Annual report pursuant to Section 13 and 15(d)

Loans Receivable (Details 1)

v2.4.1.9
Loans Receivable (Details 1) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Allowance for loan losses:    
Beginning Balance $ 7,189us-gaap_LoansAndLeasesReceivableAllowance $ 8,421us-gaap_LoansAndLeasesReceivableAllowance
Charge-offs (1,764)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs (1,857)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
Recoveries 61us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts 175us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Provisions 875us-gaap_ProvisionForLoanAndLeaseLosses 450us-gaap_ProvisionForLoanAndLeaseLosses
Ending Balance 6,361us-gaap_LoansAndLeasesReceivableAllowance 7,189us-gaap_LoansAndLeasesReceivableAllowance
Ending balance: individually evaluated for impairment 426us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 1,703us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Ending balance: collectively evaluated for impairment 5,935us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment 5,486us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
LOAN RECEIVABLES    
Ending balance 488,153us-gaap_LoansAndLeasesReceivableGrossCarryingAmount 437,821us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Ending balance: individually evaluated for impairment 6,768us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment 9,867us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Ending balance: purchased credit impaired individually evaluated for impairment 588nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment  
Ending balance: collectively evaluated for impairment 480,797us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment 427,954us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Residential Real Estate Including Home Equity [Member]    
Allowance for loan losses:    
Beginning Balance 1,444us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		1,024us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Charge-offs (311)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		(153)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Recoveries 20us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		1us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Provisions 725us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		572us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending Balance 1,878us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		1,444us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: individually evaluated for impairment 15us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		16us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: collectively evaluated for impairment 1,863us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		1,428us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
LOAN RECEIVABLES    
Ending balance 189,529us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		161,664us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: individually evaluated for impairment 97us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		887us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Ending balance: purchased credit impaired individually evaluated for impairment 588nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		 
Ending balance: collectively evaluated for impairment 188,844us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember 		160,777us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Consumer Loan [Member]    
Allowance for loan losses:    
Beginning Balance 12us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		19us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Charge-offs (32)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		(17)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Recoveries 1us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		5us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Provisions 36us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		5us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Ending Balance 17us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		12us-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 17us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		12us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
LOAN RECEIVABLES    
Ending balance 357us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		232us-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 		 
Ending balance: collectively evaluated for impairment 357us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember 		232us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Commercial Real Estate [Member]    
Allowance for loan losses:    
Beginning Balance 4,789us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		4,550us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Charge-offs (1,421)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		(788)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Recoveries 17us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		9us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Provisions 260us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		1,018us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Ending Balance 3,645us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		4,789us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Ending balance: individually evaluated for impairment 366us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		1,657us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Ending balance: collectively evaluated for impairment 3,279us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		3,132us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
LOAN RECEIVABLES    
Ending balance 211,162us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		195,349us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Ending balance: individually evaluated for impairment 6,240us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		8,446us-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 		 
Ending balance: collectively evaluated for impairment 204,922us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember 		186,903us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialRealEstateMember
Commercial Participations Purchased [Member]    
Allowance for loan losses:    
Beginning Balance 31us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		1,608us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Charge-offs 0us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		(332)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Recoveries 2us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		137us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Provisions (20)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		(1,382)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Ending Balance 13us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		31us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Ending balance: individually evaluated for impairment 11us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Ending balance: collectively evaluated for impairment 2us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		31us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
LOAN RECEIVABLES    
Ending balance 2,289us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		1,273us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Ending balance: individually evaluated for impairment 103us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		0us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Ending balance: purchased credit impaired individually evaluated for impairment 0nwin_FinancingReceivablePurchasedCreditImpairedIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		 
Ending balance: collectively evaluated for impairment 2,186us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember 		1,273us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= nwin_CommercialParticipationsPurchasedMember
Commercial Loan [Member]    
Allowance for loan losses:    
Beginning Balance 859us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		1,220us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Charge-offs 0us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		(567)us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Recoveries 21us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		23us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Provisions (147)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		183us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Ending Balance 733us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		859us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Ending balance: individually evaluated for impairment 34us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		30us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Ending balance: collectively evaluated for impairment 699us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		829us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
LOAN RECEIVABLES    
Ending balance 58,682us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		57,716us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Ending balance: individually evaluated for impairment 328us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		534us-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 		 
Ending balance: collectively evaluated for impairment 58,354us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember 		57,182us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommercialLoanMember
Government [Member]    
Allowance for loan losses:    
Beginning Balance 54us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember 		0us-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 21us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember 		54us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
Ending Balance 75us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember 		54us-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 75us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember 		54us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember
LOAN RECEIVABLES    
Ending balance 26,134us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember 		21,587us-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 		 
Ending balance: collectively evaluated for impairment $ 26,134us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember 		$ 21,587us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_GovernmentMember