XML 53 R39.htm IDEA: XBRL DOCUMENT v3.5.0.2

Fair Value of Financial Instruments (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value of Financial Instruments (Textual) [Abstract]
Embedded Derivative, Gain (Loss) on Embedded Derivative Total	$ (76)	$ 1,328	$ (2,077)	$ 1,795
Level 3 [Member]
Fair Value of Financial Instruments (Textual) [Abstract]
Embedded Derivative, Gain (Loss) on Embedded Derivative Total	$ (68)	$ 1,328	$ (2,066)	$ 1,795
Percentage Of Invested Assets In Total Investment Portfolio Level3 Recurring	2.80%		2.80%

X

- Definition

Fair value of financial instruments.

+ References

No definition available.

+ Details

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

X

- Definition

Percentage of invested assets in the total investment portfolio in Level 3 carried at fair value on a recurring basis.

+ References

No definition available.

+ Details

Name:	hmn_PercentageOfInvestedAssetsInTotalInvestmentPortfolioLevel3Recurring
Namespace Prefix:	hmn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

+ Details

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

X

- Details

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