Loans Receivable (Details 4) (USD $) In Thousands, unless otherwise specified
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Mar. 31, 2015
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Dec. 31, 2014
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Financing Receivable, Recorded Investment, Past Due [Line Items] |
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30-59 Days Past Due |
$ 5,233us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
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$ 5,599us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
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60-89 Days Past Due |
1,999us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
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2,959us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
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Greater Than 90 Days Past Due |
2,828us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
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4,703us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
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Total Past Due |
10,060us-gaap_FinancingReceivableRecordedInvestmentPastDue
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13,261us-gaap_FinancingReceivableRecordedInvestmentPastDue
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Current |
480,477us-gaap_FinancingReceivableRecordedInvestmentCurrent
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474,892us-gaap_FinancingReceivableRecordedInvestmentCurrent
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Total Loans |
490,537us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
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488,153us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
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Recorded Investments Greater than 90 Days and Accruing |
293us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
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941us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
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Residential Real Estate Including Home Equity [Member] |
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Financing Receivable, Recorded Investment, Past Due [Line Items] |
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30-59 Days Past Due |
3,682us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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4,405us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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60-89 Days Past Due |
1,919us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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2,693us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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Greater Than 90 Days Past Due |
1,763us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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2,579us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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Total Past Due |
7,364us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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9,677us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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Current |
177,999us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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179,852us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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Total Loans |
185,363us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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189,529us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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Recorded Investments Greater than 90 Days and Accruing |
135us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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941us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
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Consumer Loan [Member] |
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Financing Receivable, Recorded Investment, Past Due [Line Items] |
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30-59 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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60-89 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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Greater Than 90 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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Total Past Due |
0us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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0us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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Current |
346us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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357us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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Total Loans |
346us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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357us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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Recorded Investments Greater than 90 Days and Accruing |
0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
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Commercial Real Estate [Member] |
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Financing Receivable, Recorded Investment, Past Due [Line Items] |
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30-59 Days Past Due |
700us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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855us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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60-89 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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190us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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Greater Than 90 Days Past Due |
736us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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1,783us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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Total Past Due |
1,436us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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2,828us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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Current |
212,252us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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208,334us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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Total Loans |
213,688us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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211,162us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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Recorded Investments Greater than 90 Days and Accruing |
158us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
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Commercial Participations Purchased [Member] |
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Financing Receivable, Recorded Investment, Past Due [Line Items] |
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30-59 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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60-89 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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Greater Than 90 Days Past Due |
100us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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103us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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Total Past Due |
100us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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103us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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Current |
2,095us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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2,186us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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Total Loans |
2,195us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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2,289us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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Recorded Investments Greater than 90 Days and Accruing |
0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
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Commercial Loan [Member] |
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Financing Receivable, Recorded Investment, Past Due [Line Items] |
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30-59 Days Past Due |
851us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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339us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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60-89 Days Past Due |
80us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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76us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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Greater Than 90 Days Past Due |
229us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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238us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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Total Past Due |
1,160us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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653us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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Current |
59,740us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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58,029us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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Total Loans |
60,900us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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58,682us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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Recorded Investments Greater than 90 Days and Accruing |
0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
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Government [Member] |
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Financing Receivable, Recorded Investment, Past Due [Line Items] |
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30-59 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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60-89 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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Greater Than 90 Days Past Due |
0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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Total Past Due |
0us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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0us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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Current |
28,045us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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26,134us-gaap_FinancingReceivableRecordedInvestmentCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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Total Loans |
28,045us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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26,134us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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Recorded Investments Greater than 90 Days and Accruing |
$ 0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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$ 0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
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