XML 62 R38.htm IDEA: XBRL DOCUMENT v3.7.0.1

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
U.S. Government and federally sponsored agency obligations:
Carrying Amount	$ 7,770,221	$ 7,663,469
Fair Value	7,770,221	7,663,469
Investment contract and life policy reserves, embedded derivatives, Carrying Amount	236	158
Investment contract and life policy reserves, embedded derivatives, Fair Value Disclosure	236	158
Other policyholder funds, embedded derivatives, Carrying Amount	64,261	59,393
Other policyholder funds, embedded derivatives, Fair Value Disclosure	64,261	59,393
Recurring [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	7,510,750	7,456,708
Fair Value	7,510,750	7,456,708
Short-term investments [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	81,064	44,918
Fair Value	81,064	44,918
Mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	609,807	614,891
Fair Value	609,807	614,891
Other, including U.S. Treasury Securities [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	531,308	467,143
Fair Value	531,308	467,143
Municipal bonds [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	1,777,427	1,769,397
Fair Value	1,777,427	1,769,397
Foreign government bonds [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	99,686	98,669
Fair Value	99,686	98,669
Corporate bonds [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	2,837,173	2,810,221
Fair Value	2,837,173	2,810,221
Other mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	1,655,349	1,696,387
Fair Value	1,655,349	1,696,387
Equity securities [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	156,975	141,649
Fair Value	156,975	141,649
Other Investment [Member]
U.S. Government and federally sponsored agency obligations:
Carrying Amount	21,432	20,194
Fair Value	21,432	20,194
Level 1 [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	210,224	169,962
Investment contract and life policy reserves, embedded derivatives, Fair Value Disclosure	0	0
Other policyholder funds, embedded derivatives, Fair Value Disclosure	0	0
Level 1 [Member] | Recurring [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	27,792	27,163
Level 1 [Member] | Short-term investments [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	79,859	44,167
Level 1 [Member] | Mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	0
Level 1 [Member] | Other, including U.S. Treasury Securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	13,619	13,631
Level 1 [Member] | Municipal bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	0
Level 1 [Member] | Foreign government bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	0
Level 1 [Member] | Corporate bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	14,173	13,532
Level 1 [Member] | Other mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	0
Level 1 [Member] | Equity securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	102,573	98,632
Level 1 [Member] | Other Investment [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	0
Level 2 [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	7,311,240	7,281,403
Investment contract and life policy reserves, embedded derivatives, Fair Value Disclosure	236	158
Other policyholder funds, embedded derivatives, Fair Value Disclosure	0	0
Level 2 [Member] | Recurring [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	7,234,207	7,218,198
Level 2 [Member] | Short-term investments [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	1,205	0
Level 2 [Member] | Mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	605,863	611,476
Level 2 [Member] | Other, including U.S. Treasury Securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	517,689	453,512
Level 2 [Member] | Municipal bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	1,723,965	1,722,900
Level 2 [Member] | Foreign government bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	99,686	98,669
Level 2 [Member] | Corporate bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	2,740,505	2,736,498
Level 2 [Member] | Other mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	1,546,499	1,595,143
Level 2 [Member] | Equity securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	54,396	43,011
Level 2 [Member] | Other Investment [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	21,432	20,194
Level 3 [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	248,757	212,104
Investment contract and life policy reserves, embedded derivatives, Fair Value Disclosure	0	0
Other policyholder funds, embedded derivatives, Fair Value Disclosure	64,261	59,393
Level 3 [Member] | Recurring [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	248,751	211,347
Level 3 [Member] | Short-term investments [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	751
Level 3 [Member] | Mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	3,944	3,415
Level 3 [Member] | Other, including U.S. Treasury Securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	0
Level 3 [Member] | Municipal bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	53,462	46,497
Level 3 [Member] | Foreign government bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	0	0
Level 3 [Member] | Corporate bonds [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	82,495	60,191
Level 3 [Member] | Other mortgage-backed securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	108,850	101,244
Level 3 [Member] | Equity securities [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	6	6
Level 3 [Member] | Other Investment [Member]
U.S. Government and federally sponsored agency obligations:
Fair Value	$ 0	$ 0

X

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities.

+ References

No definition available.

+ Details

Name:	hmn_AvailableForSaleSecuritiesFairValue
Namespace Prefix:	hmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Carrying amount of accrued obligation to policyholders that relates to insured events under other insurance contracts.

+ References

No definition available.

+ Details

Name:	hmn_LiabilityForFuturePolicyBenefitsDerivativeInstrumentsCarryingAmount
Namespace Prefix:	hmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value disclosure of accrued obligation to policyholders that relates to insured events under other insurance contracts.

+ References

No definition available.

+ Details

Name:	hmn_LiabilityForFuturePolicyBenefitsDerivativeInstrumentsFairValueDisclosure
Namespace Prefix:	hmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Carrying amount liability as of the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported.

+ References

No definition available.

+ Details

Name:	hmn_OtherPolicyholderFundsDerivativeInstrumentsCarryingAmount
Namespace Prefix:	hmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value of the liability as of the policyholders for funds held that are returnable under the terms of insurance contracts that were not separately reported.

+ References

No definition available.

+ Details

Name:	hmn_OtherPolicyholderFundsDerivativeInstrumentsFairValueDisclosure
Namespace Prefix:	hmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

U.S. government and federally sponsored agency obligations.

+ References

No definition available.

+ Details

Name:	hmn_UsGovernmentAndFederallySponsoredAgencyObligationsAbstract
Namespace Prefix:	hmn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=hmn_OtherIncludingUsTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_ForeignGovernmentDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_MortgageBackedSecuritiesOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=hmn_OtherInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: