XML 350 R94.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Shareholders' Equity and Common Stock Equivalents - Stock Option Activity (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Weighted Average Option Price per Share |  |  |
Weighted Average Option Price per Share, Beginning Balance (in usd per share) | $ 32.80 |  |
Weighted Average Option Price per Share, Options Granted (in usd per share) | 43.04 |  |
Weighted Average Option Price per Share, Options Vested (in usd per share) | 31.42 |  |
Weighted Average Option Price per Share, Options Exercised (in usd per share) | 27.07 |  |
Weighted Average Option Price per Share, Options Forfeited (in usd per share) | 39.07 |  |
Weighted Average Option Price per Share, Options Expired (in usd per share) | 0 |  |
Weighted Average Option Price per Share, Ending Balance (in usd per share) | $ 36.65 | $ 32.80 |
Outstanding |  |  |
Options Outstanding, Beginning Balance (in shares) | 719,015 | 747,032 |
Options Outstanding, Granted (in shares) | 223,208 | 222,828 | 307,176
Options Outstanding, Vested (in shares) | 0 |  |
Options Outstanding, Exercised (in shares) | (145,438) |  |
Options Outstanding, Forfeited (in shares) | (21,964) |  |
Options Outstanding, Expired (in shares) | 0 |  |
Options Outstanding, Ending Balance (in shares) | 774,821 | 719,015 | 747,032
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Exercisable [Roll Forward] |  |  |
Options Vested and Exercisable, Beginning Balance (in shares) | 258,321 |  |
Options Vested and Exercisable, Granted (in shares) | 0 |  |
Options Vested and Exercisable, Vested (in shares) | 158,233 |  |
Options Vested and Exercisable, Exercisable (in shares) | (145,438) |  |
Options Vested and Exercisable, Forfeited (in shares) | 0 |  |
Options Vested and Exercisable, Expired (in shares) | 0 |  |
Options Vested and Exercisable, Ending Balance (in shares) | 271,116 | 258,321 |
Minimum |  |  |
Weighted Average Option Price per Share |  |  |
Weighted Average Option Price per Share, Ending Balance (in usd per share) | $ 41.95 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Range of Option Prices [Roll Forward] |  |  |
Range of Option Prices per Share, Beginning Balance (in usd per share) | 17.01 |  |
Range of Option Prices per Share, Granted (in usd per share) | 42.95 |  |
Range of Option Prices per Share, Vested (in usd per share) | 17.32 |  |
Range of Option Prices per Share, Exercised (in usd per share) | 17.01 |  |
Range of Option Prices per Share, Forfeited (in usd per share) | 31.01 |  |
Range of Option Prices per Share, Expired (in usd per share) | 0 |  |
Range of Option Prices per Share, Ending Balance (in usd per share) | 17.32 | $ 17.01 |
Maximum |  |  |
Weighted Average Option Price per Share |  |  |
Weighted Average Option Price per Share, Ending Balance (in usd per share) | 44.75 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Range of Option Prices [Roll Forward] |  |  |
Range of Option Prices per Share, Beginning Balance (in usd per share) | 41.95 |  |
Range of Option Prices per Share, Granted (in usd per share) | 44.75 |  |
Range of Option Prices per Share, Vested (in usd per share) | 41.95 |  |
Range of Option Prices per Share, Exercised (in usd per share) | 41.95 |  |
Range of Option Prices per Share, Forfeited (in usd per share) | 42.95 |  |
Range of Option Prices per Share, Expired (in usd per share) | 0 |  |
Range of Option Prices per Share, Ending Balance (in usd per share) | $ 44.75 | $ 41.95 |

X
- Definition Share based compensation arrangement by share based payment award options vested and exercisable exercised in period. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableExercisedInPeriod
Namespace Prefix: | hmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award options vested and exercisable expired in period. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableExpiredInPeriod
Namespace Prefix: | hmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award options vested and exercisable forfeited in period. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableForfeitedInPeriod
Namespace Prefix: | hmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Exercisable Granted In Period. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableGrantedInPeriod
Namespace Prefix: | hmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangement by share based payment award options vested and exercisable outstanding number. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableOutstandingNumber
Namespace Prefix: | hmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share based compensation arrangement by share based payment award options vested and exercisable vested in period. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableVestedInPeriod
Namespace Prefix: | hmn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation arrangements by share based payment award options vested in period weighted average exercise price. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice
Namespace Prefix: | hmn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation shares exercised under stock option plans exercise price range. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationSharesExercisedUnderStockOptionPlansExercisePriceRange
Namespace Prefix: | hmn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation shares expired under stock option plans exercise price range. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationSharesExpiredUnderStockOptionPlansExercisePriceRange
Namespace Prefix: | hmn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation shares forfeited under stock option plans exercise price range. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationSharesForfeitedUnderStockOptionPlansExercisePriceRange
Namespace Prefix: | hmn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation shares granted under stock option plans exercise price range. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationSharesGrantedUnderStockOptionPlansExercisePriceRange
Namespace Prefix: | hmn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation shares vested under stock option plans exercise price range. + References No definition available. + Details
Name: | hmn_ShareBasedCompensationSharesVestedUnderStockOptionPlansExercisePriceRange
Namespace Prefix: | hmn_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Exercisable [Roll Forward] + References No definition available. + Details
Name: | hmn_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExercisableRollForward
Namespace Prefix: | hmn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Number of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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: |