Annual report pursuant to Section 13 and 15(d)

Loans Receivable (Details)

v2.4.1.9
Loans Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Loans secured by real estate:    
Total loans secured by real estate $ 403,194us-gaap_MortgageLoansOnRealEstate $ 358,628us-gaap_MortgageLoansOnRealEstate
Consumer loans 358us-gaap_LoansAndLeasesReceivableConsumer 237us-gaap_LoansAndLeasesReceivableConsumer
Commercial business 58,790us-gaap_LoansAndLeasesReceivableCommercial 57,716us-gaap_LoansAndLeasesReceivableCommercial
Government loans 26,134us-gaap_LoansAndLeasesReceivableOther 21,587us-gaap_LoansAndLeasesReceivableOther
Subtotal 488,476us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome 438,168us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Less: Net deferred loan origination fees (197)us-gaap_LoansAndLeasesReceivableDeferredIncome (252)us-gaap_LoansAndLeasesReceivableDeferredIncome
Less: Undisbursed loan funds (126)us-gaap_LoansAndLeasesReceivableLoansInProcess (95)us-gaap_LoansAndLeasesReceivableLoansInProcess
Loan receivables 488,153us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 437,821us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Residential Including Home Equity [Member]    
Loans secured by real estate:    
Total loans secured by real estate 189,743us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
161,932us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Loan receivables 189,529us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
161,664us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Commercial Real Estate, Construction & Land Development, and Other Dwellings [Member]    
Loans secured by real estate:    
Total loans secured by real estate 211,162us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
195,423us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Loan receivables 211,162us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
195,349us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Commercial Participations Purchased [Member]    
Loans secured by real estate:    
Total loans secured by real estate 2,289us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
1,273us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Loan receivables $ 2,289us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
$ 1,273us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember