Quarterly report pursuant to Section 13 or 15(d)

Loans Receivable (Details)

v2.4.1.9
Loans Receivable (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Loans secured by real estate:    
Total loans secured by real estate $ 401,459us-gaap_MortgageLoansOnRealEstate $ 403,194us-gaap_MortgageLoansOnRealEstate
Consumer loans 348us-gaap_LoansAndLeasesReceivableConsumer 358us-gaap_LoansAndLeasesReceivableConsumer
Commercial business 60,954us-gaap_LoansAndLeasesReceivableCommercial 58,790us-gaap_LoansAndLeasesReceivableCommercial
Government loans 28,045us-gaap_LoansAndLeasesReceivableOther 26,134us-gaap_LoansAndLeasesReceivableOther
Subtotal 490,806us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome 488,476us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Less: Net deferred loan origination fees (198)us-gaap_LoansAndLeasesReceivableDeferredIncome (197)us-gaap_LoansAndLeasesReceivableDeferredIncome
Less: Undisbursed loan funds (71)us-gaap_LoansAndLeasesReceivableLoansInProcess (126)us-gaap_LoansAndLeasesReceivableLoansInProcess
Loan receivables 490,537us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 488,153us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Residential Including Home Equity [Member]    
Loans secured by real estate:    
Total loans secured by real estate 185,576us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
189,743us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Loan receivables 185,363us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
189,529us-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 213,688us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
211,162us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Loan receivables 213,688us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
211,162us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Commercial Participations Purchased [Member]    
Loans secured by real estate:    
Total loans secured by real estate 2,195us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
2,289us-gaap_MortgageLoansOnRealEstate
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Loan receivables $ 2,195us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
$ 2,289us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember