XML 131 R102.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Reinsurance and Catastrophes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items] |  |  |  |
Losses incurred for catastrophe claims, carrying amount |  | $ 97,600 | $ 80,000 | $ 78,200
Reinsurance balances receivable |  | $ 424,200 | $ 462,500 |
Percentage of coverage for catastrophe losses above retention amount, layer one |  | 57.00% |  |
Coverage above retention per occurrence under layer one catastrophe reinsurance |  | $ 20,000 |  |
Retention base amount per occurrence under layer one |  | $ 30,000 |  |
Percentage of coverage for catastrophe losses above retention amount, layer two |  | 92.00% |  |
Coverage above retention per occurrence under layer two catastrophe reinsurance |  | $ 40,000 |  |
Retention base amount per occurrence under layer two |  | $ 50,000 |  |
Percentage of coverage for catastrophe losses above retention amount, layer three |  | 95.00% |  |
Coverage above retention per occurrence under layer three catastrophe reinsurance |  | $ 85,000 |  |
Retention base amount per occurrence under layer three |  | 90,000 |  |
Reinsured amount of each loss above retention in clash event |  | 20,000 |  |
Amount of maximum individual life insurance risk retained |  | $ 500 |  |
Percentage of life reinsured catastrophe risk in excess specified retention per occurrence amount |  | 100.00% |  |
Other accidental death and dismemberment risk, ceded, percent |  | 100.00% |  |
Employer sponsored products, gross assumed group disability and specialty health benefits retained, percent |  | 72.40% |  |
Individual life and annuity benefits, ceded, percent |  | 100.00% |  |
Forecast |  |  |  |
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items] |  |  |  |
Percentage of coverage for catastrophe losses above retention amount, layer one | 89.00% |  |  |
Coverage above retention per occurrence under layer one catastrophe reinsurance | $ 25,000 |  |  |
Retention base amount per occurrence under layer one | $ 35,000 |  |  |
Percentage of coverage for catastrophe losses above retention amount, layer two | 90.00% |  |  |
Coverage above retention per occurrence under layer two catastrophe reinsurance | $ 35,000 |  |  |
Retention base amount per occurrence under layer two | $ 60,000 |  |  |
Percentage of coverage for catastrophe losses above retention amount, layer three | 92.00% |  |  |
Coverage above retention per occurrence under layer three catastrophe reinsurance | $ 90,000 |  |  |
Retention base amount per occurrence under layer three | 95,000 |  |  |
Retention amount per occurrence related to catastrophe losses, layer one | $ 35,000 |  |  |
National Guardian Life Insurance Company NGL |  |  |  |
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items] |  |  |  |
Reinsurance balances receivable |  | $ 181,000 |  |
Reinsurance recoverable as a percentage of shareholders' equity, in excess |  | 10.00% |  |
Minimum |  |  |  |
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items] |  |  |  |
Liability coverages, Company reinsured each loss above a retention per occurrence |  | $ 5,000 |  |
Amount of group life policy insurance risk retained |  | 100 |  |
Amount life catastrophe risk retention per occurrence |  | 1,000 |  |
Maximum |  |  |  |
Reinsurance Recoverable on Unpaid Insurance Reserves [Line Items] |  |  |  |
Amount of group life policy insurance risk retained |  | 125 |  |
Amount life catastrophe risk retention per occurrence |  | $ 35,000 |  |

X
- Definition Amount life catastrophe risk retention per occurrence. + References No definition available. + Details
Name: | hmn_AmountLifeCatastropheRiskRetentionPerOccurrence
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of maximum group life policy insurance risk retained. + References No definition available. + Details
Name: | hmn_AmountOfGroupLifePolicyInsuranceRiskRetained
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of maximum individual life insurance risk retained. + References No definition available. + Details
Name: | hmn_AmountOfMaximumIndividualLifeInsuranceRiskRetained
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Coverage provided above retention per occurrence under layer one of catastrophe excess of loss reinsurance coverage. + References No definition available. + Details
Name: | hmn_CoverageAboveRetentionPerOccurrenceUnderLayerOneCatastropheReinsurance
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Coverage provided above retention per occurrence under layer three of catastrophe excess of loss reinsurance coverage. + References No definition available. + Details
Name: | hmn_CoverageAboveRetentionPerOccurrenceUnderLayerThreeCatastropheReinsurance
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Coverage provided above retention per occurrence under layer two of catastrophe excess of loss reinsurance coverage. + References No definition available. + Details
Name: | hmn_CoverageAboveRetentionPerOccurrenceUnderLayerTwoCatastropheReinsurance
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Employer Sponsored Products, Gross Assumed Group Disability And Specialty Health Benefits Retained, Percent + References No definition available. + Details
Name: | hmn_EmployerSponsoredProductsGrossAssumedGroupDisabilityAndSpecialtyHealthBenefitsRetainedPercent
Namespace Prefix: | hmn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Individual Life And Annuity Benefits, Ceded, Percent + References No definition available. + Details
Name: | hmn_IndividualLifeAndAnnuityBenefitsCededPercent
Namespace Prefix: | hmn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other Accidental Death And Dismemberment Risk, Ceded, Percent + References No definition available. + Details
Name: | hmn_OtherAccidentalDeathAndDismembermentRiskCededPercent
Namespace Prefix: | hmn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of coverage for catastrophe losses above retention amount. + References No definition available. + Details
Name: | hmn_PercentageOfCoverageForCatastropheLossesAboveRetentionAmountScenarioOne
Namespace Prefix: | hmn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Coverage For Catastrophe Losses Above Retention Amount, Scenario Three + References No definition available. + Details
Name: | hmn_PercentageOfCoverageForCatastropheLossesAboveRetentionAmountScenarioThree
Namespace Prefix: | hmn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Coverage For Catastrophe Losses Above Retention Amount, Scenario Two + References No definition available. + Details
Name: | hmn_PercentageOfCoverageForCatastropheLossesAboveRetentionAmountScenarioTwo
Namespace Prefix: | hmn_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of life reinsured catastrophe risk in excess specified retention per occurrence amount. + References No definition available. + Details
Name: | hmn_PercentageOfLifeReinsuredCatastropheRiskInExcessSpecifiedRetentionPerOccurrenceAmount
Namespace Prefix: | hmn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | hmn_ReinsuranceRecoverableOnUnpaidInsuranceReservesLineItems
Namespace Prefix: | hmn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reinsurance Recoverable Percentage Of Equity, In Excess + References No definition available. + Details
Name: | hmn_ReinsuranceRecoverablePercentageOfEquityInExcess
Namespace Prefix: | hmn_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reinsured amount of each loss above retention in clash event. + References No definition available. + Details
Name: | hmn_ReinsuredAmountOfEachLossAboveRetentionInClashEvent
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Retention amount of each liability coverage loss per occurrence. + References No definition available. + Details
Name: | hmn_RetentionAmountOfEachLiabilityLossPerOccurrence
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Retention amount per occurrence related to catastrophe losses. + References No definition available. + Details
Name: | hmn_RetentionAmountPerOccurrenceRelatedToCatastropheLossesScenarioOne
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Retention base amount per occurrence under layer one. + References No definition available. + Details
Name: | hmn_RetentionBaseAmountPerOccurrenceUnderLayerOne
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Retention base amount per occurrence under layer three. + References No definition available. + Details
Name: | hmn_RetentionBaseAmountPerOccurrenceUnderLayerThree
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Retention base amount per occurrence under layer two. + References No definition available. + Details
Name: | hmn_RetentionBaseAmountPerOccurrenceUnderLayerTwo
Namespace Prefix: | hmn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The charge against earnings in the period for the uninsured portion of a loss from a fire, explosion, or natural disaster (hurricane, earthquake). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
Name: | us-gaap_LossFromCatastrophes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479838/944-20-50-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479616/944-310-45-5 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
Name: | us-gaap_ReinsuranceRecoverables
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=hmn_NationalGuardianLifeInsuranceCompanyNGLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |