XML 116 R99.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Pension Plans and Other Postretirement Benefits (Details 3) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | $ 25,446 | $ 27,667
Fixed Income Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 12,402 | 13,720
Short-term Investments Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 716 | 422
United States [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | 9,836 | 10,844
International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | 2,492 | 2,681
Level 1 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 716 | 422
Level 1 [Member] | Fixed Income Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 0 | 0
Level 1 [Member] | Short-term Investments Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 716 | 422
Level 1 [Member] | United States [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | 0 | 0
Level 1 [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | 0 | 0
Level 2 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 24,730 | 27,245
Level 2 [Member] | Fixed Income Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 12,402 | 13,720
Level 2 [Member] | Short-term Investments Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 0 | 0
Level 2 [Member] | United States [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | 9,836 | 10,844
Level 2 [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | 2,492 | 2,681
Level 3 [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 0 | 0
Level 3 [Member] | Fixed Income Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 0 | 0
Level 3 [Member] | Short-term Investments Funds [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total |  | 0 | 0
Level 3 [Member] | United States [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | 0 | 0
Level 3 [Member] | International [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total | [1] | $ 0 | $ 0
[1] | None of the trust fund assets for the defined benefit pension plan have been invested in shares of HMEC’s common stock.

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition If aggregate disclosures are presented, the aggregate fair value of plan assets for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2417-114920 + Details
Name: | us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=hmn_ShorttermInvestmentsFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_ForeignPensionPlansDefinedBenefitMember
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: |