Fair value measurement with unobservable inputs reconciliation recurring basis asset paydowns and maturities.

No definition available.

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Namespace Prefix:	hmn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	hmn_FinancialAssetsAbstract
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- Details

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- Definition

Amount of gain (loss) recognized in earnings, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of gain (loss) recognized in other comprehensive income, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3).

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Issues that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Purchases that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Sales that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Transfers into assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Transfers out of assets measured at fair value and categorized within Level 3 of the fair value hierarchy that have taken place during the period.

+ References

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 32

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
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Data Type:	xbrli:monetaryItemType
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Fair Value of Financial Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Financial Assets
Beginning balance	$ 129,555	$ 34,830	$ 93,173	$ 46,585
Transfers into Level 3	9,407	17,389	26,744	17,389
Transfers out of Level 3	(45,460)	(2,335)	(50,707)	(13,725)
Total gain or losses
Net realized gains (losses) included in net income	1,123		2,308
Net unrealized gains (losses) included in other comprehensive income	2,734	961	1,111	847
Purchases	25,000		50,000
Issuances
Sales
Settlements
Paydowns and maturities	(296)	(352)	(566)	(603)
Ending balance	122,063	50,493	122,063	50,493
Corporate bonds [Member]
Financial Assets
Beginning balance	89,920	33,557	88,256	45,244
Transfers into Level 3	9,407	17,389	18,240	17,389
Transfers out of Level 3	(45,460)	(2,335)	(50,707)	(13,725)
Total gain or losses
Net realized gains (losses) included in net income
Net unrealized gains (losses) included in other comprehensive income	2,725	967	946	845
Purchases
Issuances
Sales
Settlements
Paydowns and maturities	(133)	(293)	(276)	(468)
Ending balance	56,459	49,285	56,459	49,285
Other mortgage-backed securities [Member]
Financial Assets
Beginning balance	13,065	877	4,532	945
Transfers into Level 3			8,504
Transfers out of Level 3
Total gain or losses
Net realized gains (losses) included in net income
Net unrealized gains (losses) included in other comprehensive income	9	6	165	14
Purchases
Issuances
Sales
Settlements
Paydowns and maturities	(163)	(59)	(290)	(135)
Ending balance	12,911	824	12,911	824
Total Fixed Maturities [Member]
Financial Assets
Beginning balance	102,985	34,434	92,788	46,189
Transfers into Level 3	9,407	17,389	26,744	17,389
Transfers out of Level 3	(45,460)	(2,335)	(50,707)	(13,725)
Total gain or losses
Net realized gains (losses) included in net income
Net unrealized gains (losses) included in other comprehensive income	2,734	973	1,111	859
Purchases
Issuances
Sales
Settlements
Paydowns and maturities	(296)	(352)	(566)	(603)
Ending balance	69,370	50,109	69,370	50,109
Equity Securities [Member]
Financial Assets
Beginning balance	385	396	385	396
Transfers into Level 3
Transfers out of Level 3
Total gain or losses
Net realized gains (losses) included in net income
Net unrealized gains (losses) included in other comprehensive income		(12)		(12)
Purchases
Issuances
Sales
Settlements
Paydowns and maturities
Ending balance	385	384	385	384
Other Investments [Member]
Financial Assets
Beginning balance	26,185
Transfers into Level 3
Transfers out of Level 3
Total gain or losses
Net realized gains (losses) included in net income	1,123		2,308
Net unrealized gains (losses) included in other comprehensive income
Purchases	25,000		50,000
Issuances
Sales
Settlements
Paydowns and maturities
Ending balance	$ 52,308		$ 52,308