The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined).

No definition available.

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

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the change in accretable difference due to loan charge-offs.

No definition available.

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

No definition available.

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

No definition available.

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

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the carrying amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

No definition available.

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

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the change in carrying amounts receivable due to loan charge-offs.

No definition available.

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

No definition available.

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

No definition available.

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

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the change in gross contractual amounts receivable due to loan charge-offs.

No definition available.

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

No definition available.

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

No definition available.

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

- References

No definition available.

Name:	hmnf_Note6AllowanceforLoanLossesandCreditQualityInformationDetailsPurchasedPerformingLoansAcquiredThroughKassonStateBankAcquisitionLineItems
Namespace Prefix:	hmnf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

For receivables acquired in a business combination, excluding certain loans and debt securities acquired in a transfer (as defined), this element represents the gross contractual amounts receivable, by major class of receivable, such as loans, direct finance leases (as defined), and any other class of receivables.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472