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<!-- RRD ActiveDisclosure(SM) XBRL Linkbase Document - http://www.financial.rrd.com/ -->
<!-- Creation Date      : 2016-10-28T14:01:24.6245258+00:00 -->
<!-- Version            : 2.3.7.21 -->
<!-- Package ID         : 695C29515A1BDD457984C103703012B8-0001018979-001608 -->
<!-- Copyright (c) 2016 R. R. Donnelley &amp; Sons Company. All Rights Reserved. -->
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    <loc xlink:href="amsf-20160930.xsd#amsf_ContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses" xlink:type="locator" xlink:label="amsf_ContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses" />
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    <loc xlink:href="amsf-20160930.xsd#amsf_ContinuousUnrealizedLossPositionGreaterThanTwelveMonthsAggregateLosses" xlink:type="locator" xlink:label="amsf_ContinuousUnrealizedLossPositionGreaterThanTwelveMonthsAggregateLosses" />
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    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:type="locator" xlink:label="dei_DocumentType" />
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    <label xml:lang="en-US" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</label>
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    <label xml:lang="en-US" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</label>
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    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:type="locator" xlink:label="dei_TradingSymbol" />
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    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:type="locator" xlink:label="dei_EntityRegistrantName" />
    <label xml:lang="en-US" xlink:label="dei_EntityRegistrantName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</label>
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    <label xml:lang="en-US" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</label>
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:type="locator" xlink:label="dei_CurrentFiscalYearEndDate" />
    <label xml:lang="en-US" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</label>
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    <loc xlink:href="amsf-20160930.xsd#amsf_InsuranceRelatedAssessments" xlink:type="locator" xlink:label="amsf_InsuranceRelatedAssessments" />
    <label xml:lang="en-US" xlink:label="amsf_InsuranceRelatedAssessments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Assessments mandated by statute or regulatory authority that is related directly or indirectly to underwriting activities, including pools for self-insurance and excluding premium taxes and income taxes. The funds derived from the assessments generally enable a government guarantor to pay insurance claims in the event that the underwriting insurer is insolvent or otherwise unable to meet its payment obligations.</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfFinancialPositionAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Financial Position [Abstract]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsAbstract" xlink:type="locator" xlink:label="us-gaap_InvestmentsAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_InvestmentsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments:</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_InvestmentsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:type="locator" xlink:label="us-gaap_HeldToMaturitySecurities" />
    <label xml:lang="en-US" xlink:label="us-gaap_HeldToMaturitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fixed maturity securities&#8212;held-to-maturity, at amortized cost (fair value $620,781 and $662,276 in 2016 and 2015, respectively)</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:type="locator" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities" />
    <label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fixed maturity securities&#8212;available-for-sale, at fair value (cost $460,497 and $376,109 in 2016 and 2015, respectively)</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesAuthorized" />
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    <loc xlink:href="amsf-20160930.xsd#amsf_UnderwritingAndCertainOtherOperatingCosts" xlink:type="locator" xlink:label="amsf_UnderwritingAndCertainOtherOperatingCosts" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:type="locator" xlink:label="us-gaap_IncomeStatementAbstract" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PremiumsWrittenGross" xlink:type="locator" xlink:label="us-gaap_PremiumsWrittenGross" />
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    <label xml:lang="en-US" xlink:label="us-gaap_Revenues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total revenues</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InsuranceCommissions" xlink:type="locator" xlink:label="us-gaap_InsuranceCommissions" />
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    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issued upon exercise of options</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax benefit from share-based payments</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment To Additional Paid In Capital Income Tax Effect From Share Based Compensation Net</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" />
    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted common stock issued</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Additional Paid In Capital Share Based Compensation Restricted Stock Units Requisite Service Period Recognition</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted common stock issued, Shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares New Issues</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition" />
