Annual report pursuant to Section 13 and 15(d)

Loans Receivable (Details 4)

v2.4.1.9
Loans Receivable (Details 4) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due $ 5,599us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue $ 5,837us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
60-89 Days Past Due 2,959us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue 3,741us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Greater Than 90 Days Past Due 4,703us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue 2,717us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Total Past Due 13,261us-gaap_FinancingReceivableRecordedInvestmentPastDue 12,295us-gaap_FinancingReceivableRecordedInvestmentPastDue
Current 474,892us-gaap_FinancingReceivableRecordedInvestmentCurrent 425,526us-gaap_FinancingReceivableRecordedInvestmentCurrent
Total Loans 488,153us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 437,821us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Recorded Investments Greater than 90 Days and Accruing 941us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing 174us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Residential Real Estate Including Home Equity [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
30-59 Days Past Due 4,405us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
3,721us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
60-89 Days Past Due 2,693us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
1,090us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Greater Than 90 Days Past Due 2,579us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
1,502us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Total Past Due 9,677us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
6,313us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Current 179,852us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
155,351us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Total Loans 189,529us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
161,664us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Recorded Investments Greater than 90 Days and Accruing 941us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
174us-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
1us-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
1us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Current 357us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
231us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Total Loans 357us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
232us-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 855us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
1,083us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
60-89 Days Past Due 190us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
2,626us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Greater Than 90 Days Past Due 1,783us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
768us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Total Past Due 2,828us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
4,477us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Current 208,334us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
190,872us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Total Loans 211,162us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
195,349us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Recorded Investments Greater than 90 Days and Accruing 0us-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 103us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
0us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Total Past Due 103us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
0us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Current 2,186us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
1,273us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Total Loans 2,289us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
1,273us-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 339us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
1,032us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
60-89 Days Past Due 76us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
25us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Greater Than 90 Days Past Due 238us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
447us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Total Past Due 653us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
1,504us-gaap_FinancingReceivableRecordedInvestmentPastDue
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Current 58,029us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
56,212us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Total Loans 58,682us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
57,716us-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 26,134us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
21,587us-gaap_FinancingReceivableRecordedInvestmentCurrent
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
Total Loans 26,134us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
21,587us-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