Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldChangeDueToLoanChargeOffs
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of reduction, resulting from payments or refinances of a loan, in the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

No definition available.

Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldChangeDueToPaymentsOrRefinances
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of adjustment to contractual principal receivable of certain loans acquired in transfer not accounted for as debt securities due to loan charge-offs.

No definition available.

Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesContractualPrincipalReceivableChangeDueToLoanChargeOffs
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of adjustment to contractual principal receivable of certain loans acquired in transfer not accounted for as debt securities due to payments or refinances.

No definition available.

Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesContractualPrincipalReceivableChangeDueToPaymentsOrRefinances
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Amount of adjustment, resulting from loan charge-offs, to net carrying receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality,

No definition available.

Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesNetCarryingAmountChangeDueToLoanChargeOffs
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Amount of adjustment to net carrying receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

No definition available.

Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesNetCarryingAmountChangeDueToPaymentsOrRefinances
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Adjustment to non-accretable difference due to payments or refinances in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

No definition available.

Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesNonAccretableDifference
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of non-accretable difference in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

No definition available.

Name:	hmnf_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesNonaAcretableDifference
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of accretable difference in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

No definition available.

Name:	hmnf_PurchasedPerformingLoansMemberAccretableDifference
Namespace Prefix:	hmnf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538

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

The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538

Name:	us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesCarryingAmountNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544