XML 105 R51.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Loans Receivable (Details 3) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Residential Real Estate Including Home Equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | $ 685 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | $ 887 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Unpaid Principal Balance | 1,258 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 899 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Related Allowance | 15 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 16 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Average Recorded Investment | 703 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 920 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Interest Income Recognized | 6 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 9 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 6,240 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 8,446 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Unpaid Principal Balance | 7,476 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 8,446 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Related Allowance | 366 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 1,657 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Average Recorded Investment | 6,616 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 9,668 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Interest Income Recognized | 215 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 83 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Commercial Participations Purchased [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 103 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 0 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Unpaid Principal Balance | 103 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 0 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Related Allowance | 11 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Average Recorded Investment | 103 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Interest Income Recognized | 1 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Commercial Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 328 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 534 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Unpaid Principal Balance | 596 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 802 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Related Allowance | 34 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 30 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Average Recorded Investment | 333 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 1,122 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Interest Income Recognized | 1 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 2 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Impaired Loans With No Related Allowance [Member] | Residential Real Estate Including Home Equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Related Allowance | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Average Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Interest Income Recognized | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Impaired Loans With No Related Allowance [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 524 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 617 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Unpaid Principal Balance | 524 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 617 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Related Allowance | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Average Recorded Investment | 527 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 898 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Interest Income Recognized | 22 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 9 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Impaired Loans With No Related Allowance [Member] | Commercial Participations Purchased [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Related Allowance | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Average Recorded Investment | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Interest Income Recognized | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Impaired Loans With No Related Allowance [Member] | Commercial Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 25 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 228 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Unpaid Principal Balance | 25 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 228 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Related Allowance | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Average Recorded Investment | 25 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 668 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Interest Income Recognized | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 1 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Impaired Loans With Related Allowance [Member] | Residential Real Estate Including Home Equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 685 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 887 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 1,258 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 899 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 15 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 16 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 703 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 920 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Interest Income Recognized | 6 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 9 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Impaired Loans With Related Allowance [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 5,716 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 7,829 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 6,952 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 7,829 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 366 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 1,657 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 6,089 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 8,770 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Interest Income Recognized | 193 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 74 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Impaired Loans With Related Allowance [Member] | Commercial Participations Purchased [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 103 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 103 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 11 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 103 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Interest Income Recognized | 1 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Impaired Loans With Related Allowance [Member] | Commercial Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 303 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 306 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 571 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 574 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 34 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 30 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 308 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 454 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Interest Income Recognized | $ 1 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | $ 1 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
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- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5212-111524 + Details
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