    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsCommonStock" xlink:type="locator" xlink:label="us-gaap_DividendsCommonStock" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividends to shareholders</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStock" xlink:to="us-gaap_DividendsCommonStock_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Common Stock</label>
    <label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance</label>
    <label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance, Shares</label>
    <label xml:lang="en-US" xlink:label="us-gaap_TreasuryStockShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodEndLabel">Treasury Stock Ending Balance, Shares</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_MarketableSecuritiesRealizedGainLossLessMoneyMarketFunds" xlink:type="locator" xlink:label="amsf_MarketableSecuritiesRealizedGainLossLessMoneyMarketFunds" />
    <label xml:lang="en-US" xlink:label="amsf_MarketableSecuritiesRealizedGainLossLessMoneyMarketFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity less money market funds. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_MarketableSecuritiesRealizedGainLossLessMoneyMarketFunds" xlink:to="amsf_MarketableSecuritiesRealizedGainLossLessMoneyMarketFunds_lbl" />
    <loc xlink:href="amsf-20160930.xsd#amsf_IncreaseDecreaseReinsuranceBalances" xlink:type="locator" xlink:label="amsf_IncreaseDecreaseReinsuranceBalances" />
    <label xml:lang="en-US" xlink:label="amsf_IncreaseDecreaseReinsuranceBalances_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase decrease reinsurance balances.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_IncreaseDecreaseReinsuranceBalances" xlink:to="amsf_IncreaseDecreaseReinsuranceBalances_lbl" />
    <loc xlink:href="amsf-20160930.xsd#amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits" xlink:type="locator" xlink:label="amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits" />
    <label xml:lang="en-US" xlink:label="amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase decrease amounts held for others and policyholder deposits.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits" xlink:to="amsf_IncreaseDecreaseAmountsHeldForOthersAndPolicyholderDeposits_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Cash Flows [Abstract]</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating activities</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net income to net cash provided by operating activities:</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" xlink:label="us-gaap_Depreciation" />
    <label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:type="locator" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net amortization of investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:to="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accretion Amortization Of Discounts And Premiums Investments</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:type="locator" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Income Tax Expense Benefit</label>
    <label xml:lang="en-US" xlink:label="amsf_MarketableSecuritiesRealizedGainLossLessMoneyMarketFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net realized (gains) losses on investments</label>
    <label xml:lang="en-US" xlink:label="amsf_MarketableSecuritiesRealizedGainLossLessMoneyMarketFunds_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Marketable Securities Realized Gain Loss Less Money Market Funds</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" />
    <label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net realized losses on disposal of assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:to="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Sale Of Property Plant Equipment</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensation" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Operating Capital [Abstract]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPremiumsReceivable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPremiumsReceivable" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPremiumsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Premiums receivable, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPremiumsReceivable" xlink:to="us-gaap_IncreaseDecreaseInPremiumsReceivable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPremiumsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Premiums Receivable</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accrued interest receivable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accrued Investment Income Receivable</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deferred policy acquisition costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts" xlink:to="us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInDeferredPolicyAcquisitionCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Deferred Policy Acquisition Costs</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDepositOtherAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInDepositOtherAssets" />
    <label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInDepositOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Amounts held by others</label>
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    <loc xlink:href="amsf-20160930.xsd#amsf_HeldToMaturitySecuritiesTableTextBlock" xlink:type="locator" xlink:label="amsf_HeldToMaturitySecuritiesTableTextBlock" />
    <label xml:lang="en-US" xlink:label="amsf_HeldToMaturitySecuritiesTableTextBlock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value schedule of assets carried at amortized cost.</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:type="locator" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock" />
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    <loc xlink:href="amsf-20160930.xsd#amsf_PercentageOfComparableConsolidatedAmount" xlink:type="locator" xlink:label="amsf_PercentageOfComparableConsolidatedAmount" />
    <label xml:lang="en-US" xlink:label="amsf_PercentageOfComparableConsolidatedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of comparable consolidated amount.</label>
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    <label xml:lang="en-US" xlink:label="amsf_PercentageOfComparableConsolidatedAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Comparable Consolidated Amount</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_NumberOfEquityIncentivePlans" xlink:type="locator" xlink:label="amsf_NumberOfEquityIncentivePlans" />
    <label xml:lang="en-US" xlink:label="amsf_NumberOfEquityIncentivePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of equity incentive plans.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_NumberOfEquityIncentivePlans" xlink:to="amsf_NumberOfEquityIncentivePlans_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</label>
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    <label xml:lang="en-US" xlink:label="amsf_TwoThousandFiveIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Five Incentive Plan [Member]</label>
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    <label xml:lang="en-US" xlink:label="amsf_TwoThousandFiveIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Five Incentive Plan [Member]</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:type="locator" xlink:label="us-gaap_RestrictedStockUnitsRSUMember" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:type="locator" xlink:label="us-gaap_TitleOfIndividualAxis" />
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    <label xml:lang="en-US" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Relationship to Entity</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExecutiveOfficerMember" xlink:type="locator" xlink:label="us-gaap_ExecutiveOfficerMember" />
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    <loc xlink:href="amsf-20160930.xsd#amsf_NonEmployeeDirectorMember" xlink:type="locator" xlink:label="amsf_NonEmployeeDirectorMember" />
    <label xml:lang="en-US" xlink:label="amsf_NonEmployeeDirectorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Non-employee directors.</label>
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    <label xml:lang="en-US" xlink:label="amsf_NonEmployeeDirectorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Non Employee Director [Member]</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_TwoThousandTwelveIncentivePlanMember" xlink:type="locator" xlink:label="amsf_TwoThousandTwelveIncentivePlanMember" />
    <label xml:lang="en-US" xlink:label="amsf_TwoThousandTwelveIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twelve incentive plan.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_TwoThousandTwelveIncentivePlanMember" xlink:to="amsf_TwoThousandTwelveIncentivePlanMember_lbl" />
    <label xml:lang="en-US" xlink:label="amsf_TwoThousandTwelveIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2012 Incentive Plan [Member]</label>
    <label xml:lang="en-US" xlink:label="amsf_TwoThousandTwelveIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twelve Incentive Plan [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</label>
    <label xml:lang="en-US" xlink:label="amsf_NumberOfEquityIncentivePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of equity incentive plans</label>
    <label xml:lang="en-US" xlink:label="amsf_NumberOfEquityIncentivePlans_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Equity Incentive Plans</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate" />
    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan expiration date</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Expiration Date</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" />
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    <label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Available-for-Sale, Fair Value</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:type="locator" xlink:label="us-gaap_PortionAtFairValueFairValueDisclosureMember" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:type="locator" xlink:label="us-gaap_CarryingReportedAmountFairValueDisclosureMember" />
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    <label xml:lang="en-US" xlink:label="us-gaap_CarryingReportedAmountFairValueDisclosureMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Carrying Reported Amount Fair Value Disclosure [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:to="us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_lbl" />
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    <label xml:lang="en-US" xlink:label="us-gaap_HeldToMaturitySecuritiesFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/positiveLabel">Fixed maturity securities-held-to-maturity</label>
    <label xml:lang="en-US" xlink:label="us-gaap_HeldToMaturitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fixed maturity securities-held-to-maturity</label>
    <label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesDebtSecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fixed maturity securities-available-for-sale</label>
    <label xml:lang="en-US" xlink:label="us-gaap_AvailableForSaleSecuritiesEquitySecurities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity securities</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure" />
    <label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:to="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash And Cash Equivalents Fair Value Disclosure</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_InvestmentsFairValueDisclosure" />
    <label xml:lang="en-US" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other investments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsFairValueDisclosure" xlink:to="us-gaap_InvestmentsFairValueDisclosure_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_InvestmentsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investments Fair Value Disclosure</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_SharePurchasedUnderShareRepurchaseProgramValue" xlink:type="locator" xlink:label="amsf_SharePurchasedUnderShareRepurchaseProgramValue" />
    <label xml:lang="en-US" xlink:label="amsf_SharePurchasedUnderShareRepurchaseProgramValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Purchased Under Share Repurchase Program Value.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_SharePurchasedUnderShareRepurchaseProgramValue" xlink:to="amsf_SharePurchasedUnderShareRepurchaseProgramValue_lbl" />
    <loc xlink:href="amsf-20160930.xsd#amsf_ShareRepurchasesPricePaidPerShare" xlink:type="locator" xlink:label="amsf_ShareRepurchasesPricePaidPerShare" />
    <label xml:lang="en-US" xlink:label="amsf_ShareRepurchasesPricePaidPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Repurchases Price Paid Per Share.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_ShareRepurchasesPricePaidPerShare" xlink:to="amsf_ShareRepurchasesPricePaidPerShare_lbl" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ClassOfTreasuryStockTable" xlink:type="locator" xlink:label="us-gaap_ClassOfTreasuryStockTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_ClassOfTreasuryStockTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Treasury Stock [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfTreasuryStockTable" xlink:to="us-gaap_ClassOfTreasuryStockTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ClassOfTreasuryStockTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Treasury Stock [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventMember" xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityClassOfTreasuryStockLineItems" xlink:type="locator" xlink:label="us-gaap_EquityClassOfTreasuryStockLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_EquityClassOfTreasuryStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity, Class of Treasury Stock [Line Items]</label>
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:type="locator" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share repurchase program, new limit amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:to="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchase Program Authorized Amount1</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockRepurchaseProgramExpirationDate" xlink:type="locator" xlink:label="us-gaap_StockRepurchaseProgramExpirationDate" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share repurchase program, expiration date</label>
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    <label xml:lang="en-US" xlink:label="amsf_SharePurchasedUnderShareRepurchaseProgramValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Purchased Under Share Repurchase Program Value</label>
    <label xml:lang="en-US" xlink:label="amsf_ShareRepurchasesPricePaidPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares repurchased, average price</label>
    <label xml:lang="en-US" xlink:label="amsf_ShareRepurchasesPricePaidPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchases Price Paid Per Share</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:type="locator" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares" />
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares repurchased under the program</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period Shares</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_AppealBond" xlink:type="locator" xlink:label="amsf_AppealBond" />
    <label xml:lang="en-US" xlink:label="amsf_AppealBond_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Appeal bond.</label>
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    <loc xlink:href="amsf-20160930.xsd#amsf_WorkersCompensationClaimsContingencyReserves" xlink:type="locator" xlink:label="amsf_WorkersCompensationClaimsContingencyReserves" />
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    <loc xlink:href="amsf-20160930.xsd#amsf_WorkersCompensationClaimsContingencyReservesAndExpensesPaid" xlink:type="locator" xlink:label="amsf_WorkersCompensationClaimsContingencyReservesAndExpensesPaid" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesTable" xlink:type="locator" xlink:label="us-gaap_LossContingenciesTable" />
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesTable" xlink:to="us-gaap_LossContingenciesTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Table]</label>
    <loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis" />
    <label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal Entity</label>
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    <label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</label>
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    <label xml:lang="en-US" xlink:label="dei_EntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_AmericanInterstateInsuranceCompanyMember" xlink:type="locator" xlink:label="amsf_AmericanInterstateInsuranceCompanyMember" />
    <label xml:lang="en-US" xlink:label="amsf_AmericanInterstateInsuranceCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">American Interstate Insurance Company [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_AmericanInterstateInsuranceCompanyMember" xlink:to="amsf_AmericanInterstateInsuranceCompanyMember_lbl" />
    <label xml:lang="en-US" xlink:label="amsf_AmericanInterstateInsuranceCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">American Interstate Insurance Company [Member]</label>
    <label xml:lang="en-US" xlink:label="amsf_AmericanInterstateInsuranceCompanyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">American Interstate Insurance Company [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:type="locator" xlink:label="us-gaap_LossContingenciesByNatureOfContingencyAxis" />
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    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:type="locator" xlink:label="us-gaap_LossContingencyNatureDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingency, Nature</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyNatureDomain" xlink:to="us-gaap_LossContingencyNatureDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LossContingencyNatureDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Nature [Domain]</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_TwoThousandAndNineWorkersCompensationClaimMember" xlink:type="locator" xlink:label="amsf_TwoThousandAndNineWorkersCompensationClaimMember" />
    <label xml:lang="en-US" xlink:label="amsf_TwoThousandAndNineWorkersCompensationClaimMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand And Nine Workers Compensation Claim [Member]</label>
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    <label xml:lang="en-US" xlink:label="amsf_TwoThousandAndNineWorkersCompensationClaimMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2009 Workers&apos; Compensation Claim [Member]</label>
    <label xml:lang="en-US" xlink:label="amsf_TwoThousandAndNineWorkersCompensationClaimMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand And Nine Workers Compensation Claim [Member]</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_PlaintiffSeekingActualDamagesMember" xlink:type="locator" xlink:label="amsf_PlaintiffSeekingActualDamagesMember" />
    <label xml:lang="en-US" xlink:label="amsf_PlaintiffSeekingActualDamagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Plaintiff Seeking Actual Damages [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_PlaintiffSeekingActualDamagesMember" xlink:to="amsf_PlaintiffSeekingActualDamagesMember_lbl" />
    <label xml:lang="en-US" xlink:label="amsf_PlaintiffSeekingActualDamagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plaintiff Seeking Actual Damages [Member]</label>
    <label xml:lang="en-US" xlink:label="amsf_PlaintiffSeekingActualDamagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plaintiff Seeking Actual Damages [Member]</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_PlaintiffSeekingPunitiveDamagesMember" xlink:type="locator" xlink:label="amsf_PlaintiffSeekingPunitiveDamagesMember" />
    <label xml:lang="en-US" xlink:label="amsf_PlaintiffSeekingPunitiveDamagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Plaintiff Seeking Punitive Damages [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_PlaintiffSeekingPunitiveDamagesMember" xlink:to="amsf_PlaintiffSeekingPunitiveDamagesMember_lbl" />
    <label xml:lang="en-US" xlink:label="amsf_PlaintiffSeekingPunitiveDamagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plaintiff Seeking Punitive Damages [Member]</label>
    <label xml:lang="en-US" xlink:label="amsf_PlaintiffSeekingPunitiveDamagesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plaintiff Seeking Punitive Damages [Member]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:type="locator" xlink:label="us-gaap_StatementGeographicalAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementGeographicalAxis" xlink:to="us-gaap_StatementGeographicalAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_StatementGeographicalAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Geographical [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:type="locator" xlink:label="us-gaap_SegmentGeographicalDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentGeographicalDomain" xlink:to="us-gaap_SegmentGeographicalDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SegmentGeographicalDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Segment Geographical [Domain]</label>
    <loc xlink:href="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd#stpr_IA" xlink:type="locator" xlink:label="stpr_IA" />
    <label xml:lang="en-US" xlink:label="stpr_IA_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Iowa [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="stpr_IA" xlink:to="stpr_IA_lbl" />
    <label xml:lang="en-US" xlink:label="stpr_IA_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">IOWA</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:type="locator" xlink:label="us-gaap_LossContingenciesLineItems" />
    <label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss Contingencies [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingenciesLineItems" xlink:to="us-gaap_LossContingenciesLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LossContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingencies [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LitigationSettlementAmount" xlink:type="locator" xlink:label="us-gaap_LitigationSettlementAmount" />
    <label xml:lang="en-US" xlink:label="us-gaap_LitigationSettlementAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Workers compensation claim, damages awarded</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LitigationSettlementAmount" xlink:to="us-gaap_LitigationSettlementAmount_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LitigationSettlementAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Settlement Amount</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyDamagesAwardedValue" xlink:type="locator" xlink:label="us-gaap_LossContingencyDamagesAwardedValue" />
    <label xml:lang="en-US" xlink:label="us-gaap_LossContingencyDamagesAwardedValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of damages</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyDamagesAwardedValue" xlink:to="us-gaap_LossContingencyDamagesAwardedValue_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_LossContingencyDamagesAwardedValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loss Contingency Damages Awarded Value</label>
    <label xml:lang="en-US" xlink:label="amsf_AppealBond_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Appeal bond</label>
    <label xml:lang="en-US" xlink:label="amsf_AppealBond_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Appeal Bond</label>
    <label xml:lang="en-US" xlink:label="amsf_WorkersCompensationClaimsContingencyReserves_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Workers compensation claims contingency reserves</label>
    <label xml:lang="en-US" xlink:label="amsf_WorkersCompensationClaimsContingencyReserves_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Workers Compensation Claims Contingency Reserves</label>
    <label xml:lang="en-US" xlink:label="amsf_WorkersCompensationClaimsContingencyReservesAndExpensesPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total amount expensed on workers compensation claim</label>
    <label xml:lang="en-US" xlink:label="amsf_WorkersCompensationClaimsContingencyReservesAndExpensesPaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Workers Compensation Claims Contingency Reserves And Expenses Paid</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReinsuranceRetentionPolicyAmountRetained" xlink:type="locator" xlink:label="us-gaap_ReinsuranceRetentionPolicyAmountRetained" />
    <label xml:lang="en-US" xlink:label="us-gaap_ReinsuranceRetentionPolicyAmountRetained_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retention amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReinsuranceRetentionPolicyAmountRetained" xlink:to="us-gaap_ReinsuranceRetentionPolicyAmountRetained_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_ReinsuranceRetentionPolicyAmountRetained_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reinsurance Retention Policy Amount Retained</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTable" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTable" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTable_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsAxis" xlink:type="locator" xlink:label="us-gaap_DividendsAxis" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsAxis" xlink:to="us-gaap_DividendsAxis_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends [Axis]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsDomain" xlink:type="locator" xlink:label="us-gaap_DividendsDomain" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsDomain" xlink:to="us-gaap_DividendsDomain_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends [Domain]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendDeclaredMember" xlink:type="locator" xlink:label="us-gaap_DividendDeclaredMember" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendDeclaredMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend Declared [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendDeclaredMember" xlink:to="us-gaap_DividendDeclaredMember_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendDeclaredMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Declared [Member]</label>
    <loc xlink:href="amsf-20160930.xsd#amsf_ExtraordinaryDividendDeclaredMember" xlink:type="locator" xlink:label="amsf_ExtraordinaryDividendDeclaredMember" />
    <label xml:lang="en-US" xlink:label="amsf_ExtraordinaryDividendDeclaredMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Extraordinary dividend declared.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="amsf_ExtraordinaryDividendDeclaredMember" xlink:to="amsf_ExtraordinaryDividendDeclaredMember_lbl" />
    <label xml:lang="en-US" xlink:label="amsf_ExtraordinaryDividendDeclaredMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Extraordinary Dividend Declared [Member]</label>
    <label xml:lang="en-US" xlink:label="amsf_ExtraordinaryDividendDeclaredMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Extraordinary Dividend Declared [Member]</label>
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    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventLineItems_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPayableAmountPerShare" xlink:type="locator" xlink:label="us-gaap_DividendsPayableAmountPerShare" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableAmountPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash dividend per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableAmountPerShare" xlink:to="us-gaap_DividendsPayableAmountPerShare_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableAmountPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable Amount Per Share</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:type="locator" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date of payment to shareholders entitled to dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:to="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendPayableDateToBePaidDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Payable Date To Be Paid Day Month And Year</label>
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:type="locator" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date of record of shareholders entitled to dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:to="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" />
    <label xml:lang="en-US" xlink:label="us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable Date Of Record Day Month And Year</label>
    <label xml:lang="en-US" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share repurchase program, new limit amount</label>
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