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Loans Receivable (Details 2) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Commercial Real Estate [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | $ 211,162 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | $ 195,349 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Commercial Participations Purchased [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 2,289 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 1,273 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Commercial Loan [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 58,682 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 57,716 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Residential Real Estate [Member] | Consumer Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 189,529 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialRealEstateMember | 161,664 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialRealEstateMember
Consumer Loan [Member] | Consumer Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 357 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember | 232 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
Government [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 26,134 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember | 21,587 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember
Modest Risk [Member] | Commercial Real Estate [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember
Modest Risk [Member] | Commercial Participations Purchased [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember
Modest Risk [Member] | Commercial Loan [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 4,920 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember | 4,279 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember
Modest Risk [Member] | Government [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = nwin_ModestRiskMember
Acceptable Risk [Member] | Commercial Real Estate [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 170,423 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember | 150,303 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember
Acceptable Risk [Member] | Commercial Participations Purchased [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 2,071 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember | 1,013 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember
Acceptable Risk [Member] | Commercial Loan [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 41,197 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember | 41,474 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember
Acceptable Risk [Member] | Government [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 26,134 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember | 21,587 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = nwin_AcceptableRiskMember
Pass [Member] | Commercial Real Estate [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 29,678 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 33,153 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass [Member] | Commercial Participations Purchased [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 115 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 260 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass [Member] | Commercial Loan [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 10,893 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 11,173 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass [Member] | Government [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Special Mention [Member] | Commercial Real Estate [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 4,649 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 3,348 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention [Member] | Commercial Participations Purchased [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention [Member] | Commercial Loan [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 1,343 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 88 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention [Member] | Government [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Substandard [Member] | Commercial Real Estate [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 6,412 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 8,545 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard [Member] | Commercial Participations Purchased [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 103 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard [Member] | Commercial Loan [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 329 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 702 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard [Member] | Government [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Doubtful [Member] | Commercial Real Estate [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember
Doubtful [Member] | Commercial Participations Purchased [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember
Doubtful [Member] | Commercial Loan [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember | 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember
Doubtful [Member] | Government [Member] | Corporate Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember | 0 us-gaap_NotesReceivableNet / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember / nwin_CreditExposureAxis = nwin_CorporateCreditExposureMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_DoubtfulMember
Performing Financing Receivable [Member] | Residential Real Estate [Member] | Consumer Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 185,996 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember | 158,963 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Performing Financing Receivable [Member] | Consumer Loan [Member] | Consumer Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 357 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember | 232 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Nonperforming Financing Receivable [Member] | Residential Real Estate [Member] | Consumer Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | 3,533 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_NonperformingFinancingReceivableMember | 2,701 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ResidentialRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_NonperformingFinancingReceivableMember
Nonperforming Financing Receivable [Member] | Consumer Loan [Member] | Consumer Credit Exposure [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Financing Receivable | $ 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_NonperformingFinancingReceivableMember | $ 0 us-gaap_NotesReceivableNet / nwin_CreditExposureAxis = nwin_ConsumerCreditExposureMember / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_NonperformingFinancingReceivableMember

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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 + Details
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