Quarterly report pursuant to Section 13 or 15(d)

Loans Receivable (Details 1)

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