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v2.4.1.9

Loans Receivable (Details 1) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Allowance for loan losses: |  |  |
Beginning Balance | $ 6,361 us-gaap_LoansAndLeasesReceivableAllowance | $ 7,189 us-gaap_LoansAndLeasesReceivableAllowance |
Charge-offs | (87)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs | (9)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs |
Recoveries | 25 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts | 18 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts |
Provisions | 287 us-gaap_ProvisionForLoanAndLeaseLosses | 245 us-gaap_ProvisionForLoanAndLeaseLosses |
Ending Balance | 6,586 us-gaap_LoansAndLeasesReceivableAllowance | 7,443 us-gaap_LoansAndLeasesReceivableAllowance |
Ending balance: individually evaluated for impairment | 487 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 |  | 426 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Ending balance: collectively evaluated for impairment | 6,099 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment |  | 5,935 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
LOAN RECEIVABLES |  |  |
Ending balance | 490,537 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount |  | 488,153 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Ending balance: individually evaluated for impairment | 5,912 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment |  | 6,768 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Ending balance: purchased credit impaired individually evaluated for impairment | 929 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment |  | 588 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment
Ending balance: collectively evaluated for impairment | 483,696 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment |  | 480,797 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Residential Real Estate Including Home Equity [Member] |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 1,878 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 1,444 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |
Charge-offs | (28)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | (2)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |
Recoveries | 22 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 2 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |
Provisions | 93 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 4 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |
Ending Balance | 1,965 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember | 1,448 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |
Ending balance: individually evaluated for impairment | 27 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 15 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: collectively evaluated for impairment | 1,938 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 1,863 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
LOAN RECEIVABLES |  |  |
Ending balance | 185,363 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 189,529 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: individually evaluated for impairment | 336 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 97 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: purchased credit impaired individually evaluated for impairment | 929 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 588 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: collectively evaluated for impairment | 184,098 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember |  | 188,844 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_ResidentialRealEstateIncludingHomeEquityMember
Consumer Loan [Member] |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 17 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember | 12 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |
Charge-offs | (5)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember | (7)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |
Recoveries | 0 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember | 1 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |
Provisions | 9 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember | 11 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |
Ending Balance | 21 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember | 17 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |
Ending balance: individually evaluated for impairment | 0 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |  | 0 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
Ending balance: collectively evaluated for impairment | 21 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |  | 17 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
LOAN RECEIVABLES |  |  |
Ending balance | 346 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |  | 357 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
Ending balance: individually evaluated for impairment | 0 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |  | 0 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
Ending balance: purchased credit impaired individually evaluated for impairment | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |  | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
Ending balance: collectively evaluated for impairment | 346 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember |  | 357 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember
Commercial Real Estate [Member] |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 3,645 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 4,789 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |
Charge-offs | (54)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 0 us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |
Recoveries | 1 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 11 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |
Provisions | 102 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 169 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |
Ending Balance | 3,694 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember | 4,969 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |
Ending balance: individually evaluated for impairment | 363 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 366 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Ending balance: collectively evaluated for impairment | 3,331 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 3,279 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
LOAN RECEIVABLES |  |  |
Ending balance | 213,688 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 211,162 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Ending balance: individually evaluated for impairment | 5,161 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 6,240 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Ending balance: purchased credit impaired individually evaluated for impairment | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Ending balance: collectively evaluated for impairment | 208,527 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember |  | 204,922 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialRealEstateMember
Commercial Participations Purchased [Member] |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 13 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 31 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |
Charge-offs | 0 us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 0 us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |
Recoveries | 0 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 2 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |
Provisions | (3)us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 8 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |
Ending Balance | 10 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember | 41 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |
Ending balance: individually evaluated for impairment | 8 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 11 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Ending balance: collectively evaluated for impairment | 2 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 2 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
LOAN RECEIVABLES |  |  |
Ending balance | 2,195 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 2,289 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Ending balance: individually evaluated for impairment | 100 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 103 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Ending balance: purchased credit impaired individually evaluated for impairment | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Ending balance: collectively evaluated for impairment | 2,095 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember |  | 2,186 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = nwin_CommercialParticipationsPurchasedMember
Commercial Loan [Member] |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 733 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 859 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |
Charge-offs | 0 us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 0 us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |
Recoveries | 2 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 2 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |
Provisions | 80 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 46 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |
Ending Balance | 815 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember | 907 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |
Ending balance: individually evaluated for impairment | 89 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 34 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Ending balance: collectively evaluated for impairment | 726 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 699 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
LOAN RECEIVABLES |  |  |
Ending balance | 60,900 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 58,682 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Ending balance: individually evaluated for impairment | 315 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 328 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Ending balance: purchased credit impaired individually evaluated for impairment | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Ending balance: collectively evaluated for impairment | 60,585 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember |  | 58,354 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_FinancialInstrumentAxis = us-gaap_CommercialLoanMember
Government [Member] |  |  |
Allowance for loan losses: |  |  |
Beginning Balance | 75 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember | 54 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |
Charge-offs | 0 us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember | 0 us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |
Recoveries | 0 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember | 0 us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |
Provisions | 6 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember | 7 us-gaap_ProvisionForLoanAndLeaseLosses / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |
Ending Balance | 81 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember | 61 us-gaap_LoansAndLeasesReceivableAllowance / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |
Ending balance: individually evaluated for impairment | 0 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |  | 0 us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
Ending balance: collectively evaluated for impairment | 81 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |  | 75 us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
LOAN RECEIVABLES |  |  |
Ending balance | 28,045 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |  | 26,134 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
Ending balance: individually evaluated for impairment | 0 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |  | 0 us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
Ending balance: purchased credit impaired individually evaluated for impairment | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |  | 0 nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember
Ending balance: collectively evaluated for impairment | $ 28,045 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember |  | $ 26,134 us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment / us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis = us-gaap_GovernmentMember

X
- Definition The balance of financing receivables that were purchased credit impaired individually evaluated for impairment. + References No definition available. + Details
Name: | nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment
Namespace Prefix: | nwin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
Name: | us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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