XML 52 R36.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Loans Receivable (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Residential Real Estate Including Home Equity [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Investment | $ 1,265 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | $ 685 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Unpaid Principal Balance | 2,269 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 1,258 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Related Allowance | 27 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 15 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Average Recorded Investment | 1,270 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 778 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |
Interest Income Recognized | 8 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 | 5,161 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 6,240 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Unpaid Principal Balance | 5,161 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 7,476 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Related Allowance | 363 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 366 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Average Recorded Investment | 5,184 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 8,393 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |
Interest Income Recognized | 47 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 | 100 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 103 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Unpaid Principal Balance | 100 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 103 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Related Allowance | 8 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 11 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Average Recorded Investment | 102 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |
Interest Income Recognized | 2 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 | 315 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 328 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Unpaid Principal Balance | 583 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 596 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Related Allowance | 89 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 34 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Average Recorded Investment | 321 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 531 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 | 70 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember |  | 524 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Unpaid Principal Balance | 70 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember |  | 524 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 | 70 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 593 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember |
Interest Income Recognized | 0 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 | 0 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember |  | 25 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember
Unpaid Principal Balance | 0 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember |  | 25 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 | 0 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithNoRelatedAllowanceMember | 270 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 | 2 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 | 1,265 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 685 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 2,269 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 1,258 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 27 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 15 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 1,270 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 778 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |
Interest Income Recognized | 8 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 | 5,091 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 5,716 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 5,091 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 6,952 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 363 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 366 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 5,114 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 7,800 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |
Interest Income Recognized | 47 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 | 100 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 103 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 100 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 103 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 8 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 11 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 102 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 | 2 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 | 315 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 303 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Unpaid Principal Balance | 583 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 571 us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Related Allowance | 89 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |  | 34 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember
Average Recorded Investment | 321 us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember | 261 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 | $ 0 us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = nwin_ImpairedLoansWithRelatedAllowanceMember |

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