Quarterly report pursuant to Section 13 or 15(d)

Loans Receivable (Details 4)

v2.4.1.9
Loans Receivable (Details 4) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due $ 5,233us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue $ 5,599us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
60-89 Days Past Due 1,999us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue 2,959us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Greater Than 90 Days Past Due 2,828us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue 4,703us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Total Past Due 10,060us-gaap_FinancingReceivableRecordedInvestmentPastDue 13,261us-gaap_FinancingReceivableRecordedInvestmentPastDue
Current 480,477us-gaap_FinancingReceivableRecordedInvestmentCurrent 474,892us-gaap_FinancingReceivableRecordedInvestmentCurrent
Total Loans 490,537us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 488,153us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Recorded Investments Greater than 90 Days and Accruing 293us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing 941us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Residential Real Estate Including Home Equity [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 3,682us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
4,405us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
60-89 Days Past Due 1,919us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
2,693us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Greater Than 90 Days Past Due 1,763us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
2,579us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Total Past Due 7,364us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
9,677us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Current 177,999us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
179,852us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Total Loans 185,363us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
189,529us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Recorded Investments Greater than 90 Days and Accruing 135us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
941us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Consumer Loan [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
60-89 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Greater Than 90 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Total Past Due 0us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
0us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Current 346us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
357us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Total Loans 346us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
357us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Recorded Investments Greater than 90 Days and Accruing 0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Commercial Real Estate [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 700us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
855us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
60-89 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
190us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Greater Than 90 Days Past Due 736us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
1,783us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Total Past Due 1,436us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
2,828us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Current 212,252us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
208,334us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Total Loans 213,688us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
211,162us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Recorded Investments Greater than 90 Days and Accruing 158us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Commercial Participations Purchased [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
60-89 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Greater Than 90 Days Past Due 100us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
103us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Total Past Due 100us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
103us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Current 2,095us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
2,186us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Total Loans 2,195us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
2,289us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Recorded Investments Greater than 90 Days and Accruing 0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Commercial Loan [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 851us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
339us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
60-89 Days Past Due 80us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
76us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Greater Than 90 Days Past Due 229us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
238us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Total Past Due 1,160us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
653us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Current 59,740us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
58,029us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Total Loans 60,900us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
58,682us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Recorded Investments Greater than 90 Days and Accruing 0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Government [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
0us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
60-89 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
0us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
Greater Than 90 Days Past Due 0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
Total Past Due 0us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
0us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
Current 28,045us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
26,134us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
Total Loans 28,045us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
26,134us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
Recorded Investments Greater than 90 Days and Accruing $ 0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
$ 0us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember