703143CEC101EE5054ACF_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7F5DA8772B7F50D1853BC27551962B87" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_5311AFC5DE9703143CEC101EE5054ACF_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7F5DA8772B7F50D1853BC27551962B87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7F5DA8772B7F50D1853BC27551962B87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7F5DA8772B7F50D1853BC27551962B87" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7F5DA8772B7F50D1853BC27551962B87" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComputerEquipmentMember_B80E4F9F2C46F4819435101EE505C242_terseLabel_en-US" xlink:label="lab_us-gaap_ComputerEquipmentMember_252C33A7D9B451CC8129F46FA2086364" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Computer hardware [Member]</link:label>
    <link:label id="lab_us-gaap_ComputerEquipmentMember_B80E4F9F2C46F4819435101EE505C242_label_en-US" xlink:label="lab_us-gaap_ComputerEquipmentMember_252C33A7D9B451CC8129F46FA2086364" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Computer Equipment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComputerEquipmentMember" xlink:label="loc_us-gaap_ComputerEquipmentMember_252C33A7D9B451CC8129F46FA2086364" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComputerEquipmentMember_252C33A7D9B451CC8129F46FA2086364" xlink:to="lab_us-gaap_ComputerEquipmentMember_252C33A7D9B451CC8129F46FA2086364" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_7CADD75697D965041FF8101EE505E91D_terseLabel_en-US" xlink:label="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_A2E965CBD3095508A2322E9AC4AC74FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Computer software [Member]</link:label>
    <link:label id="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_7CADD75697D965041FF8101EE505E91D_label_en-US" xlink:label="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_A2E965CBD3095508A2322E9AC4AC74FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Computer Software, Intangible Asset [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_A2E965CBD3095508A2322E9AC4AC74FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_A2E965CBD3095508A2322E9AC4AC74FA" xlink:to="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_A2E965CBD3095508A2322E9AC4AC74FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherIntangibleAssetsMember_ED222D192C15CD20E427101EE5069AEA_terseLabel_en-US" xlink:label="lab_us-gaap_OtherIntangibleAssetsMember_63E6F759683C5B8F905400F4FD7892CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Software licenses [Member]</link:label>
    <link:label id="lab_us-gaap_OtherIntangibleAssetsMember_ED222D192C15CD20E427101EE5069AEA_label_en-US" xlink:label="lab_us-gaap_OtherIntangibleAssetsMember_63E6F759683C5B8F905400F4FD7892CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Intangible Assets [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_63E6F759683C5B8F905400F4FD7892CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_63E6F759683C5B8F905400F4FD7892CF" xlink:to="lab_us-gaap_OtherIntangibleAssetsMember_63E6F759683C5B8F905400F4FD7892CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_SoftwareDevelopmentMember_52424693DD866BFF6D98101EE506D255_terseLabel_en-US" xlink:label="lab_us-gaap_SoftwareDevelopmentMember_48E5C773D0A458B4A817E7AAF83FB19C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internally developed software [Member]</link:label>
    <link:label id="lab_us-gaap_SoftwareDevelopmentMember_52424693DD866BFF6D98101EE506D255_label_en-US" xlink:label="lab_us-gaap_SoftwareDevelopmentMember_48E5C773D0A458B4A817E7AAF83FB19C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Software Development [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SoftwareDevelopmentMember" xlink:label="loc_us-gaap_SoftwareDevelopmentMember_48E5C773D0A458B4A817E7AAF83FB19C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SoftwareDevelopmentMember_48E5C773D0A458B4A817E7AAF83FB19C" xlink:to="lab_us-gaap_SoftwareDevelopmentMember_48E5C773D0A458B4A817E7AAF83FB19C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FurnitureAndFixturesMember_3D8D6CCE5B9B68727F47101EE506C146_terseLabel_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_1EB93FB9000255E4A6AC4B686D1E745F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Furniture and fixtures [Member]</link:label>
    <link:label id="lab_us-gaap_FurnitureAndFixturesMember_3D8D6CCE5B9B68727F47101EE506C146_label_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_1EB93FB9000255E4A6AC4B686D1E745F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Furniture and Fixtures [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_1EB93FB9000255E4A6AC4B686D1E745F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FurnitureAndFixturesMember_1EB93FB9000255E4A6AC4B686D1E745F" xlink:to="lab_us-gaap_FurnitureAndFixturesMember_1EB93FB9000255E4A6AC4B686D1E745F" xlink:type="arc" />
    <link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_A44EF76AD655E89D7340101EE506B7D0_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_0DAE392CAA26543D9053103FBBC1D5B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Building and improvements [Member]</link:label>
    <link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_A44EF76AD655E89D7340101EE506B7D0_label_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_0DAE392CAA26543D9053103FBBC1D5B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Building and Building Improvements [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_0DAE392CAA26543D9053103FBBC1D5B6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingAndBuildingImprovementsMember_0DAE392CAA26543D9053103FBBC1D5B6" xlink:to="lab_us-gaap_BuildingAndBuildingImprovementsMember_0DAE392CAA26543D9053103FBBC1D5B6" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_B7BA416C60187781C4A7101EE5066EF3_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_D69245B64C255BE7AAD802FD89545F38" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Estimated Useful Lives</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_B7BA416C60187781C4A7101EE5066EF3_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_D69245B64C255BE7AAD802FD89545F38" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Estimated Useful Lives</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_D69245B64C255BE7AAD802FD89545F38" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_D69245B64C255BE7AAD802FD89545F38" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_D69245B64C255BE7AAD802FD89545F38" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_27877035D4D68901F4DB90D1DFDBE211_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_9AFF4F36E83B52B895FDE1C1F05695E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2018- Capital Leases</link:label>
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_27877035D4D68901F4DB90D1DFDBE211_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_9AFF4F36E83B52B895FDE1C1F05695E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Leases, Future Minimum Payments Due, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_9AFF4F36E83B52B895FDE1C1F05695E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_9AFF4F36E83B52B895FDE1C1F05695E5" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_9AFF4F36E83B52B895FDE1C1F05695E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_351AC4049955D0ABAA2290D1DFDBBA39_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_59D71E877BB45D4D96FECE97F24E23FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019- Capital Leases</link:label>
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_351AC4049955D0ABAA2290D1DFDBBA39_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_59D71E877BB45D4D96FECE97F24E23FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Leases, Future Minimum Payments Due in Two Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_59D71E877BB45D4D96FECE97F24E23FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_59D71E877BB45D4D96FECE97F24E23FC" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_59D71E877BB45D4D96FECE97F24E23FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_CE37322285D39846613C90D1DFDBD91D_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_CC592A7D12C457478AAF18E6C027F910" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020- Capital Leases</link:label>
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_CE37322285D39846613C90D1DFDBD91D_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_CC592A7D12C457478AAF18E6C027F910" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Leases, Future Minimum Payments Due in Three Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_CC592A7D12C457478AAF18E6C027F910" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_CC592A7D12C457478AAF18E6C027F910" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_CC592A7D12C457478AAF18E6C027F910" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_7384E05E31313A21F71D90D1DFDBE171_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_078C121A739F578F8F71475EE9AE45CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021- Capital Leases</link:label>
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_7384E05E31313A21F71D90D1DFDBE171_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_078C121A739F578F8F71475EE9AE45CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Leases, Future Minimum Payments Due in Four Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_078C121A739F578F8F71475EE9AE45CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_078C121A739F578F8F71475EE9AE45CF" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_078C121A739F578F8F71475EE9AE45CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_4D355A012F3AB0EE038390D1DFDB4128_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_7D59C8FA89835AF9A2CA1C6BBED8D071" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022- Capital Leases</link:label>
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_4D355A012F3AB0EE038390D1DFDB4128_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_7D59C8FA89835AF9A2CA1C6BBED8D071" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Leases, Future Minimum Payments Due in Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_7D59C8FA89835AF9A2CA1C6BBED8D071" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_7D59C8FA89835AF9A2CA1C6BBED8D071" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_7D59C8FA89835AF9A2CA1C6BBED8D071" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_84690A5E29D661A4BF4E90D1DFDBB2D8_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_D239397C53C25B3A8A45D149BB2AA21A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">After 2022- Capital Leases</link:label>
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_84690A5E29D661A4BF4E90D1DFDBB2D8_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_D239397C53C25B3A8A45D149BB2AA21A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Leases, Future Minimum Payments Due Thereafter</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_D239397C53C25B3A8A45D149BB2AA21A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_D239397C53C25B3A8A45D149BB2AA21A" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_D239397C53C25B3A8A45D149BB2AA21A" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_FD00BCA3B025DE2F4B6F90D1DFDB1C2D_totalLabel_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_AEB4865682CD5C39A1F4C0FBC47859BD" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total minimum payment required- Capital Leases</link:label>
    <link:label id="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_FD00BCA3B025DE2F4B6F90D1DFDB1C2D_label_en-US" xlink:label="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_AEB4865682CD5C39A1F4C0FBC47859BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Leases, Future Minimum Payments Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_AEB4865682CD5C39A1F4C0FBC47859BD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_AEB4865682CD5C39A1F4C0FBC47859BD" xlink:to="lab_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_AEB4865682CD5C39A1F4C0FBC47859BD" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_0FD68FFBD8C3C84133DD90D1DFDB0514_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_C837966A33445EFB8A69AA9E33A51C53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2018- Operating Leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_0FD68FFBD8C3C84133DD90D1DFDB0514_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_C837966A33445EFB8A69AA9E33A51C53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments Due, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_C837966A33445EFB8A69AA9E33A51C53" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_C837966A33445EFB8A69AA9E33A51C53" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_C837966A33445EFB8A69AA9E33A51C53" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_E2E0E28B0FB16E0D4DDE90D1DFDB1BD2_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_D934EB5EBD805622BBAA7FF5D65CA905" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019- Operating Leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_E2E0E28B0FB16E0D4DDE90D1DFDB1BD2_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_D934EB5EBD805622BBAA7FF5D65CA905" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Two Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_D934EB5EBD805622BBAA7FF5D65CA905" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_D934EB5EBD805622BBAA7FF5D65CA905" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_D934EB5EBD805622BBAA7FF5D65CA905" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_0784EA415E0365CC757090D1DFDBE90A_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_1F89C6C8BF295E9BADAF491BF0E46CB1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020- Operating Leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_0784EA415E0365CC757090D1DFDBE90A_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_1F89C6C8BF295E9BADAF491BF0E46CB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Three Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_1F89C6C8BF295E9BADAF491BF0E46CB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_1F89C6C8BF295E9BADAF491BF0E46CB1" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_1F89C6C8BF295E9BADAF491BF0E46CB1" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_6E7121E0526E4066661690D1DFDB3B6E_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_3CD632392BE55CB79F9226792E959EEB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021- Operating Leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_6E7121E0526E4066661690D1DFDB3B6E_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_3CD632392BE55CB79F9226792E959EEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Four Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_3CD632392BE55CB79F9226792E959EEB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_3CD632392BE55CB79F9226792E959EEB" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_3CD632392BE55CB79F9226792E959EEB" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_437998F52523D7D1A6F990D1DFDB4786_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5711C5A3233D59D98AC8D923CC10794B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022- Operating Leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_437998F52523D7D1A6F990D1DFDB4786_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5711C5A3233D59D98AC8D923CC10794B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5711C5A3233D59D98AC8D923CC10794B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5711C5A3233D59D98AC8D923CC10794B" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_5711C5A3233D59D98AC8D923CC10794B" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_ED475AA426940402575090D1DFDBD275_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5898EA3BCF7A51028A860D151041C5E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">After 2022- Operating Leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_ED475AA426940402575090D1DFDBD275_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5898EA3BCF7A51028A860D151041C5E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due Thereafter</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5898EA3BCF7A51028A860D151041C5E0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5898EA3BCF7A51028A860D151041C5E0" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5898EA3BCF7A51028A860D151041C5E0" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_4196D33FDAE63D4E59E090D1DFDB3BE7_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_A96AF80E02A95C9E90EAEB81B59FA94A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total minimum payment required- Operating Leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_4196D33FDAE63D4E59E090D1DFDB3BE7_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_A96AF80E02A95C9E90EAEB81B59FA94A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_A96AF80E02A95C9E90EAEB81B59FA94A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_A96AF80E02A95C9E90EAEB81B59FA94A" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_A96AF80E02A95C9E90EAEB81B59FA94A" xlink:type="arc" />
    <link:label id="lab_sigi_TotalLeasesDueCurrentYear_F00D7987416359C44C5690D1DFDC1D5B_terseLabel_en-US" xlink:label="lab_sigi_TotalLeasesDueCurrentYear_3AC41B59F1E753218F17788694E356C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2018- Total Leases</link:label>
    <link:label id="lab_sigi_TotalLeasesDueCurrentYear_F00D7987416359C44C5690D1DFDC1D5B_label_en-US" xlink:label="lab_sigi_TotalLeasesDueCurrentYear_3AC41B59F1E753218F17788694E356C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Leases Due Current Year</link:label>
    <link:label id="lab_sigi_TotalLeasesDueCurrentYear_F00D7987416359C44C5690D1DFDC1D5B_documentation_en-US" xlink:label="lab_sigi_TotalLeasesDueCurrentYear_3AC41B59F1E753218F17788694E356C7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for all leases.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalLeasesDueCurrentYear" xlink:label="loc_sigi_TotalLeasesDueCurrentYear_3AC41B59F1E753218F17788694E356C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalLeasesDueCurrentYear_3AC41B59F1E753218F17788694E356C7" xlink:to="lab_sigi_TotalLeasesDueCurrentYear_3AC41B59F1E753218F17788694E356C7" xlink:type="arc" />
    <link:label id="lab_sigi_TotalLeasesDueInTwoYears_A11D8FF4CC3ED3AFE5BC90D1DFDC1F4B_terseLabel_en-US" xlink:label="lab_sigi_TotalLeasesDueInTwoYears_4D6BADB8266A50DAB568675999E642F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019- Total Leases</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInTwoYears_A11D8FF4CC3ED3AFE5BC90D1DFDC1F4B_label_en-US" xlink:label="lab_sigi_TotalLeasesDueInTwoYears_4D6BADB8266A50DAB568675999E642F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Leases Due In Two Years</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInTwoYears_A11D8FF4CC3ED3AFE5BC90D1DFDC1F4B_documentation_en-US" xlink:label="lab_sigi_TotalLeasesDueInTwoYears_4D6BADB8266A50DAB568675999E642F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of minimum lease payments maturing in the second fiscal year following the latest fiscal year for all leases</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalLeasesDueInTwoYears" xlink:label="loc_sigi_TotalLeasesDueInTwoYears_4D6BADB8266A50DAB568675999E642F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalLeasesDueInTwoYears_4D6BADB8266A50DAB568675999E642F7" xlink:to="lab_sigi_TotalLeasesDueInTwoYears_4D6BADB8266A50DAB568675999E642F7" xlink:type="arc" />
    <link:label id="lab_sigi_TotalLeasesDueInThreeYears_5CC9C3399C344446119590D1DFDC38A4_terseLabel_en-US" xlink:label="lab_sigi_TotalLeasesDueInThreeYears_7556B9C417E053F999C799D7D002EFA0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020- Total Leases</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInThreeYears_5CC9C3399C344446119590D1DFDC38A4_label_en-US" xlink:label="lab_sigi_TotalLeasesDueInThreeYears_7556B9C417E053F999C799D7D002EFA0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Leases Due In Three Years</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInThreeYears_5CC9C3399C344446119590D1DFDC38A4_documentation_en-US" xlink:label="lab_sigi_TotalLeasesDueInThreeYears_7556B9C417E053F999C799D7D002EFA0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for all leases.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalLeasesDueInThreeYears" xlink:label="loc_sigi_TotalLeasesDueInThreeYears_7556B9C417E053F999C799D7D002EFA0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalLeasesDueInThreeYears_7556B9C417E053F999C799D7D002EFA0" xlink:to="lab_sigi_TotalLeasesDueInThreeYears_7556B9C417E053F999C799D7D002EFA0" xlink:type="arc" />
    <link:label id="lab_sigi_TotalLeasesDueInFourYears_A174F50D7C04D0BE245590D1DFDC1452_terseLabel_en-US" xlink:label="lab_sigi_TotalLeasesDueInFourYears_F32FCABDB5145597B96CEB698DBB18C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021- Total Leases</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInFourYears_A174F50D7C04D0BE245590D1DFDC1452_label_en-US" xlink:label="lab_sigi_TotalLeasesDueInFourYears_F32FCABDB5145597B96CEB698DBB18C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Leases Due In Four Years</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInFourYears_A174F50D7C04D0BE245590D1DFDC1452_documentation_en-US" xlink:label="lab_sigi_TotalLeasesDueInFourYears_F32FCABDB5145597B96CEB698DBB18C4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for all leases.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalLeasesDueInFourYears" xlink:label="loc_sigi_TotalLeasesDueInFourYears_F32FCABDB5145597B96CEB698DBB18C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalLeasesDueInFourYears_F32FCABDB5145597B96CEB698DBB18C4" xlink:to="lab_sigi_TotalLeasesDueInFourYears_F32FCABDB5145597B96CEB698DBB18C4" xlink:type="arc" />
    <link:label id="lab_sigi_TotalLeasesDueInFiveYears_8FF9E9731D3D71FA12EF90D1DFDC022A_terseLabel_en-US" xlink:label="lab_sigi_TotalLeasesDueInFiveYears_A54E81112F185C999CC09F137F60F127" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022- Total Leases</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInFiveYears_8FF9E9731D3D71FA12EF90D1DFDC022A_label_en-US" xlink:label="lab_sigi_TotalLeasesDueInFiveYears_A54E81112F185C999CC09F137F60F127" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Leases Due In Five Years</link:label>
    <link:label id="lab_sigi_TotalLeasesDueInFiveYears_8FF9E9731D3D71FA12EF90D1DFDC022A_documentation_en-US" xlink:label="lab_sigi_TotalLeasesDueInFiveYears_A54E81112F185C999CC09F137F60F127" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of minimum lease payments maturing in the fifth fiscal year following the latest fiscal year for all leases.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalLeasesDueInFiveYears" xlink:label="loc_sigi_TotalLeasesDueInFiveYears_A54E81112F185C999CC09F137F60F127" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalLeasesDueInFiveYears_A54E81112F185C999CC09F137F60F127" xlink:to="lab_sigi_TotalLeasesDueInFiveYears_A54E81112F185C999CC09F137F60F127" xlink:type="arc" />
    <link:label id="lab_sigi_TotalLeasesDueThereafter_CD9A3B4EE3750D36ED1190D1DFDCE15B_terseLabel_en-US" xlink:label="lab_sigi_TotalLeasesDueThereafter_631981323D99567EBF321F61A4D8EB9F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">After 2022- Total Leases</link:label>
    <link:label id="lab_sigi_TotalLeasesDueThereafter_CD9A3B4EE3750D36ED1190D1DFDCE15B_label_en-US" xlink:label="lab_sigi_TotalLeasesDueThereafter_631981323D99567EBF321F61A4D8EB9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Leases Due Thereafter</link:label>
    <link:label id="lab_sigi_TotalLeasesDueThereafter_CD9A3B4EE3750D36ED1190D1DFDCE15B_documentation_en-US" xlink:label="lab_sigi_TotalLeasesDueThereafter_631981323D99567EBF321F61A4D8EB9F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of minimum lease payments maturing after the fifth fiscal year following the latest fiscal year for all leases.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalLeasesDueThereafter" xlink:label="loc_sigi_TotalLeasesDueThereafter_631981323D99567EBF321F61A4D8EB9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalLeasesDueThereafter_631981323D99567EBF321F61A4D8EB9F" xlink:to="lab_sigi_TotalLeasesDueThereafter_631981323D99567EBF321F61A4D8EB9F" xlink:type="arc" />
    <link:label id="lab_sigi_TotalMinimumPaymentRequired_78617BCF761BFBE1422990D1DFDC8B14_totalLabel_en-US" xlink:label="lab_sigi_TotalMinimumPaymentRequired_59E7689BF2885B0D9E464DA4F18FE06A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total minimum payment required</link:label>
    <link:label id="lab_sigi_TotalMinimumPaymentRequired_78617BCF761BFBE1422990D1DFDC8B14_label_en-US" xlink:label="lab_sigi_TotalMinimumPaymentRequired_59E7689BF2885B0D9E464DA4F18FE06A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total Minimum Payment Required</link:label>
    <link:label id="lab_sigi_TotalMinimumPaymentRequired_78617BCF761BFBE1422990D1DFDC8B14_documentation_en-US" xlink:label="lab_sigi_TotalMinimumPaymentRequired_59E7689BF2885B0D9E464DA4F18FE06A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of minimum lease payments for all leases.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TotalMinimumPaymentRequired" xlink:label="loc_sigi_TotalMinimumPaymentRequired_59E7689BF2885B0D9E464DA4F18FE06A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TotalMinimumPaymentRequired_59E7689BF2885B0D9E464DA4F18FE06A" xlink:to="lab_sigi_TotalMinimumPaymentRequired_59E7689BF2885B0D9E464DA4F18FE06A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_ACD19556D23FF42754B1A02D4359F60A_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_A639CC44390C56E79BF499DEA9DA3D40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncements and Changes in Accounting Principles [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract" xlink:label="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_A639CC44390C56E79BF499DEA9DA3D40" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_A639CC44390C56E79BF499DEA9DA3D40" xlink:to="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesAbstract_A639CC44390C56E79BF499DEA9DA3D40" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_EA28DA248407273770BEA02D435A2ED9_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_601BD92F39875422946A4291064EAA69" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Cash Flow Supplemental Disclosures [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_EA28DA248407273770BEA02D435A2ED9_label_en-US" xlink:label="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_601BD92F39875422946A4291064EAA69" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Cash Flow Supplumental Disclosures [Axis]</link:label>
    <link:label id="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_EA28DA248407273770BEA02D435A2ED9_documentation_en-US" xlink:label="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_601BD92F39875422946A4291064EAA69" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of supplemental cash flow information for the periods presented</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis" xlink:label="loc_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_601BD92F39875422946A4291064EAA69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_601BD92F39875422946A4291064EAA69" xlink:to="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresAxis_601BD92F39875422946A4291064EAA69" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_A70FAB1EEECAA80AFA92A02D435AA6E0_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_BF78BA12EBA25DC8BCD6FE4809741077" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Cash Flow Supplemental Disclosures [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_A70FAB1EEECAA80AFA92A02D435AA6E0_label_en-US" xlink:label="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_BF78BA12EBA25DC8BCD6FE4809741077" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Cash Flow Supplumental Disclosures [Domain]</link:label>
    <link:label id="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_A70FAB1EEECAA80AFA92A02D435AA6E0_documentation_en-US" xlink:label="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_BF78BA12EBA25DC8BCD6FE4809741077" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of supplemental cash flow information for the periods presented</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain" xlink:label="loc_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_BF78BA12EBA25DC8BCD6FE4809741077" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_BF78BA12EBA25DC8BCD6FE4809741077" xlink:to="lab_sigi_ScheduleOfCashFlowSupplumentalDisclosuresDomain_BF78BA12EBA25DC8BCD6FE4809741077" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_5F81A99ADC516F7F5CE3A02D435C9EB9_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_1FED9254494B5F5C898032B8DD15F7E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation expense income tax benefit</link:label>
    <link:label id="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_5F81A99ADC516F7F5CE3A02D435C9EB9_label_en-US" xlink:label="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_1FED9254494B5F5C898032B8DD15F7E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments Related to Tax Withholding for Share-based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_1FED9254494B5F5C898032B8DD15F7E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_1FED9254494B5F5C898032B8DD15F7E7" xlink:to="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_1FED9254494B5F5C898032B8DD15F7E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss_CFFA46416874ECFA6CCFA02D435DC173_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss_858795DF5CAD5B63837F989F177872AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss) before Taxes</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss_CFFA46416874ECFA6CCFA02D435DC173_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss_858795DF5CAD5B63837F989F177872AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss) before Taxes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss_858795DF5CAD5B63837F989F177872AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss_858795DF5CAD5B63837F989F177872AD" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss_858795DF5CAD5B63837F989F177872AD" xlink:type="arc" />
    <link:label id="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome_D2691F10CF08E6CA01E8A032FBAB6A16_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome_3A1ED20CF5D451F2A11B6F786458FDC0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax</link:label>
    <link:label id="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome_D2691F10CF08E6CA01E8A032FBAB6A16_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome_3A1ED20CF5D451F2A11B6F786458FDC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome" xlink:label="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome_3A1ED20CF5D451F2A11B6F786458FDC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome_3A1ED20CF5D451F2A11B6F786458FDC0" xlink:to="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnNetIncome_3A1ED20CF5D451F2A11B6F786458FDC0" xlink:type="arc" />
    <link:label id="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare_F74BC4B443ECA5D315A6A02D435D0877_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare_40668464708C565F87492A83CB6CA856" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Diluted Earnings Per Share</link:label>
    <link:label id="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare_F74BC4B443ECA5D315A6A02D435D0877_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare_40668464708C565F87492A83CB6CA856" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Diluted Earnings Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare" xlink:label="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare_40668464708C565F87492A83CB6CA856" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare_40668464708C565F87492A83CB6CA856" xlink:to="lab_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfChangeOnDilutedEarningsPerShare_40668464708C565F87492A83CB6CA856" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMethodInvestmentDividendsOrDistributions_2DE45E74759837D3768DA02D435D26BC_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentDividendsOrDistributions_E5D46E7A10BE59BD91FAAE1195A783B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Equity Method Investment, Distribution</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestmentDividendsOrDistributions_2DE45E74759837D3768DA02D435D26BC_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentDividendsOrDistributions_E5D46E7A10BE59BD91FAAE1195A783B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Equity Method Investment, Distribution</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentDividendsOrDistributions" xlink:label="loc_us-gaap_EquityMethodInvestmentDividendsOrDistributions_E5D46E7A10BE59BD91FAAE1195A783B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestmentDividendsOrDistributions_E5D46E7A10BE59BD91FAAE1195A783B4" xlink:to="lab_us-gaap_EquityMethodInvestmentDividendsOrDistributions_E5D46E7A10BE59BD91FAAE1195A783B4" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_E0449E260EAB932B48FFA02D435D4479_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_66F68E7CDE4B5EA1B8667D95EB84EF50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_E0449E260EAB932B48FFA02D435D4479_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_66F68E7CDE4B5EA1B8667D95EB84EF50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_66F68E7CDE4B5EA1B8667D95EB84EF50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_66F68E7CDE4B5EA1B8667D95EB84EF50" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_66F68E7CDE4B5EA1B8667D95EB84EF50" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3741AEA2D91DDC381324A02D435D9581_terseLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_72FDBDC986A454ED8094FD9C5F066547" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_3741AEA2D91DDC381324A02D435D9581_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_72FDBDC986A454ED8094FD9C5F066547" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_72FDBDC986A454ED8094FD9C5F066547" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_72FDBDC986A454ED8094FD9C5F066547" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_72FDBDC986A454ED8094FD9C5F066547" xlink:type="arc" />
    <link:label id="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_91BE32F70C67FDD34819101EE64B8826_terseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_5D5FAF51DCE858DFBBF9227531D161F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Pronouncements</link:label>
    <link:label id="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_91BE32F70C67FDD34819101EE64B8826_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_5D5FAF51DCE858DFBBF9227531D161F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncements and Changes in Accounting Principles [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_5D5FAF51DCE858DFBBF9227531D161F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_5D5FAF51DCE858DFBBF9227531D161F2" xlink:to="lab_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_5D5FAF51DCE858DFBBF9227531D161F2" xlink:type="arc" />
    <link:label id="lab_sigi_InvestmentsPledgedAsCollateralTable_C862BF068688C1414712A02D430F6469_terseLabel_en-US" xlink:label="lab_sigi_InvestmentsPledgedAsCollateralTable_2F6DDCFBEDD75B71A6656854B46C0A50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments Pledged As Collateral [Table]</link:label>
    <link:label id="lab_sigi_InvestmentsPledgedAsCollateralTable_C862BF068688C1414712A02D430F6469_label_en-US" xlink:label="lab_sigi_InvestmentsPledgedAsCollateralTable_2F6DDCFBEDD75B71A6656854B46C0A50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments Pledged As Collateral [Table]</link:label>
    <link:label id="lab_sigi_InvestmentsPledgedAsCollateralTable_C862BF068688C1414712A02D430F6469_documentation_en-US" xlink:label="lab_sigi_InvestmentsPledgedAsCollateralTable_2F6DDCFBEDD75B71A6656854B46C0A50" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of financial instruments held by the entity for its own account for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions. Description may include equity, fixed income, debt or other securities.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_InvestmentsPledgedAsCollateralTable" xlink:label="loc_sigi_InvestmentsPledgedAsCollateralTable_2F6DDCFBEDD75B71A6656854B46C0A50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_InvestmentsPledgedAsCollateralTable_2F6DDCFBEDD75B71A6656854B46C0A50" xlink:to="lab_sigi_InvestmentsPledgedAsCollateralTable_2F6DDCFBEDD75B71A6656854B46C0A50" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_323D6C631802A2F1B744A02D43138909_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_58AA99DCF4795F85B9797FA076CDB290" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost/Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_323D6C631802A2F1B744A02D43138909_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_58AA99DCF4795F85B9797FA076CDB290" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Amortized Cost Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_58AA99DCF4795F85B9797FA076CDB290" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_58AA99DCF4795F85B9797FA076CDB290" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_58AA99DCF4795F85B9797FA076CDB290" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_A5FA570259BF9491A5DFA02D43130056_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_A0D5E673E14451358678F9933821A0CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized Gains</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_A5FA570259BF9491A5DFA02D43130056_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_A0D5E673E14451358678F9933821A0CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_A0D5E673E14451358678F9933821A0CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_A0D5E673E14451358678F9933821A0CF" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_A0D5E673E14451358678F9933821A0CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_FF8B334166555109CC0AA02D43131E06_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0C42408612D155D6B800719D9BB64FAF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unrealized Losses</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_FF8B334166555109CC0AA02D43131E06_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0C42408612D155D6B800719D9BB64FAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0C42408612D155D6B800719D9BB64FAF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0C42408612D155D6B800719D9BB64FAF" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0C42408612D155D6B800719D9BB64FAF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecurities_B66629B6EBE484C570C9A02D4314CA8B_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecurities_4574BDAE5980571F9B622B464D516987" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total AFS securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_4574BDAE5980571F9B622B464D516987" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecurities_4574BDAE5980571F9B622B464D516987" xlink:to="lab_us-gaap_AvailableForSaleSecurities_4574BDAE5980571F9B622B464D516987" xlink:type="arc" />
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_1C8F5F0E5D424B58DA9D101EE3DEAFA5_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments_51F0FB9865E65D7C9C3E7E905AD300C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Operating Segments</link:label>
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_1C8F5F0E5D424B58DA9D101EE3DEAFA5_label_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments_51F0FB9865E65D7C9C3E7E905AD300C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Operating Segments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_51F0FB9865E65D7C9C3E7E905AD300C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfOperatingSegments_51F0FB9865E65D7C9C3E7E905AD300C9" xlink:to="lab_us-gaap_NumberOfOperatingSegments_51F0FB9865E65D7C9C3E7E905AD300C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_790D55ABA73EF0B5F065101EE3DEDAFC_verboseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_18C98A89D9235252A08AB16CB9873DE2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Goodwill balance for our Standard Commercial Lines reporting unit</link:label>
    <link:label id="lab_us-gaap_Goodwill_790D55ABA73EF0B5F065101EE3DEDAFC_label_en-US" xlink:label="lab_us-gaap_Goodwill_18C98A89D9235252A08AB16CB9873DE2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_18C98A89D9235252A08AB16CB9873DE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_18C98A89D9235252A08AB16CB9873DE2" xlink:to="lab_us-gaap_Goodwill_18C98A89D9235252A08AB16CB9873DE2" xlink:type="arc" />
    <link:label id="lab_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_1021D8095B3FABD59AF0101EE3DE618C_terseLabel_en-US" xlink:label="lab_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_5EFF8445989D56E88DEE831B3C1F3734" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of net premiums written related to insurance policies written in New Jersey</link:label>
    <link:label id="lab_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_1021D8095B3FABD59AF0101EE3DE618C_label_en-US" xlink:label="lab_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_5EFF8445989D56E88DEE831B3C1F3734" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographic Concentration Of Net Premiums Written Percentage</link:label>
    <link:label id="lab_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_1021D8095B3FABD59AF0101EE3DE618C_documentation_en-US" xlink:label="lab_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_5EFF8445989D56E88DEE831B3C1F3734" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the geographic concentration of net premiums written, reflected as a percentage of New Jersey net written premiums compared to our total net premiums written.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage" xlink:label="loc_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_5EFF8445989D56E88DEE831B3C1F3734" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_5EFF8445989D56E88DEE831B3C1F3734" xlink:to="lab_sigi_GeographicConcentrationOfNetPremiumsWrittenPercentage_5EFF8445989D56E88DEE831B3C1F3734" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock_2699C5BB492FA049F4E4101EE4400E58_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock_652F856C77185B9F9B6E15BB2FB483BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule IV - Reinsurance</link:label>
    <link:label id="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock_2699C5BB492FA049F4E4101EE4400E58_label_en-US" xlink:label="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock_652F856C77185B9F9B6E15BB2FB483BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Schedule of Reinsurance Premiums for Insurance Companies [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock" xlink:label="loc_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock_652F856C77185B9F9B6E15BB2FB483BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock_652F856C77185B9F9B6E15BB2FB483BE" xlink:to="lab_us-gaap_SupplementalScheduleOfReinsurancePremiumsForInsuranceCompaniesTextBlock_652F856C77185B9F9B6E15BB2FB483BE" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_9CDAD8A58FFA88BBA6E0A04F72F34DA0_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_76DEF87F4A965B599DA7844DDCDFB185" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2018</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_9CDAD8A58FFA88BBA6E0A04F72F34DA0_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_76DEF87F4A965B599DA7844DDCDFB185" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_76DEF87F4A965B599DA7844DDCDFB185" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_76DEF87F4A965B599DA7844DDCDFB185" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_76DEF87F4A965B599DA7844DDCDFB185" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_B9E7CC0F29ADCDF29A56A04F72F316D8_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_383E1086D81A52E79CE7DA7BCDFAB1D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_B9E7CC0F29ADCDF29A56A04F72F316D8_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_383E1086D81A52E79CE7DA7BCDFAB1D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_383E1086D81A52E79CE7DA7BCDFAB1D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_383E1086D81A52E79CE7DA7BCDFAB1D2" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_383E1086D81A52E79CE7DA7BCDFAB1D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_762C73A1F0C4804CAF4FA04F72F33F0A_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_70235A8DA84D5FD8A8801BEA1D13B3CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_762C73A1F0C4804CAF4FA04F72F33F0A_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_70235A8DA84D5FD8A8801BEA1D13B3CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_70235A8DA84D5FD8A8801BEA1D13B3CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_70235A8DA84D5FD8A8801BEA1D13B3CE" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_70235A8DA84D5FD8A8801BEA1D13B3CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_F6D40E290F7A042361C8A04F72F30861_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_0FA2824DEB645CFB84A8723A26D57A05" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_F6D40E290F7A042361C8A04F72F30861_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_0FA2824DEB645CFB84A8723A26D57A05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_0FA2824DEB645CFB84A8723A26D57A05" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_0FA2824DEB645CFB84A8723A26D57A05" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_0FA2824DEB645CFB84A8723A26D57A05" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_7B9C0C713013BEA4C135A04F72F34DAA_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_80CE450A2FCC5C0582DA976664968C65" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_7B9C0C713013BEA4C135A04F72F34DAA_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_80CE450A2FCC5C0582DA976664968C65" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_80CE450A2FCC5C0582DA976664968C65" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_80CE450A2FCC5C0582DA976664968C65" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_80CE450A2FCC5C0582DA976664968C65" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_19513D8C9F2807A963CBA04F72F31998_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_68AED4588F5B58D0B877362C5D5F25FB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023 - 2027</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_19513D8C9F2807A963CBA04F72F31998_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_68AED4588F5B58D0B877362C5D5F25FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_68AED4588F5B58D0B877362C5D5F25FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_68AED4588F5B58D0B877362C5D5F25FB" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_68AED4588F5B58D0B877362C5D5F25FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsLineItems_5E1FAB2373E9330074879FB7665F0CB8_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsLineItems_A207F5B316AE5E40AF4D8C930A6B93AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInvestmentsLineItems_5E1FAB2373E9330074879FB7665F0CB8_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInvestmentsLineItems_A207F5B316AE5E40AF4D8C930A6B93AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Investments [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_A207F5B316AE5E40AF4D8C930A6B93AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_A207F5B316AE5E40AF4D8C930A6B93AF" xlink:to="lab_us-gaap_ScheduleOfInvestmentsLineItems_A207F5B316AE5E40AF4D8C930A6B93AF" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock_49367D7DBD70C4951A509FB7665F7D5C_terseLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock_A494423E8FE05A16AD063CF812891188" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Unrealized Gains On Investments</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock_49367D7DBD70C4951A509FB7665F7D5C_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock_A494423E8FE05A16AD063CF812891188" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Investments [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock_A494423E8FE05A16AD063CF812891188" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock_A494423E8FE05A16AD063CF812891188" xlink:to="lab_us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock_A494423E8FE05A16AD063CF812891188" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_E7EB1D4AD12BAD15C67F9FB7665F6D2B_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_58580BAC11835CBF96916540163F6E16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Held-to-maturity Securities</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_E7EB1D4AD12BAD15C67F9FB7665F6D2B_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_58580BAC11835CBF96916540163F6E16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesTextBlock" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesTextBlock_58580BAC11835CBF96916540163F6E16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesTextBlock_58580BAC11835CBF96916540163F6E16" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_58580BAC11835CBF96916540163F6E16" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock_0AAAE54C42C0D6E4C3729FB7665FAFC6_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock_F4F64567D9295BF49773C6FFF83F8C46" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Available For Sale Securities</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock_0AAAE54C42C0D6E4C3729FB7665FAFC6_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock_F4F64567D9295BF49773C6FFF83F8C46" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Available-for-sale Securities Reconciliation [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock_F4F64567D9295BF49773C6FFF83F8C46" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock_F4F64567D9295BF49773C6FFF83F8C46" xlink:to="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock_F4F64567D9295BF49773C6FFF83F8C46" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_D8951E5B6D3F576A68E79FB7665FD916_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_EC238BE54FD85589B6DFF4F3012069E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value and Gross Pre-Tax Net Unrealized/Unrecognized Loss of Securities by Length of Time</link:label>
    <link:label id="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_D8951E5B6D3F576A68E79FB7665FD916_label_en-US" xlink:label="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_EC238BE54FD85589B6DFF4F3012069E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Unrealized Loss on Investments [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_EC238BE54FD85589B6DFF4F3012069E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_EC238BE54FD85589B6DFF4F3012069E1" xlink:to="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_EC238BE54FD85589B6DFF4F3012069E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_4705C338CA74028D9C989FB7665FC605_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_6FA545DEC19357EC965C59493F1657F1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments Classified by Contractual Maturity Date [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_4705C338CA74028D9C989FB7665FC605_label_en-US" xlink:label="lab_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_6FA545DEC19357EC965C59493F1657F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments Classified by Contractual Maturity Date [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:label="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_6FA545DEC19357EC965C59493F1657F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_6FA545DEC19357EC965C59493F1657F1" xlink:to="lab_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_6FA545DEC19357EC965C59493F1657F1" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_F01F7706730FDBA331E49FB7665F5E93_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_6DDEA1507D6759F1B18729D6D341BC24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Other Investment Portfolio by Strategy and the Remaining Commitment Amount Associated With Each Strategy</link:label>
    <link:label id="lab_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_F01F7706730FDBA331E49FB7665F5E93_label_en-US" xlink:label="lab_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_6DDEA1507D6759F1B18729D6D341BC24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Other Investment Portfolio By Strategy And The Remaining Commitment Amount Associated With Each Strategy [TextBlock]</link:label>
    <link:label id="lab_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_F01F7706730FDBA331E49FB7665F5E93_documentation_en-US" xlink:label="lab_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_6DDEA1507D6759F1B18729D6D341BC24" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents disclosure of information regarding the other investment portfolio, including carrying value and remaining commitments on the portfolio, broken out by strategy.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock" xlink:label="loc_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_6DDEA1507D6759F1B18729D6D341BC24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_6DDEA1507D6759F1B18729D6D341BC24" xlink:to="lab_sigi_ScheduleOfOtherInvestmentPortfolioByStrategyAndRemainingCommitmentAmountAssociatedWithEachStrategyTextblock_6DDEA1507D6759F1B18729D6D341BC24" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_7D9D089C3DCDA9C03FF89FB7665FDD12_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_B4AEF8CA85E0587197D31AFA9CB3A5CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Aggregated Summarized Balance Sheet Financial Information For Partnerhips In Our Alternative Investment Portfolio</link:label>
    <link:label id="lab_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_7D9D089C3DCDA9C03FF89FB7665FDD12_label_en-US" xlink:label="lab_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_B4AEF8CA85E0587197D31AFA9CB3A5CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Aggregated Summarized Balance Sheet Financial Information For Partnerhips In Our Alternative Investment Portfolio [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_7D9D089C3DCDA9C03FF89FB7665FDD12_documentation_en-US" xlink:label="lab_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_B4AEF8CA85E0587197D31AFA9CB3A5CF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of aggregate summarized balance sheet information for alternative investments accounted for by the equity method.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock" xlink:label="loc_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_B4AEF8CA85E0587197D31AFA9CB3A5CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_B4AEF8CA85E0587197D31AFA9CB3A5CF" xlink:to="lab_sigi_ScheduleOfAggregatedSummarizedBalanceSheetFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_B4AEF8CA85E0587197D31AFA9CB3A5CF" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_D33D39B9F08D92295D4F9FB7665F69F2_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_CB2681172C1253FE9652E6F06FA111A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Aggregated Summarized Income Statement Financial Information For Partnerhips In Our Alternative Investment Portfolio</link:label>
    <link:label id="lab_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_D33D39B9F08D92295D4F9FB7665F69F2_label_en-US" xlink:label="lab_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_CB2681172C1253FE9652E6F06FA111A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Aggregated Summarized Income Statement Financial Information For Partnerhips In Our Alternative Investment Portfolio [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_D33D39B9F08D92295D4F9FB7665F69F2_documentation_en-US" xlink:label="lab_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_CB2681172C1253FE9652E6F06FA111A3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of aggregate summarized income statement information for alternative investments accounted for by the equity method.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock" xlink:label="loc_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_CB2681172C1253FE9652E6F06FA111A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_CB2681172C1253FE9652E6F06FA111A3" xlink:to="lab_sigi_ScheduleOfAggregatedSummarizedIncomeStatementFinancialInformationForPartnerhipsInOurAlternativeInvestmentPortfolioTableTextBlock_CB2681172C1253FE9652E6F06FA111A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_092046A085CF3CE271EA9FB7665FF004_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_8C929C8FDD03515BAFE56EEB1732486D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Securities Pledged As Collateral</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_092046A085CF3CE271EA9FB7665FF004_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_8C929C8FDD03515BAFE56EEB1732486D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock" xlink:label="loc_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_8C929C8FDD03515BAFE56EEB1732486D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_8C929C8FDD03515BAFE56EEB1732486D" xlink:to="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_8C929C8FDD03515BAFE56EEB1732486D" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentIncomeTextBlock_CF7C4B7D9C610E54915E9FB7665FDAAF_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeTextBlock_EC30969CE0D451A7BF6D64F438BC3FB4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components of Pre-Tax Net Investment Income Earned</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeTextBlock_CF7C4B7D9C610E54915E9FB7665FDAAF_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeTextBlock_EC30969CE0D451A7BF6D64F438BC3FB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Income [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentIncomeTextBlock" xlink:label="loc_us-gaap_InvestmentIncomeTextBlock_EC30969CE0D451A7BF6D64F438BC3FB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIncomeTextBlock_EC30969CE0D451A7BF6D64F438BC3FB4" xlink:to="lab_us-gaap_InvestmentIncomeTextBlock_EC30969CE0D451A7BF6D64F438BC3FB4" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_FAF1F3222EA2C1B6B2CB9FB7665FC0FE_terseLabel_en-US" xlink:label="lab_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_A4E57E6D1FFC55A0BE055FB6422240C2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of OTTI by Asset Type</link:label>
    <link:label id="lab_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_FAF1F3222EA2C1B6B2CB9FB7665FC0FE_label_en-US" xlink:label="lab_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_A4E57E6D1FFC55A0BE055FB6422240C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of O T T I By Asset Type [Table Text Block]</link:label>
    <link:label id="lab_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_FAF1F3222EA2C1B6B2CB9FB7665FC0FE_documentation_en-US" xlink:label="lab_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_A4E57E6D1FFC55A0BE055FB6422240C2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the schedule of other-than-temporary impairments recognized in the statement of income and other comprehensive income by asset type.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleOfOTTIByAssetTypeTableTextBlock" xlink:label="loc_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_A4E57E6D1FFC55A0BE055FB6422240C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_A4E57E6D1FFC55A0BE055FB6422240C2" xlink:to="lab_sigi_ScheduleOfOTTIByAssetTypeTableTextBlock_A4E57E6D1FFC55A0BE055FB6422240C2" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealizedGainLossOnInvestmentsTableTextBlock_D606722F9D0055C0A2C69FB7665F806F_terseLabel_en-US" xlink:label="lab_us-gaap_RealizedGainLossOnInvestmentsTableTextBlock_3ACCEC5624E2560EBC8F90758C5AE1CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components of Net Realized Gains Excluding OTTI Charges</link:label>
    <link:label id="lab_us-gaap_RealizedGainLossOnInvestmentsTableTextBlock_D606722F9D0055C0A2C69FB7665F806F_label_en-US" xlink:label="lab_us-gaap_RealizedGainLossOnInvestmentsTableTextBlock_3ACCEC5624E2560EBC8F90758C5AE1CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Gain (Loss) on Investments [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RealizedGainLossOnInvestmentsTableTextBlock" xlink:label="loc_us-gaap_RealizedGainLossOnInvestmentsTableTextBlock_3ACCEC5624E2560EBC8F90758C5AE1CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedGainLossOnInvestmentsTableTextBlock_3ACCEC5624E2560EBC8F90758C5AE1CA" xlink:to="lab_us-gaap_RealizedGainLossOnInvestmentsTableTextBlock_3ACCEC5624E2560EBC8F90758C5AE1CA" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestPaid_C2D8045265BA383EEBB2101EE67229BE_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaid_AE1496E3716C5E1A9EFCD6C7A2C1A15B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest</link:label>
    <link:label id="lab_us-gaap_InterestPaid_C2D8045265BA383EEBB2101EE67229BE_label_en-US" xlink:label="lab_us-gaap_InterestPaid_AE1496E3716C5E1A9EFCD6C7A2C1A15B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestPaid" xlink:label="loc_us-gaap_InterestPaid_AE1496E3716C5E1A9EFCD6C7A2C1A15B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaid_AE1496E3716C5E1A9EFCD6C7A2C1A15B" xlink:to="lab_us-gaap_InterestPaid_AE1496E3716C5E1A9EFCD6C7A2C1A15B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_71170F294E9AB75012B4101EE67285A6_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_3CD48B951D1D5EE19FA9C5DB9DFF2AC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal income tax</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_71170F294E9AB75012B4101EE67285A6_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_3CD48B951D1D5EE19FA9C5DB9DFF2AC6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_3CD48B951D1D5EE19FA9C5DB9DFF2AC6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_3CD48B951D1D5EE19FA9C5DB9DFF2AC6" xlink:to="lab_us-gaap_IncomeTaxesPaidNet_3CD48B951D1D5EE19FA9C5DB9DFF2AC6" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueOfAssetsAcquired_80A681149B80AAC66F43101EE672720A_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueOfAssetsAcquired_639BF3308F5E517F9505784DAD01452E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exchange of fixed income securities</link:label>
    <link:label id="lab_us-gaap_FairValueOfAssetsAcquired_80A681149B80AAC66F43101EE672720A_label_en-US" xlink:label="lab_us-gaap_FairValueOfAssetsAcquired_639BF3308F5E517F9505784DAD01452E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value of Assets Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueOfAssetsAcquired" xlink:label="loc_us-gaap_FairValueOfAssetsAcquired_639BF3308F5E517F9505784DAD01452E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueOfAssetsAcquired_639BF3308F5E517F9505784DAD01452E" xlink:to="lab_us-gaap_FairValueOfAssetsAcquired_639BF3308F5E517F9505784DAD01452E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConversionOfStockAmountConverted1_0826AC4F7F841448EB61101EE672468C_terseLabel_en-US" xlink:label="lab_us-gaap_ConversionOfStockAmountConverted1_450E0D47543B55F591F8FBC9365A35B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate actions related to equity securities, AFS</link:label>
    <link:label id="lab_us-gaap_ConversionOfStockAmountConverted1_0826AC4F7F841448EB61101EE672468C_label_en-US" xlink:label="lab_us-gaap_ConversionOfStockAmountConverted1_450E0D47543B55F591F8FBC9365A35B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Amount Converted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConversionOfStockAmountConverted1" xlink:label="loc_us-gaap_ConversionOfStockAmountConverted1_450E0D47543B55F591F8FBC9365A35B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConversionOfStockAmountConverted1_450E0D47543B55F591F8FBC9365A35B1" xlink:to="lab_us-gaap_ConversionOfStockAmountConverted1_450E0D47543B55F591F8FBC9365A35B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalLeaseObligationsIncurred_603F41553CBDEDB1114D101EE6727248_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsIncurred_E7878C43A8485F56872FE46EA36FAEB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets acquired under capital lease arrangements</link:label>
    <link:label id="lab_us-gaap_CapitalLeaseObligationsIncurred_603F41553CBDEDB1114D101EE6727248_label_en-US" xlink:label="lab_us-gaap_CapitalLeaseObligationsIncurred_E7878C43A8485F56872FE46EA36FAEB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Lease Obligations Incurred</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeaseObligationsIncurred" xlink:label="loc_us-gaap_CapitalLeaseObligationsIncurred_E7878C43A8485F56872FE46EA36FAEB0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalLeaseObligationsIncurred_E7878C43A8485F56872FE46EA36FAEB0" xlink:to="lab_us-gaap_CapitalLeaseObligationsIncurred_E7878C43A8485F56872FE46EA36FAEB0" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_940B7CD5DEC615C5D05E101EE672DD2B_terseLabel_en-US" xlink:label="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_8EEC70717BDF504DBA69A686D2ECF5BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-cash purchase of property and equipment</link:label>
    <link:label id="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_940B7CD5DEC615C5D05E101EE672DD2B_label_en-US" xlink:label="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_8EEC70717BDF504DBA69A686D2ECF5BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncash or Part Noncash Acquisition, Fixed Assets Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1" xlink:label="loc_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_8EEC70717BDF504DBA69A686D2ECF5BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_8EEC70717BDF504DBA69A686D2ECF5BA" xlink:to="lab_us-gaap_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1_8EEC70717BDF504DBA69A686D2ECF5BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_EC516772536A8E2F4A691024D4EBD96E_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_37B0708CB0CA5DEF8047C97990968802" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional paid-in capital [Member]</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_EC516772536A8E2F4A691024D4EBD96E_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_37B0708CB0CA5DEF8047C97990968802" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_37B0708CB0CA5DEF8047C97990968802" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalMember_37B0708CB0CA5DEF8047C97990968802" xlink:to="lab_us-gaap_AdditionalPaidInCapitalMember_37B0708CB0CA5DEF8047C97990968802" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsMember_B3BD75680848710DC1A71024D4EB9F5A_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_41E4EBBF7930561488896A385199C6EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained earnings [Member]</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsMember_B3BD75680848710DC1A71024D4EB9F5A_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_41E4EBBF7930561488896A385199C6EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_41E4EBBF7930561488896A385199C6EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember_41E4EBBF7930561488896A385199C6EF" xlink:to="lab_us-gaap_RetainedEarningsMember_41E4EBBF7930561488896A385199C6EF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_76882581FDA6D3C66CC11024D4EBD77A_verboseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_B59837D982295FEB89CC2B29D9CF4F38" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive (loss) income [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_B59837D982295FEB89CC2B29D9CF4F38" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_B59837D982295FEB89CC2B29D9CF4F38" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_B59837D982295FEB89CC2B29D9CF4F38" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockMember_64CD7E97421363F4425A1024D4EB3047_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockMember_06A81D6179605E8399F44D53D282EBC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Treasury stock [Member]</link:label>
    <link:label id="lab_us-gaap_TreasuryStockMember_64CD7E97421363F4425A1024D4EB3047_label_en-US" xlink:label="lab_us-gaap_TreasuryStockMember_06A81D6179605E8399F44D53D282EBC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_06A81D6179605E8399F44D53D282EBC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockMember_06A81D6179605E8399F44D53D282EBC8" xlink:to="lab_us-gaap_TreasuryStockMember_06A81D6179605E8399F44D53D282EBC8" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_F51BDCA4D81EF54803FB1024D4EB43A0_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_98757261AB5355CB9CDF10B09946BB1F" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_98757261AB5355CB9CDF10B09946BB1F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_98757261AB5355CB9CDF10B09946BB1F" xlink:to="lab_us-gaap_StockholdersEquity_98757261AB5355CB9CDF10B09946BB1F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_27EF108D92E9D81B1FB51024D4EBFFB0_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_19E45C8DAAE2589DA484306F27F715D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend reinvestment plan (shares: 28,607 &#8211; 2017; 38,741 &#8211; 2016; 50,013 &#8211; 2015)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_27EF108D92E9D81B1FB51024D4EBFFB0_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_19E45C8DAAE2589DA484306F27F715D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Dividend Reinvestment Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_19E45C8DAAE2589DA484306F27F715D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_19E45C8DAAE2589DA484306F27F715D5" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_19E45C8DAAE2589DA484306F27F715D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_C30DEF7D753AD412FC9F1024D4EB0D7E_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_8B5519B258BF5A099E0D92882CEE2914" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock purchase and compensation plans (shares: 635,521 &#8211; 2017; 720,323 &#8211; 2016; 863,426 &#8211; 2015)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_C30DEF7D753AD412FC9F1024D4EB0D7E_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_8B5519B258BF5A099E0D92882CEE2914" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_8B5519B258BF5A099E0D92882CEE2914" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_8B5519B258BF5A099E0D92882CEE2914" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_8B5519B258BF5A099E0D92882CEE2914" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsCommonStock_4F2A8D5083733F1A95DC1024D4ECE5B1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DividendsCommonStock_9F7584657AAF516BABED44D25E02FA95" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Dividends to stockholders ($0.66 per share &#8211; 2017; $0.61 per share &#8211; 2016; $0.57 per share &#8211; 2015)</link:label>
    <link:label id="lab_us-gaap_DividendsCommonStock_4F2A8D5083733F1A95DC1024D4ECE5B1_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStock_9F7584657AAF516BABED44D25E02FA95" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsCommonStock" xlink:label="loc_us-gaap_DividendsCommonStock_9F7584657AAF516BABED44D25E02FA95" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCommonStock_9F7584657AAF516BABED44D25E02FA95" xlink:to="lab_us-gaap_DividendsCommonStock_9F7584657AAF516BABED44D25E02FA95" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_5347E0B3E5EA86862D021024D4EC021A_negatedLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_BE649597DA3A5C7884C42ACD0FF36AA0" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Acquisition of treasury stock (shares: 136,205 &#8211; 2017; 152,595 &#8211; 2016; 147,461 &#8211; 2015)</link:label>
    <link:label id="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_5347E0B3E5EA86862D021024D4EC021A_label_en-US" xlink:label="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_BE649597DA3A5C7884C42ACD0FF36AA0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Value, Acquired, Cost Method</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_BE649597DA3A5C7884C42ACD0FF36AA0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_BE649597DA3A5C7884C42ACD0FF36AA0" xlink:to="lab_us-gaap_TreasuryStockValueAcquiredCostMethod_BE649597DA3A5C7884C42ACD0FF36AA0" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_D57AF64085525F8B56B51024D4ECE722_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_BBC972F955DE5C06AA6711135BB44615" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">End of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_BBC972F955DE5C06AA6711135BB44615" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_BBC972F955DE5C06AA6711135BB44615" xlink:to="lab_us-gaap_StockholdersEquity_BBC972F955DE5C06AA6711135BB44615" xlink:type="arc" />
    <link:label id="lab_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable_342C449A7989E5F53DB79FB6F2A15733_label_en-US" xlink:label="lab_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable_50750BF8D1015B549610CE6EF314488F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable" xlink:label="loc_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable_50750BF8D1015B549610CE6EF314488F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable_50750BF8D1015B549610CE6EF314488F" xlink:to="lab_us-gaap_CausesOfIncreaseDecreaseInLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseTable_50750BF8D1015B549610CE6EF314488F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_854B5E4DC24AA9E378759FB6F2A116BB_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_1259393F3A2751F3BA17A687C3874E23" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis" xlink:label="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_1259393F3A2751F3BA17A687C3874E23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_1259393F3A2751F3BA17A687C3874E23" xlink:to="lab_us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis_1259393F3A2751F3BA17A687C3874E23" xlink:type="arc" />
    <link:label id="lab_us-gaap_CatastrophicEventDomain_04867AEAB6F77554E13F9FB6F2A18C63_verboseLabel_en-US" xlink:label="lab_us-gaap_CatastrophicEventDomain_CAEFE187804C5FD3AC8AA27D486D5C5F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense, Cause [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CatastrophicEventDomain" xlink:label="loc_us-gaap_CatastrophicEventDomain_CAEFE187804C5FD3AC8AA27D486D5C5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CatastrophicEventDomain_CAEFE187804C5FD3AC8AA27D486D5C5F" xlink:to="lab_us-gaap_CatastrophicEventDomain_CAEFE187804C5FD3AC8AA27D486D5C5F" xlink:type="arc" />
    <link:label id="lab_sigi_ChangeinHistoricalClaimRateExperienceMember_642B523810BF839462F89FB6F2A1EBBA_terseLabel_en-US" xlink:label="lab_sigi_ChangeinHistoricalClaimRateExperienceMember_CE8C054FA1785EFE9AD7B08C7F71A591" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Favorable or unfavorable loss development [Member]</link:label>
    <link:label id="lab_sigi_ChangeinHistoricalClaimRateExperienceMember_642B523810BF839462F89FB6F2A1EBBA_label_en-US" xlink:label="lab_sigi_ChangeinHistoricalClaimRateExperienceMember_CE8C054FA1785EFE9AD7B08C7F71A591" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in Historical Claim Rate Experience [Member]</link:label>
    <link:label id="lab_sigi_ChangeinHistoricalClaimRateExperienceMember_642B523810BF839462F89FB6F2A1EBBA_documentation_en-US" xlink:label="lab_sigi_ChangeinHistoricalClaimRateExperienceMember_CE8C054FA1785EFE9AD7B08C7F71A591" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A noticeable change in the dollar volume of claims, such as a change in the frequency or number of claims, and the severity (dollar amount) of claims, that is deemed less than temporary, such that it influenced the entity to increase or decrease its claims reserves estimates.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ChangeinHistoricalClaimRateExperienceMember" xlink:label="loc_sigi_ChangeinHistoricalClaimRateExperienceMember_CE8C054FA1785EFE9AD7B08C7F71A591" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ChangeinHistoricalClaimRateExperienceMember_CE8C054FA1785EFE9AD7B08C7F71A591" xlink:to="lab_sigi_ChangeinHistoricalClaimRateExperienceMember_CE8C054FA1785EFE9AD7B08C7F71A591" xlink:type="arc" />
    <link:label id="lab_sigi_CasualtyInsuranceProductLineMember_BF35E9EB2C0E47DA796C9FB6F2A2982D_terseLabel_en-US" xlink:label="lab_sigi_CasualtyInsuranceProductLineMember_2FA768BF60A6530B8771B1C41B9F3ABD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Casualty Insurance Product Line [Member]</link:label>
    <link:label id="lab_sigi_CasualtyInsuranceProductLineMember_BF35E9EB2C0E47DA796C9FB6F2A2982D_label_en-US" xlink:label="lab_sigi_CasualtyInsuranceProductLineMember_2FA768BF60A6530B8771B1C41B9F3ABD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Casualty Insurance Product Line [Member]</link:label>
    <link:label id="lab_sigi_CasualtyInsuranceProductLineMember_BF35E9EB2C0E47DA796C9FB6F2A2982D_documentation_en-US" xlink:label="lab_sigi_CasualtyInsuranceProductLineMember_2FA768BF60A6530B8771B1C41B9F3ABD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Product line consisting of casualty-related insurance.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_CasualtyInsuranceProductLineMember" xlink:label="loc_sigi_CasualtyInsuranceProductLineMember_2FA768BF60A6530B8771B1C41B9F3ABD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_CasualtyInsuranceProductLineMember_2FA768BF60A6530B8771B1C41B9F3ABD" xlink:to="lab_sigi_CasualtyInsuranceProductLineMember_2FA768BF60A6530B8771B1C41B9F3ABD" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyInsuranceProductLineMember_08F75146B0EF64356C209FB6F2A25C98_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyInsuranceProductLineMember_48517D5EE169597B97ACEB9CEADB90C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property Insurance Product Line [Member]</link:label>
    <link:label id="lab_us-gaap_PropertyInsuranceProductLineMember_08F75146B0EF64356C209FB6F2A25C98_label_en-US" xlink:label="lab_us-gaap_PropertyInsuranceProductLineMember_48517D5EE169597B97ACEB9CEADB90C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property Insurance Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyInsuranceProductLineMember" xlink:label="loc_us-gaap_PropertyInsuranceProductLineMember_48517D5EE169597B97ACEB9CEADB90C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyInsuranceProductLineMember_48517D5EE169597B97ACEB9CEADB90C3" xlink:to="lab_us-gaap_PropertyInsuranceProductLineMember_48517D5EE169597B97ACEB9CEADB90C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherInsuranceProductLineMember_6E930A2C3069247E877F9FB6F2A38BDB_terseLabel_en-US" xlink:label="lab_us-gaap_OtherInsuranceProductLineMember_84163A4ACCEE5BA6BF78F5FCB8B2DE88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Insurance Product Line [Member]</link:label>
    <link:label id="lab_us-gaap_OtherInsuranceProductLineMember_6E930A2C3069247E877F9FB6F2A38BDB_label_en-US" xlink:label="lab_us-gaap_OtherInsuranceProductLineMember_84163A4ACCEE5BA6BF78F5FCB8B2DE88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Insurance Product Line [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherInsuranceProductLineMember" xlink:label="loc_us-gaap_OtherInsuranceProductLineMember_84163A4ACCEE5BA6BF78F5FCB8B2DE88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherInsuranceProductLineMember_84163A4ACCEE5BA6BF78F5FCB8B2DE88" xlink:to="lab_us-gaap_OtherInsuranceProductLineMember_84163A4ACCEE5BA6BF78F5FCB8B2DE88" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_17969245EC689C39B3049FB6F2A33B07_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_CD7768DB04B958FB96F0D61D5016F503" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_CD7768DB04B958FB96F0D61D5016F503" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_CD7768DB04B958FB96F0D61D5016F503" xlink:to="lab_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_CD7768DB04B958FB96F0D61D5016F503" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_BC9A5BFD3057005983E89FB6F2A3C89D_verboseLabel_en-US" xlink:label="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_9CFB1218B73456F6938E8DBB22B3559A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Favorable or adverse loss development</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_9CFB1218B73456F6938E8DBB22B3559A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_9CFB1218B73456F6938E8DBB22B3559A" xlink:to="lab_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_9CFB1218B73456F6938E8DBB22B3559A" xlink:type="arc" />
    <link:label id="lab_sigi_CasualtyDevelopment_650B4069F07C39B4AEEB9FB6F2A3BB81_terseLabel_en-US" xlink:label="lab_sigi_CasualtyDevelopment_977510FE15BF5B58B113B2D0C31BA991" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Casualty Development</link:label>
    <link:label id="lab_sigi_CasualtyDevelopment_650B4069F07C39B4AEEB9FB6F2A3BB81_label_en-US" xlink:label="lab_sigi_CasualtyDevelopment_977510FE15BF5B58B113B2D0C31BA991" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Casualty Development</link:label>
    <link:label id="lab_sigi_CasualtyDevelopment_650B4069F07C39B4AEEB9FB6F2A3BB81_documentation_en-US" xlink:label="lab_sigi_CasualtyDevelopment_977510FE15BF5B58B113B2D0C31BA991" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of provision in the period for casualty claims incurred in prior reporting periods and related claims settlement costs.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_CasualtyDevelopment" xlink:label="loc_sigi_CasualtyDevelopment_977510FE15BF5B58B113B2D0C31BA991" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_CasualtyDevelopment_977510FE15BF5B58B113B2D0C31BA991" xlink:to="lab_sigi_CasualtyDevelopment_977510FE15BF5B58B113B2D0C31BA991" xlink:type="arc" />
    <link:label id="lab_sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract_BDCD3A92DD733D2A6510101EE3F93F5E_label_en-US" xlink:label="lab_sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract_4B220DB2A3D850CBB569F0F2319CAEF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-Based Payment Shares Available for Issuance [Abstract]</link:label>
    <link:label id="lab_sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract_BDCD3A92DD733D2A6510101EE3F93F5E_documentation_en-US" xlink:label="lab_sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract_4B220DB2A3D850CBB569F0F2319CAEF4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-Based Payment Shares Available for Issuance [Abstract]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract" xlink:label="loc_sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract_4B220DB2A3D850CBB569F0F2319CAEF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract_4B220DB2A3D850CBB569F0F2319CAEF4" xlink:to="lab_sigi_ShareBasedPaymentSharesAvailableforIssuanceAbstract_4B220DB2A3D850CBB569F0F2319CAEF4" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_2D8229B8C3194594D206101EE3F99DFB_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_D623CD2E26E75AD7903132FD71A13CF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Available for Issuance [Table]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_2D8229B8C3194594D206101EE3F99DFB_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_D623CD2E26E75AD7903132FD71A13CF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Available for Issuance [Table]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_2D8229B8C3194594D206101EE3F99DFB_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_D623CD2E26E75AD7903132FD71A13CF8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Available for Issuance [Table]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable" xlink:label="loc_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_D623CD2E26E75AD7903132FD71A13CF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_D623CD2E26E75AD7903132FD71A13CF8" xlink:to="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceTable_D623CD2E26E75AD7903132FD71A13CF8" xlink:type="arc" />
    <link:label id="lab_sigi_OmnibusStockPlan2014Member_7230ED4CDB535BE31336101EE3F98DE0_terseLabel_en-US" xlink:label="lab_sigi_OmnibusStockPlan2014Member_87455F2F6019503DB53029D88F3A92A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Omnibus Stock Plan 2014 [Member]</link:label>
    <link:label id="lab_sigi_OmnibusStockPlan2014Member_7230ED4CDB535BE31336101EE3F98DE0_label_en-US" xlink:label="lab_sigi_OmnibusStockPlan2014Member_87455F2F6019503DB53029D88F3A92A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Omnibus Stock Plan 2014 [Member]</link:label>
    <link:label id="lab_sigi_OmnibusStockPlan2014Member_7230ED4CDB535BE31336101EE3F98DE0_documentation_en-US" xlink:label="lab_sigi_OmnibusStockPlan2014Member_87455F2F6019503DB53029D88F3A92A6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">An equity based payment arrangement in which one or more employees receive shares of stock (units), stock (unit) options, phantom stock, stock bonuses, stock appreciation rights, or other equity instruments for the 2014 plan.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OmnibusStockPlan2014Member" xlink:label="loc_sigi_OmnibusStockPlan2014Member_87455F2F6019503DB53029D88F3A92A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OmnibusStockPlan2014Member_87455F2F6019503DB53029D88F3A92A6" xlink:to="lab_sigi_OmnibusStockPlan2014Member_87455F2F6019503DB53029D88F3A92A6" xlink:type="arc" />
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_5282B97978D34110F61C101EE3FA3DA5_terseLabel_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_3B5D6299C353548A8A330D9ADF76242F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Available for Issuance [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_5282B97978D34110F61C101EE3FA3DA5_label_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_3B5D6299C353548A8A330D9ADF76242F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-Based Compensation Shares Available for Issuance [Line Items]</link:label>
    <link:label id="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_5282B97978D34110F61C101EE3FA3DA5_documentation_en-US" xlink:label="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_3B5D6299C353548A8A330D9ADF76242F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Line Items] for Schedule of Share-Based Compensation Shares Available for Issuance [Table]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems" xlink:label="loc_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_3B5D6299C353548A8A330D9ADF76242F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_3B5D6299C353548A8A330D9ADF76242F" xlink:to="lab_sigi_ScheduleofShareBasedCompensationSharesAvailableforIssuanceLineItems_3B5D6299C353548A8A330D9ADF76242F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_C00704FFA123DBA0802A101EE3FA93F9_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_8B2CA268A5055EE19749E0D6ECD7F7D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_C00704FFA123DBA0802A101EE3FA93F9_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_8B2CA268A5055EE19749E0D6ECD7F7D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_8B2CA268A5055EE19749E0D6ECD7F7D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_8B2CA268A5055EE19749E0D6ECD7F7D9" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_8B2CA268A5055EE19749E0D6ECD7F7D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_468AA83FAC343D66407D101EE3FA4924_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_1D3D59C64533517893E989B9661BF9CE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_1D3D59C64533517893E989B9661BF9CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_1D3D59C64533517893E989B9661BF9CE" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_1D3D59C64533517893E989B9661BF9CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashDividendsPaidToParentCompany_AF1B1E593A34626AA805C326092EBBFF_negatedLabel_en-US" xlink:label="lab_us-gaap_CashDividendsPaidToParentCompany_AF1B1E593A34626AA805C326092EBBFF" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Dividends from subsidaries</link:label>
    <link:label id="lab_us-gaap_CashDividendsPaidToParentCompany_AF1B1E593A34626AA805C326092EBBFF_label_en-US" xlink:label="lab_us-gaap_CashDividendsPaidToParentCompany_AF1B1E593A34626AA805C326092EBBFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Dividends Paid to Parent Company</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashDividendsPaidToParentCompany" xlink:label="loc_us-gaap_CashDividendsPaidToParentCompany_AF1B1E593A34626AA805C326092EBBFF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashDividendsPaidToParentCompany_AF1B1E593A34626AA805C326092EBBFF" xlink:to="lab_us-gaap_CashDividendsPaidToParentCompany_AF1B1E593A34626AA805C326092EBBFF" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherCostAndExpenseOperating_3D73BA0A7EA44DEC16D5C326092FEE39_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherCostAndExpenseOperating_3D73BA0A7EA44DEC16D5C326092FEE39" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other expenses</link:label>
    <link:label id="lab_us-gaap_OtherCostAndExpenseOperating_3D73BA0A7EA44DEC16D5C326092FEE39_label_en-US" xlink:label="lab_us-gaap_OtherCostAndExpenseOperating_3D73BA0A7EA44DEC16D5C326092FEE39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Cost and Expense, Operating</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_3D73BA0A7EA44DEC16D5C326092FEE39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherCostAndExpenseOperating_3D73BA0A7EA44DEC16D5C326092FEE39" xlink:to="lab_us-gaap_OtherCostAndExpenseOperating_3D73BA0A7EA44DEC16D5C326092FEE39" xlink:type="arc" />
    <link:label id="lab_us-gaap_BenefitsLossesAndExpenses_ED6E982561FF84BEA248C326092FF786_terseLabel_en-US" xlink:label="lab_us-gaap_BenefitsLossesAndExpenses_ED6E982561FF84BEA248C326092FF786" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BenefitsLossesAndExpenses" xlink:label="loc_us-gaap_BenefitsLossesAndExpenses_ED6E982561FF84BEA248C326092FF786" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BenefitsLossesAndExpenses_ED6E982561FF84BEA248C326092FF786" xlink:to="lab_us-gaap_BenefitsLossesAndExpenses_ED6E982561FF84BEA248C326092FF786" xlink:type="arc" />
    <link:label id="lab_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49_terseLabel_en-US" xlink:label="lab_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income before federal income tax</link:label>
    <link:label id="lab_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49_label_en-US" xlink:label="lab_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Loss From Continuing Operations Before Federal Income Tax</link:label>
    <link:label id="lab_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49_documentation_en-US" xlink:label="lab_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the income or loss from continuing operations attributable to the entity which may also be defined as revenue less expenses from ongoing operations before income taxes, equity in undistriibuted income of subsidiaries, dividends in excess of earnings, and extraordinary items.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax" xlink:label="loc_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49" xlink:to="lab_sigi_IncomeLossFromContinuingOperationsBeforeFederalIncomeTax_7E95CE436CA778A0D858C326092F1B49" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_BFC5DB8ECA622B987E02C326092FF748_verboseLabel_en-US" xlink:label="lab_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_BFC5DB8ECA622B987E02C326092FF748" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Federal income tax (benefit) expense:</link:label>
    <link:label id="lab_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_BFC5DB8ECA622B987E02C326092FF748_label_en-US" xlink:label="lab_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_BFC5DB8ECA622B987E02C326092FF748" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Income Tax Expense (Benefit), Continuing Operations [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_BFC5DB8ECA622B987E02C326092FF748" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_BFC5DB8ECA622B987E02C326092FF748" xlink:to="lab_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract_BFC5DB8ECA622B987E02C326092FF748" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_B172A85E51C70CA0AFD6C326092F0E99_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_B172A85E51C70CA0AFD6C326092F0E99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total federal income tax expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_B172A85E51C70CA0AFD6C326092F0E99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_B172A85E51C70CA0AFD6C326092F0E99" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_B172A85E51C70CA0AFD6C326092F0E99" xlink:type="arc" />
    <link:label id="lab_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28_terseLabel_en-US" xlink:label="lab_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income before equity in undistributed income of subsidiaries</link:label>
    <link:label id="lab_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28_label_en-US" xlink:label="lab_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income Loss From Continuing Operations Before Equity In Undistributed Income Of Subsidiaries</link:label>
    <link:label id="lab_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28_documentation_en-US" xlink:label="lab_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the income or loss from continuing operations attributable to the entity, after tax, which may also be defined as revenue less expenses from ongoing operations after income taxes, but before equity in undistributed income of subsidiaries and extraordinary items.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries" xlink:label="loc_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28" xlink:to="lab_sigi_NetIncomeLossFromContinuingOperationsBeforeEquityInUndistributedIncomeOfSubsidiaries_4C6D38CE2C199C2E1A4BC326092F3C28" xlink:type="arc" />
    <link:label id="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_5CF892B17CE02DA45F53C326092FBD81_terseLabel_en-US" xlink:label="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_5CF892B17CE02DA45F53C326092FBD81" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity In Undistributed Income Of Continuing Subsidiaries, Net Of Tax</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax" xlink:label="loc_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_5CF892B17CE02DA45F53C326092FBD81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_5CF892B17CE02DA45F53C326092FBD81" xlink:to="lab_sigi_EquityInUndistributedIncomeOfContinuingSubsidiariesNetOfTax_5CF892B17CE02DA45F53C326092FBD81" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_651C446D77EDF362C4F6101EE6B61152_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_1BB78190192A5743844A849726B045AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Quarterly Financial Information</link:label>
    <link:label id="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_651C446D77EDF362C4F6101EE6B61152_label_en-US" xlink:label="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_1BB78190192A5743844A849726B045AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quarterly Financial Information [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_1BB78190192A5743844A849726B045AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_1BB78190192A5743844A849726B045AA" xlink:to="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_1BB78190192A5743844A849726B045AA" xlink:type="arc" />
    <link:label id="lab_sigi_DividendsPaidToParentTable_FF58CD9C82F1DA218660816F59EBE744_terseLabel_en-US" xlink:label="lab_sigi_DividendsPaidToParentTable_455A796275E2567DBBAD3B91A2839F4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Paid To Parent [Table]</link:label>
    <link:label id="lab_sigi_DividendsPaidToParentTable_FF58CD9C82F1DA218660816F59EBE744_label_en-US" xlink:label="lab_sigi_DividendsPaidToParentTable_455A796275E2567DBBAD3B91A2839F4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Paid To Parent [Table]</link:label>
    <link:label id="lab_sigi_DividendsPaidToParentTable_FF58CD9C82F1DA218660816F59EBE744_documentation_en-US" xlink:label="lab_sigi_DividendsPaidToParentTable_455A796275E2567DBBAD3B91A2839F4D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of the dividends paid to the parent by an insurance subsidiary table.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DividendsPaidToParentTable" xlink:label="loc_sigi_DividendsPaidToParentTable_455A796275E2567DBBAD3B91A2839F4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DividendsPaidToParentTable_455A796275E2567DBBAD3B91A2839F4D" xlink:to="lab_sigi_DividendsPaidToParentTable_455A796275E2567DBBAD3B91A2839F4D" xlink:type="arc" />
    <link:label id="lab_sigi_DividendsPaidToParentAxis_A0723E31E8C039F6ACB9816F59EBEB50_terseLabel_en-US" xlink:label="lab_sigi_DividendsPaidToParentAxis_53A72F31B2E55153991F600998A8DFCB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Paid To Parent [Axis]</link:label>
    <link:label id="lab_sigi_DividendsPaidToParentAxis_A0723E31E8C039F6ACB9816F59EBEB50_label_en-US" xlink:label="lab_sigi_DividendsPaidToParentAxis_53A72F31B2E55153991F600998A8DFCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Paid To Parent [Axis]</link:label>
    <link:label id="lab_sigi_DividendsPaidToParentAxis_A0723E31E8C039F6ACB9816F59EBEB50_documentation_en-US" xlink:label="lab_sigi_DividendsPaidToParentAxis_53A72F31B2E55153991F600998A8DFCB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of the dividends paid to the parent by an insurance subsidiary axis.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DividendsPaidToParentAxis" xlink:label="loc_sigi_DividendsPaidToParentAxis_53A72F31B2E55153991F600998A8DFCB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DividendsPaidToParentAxis_53A72F31B2E55153991F600998A8DFCB" xlink:to="lab_sigi_DividendsPaidToParentAxis_53A72F31B2E55153991F600998A8DFCB" xlink:type="arc" />
    <link:label id="lab_sigi_DividendsPaidToParentDomain_261A630B61E0AE543F97816F59EBA391_terseLabel_en-US" xlink:label="lab_sigi_DividendsPaidToParentDomain_BF226174F874554EB1990AF93220EDD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Paid To Parent [Domain]</link:label>
    <link:label id="lab_sigi_DividendsPaidToParentDomain_261A630B61E0AE543F97816F59EBA391_label_en-US" xlink:label="lab_sigi_DividendsPaidToParentDomain_BF226174F874554EB1990AF93220EDD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Paid To Parent [Domain]</link:label>
    <link:label id="lab_sigi_DividendsPaidToParentDomain_261A630B61E0AE543F97816F59EBA391_documentation_en-US" xlink:label="lab_sigi_DividendsPaidToParentDomain_BF226174F874554EB1990AF93220EDD9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disclosure of the dividends paid to the parent by an insurance subsidiary domain.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DividendsPaidToParentDomain" xlink:label="loc_sigi_DividendsPaidToParentDomain_BF226174F874554EB1990AF93220EDD9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DividendsPaidToParentDomain_BF226174F874554EB1990AF93220EDD9" xlink:to="lab_sigi_DividendsPaidToParentDomain_BF226174F874554EB1990AF93220EDD9" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_87D4EF8FE8218B425A35816F59EBC921_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_D90327997BFA5A2183E2C3CBDD3EC260" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurace Company of America (SICA) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfAmericaMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfAmericaMember_D90327997BFA5A2183E2C3CBDD3EC260" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfAmericaMember_D90327997BFA5A2183E2C3CBDD3EC260" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfAmericaMember_D90327997BFA5A2183E2C3CBDD3EC260" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveWayInsuranceCompanyMember_6B13F1EDB51653CAED9E816F59EB2352_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveWayInsuranceCompanyMember_09C6633A73CE57C58FD8B4B7B4E28D0E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Way Insurance Company (SWIC) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveWayInsuranceCompanyMember" xlink:label="loc_sigi_SelectiveWayInsuranceCompanyMember_09C6633A73CE57C58FD8B4B7B4E28D0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveWayInsuranceCompanyMember_09C6633A73CE57C58FD8B4B7B4E28D0E" xlink:to="lab_sigi_SelectiveWayInsuranceCompanyMember_09C6633A73CE57C58FD8B4B7B4E28D0E" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_750D4438E6A7852E1B5A816F59EBB8F3_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_44F902AA3C8A5E20A1B26C42696B6EA0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of South Carolina (SICSC) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_44F902AA3C8A5E20A1B26C42696B6EA0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_44F902AA3C8A5E20A1B26C42696B6EA0" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfSouthCarolinaMember_44F902AA3C8A5E20A1B26C42696B6EA0" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_5CF39110BAA231C170F2816F59EBEA19_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_6758B4E1C3AA5D9E9943B7712CC42FC0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of the Southeast (SICSE) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfSoutheastMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfSoutheastMember_6758B4E1C3AA5D9E9943B7712CC42FC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfSoutheastMember_6758B4E1C3AA5D9E9943B7712CC42FC0" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfSoutheastMember_6758B4E1C3AA5D9E9943B7712CC42FC0" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_BFBC686EA8CDD9C69811816F59EBD548_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_417A2FE1A2D75C948927F96855AB5485" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of New York (SICNY) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfNewYorkMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfNewYorkMember_417A2FE1A2D75C948927F96855AB5485" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfNewYorkMember_417A2FE1A2D75C948927F96855AB5485" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfNewYorkMember_417A2FE1A2D75C948927F96855AB5485" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_E2C61637B9BDC1B8F70D816F59EB3C18_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_684F256298EF5D0088E6903B3575B0D0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Insurance Company of New England (SICNE) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveInsuranceCompanyOfNewEnglandMember" xlink:label="loc_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_684F256298EF5D0088E6903B3575B0D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_684F256298EF5D0088E6903B3575B0D0" xlink:to="lab_sigi_SelectiveInsuranceCompanyOfNewEnglandMember_684F256298EF5D0088E6903B3575B0D0" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_AFB042ABD32C0BD25C67816F59EBAAFC_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_E84144DDDEA852B284ABD50DBC45A437" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Auto Insurance Company of New Jersey (SAICNJ) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember" xlink:label="loc_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_E84144DDDEA852B284ABD50DBC45A437" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_E84144DDDEA852B284ABD50DBC45A437" xlink:to="lab_sigi_SelectiveAutoInsuranceCompanyOfNewJerseyMember_E84144DDDEA852B284ABD50DBC45A437" xlink:type="arc" />
    <link:label id="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_EBD29FDD2B45BFF4A9A2816F59EBD329_verboseLabel_en-US" xlink:label="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_48A6C463D1315EB4AC3882EB3B9D4806" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Mesa Underwriting Specialty Insurance Company (MUSIC) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember" xlink:label="loc_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_48A6C463D1315EB4AC3882EB3B9D4806" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_48A6C463D1315EB4AC3882EB3B9D4806" xlink:to="lab_sigi_MesaUnderwritingSpecialtyInsuranceCompanyMember_48A6C463D1315EB4AC3882EB3B9D4806" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_E103B5C7114E0A3C4BA8816F59EB4C34_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_B22E896A93D8558DB390DC28069AEB72" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Casualty Insurance Company (SCIC) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveCasualtyInsuranceCompanyMember" xlink:label="loc_sigi_SelectiveCasualtyInsuranceCompanyMember_B22E896A93D8558DB390DC28069AEB72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveCasualtyInsuranceCompanyMember_B22E896A93D8558DB390DC28069AEB72" xlink:to="lab_sigi_SelectiveCasualtyInsuranceCompanyMember_B22E896A93D8558DB390DC28069AEB72" xlink:type="arc" />
    <link:label id="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_EF107A0D834BFB16C5AA816F59EB90CF_verboseLabel_en-US" xlink:label="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_050C28CD3E7C59999E65E568674DB1C1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Selective Fire and Casualty Insurance Company (SFCIC) [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SelectiveFireAndCasualtyInsuranceCompanyMember" xlink:label="loc_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_050C28CD3E7C59999E65E568674DB1C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_050C28CD3E7C59999E65E568674DB1C1" xlink:to="lab_sigi_SelectiveFireAndCasualtyInsuranceCompanyMember_050C28CD3E7C59999E65E568674DB1C1" xlink:type="arc" />
    <link:label id="lab_sigi_OrdinaryDividendsPaidToParent_0514EDA9BFEB6D182F1D81854A45A86C_terseLabel_en-US" xlink:label="lab_sigi_OrdinaryDividendsPaidToParent_C6D4198A5ED450FFB3EAC1E846F40951" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ordinary Dividends Paid To Parent</link:label>
    <link:label id="lab_sigi_OrdinaryDividendsPaidToParent_0514EDA9BFEB6D182F1D81854A45A86C_label_en-US" xlink:label="lab_sigi_OrdinaryDividendsPaidToParent_C6D4198A5ED450FFB3EAC1E846F40951" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ordinary Dividends Paid To Parent</link:label>
    <link:label id="lab_sigi_OrdinaryDividendsPaidToParent_0514EDA9BFEB6D182F1D81854A45A86C_documentation_en-US" xlink:label="lab_sigi_OrdinaryDividendsPaidToParent_C6D4198A5ED450FFB3EAC1E846F40951" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents disclosure of the ordinary dividends paid to the parent company.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OrdinaryDividendsPaidToParent" xlink:label="loc_sigi_OrdinaryDividendsPaidToParent_C6D4198A5ED450FFB3EAC1E846F40951" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OrdinaryDividendsPaidToParent_C6D4198A5ED450FFB3EAC1E846F40951" xlink:to="lab_sigi_OrdinaryDividendsPaidToParent_C6D4198A5ED450FFB3EAC1E846F40951" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashDividendsPaidToParentCompany_C4497AF74A0650C16489816F59EB24B2_terseLabel_en-US" xlink:label="lab_us-gaap_CashDividendsPaidToParentCompany_8F6977BCA80A5E8CBC5ED9C2F214EFFA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ordinary dividends paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashDividendsPaidToParentCompany" xlink:label="loc_us-gaap_CashDividendsPaidToParentCompany_8F6977BCA80A5E8CBC5ED9C2F214EFFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashDividendsPaidToParentCompany_8F6977BCA80A5E8CBC5ED9C2F214EFFA" xlink:to="lab_us-gaap_CashDividendsPaidToParentCompany_8F6977BCA80A5E8CBC5ED9C2F214EFFA" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval_987A7A5EE452900F5924816F59EB4A7A_terseLabel_en-US" xlink:label="lab_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval_4F46841F90025917B168D10497763DA1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum ordinary dividends</link:label>
    <link:label id="lab_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval_987A7A5EE452900F5924816F59EB4A7A_label_en-US" xlink:label="lab_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval_4F46841F90025917B168D10497763DA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statutory Accounting Practices, Statutory Amount Available for Dividend Payments with Regulatory Approval</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval_4F46841F90025917B168D10497763DA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval_4F46841F90025917B168D10497763DA1" xlink:to="lab_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval_4F46841F90025917B168D10497763DA1" xlink:type="arc" />
    <link:label id="lab_sigi_AdditionalBorrowingCapacityForParent_F6B8A990E894F314CF28816F59EB2C19_terseLabel_en-US" xlink:label="lab_sigi_AdditionalBorrowingCapacityForParent_F316B6F70E235A45AE4B4364BABFA9B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional Borrowing Capacity for Parent</link:label>
    <link:label id="lab_sigi_AdditionalBorrowingCapacityForParent_F6B8A990E894F314CF28816F59EB2C19_label_en-US" xlink:label="lab_sigi_AdditionalBorrowingCapacityForParent_F316B6F70E235A45AE4B4364BABFA9B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Borrowing Capacity for Parent</link:label>
    <link:label id="lab_sigi_AdditionalBorrowingCapacityForParent_F6B8A990E894F314CF28816F59EB2C19_documentation_en-US" xlink:label="lab_sigi_AdditionalBorrowingCapacityForParent_F316B6F70E235A45AE4B4364BABFA9B4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The additional borrowing capacity for the Parent from the Indiana Subsidiaries.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AdditionalBorrowingCapacityForParent" xlink:label="loc_sigi_AdditionalBorrowingCapacityForParent_F316B6F70E235A45AE4B4364BABFA9B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AdditionalBorrowingCapacityForParent_F316B6F70E235A45AE4B4364BABFA9B4" xlink:to="lab_sigi_AdditionalBorrowingCapacityForParent_F316B6F70E235A45AE4B4364BABFA9B4" xlink:type="arc" />
    <link:label id="lab_sigi_MaximumBorrowingPercentage_7090890862529D59DC3F816F59EB0664_terseLabel_en-US" xlink:label="lab_sigi_MaximumBorrowingPercentage_9C1D319CBFDD500AA089074CDB969454" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum borrowing percentage</link:label>
    <link:label id="lab_sigi_MaximumBorrowingPercentage_7090890862529D59DC3F816F59EB0664_label_en-US" xlink:label="lab_sigi_MaximumBorrowingPercentage_9C1D319CBFDD500AA089074CDB969454" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum borrowing percentage</link:label>
    <link:label id="lab_sigi_MaximumBorrowingPercentage_7090890862529D59DC3F816F59EB0664_documentation_en-US" xlink:label="lab_sigi_MaximumBorrowingPercentage_9C1D319CBFDD500AA089074CDB969454" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum collaterized borrowing percentage from SISE and SISC admitted assets</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_MaximumBorrowingPercentage" xlink:label="loc_sigi_MaximumBorrowingPercentage_9C1D319CBFDD500AA089074CDB969454" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_MaximumBorrowingPercentage_9C1D319CBFDD500AA089074CDB969454" xlink:to="lab_sigi_MaximumBorrowingPercentage_9C1D319CBFDD500AA089074CDB969454" xlink:type="arc" />
    <link:label id="lab_sigi_NewJerseyDividendRestriction_DD9E1DCF2BF645B7F622816F59EB257C_terseLabel_en-US" xlink:label="lab_sigi_NewJerseyDividendRestriction_0E56E7978DC15365A0DBC5D46AB2E270" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New Jersey Dividend Restriction</link:label>
    <link:label id="lab_sigi_NewJerseyDividendRestriction_DD9E1DCF2BF645B7F622816F59EB257C_label_en-US" xlink:label="lab_sigi_NewJerseyDividendRestriction_0E56E7978DC15365A0DBC5D46AB2E270" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Jersey Dividend Restriction</link:label>
    <link:label id="lab_sigi_NewJerseyDividendRestriction_DD9E1DCF2BF645B7F622816F59EB257C_documentation_en-US" xlink:label="lab_sigi_NewJerseyDividendRestriction_0E56E7978DC15365A0DBC5D46AB2E270" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage used in New Jersey's dividend restriction calculation.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NewJerseyDividendRestriction" xlink:label="loc_sigi_NewJerseyDividendRestriction_0E56E7978DC15365A0DBC5D46AB2E270" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NewJerseyDividendRestriction_0E56E7978DC15365A0DBC5D46AB2E270" xlink:to="lab_sigi_NewJerseyDividendRestriction_0E56E7978DC15365A0DBC5D46AB2E270" xlink:type="arc" />
    <link:label id="lab_sigi_NewYorkDividendRestriction_720204384F2F14DF181D816F59EB6F21_terseLabel_en-US" xlink:label="lab_sigi_NewYorkDividendRestriction_39D7C4D3BD65528480451FA024573690" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New York Dividend Restriction</link:label>
    <link:label id="lab_sigi_NewYorkDividendRestriction_720204384F2F14DF181D816F59EB6F21_label_en-US" xlink:label="lab_sigi_NewYorkDividendRestriction_39D7C4D3BD65528480451FA024573690" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New York Dividend Restriction</link:label>
    <link:label id="lab_sigi_NewYorkDividendRestriction_720204384F2F14DF181D816F59EB6F21_documentation_en-US" xlink:label="lab_sigi_NewYorkDividendRestriction_39D7C4D3BD65528480451FA024573690" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage used in New York's dividend restriction calculation.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NewYorkDividendRestriction" xlink:label="loc_sigi_NewYorkDividendRestriction_39D7C4D3BD65528480451FA024573690" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NewYorkDividendRestriction_39D7C4D3BD65528480451FA024573690" xlink:to="lab_sigi_NewYorkDividendRestriction_39D7C4D3BD65528480451FA024573690" xlink:type="arc" />
    <link:label id="lab_sigi_DividendRestrictionNewYork_6763D60AA1821AD9EC64816F59EB6E7D_terseLabel_en-US" xlink:label="lab_sigi_DividendRestrictionNewYork_7826207A6E2D5A1DBAA7492C091EFC26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend Restriction New York</link:label>
    <link:label id="lab_sigi_DividendRestrictionNewYork_6763D60AA1821AD9EC64816F59EB6E7D_label_en-US" xlink:label="lab_sigi_DividendRestrictionNewYork_7826207A6E2D5A1DBAA7492C091EFC26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividend Restriction New York</link:label>
    <link:label id="lab_sigi_DividendRestrictionNewYork_6763D60AA1821AD9EC64816F59EB6E7D_documentation_en-US" xlink:label="lab_sigi_DividendRestrictionNewYork_7826207A6E2D5A1DBAA7492C091EFC26" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage used in New York's dividend restriction calculation.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DividendRestrictionNewYork" xlink:label="loc_sigi_DividendRestrictionNewYork_7826207A6E2D5A1DBAA7492C091EFC26" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DividendRestrictionNewYork_7826207A6E2D5A1DBAA7492C091EFC26" xlink:to="lab_sigi_DividendRestrictionNewYork_7826207A6E2D5A1DBAA7492C091EFC26" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A5A7AE477B21CC783A4B816F5A872CCF_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_9A9042D7E62A5429ADE43000AA5BF4DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Compensation Plan Contributions By Employer</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_9A9042D7E62A5429ADE43000AA5BF4DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_9A9042D7E62A5429ADE43000AA5BF4DE" xlink:to="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_9A9042D7E62A5429ADE43000AA5BF4DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_11E7924F4D571194D8CD8C98B497A5A5_verboseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_0718DDEB2E21599BBB921532F147C65C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fixed income securities, held-to-maturity &#8211; at carrying value (fair value: $44,100 &#8211; 2017; $105,211 &#8211; 2016)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_0718DDEB2E21599BBB921532F147C65C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecurities_0718DDEB2E21599BBB921532F147C65C" xlink:to="lab_us-gaap_HeldToMaturitySecurities_0718DDEB2E21599BBB921532F147C65C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_12E1452781943DC001968C98B4971452_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D25155E497D35D6DA9DCD68AE134618F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed income securities, available-for-sale &#8211; at fair value (amortized cost: $5,076,716 &#8211; 2017; $4,753,759 &#8211; 2016)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D25155E497D35D6DA9DCD68AE134618F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D25155E497D35D6DA9DCD68AE134618F" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_D25155E497D35D6DA9DCD68AE134618F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_71DB9E74A628C81F8D668C98B497E943_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_84757256F2FC59078B501047D6E12F00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity securities, available-for-sale &#8211; at fair value (cost: $143,811 &#8211; 2017; $120,889 &#8211; 2016)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesEquitySecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_84757256F2FC59078B501047D6E12F00" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesEquitySecurities_84757256F2FC59078B501047D6E12F00" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesEquitySecurities_84757256F2FC59078B501047D6E12F00" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherShortTermInvestments_BE64EB9F57359EF95C678C98B497769D_terseLabel_en-US" xlink:label="lab_us-gaap_OtherShortTermInvestments_E9DEFB8EDB74571789BADC8FF2F9B305" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term investments (at cost which approximates fair value)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherShortTermInvestments" xlink:label="loc_us-gaap_OtherShortTermInvestments_E9DEFB8EDB74571789BADC8FF2F9B305" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherShortTermInvestments_E9DEFB8EDB74571789BADC8FF2F9B305" xlink:to="lab_us-gaap_OtherShortTermInvestments_E9DEFB8EDB74571789BADC8FF2F9B305" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherInvestments_4FF05CDC79E12C0E23E18C98B498A104_terseLabel_en-US" xlink:label="lab_us-gaap_OtherInvestments_17A3997D55A25149B32356FD9A2B3B22" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherInvestments" xlink:label="loc_us-gaap_OtherInvestments_17A3997D55A25149B32356FD9A2B3B22" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherInvestments_17A3997D55A25149B32356FD9A2B3B22" xlink:to="lab_us-gaap_OtherInvestments_17A3997D55A25149B32356FD9A2B3B22" xlink:type="arc" />
    <link:label id="lab_us-gaap_Investments_1B33BE4297D4347820158C98B49856DB_totalLabel_en-US" xlink:label="lab_us-gaap_Investments_E93BDC576BA55E30B93A368873979D80" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total investments (Notes 5 and 7)</link:label>
    <link:label id="lab_us-gaap_Investments_1B33BE4297D4347820158C98B49856DB_label_en-US" xlink:label="lab_us-gaap_Investments_E93BDC576BA55E30B93A368873979D80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Investments" xlink:label="loc_us-gaap_Investments_E93BDC576BA55E30B93A368873979D80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Investments_E93BDC576BA55E30B93A368873979D80" xlink:to="lab_us-gaap_Investments_E93BDC576BA55E30B93A368873979D80" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccruedInvestmentIncomeReceivable_B4CACA860B433735AA3D8C98B4985DA0_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedInvestmentIncomeReceivable_3B8D22445E6B51CC88BB3A6E994AB3D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and dividends due or accrued</link:label>
    <link:label id="lab_us-gaap_AccruedInvestmentIncomeReceivable_B4CACA860B433735AA3D8C98B4985DA0_label_en-US" xlink:label="lab_us-gaap_AccruedInvestmentIncomeReceivable_3B8D22445E6B51CC88BB3A6E994AB3D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Investment Income Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedInvestmentIncomeReceivable" xlink:label="loc_us-gaap_AccruedInvestmentIncomeReceivable_3B8D22445E6B51CC88BB3A6E994AB3D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedInvestmentIncomeReceivable_3B8D22445E6B51CC88BB3A6E994AB3D8" xlink:to="lab_us-gaap_AccruedInvestmentIncomeReceivable_3B8D22445E6B51CC88BB3A6E994AB3D8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PremiumsReceivableAtCarryingValue_E0AAEA443FDAA5BC80A98C98B4992F8E_terseLabel_en-US" xlink:label="lab_us-gaap_PremiumsReceivableAtCarryingValue_92F80C809B405E1891082E4F0010C8ED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premiums receivable, net of allowance for uncollectible accounts of: $10,000 &#8211; 2017; $5,980 &#8211; 2016</link:label>
    <link:label id="lab_us-gaap_PremiumsReceivableAtCarryingValue_E0AAEA443FDAA5BC80A98C98B4992F8E_label_en-US" xlink:label="lab_us-gaap_PremiumsReceivableAtCarryingValue_92F80C809B405E1891082E4F0010C8ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Premiums Receivable, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PremiumsReceivableAtCarryingValue" xlink:label="loc_us-gaap_PremiumsReceivableAtCarryingValue_92F80C809B405E1891082E4F0010C8ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PremiumsReceivableAtCarryingValue_92F80C809B405E1891082E4F0010C8ED" xlink:to="lab_us-gaap_PremiumsReceivableAtCarryingValue_92F80C809B405E1891082E4F0010C8ED" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReinsuranceRecoverables_809C0F9AAD1D78AE6E6E8C98B499528A_terseLabel_en-US" xlink:label="lab_us-gaap_ReinsuranceRecoverables_98FBD3F877A25E01BA1E8E5D1206AF5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reinsurance recoverable, net of allowance for uncollectible accounts of: $4,600 &#8211; 2017; $5,500 &#8211; 2016 (Note 8)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReinsuranceRecoverables" xlink:label="loc_us-gaap_ReinsuranceRecoverables_98FBD3F877A25E01BA1E8E5D1206AF5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReinsuranceRecoverables_98FBD3F877A25E01BA1E8E5D1206AF5C" xlink:to="lab_us-gaap_ReinsuranceRecoverables_98FBD3F877A25E01BA1E8E5D1206AF5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_PrepaidReinsurancePremiums_41051CBE5B7FF6A9C8AF8C98B4996770_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidReinsurancePremiums_6A2A6171F3FC5769B53B173C41AC95F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid reinsurance premiums (Note 8)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrepaidReinsurancePremiums" xlink:label="loc_us-gaap_PrepaidReinsurancePremiums_6A2A6171F3FC5769B53B173C41AC95F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidReinsurancePremiums_6A2A6171F3FC5769B53B173C41AC95F2" xlink:to="lab_us-gaap_PrepaidReinsurancePremiums_6A2A6171F3FC5769B53B173C41AC95F2" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReceivable_1B2F5B3A438743BC6F5C8C98B499076B_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReceivable_DFBDDD4D7C675FF2864A7304A656DC2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current federal income tax (Note 13)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReceivable" xlink:label="loc_us-gaap_IncomeTaxReceivable_DFBDDD4D7C675FF2864A7304A656DC2F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReceivable_DFBDDD4D7C675FF2864A7304A656DC2F" xlink:to="lab_us-gaap_IncomeTaxReceivable_DFBDDD4D7C675FF2864A7304A656DC2F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsNet_7A04D2A9A709586C98E18C98B499B79B_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNet_218F65145733584F9E6AC428F3F3D5C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred federal income tax (Note 13)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_218F65145733584F9E6AC428F3F3D5C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_218F65145733584F9E6AC428F3F3D5C1" xlink:to="lab_us-gaap_DeferredTaxAssetsNet_218F65145733584F9E6AC428F3F3D5C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_2C77AFB98C159B006B3D8C98B4998CC4_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_730AD69FB64D508BBB18EA1D66144D2C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property and equipment &#8211; at cost, net of accumulated depreciation and amortization of: $213,227 &#8211; 2017; $198,729 &#8211; 2016</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_2C77AFB98C159B006B3D8C98B4998CC4_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_730AD69FB64D508BBB18EA1D66144D2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_730AD69FB64D508BBB18EA1D66144D2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_730AD69FB64D508BBB18EA1D66144D2C" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_730AD69FB64D508BBB18EA1D66144D2C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredPolicyAcquisitionCosts_B0720C5ECF599D2510F08C98B49A4D50_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCosts_1ABEA3C3EBE550A78B9A87AED69378BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred policy acquisition costs (Note 2)</link:label>
    <link:label id="lab_us-gaap_DeferredPolicyAcquisitionCosts_B0720C5ECF599D2510F08C98B49A4D50_label_en-US" xlink:label="lab_us-gaap_DeferredPolicyAcquisitionCosts_1ABEA3C3EBE550A78B9A87AED69378BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Policy Acquisition Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredPolicyAcquisitionCosts" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCosts_1ABEA3C3EBE550A78B9A87AED69378BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCosts_1ABEA3C3EBE550A78B9A87AED69378BF" xlink:to="lab_us-gaap_DeferredPolicyAcquisitionCosts_1ABEA3C3EBE550A78B9A87AED69378BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_A6F5C24F6EE6E70573938C98B49A7C2E_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_8C098A6D43A15FD5801320FCA71288B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill (Note 11)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_8C098A6D43A15FD5801320FCA71288B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_8C098A6D43A15FD5801320FCA71288B9" xlink:to="lab_us-gaap_Goodwill_8C098A6D43A15FD5801320FCA71288B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_27B0DD669E3A902CFB948C98B49B2090_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A6533377BACE5C28974835965105A930" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES AND STOCKHOLDERS&#8217; EQUITY</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A6533377BACE5C28974835965105A930" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A6533377BACE5C28974835965105A930" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_A6533377BACE5C28974835965105A930" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_952F97E967143A574A9F8C98B49BE199_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_101C3598C66E54188C9B466194645F5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reserve for loss and loss expense (Note 9)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_101C3598C66E54188C9B466194645F5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_101C3598C66E54188C9B466194645F5C" xlink:to="lab_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability_101C3598C66E54188C9B466194645F5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnearnedPremiums_6E51196EF4FA98ECD5748C98B49B8763_terseLabel_en-US" xlink:label="lab_us-gaap_UnearnedPremiums_621A2E966FB451288122E09180940FF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unearned premiums</link:label>
    <link:label id="lab_us-gaap_UnearnedPremiums_6E51196EF4FA98ECD5748C98B49B8763_label_en-US" xlink:label="lab_us-gaap_UnearnedPremiums_621A2E966FB451288122E09180940FF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unearned Premiums</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnearnedPremiums" xlink:label="loc_us-gaap_UnearnedPremiums_621A2E966FB451288122E09180940FF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnearnedPremiums_621A2E966FB451288122E09180940FF4" xlink:to="lab_us-gaap_UnearnedPremiums_621A2E966FB451288122E09180940FF4" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebt_3A46B0060A68FBE86C488C98B49BD1BF_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt_0479E8C8157E5D528A45282DDD4A98DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term debt (Note 10)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_0479E8C8157E5D528A45282DDD4A98DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt_0479E8C8157E5D528A45282DDD4A98DC" xlink:to="lab_us-gaap_LongTermDebt_0479E8C8157E5D528A45282DDD4A98DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccruedSalariesCurrentAndNoncurrent_4AE3DE6CB8F95680959F8C98B49CCDBB_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedSalariesCurrentAndNoncurrent_5F473F0082645794914A4BA8EE788A6C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued salaries and benefits</link:label>
    <link:label id="lab_us-gaap_AccruedSalariesCurrentAndNoncurrent_4AE3DE6CB8F95680959F8C98B49CCDBB_label_en-US" xlink:label="lab_us-gaap_AccruedSalariesCurrentAndNoncurrent_5F473F0082645794914A4BA8EE788A6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Salaries</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedSalariesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedSalariesCurrentAndNoncurrent_5F473F0082645794914A4BA8EE788A6C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedSalariesCurrentAndNoncurrent_5F473F0082645794914A4BA8EE788A6C" xlink:to="lab_us-gaap_AccruedSalariesCurrentAndNoncurrent_5F473F0082645794914A4BA8EE788A6C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_44886016E461B0FDA9E58C98B49CF26F_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_C2522BB4D4445FB8902ED400BCF2B069" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional paid-in capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_C2522BB4D4445FB8902ED400BCF2B069" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalCommonStock_C2522BB4D4445FB8902ED400BCF2B069" xlink:to="lab_us-gaap_AdditionalPaidInCapitalCommonStock_C2522BB4D4445FB8902ED400BCF2B069" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3755CD7940F1E76AD3898C98B49DBB8C_verboseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_762D028FD0275056877F8B2346004761" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive income (loss) (Note 6)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_762D028FD0275056877F8B2346004761" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_762D028FD0275056877F8B2346004761" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_762D028FD0275056877F8B2346004761" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockValue_B4C87F78E76AB6B4B7918C98B49DBB60_negatedLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_508E26EA50765ABF9A5424D34264567D" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Treasury stock &#8211; at cost (shares: 43,789,442 &#8211; 2017; 43,653,237 &#8211; 2016)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_508E26EA50765ABF9A5424D34264567D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockValue_508E26EA50765ABF9A5424D34264567D" xlink:to="lab_us-gaap_TreasuryStockValue_508E26EA50765ABF9A5424D34264567D" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_13B0DABAD2492BC8FCD38C98B49E714D_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_5E72371A100A54E380F344ADF022C1C5" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total stockholders&#8217; equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_5E72371A100A54E380F344ADF022C1C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_5E72371A100A54E380F344ADF022C1C5" xlink:to="lab_us-gaap_StockholdersEquity_5E72371A100A54E380F344ADF022C1C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_1C07DDAE1730C918AC108C98B49EA967_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_847B4B1499FA54788B217D0B21B5D1BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments and contingencies (Notes 17 and 18)</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_1C07DDAE1730C918AC108C98B49EA967_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_847B4B1499FA54788B217D0B21B5D1BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_847B4B1499FA54788B217D0B21B5D1BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies_847B4B1499FA54788B217D0B21B5D1BB" xlink:to="lab_us-gaap_CommitmentsAndContingencies_847B4B1499FA54788B217D0B21B5D1BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_7F01E464E08506B58D5C8C98B49EE5F9_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_A3CB773A04C15B15BF203C4E07A258D3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities and stockholders&#8217; equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_A3CB773A04C15B15BF203C4E07A258D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_A3CB773A04C15B15BF203C4E07A258D3" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity_A3CB773A04C15B15BF203C4E07A258D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentTable_83AE1502CA1D4499387B8D2D6D5FC444_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable_4384A208403E5F6B830C73E3791C7648" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTable_83AE1502CA1D4499387B8D2D6D5FC444_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable_4384A208403E5F6B830C73E3791C7648" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_4384A208403E5F6B830C73E3791C7648" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentTable_4384A208403E5F6B830C73E3791C7648" xlink:to="lab_us-gaap_DebtInstrumentTable_4384A208403E5F6B830C73E3791C7648" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortTermDebtTypeAxis_2E8FC5D115E4A607BE038D2D6D5F6481_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_CA6BA5ADB62558E399F9561DE0B5F760" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_ShortTermDebtTypeAxis_2E8FC5D115E4A607BE038D2D6D5F6481_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_CA6BA5ADB62558E399F9561DE0B5F760" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_CA6BA5ADB62558E399F9561DE0B5F760" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_CA6BA5ADB62558E399F9561DE0B5F760" xlink:to="lab_us-gaap_ShortTermDebtTypeAxis_CA6BA5ADB62558E399F9561DE0B5F760" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShortTermDebtTypeDomain_0DD70776D7DD45A93BEF8D2D6D5F7EB6_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_66B7A19406315DB2838F4E2C63B43248" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ShortTermDebtTypeDomain_0DD70776D7DD45A93BEF8D2D6D5F7EB6_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_66B7A19406315DB2838F4E2C63B43248" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_66B7A19406315DB2838F4E2C63B43248" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_66B7A19406315DB2838F4E2C63B43248" xlink:to="lab_us-gaap_ShortTermDebtTypeDomain_66B7A19406315DB2838F4E2C63B43248" xlink:type="arc" />
    <link:label id="lab_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_4DC3AC23A76A479A3EC28D2D6D5F0C84_terseLabel_en-US" xlink:label="lab_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_FA950894D1155986ABAE3DA97B414254" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Zero Point Seventy Five Percent Borrowing From Federal Home Loan Bank Due March 21, 2017 [Member]</link:label>
    <link:label id="lab_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_4DC3AC23A76A479A3EC28D2D6D5F0C84_label_en-US" xlink:label="lab_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_FA950894D1155986ABAE3DA97B414254" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Zero Point Seventy Five Percent Borrowing From Federal Home Loan Bank Due March 21, 2017 [Member]</link:label>
    <link:label id="lab_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_4DC3AC23A76A479A3EC28D2D6D5F0C84_documentation_en-US" xlink:label="lab_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_FA950894D1155986ABAE3DA97B414254" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Zero Point Seventy Five Percent Borrowing From Federal Home Loan Bank Due March 21, 2017</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member" xlink:label="loc_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_FA950894D1155986ABAE3DA97B414254" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_FA950894D1155986ABAE3DA97B414254" xlink:to="lab_sigi_ZeroPointSeventyFivePercentBorrowingFromFederalHomeLoanBankDueMarch212017Member_FA950894D1155986ABAE3DA97B414254" xlink:type="arc" />
    <link:label id="lab_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_0E46B69C7095AD1AF0C08D2D6D5F0FB1_terseLabel_en-US" xlink:label="lab_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_07B55947F1065E3FB7C4BEE1DBC9CEFD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One Point Two Nine Percent Borrowing From Federal Home Loan Bank Due November 15, 2017 [Member]</link:label>
    <link:label id="lab_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_0E46B69C7095AD1AF0C08D2D6D5F0FB1_label_en-US" xlink:label="lab_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_07B55947F1065E3FB7C4BEE1DBC9CEFD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One Point Two Nine Percent Borrowing From Federal Home Loan Bank Due November 15, 2017 [Member]</link:label>
    <link:label id="lab_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_0E46B69C7095AD1AF0C08D2D6D5F0FB1_documentation_en-US" xlink:label="lab_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_07B55947F1065E3FB7C4BEE1DBC9CEFD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One Point Two Nine Percent Borrowing From Federal Home Loan Bank Due November 15, 2017 [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member" xlink:label="loc_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_07B55947F1065E3FB7C4BEE1DBC9CEFD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_07B55947F1065E3FB7C4BEE1DBC9CEFD" xlink:to="lab_sigi_OnePointTwoNinePercentBorrowingFromFederalHomeLoanBankDueNovember152017Member_07B55947F1065E3FB7C4BEE1DBC9CEFD" xlink:type="arc" />
    <link:label id="lab_sigi_FivePointEightHundredSeventyFiveMember_190B6CB7C62D2E600FFA8D2D6D5F594F_verboseLabel_en-US" xlink:label="lab_sigi_FivePointEightHundredSeventyFiveMember_5F82B18FD99251498A6C71E1848488C7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Five Point Eight Hundred Seventy Five Percent Senior Notes Due 2043 [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FivePointEightHundredSeventyFiveMember" xlink:label="loc_sigi_FivePointEightHundredSeventyFiveMember_5F82B18FD99251498A6C71E1848488C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FivePointEightHundredSeventyFiveMember_5F82B18FD99251498A6C71E1848488C7" xlink:to="lab_sigi_FivePointEightHundredSeventyFiveMember_5F82B18FD99251498A6C71E1848488C7" xlink:type="arc" />
    <link:label id="lab_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_F64818EB7D557FE2703A8D2D6D5FBBD7_terseLabel_en-US" xlink:label="lab_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_E672BFD444CE51F597FA410FB3ACB36D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemption Of Seven Point Fifty Percent Junior Notes [Member]</link:label>
    <link:label id="lab_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_F64818EB7D557FE2703A8D2D6D5FBBD7_label_en-US" xlink:label="lab_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_E672BFD444CE51F597FA410FB3ACB36D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redemption Of Seven Point Fifty Percent Junior Notes [Member]</link:label>
    <link:label id="lab_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_F64818EB7D557FE2703A8D2D6D5FBBD7_documentation_en-US" xlink:label="lab_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_E672BFD444CE51F597FA410FB3ACB36D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the redemption of the 7.50% Junior Notes.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember" xlink:label="loc_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_E672BFD444CE51F597FA410FB3ACB36D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_E672BFD444CE51F597FA410FB3ACB36D" xlink:to="lab_sigi_RedemptionOfSevenPointFiftyPercentJuniorNotesMember_E672BFD444CE51F597FA410FB3ACB36D" xlink:type="arc" />
    <link:label id="lab_sigi_SixPointSeventyPercentSeniorNotesMember_25EDD270B63B6050C79B8D2D6D5F745D_verboseLabel_en-US" xlink:label="lab_sigi_SixPointSeventyPercentSeniorNotesMember_90972036B0765D21AF8EA56A0F71C372" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Six Point Seventy Percent Senior Notes due 2035 [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SixPointSeventyPercentSeniorNotesMember" xlink:label="loc_sigi_SixPointSeventyPercentSeniorNotesMember_90972036B0765D21AF8EA56A0F71C372" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SixPointSeventyPercentSeniorNotesMember_90972036B0765D21AF8EA56A0F71C372" xlink:to="lab_sigi_SixPointSeventyPercentSeniorNotesMember_90972036B0765D21AF8EA56A0F71C372" xlink:type="arc" />
    <link:label id="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_D2156B7BA4322F1F60CD8D2D6D5FC67E_verboseLabel_en-US" xlink:label="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_4E48DB43029D5948B5255F5BC7D79B2A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Seven Point Twenty Five Percent Senior Notes due 2034 [Member]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_SevenPointTwentyFivePercentSeniorNotesMember" xlink:label="loc_sigi_SevenPointTwentyFivePercentSeniorNotesMember_4E48DB43029D5948B5255F5BC7D79B2A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_SevenPointTwentyFivePercentSeniorNotesMember_4E48DB43029D5948B5255F5BC7D79B2A" xlink:to="lab_sigi_SevenPointTwentyFivePercentSeniorNotesMember_4E48DB43029D5948B5255F5BC7D79B2A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditMember_20938B9A4109F89B9BE28D2D6D5F7828_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_FEDA29F8EC3D5713B831CB4B326AA8A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit expires Dec.1, 2020 [Member]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditMember_20938B9A4109F89B9BE28D2D6D5F7828_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_FEDA29F8EC3D5713B831CB4B326AA8A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_FEDA29F8EC3D5713B831CB4B326AA8A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember_FEDA29F8EC3D5713B831CB4B326AA8A4" xlink:to="lab_us-gaap_LineOfCreditMember_FEDA29F8EC3D5713B831CB4B326AA8A4" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_356B97D9BBADD47FDE578D2D6D5FFBE4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_1A24FB2CAB4E5B72BA609C45FC46F170" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate principal amount of notes</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_356B97D9BBADD47FDE578D2D6D5FFBE4_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_1A24FB2CAB4E5B72BA609C45FC46F170" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_1A24FB2CAB4E5B72BA609C45FC46F170" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount_1A24FB2CAB4E5B72BA609C45FC46F170" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount_1A24FB2CAB4E5B72BA609C45FC46F170" xlink:type="arc" />
    <link:label id="lab_sigi_DebtInstrumentDiscount_3E916DA2045EE813EEE78D2D6D5FBFBA_terseLabel_en-US" xlink:label="lab_sigi_DebtInstrumentDiscount_55E034847C945442BBF7B6E316FB3498" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discount for notes issued</link:label>
    <link:label id="lab_sigi_DebtInstrumentDiscount_3E916DA2045EE813EEE78D2D6D5FBFBA_label_en-US" xlink:label="lab_sigi_DebtInstrumentDiscount_55E034847C945442BBF7B6E316FB3498" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument Discount</link:label>
    <link:label id="lab_sigi_DebtInstrumentDiscount_3E916DA2045EE813EEE78D2D6D5FBFBA_documentation_en-US" xlink:label="lab_sigi_DebtInstrumentDiscount_55E034847C945442BBF7B6E316FB3498" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of debt discount that was originally recognized at the issuance of the instrument.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_DebtInstrumentDiscount" xlink:label="loc_sigi_DebtInstrumentDiscount_55E034847C945442BBF7B6E316FB3498" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_DebtInstrumentDiscount_55E034847C945442BBF7B6E316FB3498" xlink:to="lab_sigi_DebtInstrumentDiscount_55E034847C945442BBF7B6E316FB3498" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_2FD60DDF4EA5C35FCBB68D2D6D5F69E3_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_8B56522553895645A9E366B345CF5598" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective yield</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_2FD60DDF4EA5C35FCBB68D2D6D5F69E3_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_8B56522553895645A9E366B345CF5598" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Effective Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_8B56522553895645A9E366B345CF5598" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_8B56522553895645A9E366B345CF5598" xlink:to="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_8B56522553895645A9E366B345CF5598" xlink:type="arc" />
    <link:label id="lab_sigi_BondProceeds_F6BF76E1F2C24B6C7AF18D2D6D5FD187_terseLabel_en-US" xlink:label="lab_sigi_BondProceeds_161DF4818C295FF2A85B55B5333FACF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bond proceeds to Insurance Subsidiaries as capital</link:label>
    <link:label id="lab_sigi_BondProceeds_F6BF76E1F2C24B6C7AF18D2D6D5FD187_label_en-US" xlink:label="lab_sigi_BondProceeds_161DF4818C295FF2A85B55B5333FACF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bond Proceeds</link:label>
    <link:label id="lab_sigi_BondProceeds_F6BF76E1F2C24B6C7AF18D2D6D5FD187_documentation_en-US" xlink:label="lab_sigi_BondProceeds_161DF4818C295FF2A85B55B5333FACF8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The cash inflow from the bond proceeds contributed to the Insurance Subsidiaries as capital.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_BondProceeds" xlink:label="loc_sigi_BondProceeds_161DF4818C295FF2A85B55B5333FACF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_BondProceeds_161DF4818C295FF2A85B55B5333FACF8" xlink:to="lab_sigi_BondProceeds_161DF4818C295FF2A85B55B5333FACF8" xlink:type="arc" />
    <link:label id="lab_sigi_PrincipalAccelerationAmountStateofDefault_CC94F18A63A7136EB1098D2D6D5FE123_terseLabel_en-US" xlink:label="lab_sigi_PrincipalAccelerationAmountStateofDefault_04709854291C5FCA9D8679463FAA72F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acceleration of principal</link:label>
    <link:label id="lab_sigi_PrincipalAccelerationAmountStateofDefault_CC94F18A63A7136EB1098D2D6D5FE123_label_en-US" xlink:label="lab_sigi_PrincipalAccelerationAmountStateofDefault_04709854291C5FCA9D8679463FAA72F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Principal Acceleration Amount StateOf Default</link:label>
    <link:label id="lab_sigi_PrincipalAccelerationAmountStateofDefault_CC94F18A63A7136EB1098D2D6D5FE123_documentation_en-US" xlink:label="lab_sigi_PrincipalAccelerationAmountStateofDefault_04709854291C5FCA9D8679463FAA72F5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the amount of concurrent debt outstanding which, if accelerated for any reason of default, causes an event of default on the referenced debt.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PrincipalAccelerationAmountStateofDefault" xlink:label="loc_sigi_PrincipalAccelerationAmountStateofDefault_04709854291C5FCA9D8679463FAA72F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PrincipalAccelerationAmountStateofDefault_04709854291C5FCA9D8679463FAA72F5" xlink:to="lab_sigi_PrincipalAccelerationAmountStateofDefault_04709854291C5FCA9D8679463FAA72F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_8A23D971CF299796DB178D2D6D5F1C7F_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_6697315B1570596A9BB0F596ADAE91A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net proceeds from the issuance</link:label>
    <link:label id="lab_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_8A23D971CF299796DB178D2D6D5F1C7F_label_en-US" xlink:label="lab_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_6697315B1570596A9BB0F596ADAE91A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Debt, Net of Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromDebtNetOfIssuanceCosts" xlink:label="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_6697315B1570596A9BB0F596ADAE91A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_6697315B1570596A9BB0F596ADAE91A7" xlink:to="lab_us-gaap_ProceedsFromDebtNetOfIssuanceCosts_6697315B1570596A9BB0F596ADAE91A7" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankStock_08009DCFC9D8C0EBBFA68D2D6D6F2850_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankStock_0DC5C7644B185D9086F84A009CAC1F75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate investment in FHLBI</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankStock_08009DCFC9D8C0EBBFA68D2D6D6F2850_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankStock_0DC5C7644B185D9086F84A009CAC1F75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankStock" xlink:label="loc_us-gaap_FederalHomeLoanBankStock_0DC5C7644B185D9086F84A009CAC1F75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankStock_0DC5C7644B185D9086F84A009CAC1F75" xlink:to="lab_us-gaap_FederalHomeLoanBankStock_0DC5C7644B185D9086F84A009CAC1F75" xlink:type="arc" />
    <link:label id="lab_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_E6A6A4DEFD4BB23EB8BB8D2D6D6F2305_terseLabel_en-US" xlink:label="lab_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_C2B08DEA79305615AE8B7113E9A83258" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowing threshold of FHLBI</link:label>
    <link:label id="lab_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_E6A6A4DEFD4BB23EB8BB8D2D6D6F2305_label_en-US" xlink:label="lab_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_C2B08DEA79305615AE8B7113E9A83258" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Advances General Debt Obligations Disclosures Multiple Amount</link:label>
    <link:label id="lab_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_E6A6A4DEFD4BB23EB8BB8D2D6D6F2305_documentation_en-US" xlink:label="lab_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_C2B08DEA79305615AE8B7113E9A83258" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This amount is a multiple of the Company's aggregate investment in the Federal Home Loan Bank representing the Company's ability to borrow from the Federal Home Loan Bank.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount" xlink:label="loc_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_C2B08DEA79305615AE8B7113E9A83258" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_C2B08DEA79305615AE8B7113E9A83258" xlink:to="lab_sigi_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMultipleAmount_C2B08DEA79305615AE8B7113E9A83258" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvances_C64316944D98DA6BCDA98D2D6D6FFC8C_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvances_4539C76E42F75D86A2B2D4178E25C3E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Advances</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvances_C64316944D98DA6BCDA98D2D6D6FFC8C_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvances_4539C76E42F75D86A2B2D4178E25C3E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Advances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvances" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvances_4539C76E42F75D86A2B2D4178E25C3E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvances_4539C76E42F75D86A2B2D4178E25C3E5" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvances_4539C76E42F75D86A2B2D4178E25C3E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesInterestRate_07CC9F06200DBAFF464A8D2D6D6F2FF4_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesInterestRate_45F07DDC6D695D6F896498A3BCE46A9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Interest Rate</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesInterestRate_07CC9F06200DBAFF464A8D2D6D6F2FF4_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesInterestRate_45F07DDC6D695D6F896498A3BCE46A9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Interest Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesInterestRate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesInterestRate_45F07DDC6D695D6F896498A3BCE46A9D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesInterestRate_45F07DDC6D695D6F896498A3BCE46A9D" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesInterestRate_45F07DDC6D695D6F896498A3BCE46A9D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_37B1801D50C8C32E26918D2D6D6F1C3B_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_ABEF93267754534FB2A4FBEF97405D2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of credit borrowing capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_37B1801D50C8C32E26918D2D6D6F1C3B_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_ABEF93267754534FB2A4FBEF97405D2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Current Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_ABEF93267754534FB2A4FBEF97405D2F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_ABEF93267754534FB2A4FBEF97405D2F" xlink:to="lab_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_ABEF93267754534FB2A4FBEF97405D2F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_137DBCF68234C75DCDB08D2D6D6FF1EE_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_4B822994B0B0526E8ACB8DE4845A0B73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of credit, maximum borrowing capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_137DBCF68234C75DCDB08D2D6D6FF1EE_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_4B822994B0B0526E8ACB8DE4845A0B73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_4B822994B0B0526E8ACB8DE4845A0B73" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_4B822994B0B0526E8ACB8DE4845A0B73" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_4B822994B0B0526E8ACB8DE4845A0B73" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLossCarryforwardsTable_0DD0172FAC7C26CA88F58C948D332ABC_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLossCarryforwardsTable_F3375A8A26AB59FCBC3CF20B62D42066" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Loss Carryforwards [Table]</link:label>
    <link:label id="lab_us-gaap_OperatingLossCarryforwardsTable_0DD0172FAC7C26CA88F58C948D332ABC_label_en-US" xlink:label="lab_us-gaap_OperatingLossCarryforwardsTable_F3375A8A26AB59FCBC3CF20B62D42066" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Loss Carryforwards [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_F3375A8A26AB59FCBC3CF20B62D42066" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_F3375A8A26AB59FCBC3CF20B62D42066" xlink:to="lab_us-gaap_OperatingLossCarryforwardsTable_F3375A8A26AB59FCBC3CF20B62D42066" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxAuthorityAxis_1C6F7C9145C592DA1CFF8C948D33B920_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityAxis_290E1DB838DE5F97B999B06C010E9BFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityAxis_1C6F7C9145C592DA1CFF8C948D33B920_label_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityAxis_290E1DB838DE5F97B999B06C010E9BFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_290E1DB838DE5F97B999B06C010E9BFC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_290E1DB838DE5F97B999B06C010E9BFC" xlink:to="lab_us-gaap_IncomeTaxAuthorityAxis_290E1DB838DE5F97B999B06C010E9BFC" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxAuthorityDomain_71D41956FB44681BAE5E8C948D34EF3A_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityDomain_4857ABB890325892873CD01BF7AC7BDF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Domain]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityDomain_71D41956FB44681BAE5E8C948D34EF3A_label_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityDomain_4857ABB890325892873CD01BF7AC7BDF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_4857ABB890325892873CD01BF7AC7BDF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_4857ABB890325892873CD01BF7AC7BDF" xlink:to="lab_us-gaap_IncomeTaxAuthorityDomain_4857ABB890325892873CD01BF7AC7BDF" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxAuthorityNameAxis_F577998898B81481D09C8C948D347750_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityNameAxis_BAE34949F83B5131A991033DF1B5307A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Authority, Name [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityNameAxis_F577998898B81481D09C8C948D347750_label_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityNameAxis_BAE34949F83B5131A991033DF1B5307A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Authority, Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_BAE34949F83B5131A991033DF1B5307A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_BAE34949F83B5131A991033DF1B5307A" xlink:to="lab_us-gaap_IncomeTaxAuthorityNameAxis_BAE34949F83B5131A991033DF1B5307A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxAuthorityNameDomain_43E2256188297C7578E38C948D345AB2_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityNameDomain_A6C3A3A25EBA5CADA3B1F3604F0213AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Authority, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityNameDomain_43E2256188297C7578E38C948D345AB2_label_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityNameDomain_A6C3A3A25EBA5CADA3B1F3604F0213AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Authority, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_A6C3A3A25EBA5CADA3B1F3604F0213AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameDomain_A6C3A3A25EBA5CADA3B1F3604F0213AF" xlink:to="lab_us-gaap_IncomeTaxAuthorityNameDomain_A6C3A3A25EBA5CADA3B1F3604F0213AF" xlink:type="arc" />
    <link:label id="lab_us-gaap_TaxPeriodAxis_AB935B036BD0854AD8F08C948D34E74D_terseLabel_en-US" xlink:label="lab_us-gaap_TaxPeriodAxis_5470358E92D85D49A98319C70C9831A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax Period [Axis]</link:label>
    <link:label id="lab_us-gaap_TaxPeriodAxis_AB935B036BD0854AD8F08C948D34E74D_label_en-US" xlink:label="lab_us-gaap_TaxPeriodAxis_5470358E92D85D49A98319C70C9831A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax Period [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxPeriodAxis" xlink:label="loc_us-gaap_TaxPeriodAxis_5470358E92D85D49A98319C70C9831A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxPeriodAxis_5470358E92D85D49A98319C70C9831A0" xlink:to="lab_us-gaap_TaxPeriodAxis_5470358E92D85D49A98319C70C9831A0" xlink:type="arc" />
    <link:label id="lab_us-gaap_TaxPeriodDomain_F02E6DA54D516F23BFF28C948D3507EA_terseLabel_en-US" xlink:label="lab_us-gaap_TaxPeriodDomain_DF9622068BDF55C8A4DA3596242D157D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax Period [Domain]</link:label>
    <link:label id="lab_us-gaap_TaxPeriodDomain_F02E6DA54D516F23BFF28C948D3507EA_label_en-US" xlink:label="lab_us-gaap_TaxPeriodDomain_DF9622068BDF55C8A4DA3596242D157D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax Period [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:label="loc_us-gaap_TaxPeriodDomain_DF9622068BDF55C8A4DA3596242D157D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TaxPeriodDomain_DF9622068BDF55C8A4DA3596242D157D" xlink:to="lab_us-gaap_TaxPeriodDomain_DF9622068BDF55C8A4DA3596242D157D" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLossCarryforwardsLineItems_3BB9FF6A9C9ABBFDD1F28C948D36A37F_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLossCarryforwardsLineItems_A5F97D37BB0950F0B97C3382B9F32ED2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Loss Carryforwards [Line Items]</link:label>
    <link:label id="lab_us-gaap_OperatingLossCarryforwardsLineItems_3BB9FF6A9C9ABBFDD1F28C948D36A37F_label_en-US" xlink:label="lab_us-gaap_OperatingLossCarryforwardsLineItems_A5F97D37BB0950F0B97C3382B9F32ED2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Loss Carryforwards [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_A5F97D37BB0950F0B97C3382B9F32ED2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_A5F97D37BB0950F0B97C3382B9F32ED2" xlink:to="lab_us-gaap_OperatingLossCarryforwardsLineItems_A5F97D37BB0950F0B97C3382B9F32ED2" xlink:type="arc" />
    <link:label id="lab_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_EF85DEFDABD152079D7A8C948D36D29F_terseLabel_en-US" xlink:label="lab_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_204764C8F03153A8BE4F9F7BAC4E0086" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Annual Limitation Of Net Operating Loss Carryforwards</link:label>
    <link:label id="lab_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_EF85DEFDABD152079D7A8C948D36D29F_label_en-US" xlink:label="lab_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_204764C8F03153A8BE4F9F7BAC4E0086" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Annual Limitation Of Net Operating Loss Carryforwards</link:label>
    <link:label id="lab_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_EF85DEFDABD152079D7A8C948D36D29F_documentation_en-US" xlink:label="lab_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_204764C8F03153A8BE4F9F7BAC4E0086" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of the annual limitation of operating loss carryforwards.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AnnualLimitationOfNetOperatingLossCarryforwards" xlink:label="loc_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_204764C8F03153A8BE4F9F7BAC4E0086" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_204764C8F03153A8BE4F9F7BAC4E0086" xlink:to="lab_sigi_AnnualLimitationOfNetOperatingLossCarryforwards_204764C8F03153A8BE4F9F7BAC4E0086" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLossCarryforwards_0E2E64710963CD6B55DB8C948D377AAE_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLossCarryforwards_5FCB39766BB858F78EAB3C71E5932122" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Loss Carryforwards</link:label>
    <link:label id="lab_us-gaap_OperatingLossCarryforwards_0E2E64710963CD6B55DB8C948D377AAE_label_en-US" xlink:label="lab_us-gaap_OperatingLossCarryforwards_5FCB39766BB858F78EAB3C71E5932122" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Loss Carryforwards</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="loc_us-gaap_OperatingLossCarryforwards_5FCB39766BB858F78EAB3C71E5932122" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLossCarryforwards_5FCB39766BB858F78EAB3C71E5932122" xlink:to="lab_us-gaap_OperatingLossCarryforwards_5FCB39766BB858F78EAB3C71E5932122" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6F644157C0BCC244F9CF816F5A29888C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7BA7A93651DC54DA80321AD0E4733E30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6F644157C0BCC244F9CF816F5A29888C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7BA7A93651DC54DA80321AD0E4733E30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7BA7A93651DC54DA80321AD0E4733E30" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7BA7A93651DC54DA80321AD0E4733E30" xlink:to="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7BA7A93651DC54DA80321AD0E4733E30" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3BDDE7D2566F516974C0816F5A29ECF8_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_44037EAD7EDE5A73987A3E1EBC911AF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transactions, by Related Party [Axis]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3BDDE7D2566F516974C0816F5A29ECF8_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_44037EAD7EDE5A73987A3E1EBC911AF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_44037EAD7EDE5A73987A3E1EBC911AF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_44037EAD7EDE5A73987A3E1EBC911AF8" xlink:to="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_44037EAD7EDE5A73987A3E1EBC911AF8" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyDomain_51D0A515A80D953A0994816F5A292719_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_4A9C10B686D35B9BBA4B5321D1CA283A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party [Domain]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyDomain_51D0A515A80D953A0994816F5A292719_label_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_4A9C10B686D35B9BBA4B5321D1CA283A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_4A9C10B686D35B9BBA4B5321D1CA283A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyDomain_4A9C10B686D35B9BBA4B5321D1CA283A" xlink:to="lab_us-gaap_RelatedPartyDomain_4A9C10B686D35B9BBA4B5321D1CA283A" xlink:type="arc" />
    <link:label id="lab_sigi_RelatedPartyInsuranceAgencyMember_2A2C3FFF0FAA0D7BD259816F5A29C564_terseLabel_en-US" xlink:label="lab_sigi_RelatedPartyInsuranceAgencyMember_C9C429C8ECC957A4A0D1B94EA279209D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Insurance Agency [Member]</link:label>
    <link:label id="lab_sigi_RelatedPartyInsuranceAgencyMember_2A2C3FFF0FAA0D7BD259816F5A29C564_label_en-US" xlink:label="lab_sigi_RelatedPartyInsuranceAgencyMember_C9C429C8ECC957A4A0D1B94EA279209D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Insurance Agency [Member]</link:label>
    <link:label id="lab_sigi_RelatedPartyInsuranceAgencyMember_2A2C3FFF0FAA0D7BD259816F5A29C564_documentation_en-US" xlink:label="lab_sigi_RelatedPartyInsuranceAgencyMember_C9C429C8ECC957A4A0D1B94EA279209D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents a related party transaction between an independent insurance agency and the Company.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RelatedPartyInsuranceAgencyMember" xlink:label="loc_sigi_RelatedPartyInsuranceAgencyMember_C9C429C8ECC957A4A0D1B94EA279209D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RelatedPartyInsuranceAgencyMember_C9C429C8ECC957A4A0D1B94EA279209D" xlink:to="lab_sigi_RelatedPartyInsuranceAgencyMember_C9C429C8ECC957A4A0D1B94EA279209D" xlink:type="arc" />
    <link:label id="lab_sigi_EquityOwnershipPercentageOfDirectorOfParent_B1746CA7BDFAB25B38BE816F5A2983C2_terseLabel_en-US" xlink:label="lab_sigi_EquityOwnershipPercentageOfDirectorOfParent_890A616A9BC655E491964EED0C1AC55B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity ownership percentage of director of parent of general independent retail insurance agency</link:label>
    <link:label id="lab_sigi_EquityOwnershipPercentageOfDirectorOfParent_B1746CA7BDFAB25B38BE816F5A2983C2_label_en-US" xlink:label="lab_sigi_EquityOwnershipPercentageOfDirectorOfParent_890A616A9BC655E491964EED0C1AC55B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Ownership Percentage Of Director Of Parent</link:label>
    <link:label id="lab_sigi_EquityOwnershipPercentageOfDirectorOfParent_B1746CA7BDFAB25B38BE816F5A2983C2_documentation_en-US" xlink:label="lab_sigi_EquityOwnershipPercentageOfDirectorOfParent_890A616A9BC655E491964EED0C1AC55B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum percentage of the equity of an independent insurance agency owned by a director of the Parent.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_EquityOwnershipPercentageOfDirectorOfParent" xlink:label="loc_sigi_EquityOwnershipPercentageOfDirectorOfParent_890A616A9BC655E491964EED0C1AC55B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_EquityOwnershipPercentageOfDirectorOfParent_890A616A9BC655E491964EED0C1AC55B" xlink:to="lab_sigi_EquityOwnershipPercentageOfDirectorOfParent_890A616A9BC655E491964EED0C1AC55B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DirectPremiumsWritten_8E7EECFA215AE558B77C816F5A297B8C_verboseLabel_en-US" xlink:label="lab_us-gaap_DirectPremiumsWritten_610032D283D35040999DB3419343CA92" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Direct premiums written</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DirectPremiumsWritten" xlink:label="loc_us-gaap_DirectPremiumsWritten_610032D283D35040999DB3419343CA92" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DirectPremiumsWritten_610032D283D35040999DB3419343CA92" xlink:to="lab_us-gaap_DirectPremiumsWritten_610032D283D35040999DB3419343CA92" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForCommissions_88A18E924283AAFE8039816F5A2951B5_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForCommissions_AA54D86A455153728D5336AC761CA009" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commissions paid to Rue Insurance</link:label>
    <link:label id="lab_us-gaap_PaymentsForCommissions_88A18E924283AAFE8039816F5A2951B5_label_en-US" xlink:label="lab_us-gaap_PaymentsForCommissions_AA54D86A455153728D5336AC761CA009" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Commissions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForCommissions" xlink:label="loc_us-gaap_PaymentsForCommissions_AA54D86A455153728D5336AC761CA009" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForCommissions_AA54D86A455153728D5336AC761CA009" xlink:to="lab_us-gaap_PaymentsForCommissions_AA54D86A455153728D5336AC761CA009" xlink:type="arc" />
    <link:label id="lab_us-gaap_DueToRelatedPartiesCurrent_FEC45EDD4C9417E41092816F5A29C083_terseLabel_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrent_8F5E76280E335CB692BA9D516E2CBA14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Due to Related Parties, Current</link:label>
    <link:label id="lab_us-gaap_DueToRelatedPartiesCurrent_FEC45EDD4C9417E41092816F5A29C083_label_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrent_8F5E76280E335CB692BA9D516E2CBA14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Due to Related Parties, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DueToRelatedPartiesCurrent" xlink:label="loc_us-gaap_DueToRelatedPartiesCurrent_8F5E76280E335CB692BA9D516E2CBA14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueToRelatedPartiesCurrent_8F5E76280E335CB692BA9D516E2CBA14" xlink:to="lab_us-gaap_DueToRelatedPartiesCurrent_8F5E76280E335CB692BA9D516E2CBA14" xlink:type="arc" />
    <link:label id="lab_sigi_RelatedPartyTransactionsContributionsToFoundation_528BF0E48F5EFE7F265F816F5A297623_terseLabel_en-US" xlink:label="lab_sigi_RelatedPartyTransactionsContributionsToFoundation_5B4044436EF8509A86A9FD0D9545563B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contributions to the Selective Insurance Group Foundation</link:label>
    <link:label id="lab_sigi_RelatedPartyTransactionsContributionsToFoundation_528BF0E48F5EFE7F265F816F5A297623_label_en-US" xlink:label="lab_sigi_RelatedPartyTransactionsContributionsToFoundation_5B4044436EF8509A86A9FD0D9545563B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions Contributions To Foundation</link:label>
    <link:label id="lab_sigi_RelatedPartyTransactionsContributionsToFoundation_528BF0E48F5EFE7F265F816F5A297623_documentation_en-US" xlink:label="lab_sigi_RelatedPartyTransactionsContributionsToFoundation_5B4044436EF8509A86A9FD0D9545563B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of contributions made to a related party private foundation.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RelatedPartyTransactionsContributionsToFoundation" xlink:label="loc_sigi_RelatedPartyTransactionsContributionsToFoundation_5B4044436EF8509A86A9FD0D9545563B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RelatedPartyTransactionsContributionsToFoundation_5B4044436EF8509A86A9FD0D9545563B" xlink:to="lab_sigi_RelatedPartyTransactionsContributionsToFoundation_5B4044436EF8509A86A9FD0D9545563B" xlink:type="arc" />
    <link:label id="lab_sigi_PercentageCommonStockOwnedbyRelatedParty_DE59BB1B254B16453EE2816F5A291C04_terseLabel_en-US" xlink:label="lab_sigi_PercentageCommonStockOwnedbyRelatedParty_DC700FF89328513EA6E9E56F41095C9F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage Common Stock Owned by Related Party</link:label>
    <link:label id="lab_sigi_PercentageCommonStockOwnedbyRelatedParty_DE59BB1B254B16453EE2816F5A291C04_label_en-US" xlink:label="lab_sigi_PercentageCommonStockOwnedbyRelatedParty_DC700FF89328513EA6E9E56F41095C9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Common Stock Owned by Related Party</link:label>
    <link:label id="lab_sigi_PercentageCommonStockOwnedbyRelatedParty_DE59BB1B254B16453EE2816F5A291C04_documentation_en-US" xlink:label="lab_sigi_PercentageCommonStockOwnedbyRelatedParty_DC700FF89328513EA6E9E56F41095C9F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of common stock owned by a related party</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PercentageCommonStockOwnedbyRelatedParty" xlink:label="loc_sigi_PercentageCommonStockOwnedbyRelatedParty_DC700FF89328513EA6E9E56F41095C9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PercentageCommonStockOwnedbyRelatedParty_DC700FF89328513EA6E9E56F41095C9F" xlink:to="lab_sigi_PercentageCommonStockOwnedbyRelatedParty_DC700FF89328513EA6E9E56F41095C9F" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostsAndExpensesRelatedParty_ACB16B650A63F6E5C699816F5A292CC9_terseLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpensesRelatedParty_684523FE5A52521E8FB8883CCC0FFEFD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Costs and Expenses, Related Party</link:label>
    <link:label id="lab_us-gaap_CostsAndExpensesRelatedParty_ACB16B650A63F6E5C699816F5A292CC9_label_en-US" xlink:label="lab_us-gaap_CostsAndExpensesRelatedParty_684523FE5A52521E8FB8883CCC0FFEFD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses, Related Party</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsAndExpensesRelatedParty" xlink:label="loc_us-gaap_CostsAndExpensesRelatedParty_684523FE5A52521E8FB8883CCC0FFEFD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpensesRelatedParty_684523FE5A52521E8FB8883CCC0FFEFD" xlink:to="lab_us-gaap_CostsAndExpensesRelatedParty_684523FE5A52521E8FB8883CCC0FFEFD" xlink:type="arc" />
    <link:label id="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_6F83C54C8B4ACD9A4A06816F5A293977_terseLabel_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_25C74B1097F95AFDAC395F30936EAD41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Due to Related Parties</link:label>
    <link:label id="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_6F83C54C8B4ACD9A4A06816F5A293977_label_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_25C74B1097F95AFDAC395F30936EAD41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Due to Related Parties</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_25C74B1097F95AFDAC395F30936EAD41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_25C74B1097F95AFDAC395F30936EAD41" xlink:to="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_25C74B1097F95AFDAC395F30936EAD41" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashFlowSupplementalDisclosuresTextBlock_DBA9C0D60D17B4019570101EE439B085_terseLabel_en-US" xlink:label="lab_us-gaap_CashFlowSupplementalDisclosuresTextBlock_B7CC74678A0054B897CD002CB44B1B90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statements of Cash Flow</link:label>
    <link:label id="lab_us-gaap_CashFlowSupplementalDisclosuresTextBlock_DBA9C0D60D17B4019570101EE439B085_label_en-US" xlink:label="lab_us-gaap_CashFlowSupplementalDisclosuresTextBlock_B7CC74678A0054B897CD002CB44B1B90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Flow, Supplemental Disclosures [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashFlowSupplementalDisclosuresTextBlock" xlink:label="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_B7CC74678A0054B897CD002CB44B1B90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_B7CC74678A0054B897CD002CB44B1B90" xlink:to="lab_us-gaap_CashFlowSupplementalDisclosuresTextBlock_B7CC74678A0054B897CD002CB44B1B90" xlink:type="arc" />
    <link:label id="lab_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_9D4BFBB7427FA772B944101EE3E2DD7D_terseLabel_en-US" xlink:label="lab_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_336AA4B021C65D869A10296C272E9088" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contractual Obligation Additional Investment in Alternative or Other Investments</link:label>
    <link:label id="lab_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_9D4BFBB7427FA772B944101EE3E2DD7D_label_en-US" xlink:label="lab_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_336AA4B021C65D869A10296C272E9088" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation Additional Investment in Alternative or Other Investments</link:label>
    <link:label id="lab_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_9D4BFBB7427FA772B944101EE3E2DD7D_documentation_en-US" xlink:label="lab_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_336AA4B021C65D869A10296C272E9088" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contractual obligation to invest additional amounts in alternative and other investments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments" xlink:label="loc_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_336AA4B021C65D869A10296C272E9088" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_336AA4B021C65D869A10296C272E9088" xlink:to="lab_sigi_ContractualObligationAdditionalInvestmentinAlternativeorOtherInvestments_336AA4B021C65D869A10296C272E9088" xlink:type="arc" />
    <link:label id="lab_sigi_PurchaseAmountOfAnnuities_C38EC25160240DF0DFE2101EE3E2E1FE_terseLabel_en-US" xlink:label="lab_sigi_PurchaseAmountOfAnnuities_E5818D97F0D552C38C3E7E2DB787CEF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchase amount of annuities</link:label>
    <link:label id="lab_sigi_PurchaseAmountOfAnnuities_C38EC25160240DF0DFE2101EE3E2E1FE_label_en-US" xlink:label="lab_sigi_PurchaseAmountOfAnnuities_E5818D97F0D552C38C3E7E2DB787CEF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Purchase Amount Of Annuities</link:label>
    <link:label id="lab_sigi_PurchaseAmountOfAnnuities_C38EC25160240DF0DFE2101EE3E2E1FE_documentation_en-US" xlink:label="lab_sigi_PurchaseAmountOfAnnuities_E5818D97F0D552C38C3E7E2DB787CEF7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of annuities purchased from life insurance companies to fulfill obligations under claim settlements that provide for periodic future payments to claimants.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_PurchaseAmountOfAnnuities" xlink:label="loc_sigi_PurchaseAmountOfAnnuities_E5818D97F0D552C38C3E7E2DB787CEF7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_PurchaseAmountOfAnnuities_E5818D97F0D552C38C3E7E2DB787CEF7" xlink:to="lab_sigi_PurchaseAmountOfAnnuities_E5818D97F0D552C38C3E7E2DB787CEF7" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeaseAndRentalExpense_9DD39EE980D1538BB4B9101EE3E20AD0_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_B7A9CDCADE8658078A7E51F8A92C513D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rental expense for operating leases for office space, equipment, and vehicles</link:label>
    <link:label id="lab_us-gaap_LeaseAndRentalExpense_9DD39EE980D1538BB4B9101EE3E20AD0_label_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_B7A9CDCADE8658078A7E51F8A92C513D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Rent Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_B7A9CDCADE8658078A7E51F8A92C513D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseAndRentalExpense_B7A9CDCADE8658078A7E51F8A92C513D" xlink:to="lab_us-gaap_LeaseAndRentalExpense_B7A9CDCADE8658078A7E51F8A92C513D" xlink:type="arc" />
    <link:label id="lab_sigi_CapitalLeaseAgreementsExpirationPeriod_63C5A4EE59494514A4F8101EE3E2E985_terseLabel_en-US" xlink:label="lab_sigi_CapitalLeaseAgreementsExpirationPeriod_DDAFB1D6ACF5501DA00850E2EF6A4265" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Lease Agreements Expiration Period</link:label>
    <link:label id="lab_sigi_CapitalLeaseAgreementsExpirationPeriod_63C5A4EE59494514A4F8101EE3E2E985_label_en-US" xlink:label="lab_sigi_CapitalLeaseAgreementsExpirationPeriod_DDAFB1D6ACF5501DA00850E2EF6A4265" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Lease Agreements Expiration Period</link:label>
    <link:label id="lab_sigi_CapitalLeaseAgreementsExpirationPeriod_63C5A4EE59494514A4F8101EE3E2E985_documentation_en-US" xlink:label="lab_sigi_CapitalLeaseAgreementsExpirationPeriod_DDAFB1D6ACF5501DA00850E2EF6A4265" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item presents capital lease agreements expiring date.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_CapitalLeaseAgreementsExpirationPeriod" xlink:label="loc_sigi_CapitalLeaseAgreementsExpirationPeriod_DDAFB1D6ACF5501DA00850E2EF6A4265" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_CapitalLeaseAgreementsExpirationPeriod_DDAFB1D6ACF5501DA00850E2EF6A4265" xlink:to="lab_sigi_CapitalLeaseAgreementsExpirationPeriod_DDAFB1D6ACF5501DA00850E2EF6A4265" xlink:type="arc" />
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsAxis_96E436183E8876D911CD90CCBCD7BC3E_terseLabel_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsAxis_BFFB24F8B3845787B4D894FA0BE6FE4F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investments [Axis]</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsAxis_96E436183E8876D911CD90CCBCD7BC3E_label_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsAxis_BFFB24F8B3845787B4D894FA0BE6FE4F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investments [Axis]</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsAxis_96E436183E8876D911CD90CCBCD7BC3E_documentation_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsAxis_BFFB24F8B3845787B4D894FA0BE6FE4F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The disclosure of unrealized gains and losses on investments.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnrealizedGainLossOnInvestmentsAxis" xlink:label="loc_sigi_UnrealizedGainLossOnInvestmentsAxis_BFFB24F8B3845787B4D894FA0BE6FE4F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnrealizedGainLossOnInvestmentsAxis_BFFB24F8B3845787B4D894FA0BE6FE4F" xlink:to="lab_sigi_UnrealizedGainLossOnInvestmentsAxis_BFFB24F8B3845787B4D894FA0BE6FE4F" xlink:type="arc" />
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsDomain_F289936C73B9AC2C0DB390CCBCD7CF0D_terseLabel_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsDomain_0AFE7BAF4A7251B0850F17C219407213" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investments [Domain]</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsDomain_F289936C73B9AC2C0DB390CCBCD7CF0D_label_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsDomain_0AFE7BAF4A7251B0850F17C219407213" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investments [Domain]</link:label>
    <link:label id="lab_sigi_UnrealizedGainLossOnInvestmentsDomain_F289936C73B9AC2C0DB390CCBCD7CF0D_documentation_en-US" xlink:label="lab_sigi_UnrealizedGainLossOnInvestmentsDomain_0AFE7BAF4A7251B0850F17C219407213" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unrealized Gain Loss On Investments [Domain]</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_UnrealizedGainLossOnInvestmentsDomain" xlink:label="loc_sigi_UnrealizedGainLossOnInvestmentsDomain_0AFE7BAF4A7251B0850F17C219407213" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_UnrealizedGainLossOnInvestmentsDomain_0AFE7BAF4A7251B0850F17C219407213" xlink:to="lab_sigi_UnrealizedGainLossOnInvestmentsDomain_0AFE7BAF4A7251B0850F17C219407213" xlink:type="arc" />
    <link:label id="lab_sigi_ProvisionalIncreasetoDeferredTaxAsset_DC504257C9A5A7B6249090CCBCD8BAFB_terseLabel_en-US" xlink:label="lab_sigi_ProvisionalIncreasetoDeferredTaxAsset_014EAA611EA15733A0074E793FDAB4C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provisional Increase to Deferred Tax Asset</link:label>
    <link:label id="lab_sigi_ProvisionalIncreasetoDeferredTaxAsset_DC504257C9A5A7B6249090CCBCD8BAFB_label_en-US" xlink:label="lab_sigi_ProvisionalIncreasetoDeferredTaxAsset_014EAA611EA15733A0074E793FDAB4C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Provisional Increase to Deferred Tax Asset</link:label>
    <link:label id="lab_sigi_ProvisionalIncreasetoDeferredTaxAsset_DC504257C9A5A7B6249090CCBCD8BAFB_documentation_en-US" xlink:label="lab_sigi_ProvisionalIncreasetoDeferredTaxAsset_014EAA611EA15733A0074E793FDAB4C1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Provisional Increase to Deferred Tax Asset due to the change in approach from the Tax Cuts and Jobs Act.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_ProvisionalIncreasetoDeferredTaxAsset" xlink:label="loc_sigi_ProvisionalIncreasetoDeferredTaxAsset_014EAA611EA15733A0074E793FDAB4C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_ProvisionalIncreasetoDeferredTaxAsset_014EAA611EA15733A0074E793FDAB4C1" xlink:to="lab_sigi_ProvisionalIncreasetoDeferredTaxAsset_014EAA611EA15733A0074E793FDAB4C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_81798F5821E2C51B003290CCBCD931D8_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_AC811DC0DC4D5E2E95AF44E92257A162" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax at statutory rate of 35%</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_81798F5821E2C51B003290CCBCD931D8_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_AC811DC0DC4D5E2E95AF44E92257A162" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_AC811DC0DC4D5E2E95AF44E92257A162" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_AC811DC0DC4D5E2E95AF44E92257A162" xlink:to="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_AC811DC0DC4D5E2E95AF44E92257A162" xlink:type="arc" />
    <link:label id="lab_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_2FBC0E6A6270A416498490CCBCD912A0_negatedLabel_en-US" xlink:label="lab_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_4E441C80FD475BDBA585E7AB70C1BA97" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Tax-advantaged interest</link:label>
    <link:label id="lab_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_2FBC0E6A6270A416498490CCBCD912A0_label_en-US" xlink:label="lab_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_4E441C80FD475BDBA585E7AB70C1BA97" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Reconciliation Tax Advantaged Interest Income</link:label>
    <link:label id="lab_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_2FBC0E6A6270A416498490CCBCD912A0_documentation_en-US" xlink:label="lab_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_4E441C80FD475BDBA585E7AB70C1BA97" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to investment income that is tax advantaged. Tax advantaged investment securities generally are, by statute, tax-reduced, tax-deferred, or tax-free.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome" xlink:label="loc_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_4E441C80FD475BDBA585E7AB70C1BA97" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_4E441C80FD475BDBA585E7AB70C1BA97" xlink:to="lab_sigi_IncomeTaxReconciliationTaxAdvantagedInterestIncome_4E441C80FD475BDBA585E7AB70C1BA97" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationDeductionsDividends_AF1264AB7F3310AF274690CCBCD966D0_negatedLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationDeductionsDividends_BC62F943BA8B5AC79ED570E02A2DB4AB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Dividends received deduction</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationDeductionsDividends_AF1264AB7F3310AF274690CCBCD966D0_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationDeductionsDividends_BC62F943BA8B5AC79ED570E02A2DB4AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductionsDividends" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductionsDividends_BC62F943BA8B5AC79ED570E02A2DB4AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationDeductionsDividends_BC62F943BA8B5AC79ED570E02A2DB4AB" xlink:to="lab_us-gaap_IncomeTaxReconciliationDeductionsDividends_BC62F943BA8B5AC79ED570E02A2DB4AB" xlink:type="arc" />
    <link:label id="lab_sigi_TaxReformDeferredTaxAssetImpact_E579BCB4431320FBE9C390CCBCDA1FDE_terseLabel_en-US" xlink:label="lab_sigi_TaxReformDeferredTaxAssetImpact_D3EF73E9D83F554696477814050D993B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax Reform Deferred Tax Asset Impact</link:label>
    <link:label id="lab_sigi_TaxReformDeferredTaxAssetImpact_E579BCB4431320FBE9C390CCBCDA1FDE_label_en-US" xlink:label="lab_sigi_TaxReformDeferredTaxAssetImpact_D3EF73E9D83F554696477814050D993B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax Reform Deferred Tax Asset Impact</link:label>
    <link:label id="lab_sigi_TaxReformDeferredTaxAssetImpact_E579BCB4431320FBE9C390CCBCDA1FDE_documentation_en-US" xlink:label="lab_sigi_TaxReformDeferredTaxAssetImpact_D3EF73E9D83F554696477814050D993B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impact of the 2017 Tax Cuts and Jobs Act on the deferred tax asset.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TaxReformDeferredTaxAssetImpact" xlink:label="loc_sigi_TaxReformDeferredTaxAssetImpact_D3EF73E9D83F554696477814050D993B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TaxReformDeferredTaxAssetImpact_D3EF73E9D83F554696477814050D993B" xlink:to="lab_sigi_TaxReformDeferredTaxAssetImpact_D3EF73E9D83F554696477814050D993B" xlink:type="arc" />
    <link:label id="lab_sigi_TaxBenefitonUnrealizedGains_4F6A05728A0B6942500F90CCBCDA8422_terseLabel_en-US" xlink:label="lab_sigi_TaxBenefitonUnrealizedGains_AF35C2F2BECF573D9723CBEBCD060105" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax Benefit on Unrealized Gains</link:label>
    <link:label id="lab_sigi_TaxBenefitonUnrealizedGains_4F6A05728A0B6942500F90CCBCDA8422_label_en-US" xlink:label="lab_sigi_TaxBenefitonUnrealizedGains_AF35C2F2BECF573D9723CBEBCD060105" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax Benefit on Unrealized Gains</link:label>
    <link:label id="lab_sigi_TaxBenefitonUnrealizedGains_4F6A05728A0B6942500F90CCBCDA8422_documentation_en-US" xlink:label="lab_sigi_TaxBenefitonUnrealizedGains_AF35C2F2BECF573D9723CBEBCD060105" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax Benefit on Unrealized Gains</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_TaxBenefitonUnrealizedGains" xlink:label="loc_sigi_TaxBenefitonUnrealizedGains_AF35C2F2BECF573D9723CBEBCD060105" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_TaxBenefitonUnrealizedGains_AF35C2F2BECF573D9723CBEBCD060105" xlink:to="lab_sigi_TaxBenefitonUnrealizedGains_AF35C2F2BECF573D9723CBEBCD060105" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_1279666D919412CBC7DD90CCBCDADAF1_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_BAEFCD05EE9C5F51A3F814E6695FBA11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_1279666D919412CBC7DD90CCBCDADAF1_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_BAEFCD05EE9C5F51A3F814E6695FBA11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Other Adjustments, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_BAEFCD05EE9C5F51A3F814E6695FBA11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_BAEFCD05EE9C5F51A3F814E6695FBA11" xlink:to="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_BAEFCD05EE9C5F51A3F814E6695FBA11" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_88F702883C242AB8C5C0101EE3DAFF22_label_en-US" xlink:label="lab_us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_68F8C9468E7C59B08AB363D7189ED14B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency, Information about Litigation Matters [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyInformationAboutLitigationMattersAbstract" xlink:label="loc_us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_68F8C9468E7C59B08AB363D7189ED14B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_68F8C9468E7C59B08AB363D7189ED14B" xlink:to="lab_us-gaap_LossContingencyInformationAboutLitigationMattersAbstract_68F8C9468E7C59B08AB363D7189ED14B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LegalMattersAndContingenciesTextBlock_3DAB190E3B6998F0E206101EE3DA8368_terseLabel_en-US" xlink:label="lab_us-gaap_LegalMattersAndContingenciesTextBlock_C8EE55E32026531A94692FEB5B705583" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Litigation</link:label>
    <link:label id="lab_us-gaap_LegalMattersAndContingenciesTextBlock_3DAB190E3B6998F0E206101EE3DA8368_label_en-US" xlink:label="lab_us-gaap_LegalMattersAndContingenciesTextBlock_C8EE55E32026531A94692FEB5B705583" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Matters and Contingencies [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LegalMattersAndContingenciesTextBlock" xlink:label="loc_us-gaap_LegalMattersAndContingenciesTextBlock_C8EE55E32026531A94692FEB5B705583" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LegalMattersAndContingenciesTextBlock_C8EE55E32026531A94692FEB5B705583" xlink:to="lab_us-gaap_LegalMattersAndContingenciesTextBlock_C8EE55E32026531A94692FEB5B705583" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_9CF63D0B2FA9C9224323101EE36CF19F_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_7BBCD6FE56A35F94B981CDF25C44A65F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_9CF63D0B2FA9C9224323101EE36CF19F_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_7BBCD6FE56A35F94B981CDF25C44A65F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTextBlock_7BBCD6FE56A35F94B981CDF25C44A65F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTextBlock_7BBCD6FE56A35F94B981CDF25C44A65F" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_7BBCD6FE56A35F94B981CDF25C44A65F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_34B07D89D9CEC4E5637C101EE36DC171_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FD3738CA7E2E5A1987B6BF36007CB66A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Summary of the Changes in Fair Value of Securities Using Level 3 Inputs</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_34B07D89D9CEC4E5637C101EE36DC171_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FD3738CA7E2E5A1987B6BF36007CB66A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FD3738CA7E2E5A1987B6BF36007CB66A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FD3738CA7E2E5A1987B6BF36007CB66A" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FD3738CA7E2E5A1987B6BF36007CB66A" xlink:type="arc" />
    <link:label id="lab_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_561BE2EDA7809CD479E8101EE36DDD67_terseLabel_en-US" xlink:label="lab_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_9F7AC9797DE853AC9B34EE0FB59340D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Quantitative Information of our Financial Assets and Liabilities that were Disclosed at Fair Value</link:label>
    <link:label id="lab_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_561BE2EDA7809CD479E8101EE36DDD67_label_en-US" xlink:label="lab_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_9F7AC9797DE853AC9B34EE0FB59340D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Assets Liabilities Disclosed [Table Text Block]</link:label>
    <link:label id="lab_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_561BE2EDA7809CD479E8101EE36DDD67_documentation_en-US" xlink:label="lab_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_9F7AC9797DE853AC9B34EE0FB59340D2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of assets and liabilities that are disclosed at fair value. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock" xlink:label="loc_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_9F7AC9797DE853AC9B34EE0FB59340D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_9F7AC9797DE853AC9B34EE0FB59340D2" xlink:to="lab_sigi_FairValueAssetsLiabilitiesDisclosedTableTextBlock_9F7AC9797DE853AC9B34EE0FB59340D2" xlink:type="arc" />
    <link:label id="lab_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_9AF9DBB3E5CFE390485B917FB383B3BF_terseLabel_en-US" xlink:label="lab_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_C6F382ACAEA5585085579B438B911310" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregated Summarized Financial Information For Partnerships In Our Alternative Investment Portfolio [Table]</link:label>
    <link:label id="lab_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_9AF9DBB3E5CFE390485B917FB383B3BF_label_en-US" xlink:label="lab_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_C6F382ACAEA5585085579B438B911310" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aggregated Summarized Financial Information For Partnerships In Our Alternative Investment Portfolio [Table]</link:label>
    <link:label id="lab_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_9AF9DBB3E5CFE390485B917FB383B3BF_documentation_en-US" xlink:label="lab_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_C6F382ACAEA5585085579B438B911310" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of aggregate summarized income statement information for alternative investments accounted for by the equity method.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable" xlink:label="loc_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_C6F382ACAEA5585085579B438B911310" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_C6F382ACAEA5585085579B438B911310" xlink:to="lab_sigi_AggregatedSummarizedFinancialInformationForPartnershipsInOurAlternativeInvestmentPortfolioTable_C6F382ACAEA5585085579B438B911310" xlink:type="arc" />
    <link:label id="lab_us-gaap_PartnershipInterestMember_BDB3CE586A8CA51F9CF3917FB384B475_verboseLabel_en-US" xlink:label="lab_us-gaap_PartnershipInterestMember_8D0BF5193DB25FB8BC3B2DF4254091F6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Alternative Investments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PartnershipInterestMember" xlink:label="loc_us-gaap_PartnershipInterestMember_8D0BF5193DB25FB8BC3B2DF4254091F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnershipInterestMember_8D0BF5193DB25FB8BC3B2DF4254091F6" xlink:to="lab_us-gaap_PartnershipInterestMember_8D0BF5193DB25FB8BC3B2DF4254091F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_A824854CF4DA761010A1917FB3842C2D_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_859E610AA3E9593CB21BD9F75376C7E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Equity Method Investments [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_A824854CF4DA761010A1917FB3842C2D_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_859E610AA3E9593CB21BD9F75376C7E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Equity Method Investments [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_859E610AA3E9593CB21BD9F75376C7E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_859E610AA3E9593CB21BD9F75376C7E7" xlink:to="lab_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_859E610AA3E9593CB21BD9F75376C7E7" xlink:type="arc" />
    <link:label id="lab_sigi_NetInvestmentIncomeOfEquityMethodInvestees_5C72640297DEAD6E3280917FB3842AAA_terseLabel_en-US" xlink:label="lab_sigi_NetInvestmentIncomeOfEquityMethodInvestees_B083C502BF86561A871EB375A4D24B9A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net investment (loss) income</link:label>
    <link:label id="lab_sigi_NetInvestmentIncomeOfEquityMethodInvestees_5C72640297DEAD6E3280917FB3842AAA_label_en-US" xlink:label="lab_sigi_NetInvestmentIncomeOfEquityMethodInvestees_B083C502BF86561A871EB375A4D24B9A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Investment Income Of Equity Method Investees</link:label>
    <link:label id="lab_sigi_NetInvestmentIncomeOfEquityMethodInvestees_5C72640297DEAD6E3280917FB3842AAA_documentation_en-US" xlink:label="lab_sigi_NetInvestmentIncomeOfEquityMethodInvestees_B083C502BF86561A871EB375A4D24B9A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the disclosure of summarized financial information, specifically aggregate net investment income, for unconsolidated subsidiaries and 50 percent-or-less owned entities accounted for under the equity method accounting.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NetInvestmentIncomeOfEquityMethodInvestees" xlink:label="loc_sigi_NetInvestmentIncomeOfEquityMethodInvestees_B083C502BF86561A871EB375A4D24B9A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NetInvestmentIncomeOfEquityMethodInvestees_B083C502BF86561A871EB375A4D24B9A" xlink:to="lab_sigi_NetInvestmentIncomeOfEquityMethodInvestees_B083C502BF86561A871EB375A4D24B9A" xlink:type="arc" />
    <link:label id="lab_sigi_RealizedGainsLossesOfEquityMethodInvestees_21FC828398F8E83831C1917FB384170A_terseLabel_en-US" xlink:label="lab_sigi_RealizedGainsLossesOfEquityMethodInvestees_8DC0F9C6ED3054968C381F430855216C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Realized gains</link:label>
    <link:label id="lab_sigi_RealizedGainsLossesOfEquityMethodInvestees_21FC828398F8E83831C1917FB384170A_label_en-US" xlink:label="lab_sigi_RealizedGainsLossesOfEquityMethodInvestees_8DC0F9C6ED3054968C381F430855216C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Gains Losses Of Equity Method Investees</link:label>
    <link:label id="lab_sigi_RealizedGainsLossesOfEquityMethodInvestees_21FC828398F8E83831C1917FB384170A_documentation_en-US" xlink:label="lab_sigi_RealizedGainsLossesOfEquityMethodInvestees_8DC0F9C6ED3054968C381F430855216C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the disclosure of summarized financial information, specifically aggregate realized gains (losses), for unconsolidated subsidiaries and 50 percent-or-less owned entities accounted for under the equity method of accounting.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_RealizedGainsLossesOfEquityMethodInvestees" xlink:label="loc_sigi_RealizedGainsLossesOfEquityMethodInvestees_8DC0F9C6ED3054968C381F430855216C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_RealizedGainsLossesOfEquityMethodInvestees_8DC0F9C6ED3054968C381F430855216C" xlink:to="lab_sigi_RealizedGainsLossesOfEquityMethodInvestees_8DC0F9C6ED3054968C381F430855216C" xlink:type="arc" />
    <link:label id="lab_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_E09D92DBF52629E8B9CC917FB384F4FA_terseLabel_en-US" xlink:label="lab_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_DEC425AB3542576286FFACE5B8BA6268" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in unrealized appreciation (depreciation)</link:label>
    <link:label id="lab_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_E09D92DBF52629E8B9CC917FB384F4FA_label_en-US" xlink:label="lab_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_DEC425AB3542576286FFACE5B8BA6268" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Change In Unrealized Appreciation Depreciation Of Equity Method Investees</link:label>
    <link:label id="lab_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_E09D92DBF52629E8B9CC917FB384F4FA_documentation_en-US" xlink:label="lab_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_DEC425AB3542576286FFACE5B8BA6268" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This item represents the disclosure of summarized financial information, specifically the aggregate change in unrealized appreciation (depreciation), for unconsolidated subsidiaries and 50 percent-or-less owned entities accounted for under the equity method of accounting.</link:label>
    <link:loc xlink:href="sigi-20171231.xsd#sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees" xlink:label="loc_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_DEC425AB3542576286FFACE5B8BA6268" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_DEC425AB3542576286FFACE5B8BA6268" xlink:to="lab_sigi_NetChangeInUnrealizedAppreciationDepreciationOfEquityMethodInvestees_DEC425AB3542576286FFACE5B8BA6268" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_58A67E9E4F9A581E8533917FB3843430_totalLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_3D22CAC11F63507C940883511AE1AFB4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net Income</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_58A67E9E4F9A581E8533917FB3843430_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_3D22CAC11F63507C940883511AE1AFB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Net Income (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_3D22CAC11F63507C940883511AE1AFB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_3D22CAC11F63507C940883511AE1AFB4" xlink:to="lab_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_3D22CAC11F63507C940883511AE1AFB4" xlink:type="arc" />
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_61A05B3084A0CC41493A101EE25B0196_terseLabel_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock_F0DD7B877BD65753B4B2A58E40149C05" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Signifcant Accounting Policies</link:label>
    <link:label id="lab_us-gaap_SignificantAccountingPoliciesTextBlock_61A05B3084A0CC41493A101EE25B0196_label_en-US" xlink:label="lab_us-gaap_SignificantAccountingPoliciesTextBlock_F0DD7B877BD65753B4B2A58E40149C05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Significant Accounting Policies [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_F0DD7B877BD65753B4B2A58E40149C05" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SignificantAccountingPoliciesTextBlock_F0DD7B877BD65753B4B2A58E40149C05" xlink:to="lab_us-gaap_SignificantAccountingPoliciesTextBlock_F0DD7B877BD65753B4B2A58E40149C05" xlink:type="arc" />
  </link:labelLink>
</link:linkbase>
