Annual report pursuant to Section 13 and 15(d)

Loans Receivable (Details 2)

v2.4.1.9
Loans Receivable (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Commercial Real Estate [Member] | Corporate Credit Exposure [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Financing Receivable $ 211,162us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		$ 195,349us-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 2,289us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		1,273us-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 58,682us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		57,716us-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 189,529us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_ConsumerCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialRealEstateMember 		161,664us-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 357us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_ConsumerCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		232us-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 26,134us-gaap_NotesReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember 		21,587us-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 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_ModestRiskMember 		0us-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 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_ModestRiskMember 		0us-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 4,920us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_ModestRiskMember 		4,279us-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 0us-gaap_NotesReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_ModestRiskMember 		0us-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 170,423us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_AcceptableRiskMember 		150,303us-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 2,071us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_AcceptableRiskMember 		1,013us-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 41,197us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_AcceptableRiskMember 		41,474us-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 26,134us-gaap_NotesReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_InternalCreditAssessmentAxis
= nwin_AcceptableRiskMember 		21,587us-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 29,678us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember 		33,153us-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 115us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember 		260us-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 10,893us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember 		11,173us-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 0us-gaap_NotesReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember 		0us-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 4,649us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember 		3,348us-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 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember 		0us-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 1,343us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember 		88us-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 0us-gaap_NotesReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember 		0us-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 6,412us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember 		8,545us-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 103us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember 		0us-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 329us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember 		702us-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 0us-gaap_NotesReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember 		0us-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 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember 		0us-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 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember 		0us-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 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember 		0us-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 0us-gaap_NotesReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
/ nwin_CreditExposureAxis
= nwin_CorporateCreditExposureMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_DoubtfulMember 		0us-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 185,996us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_ConsumerCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PerformingFinancingReceivableMember 		158,963us-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 357us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_ConsumerCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PerformingFinancingReceivableMember 		232us-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 3,533us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_ConsumerCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ResidentialRealEstateMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_NonperformingFinancingReceivableMember 		2,701us-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 $ 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_ConsumerCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_NonperformingFinancingReceivableMember 		$ 0us-gaap_NotesReceivableNet
/ nwin_CreditExposureAxis
= nwin_ConsumerCreditExposureMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_NonperformingFinancingReceivableMember