Quarterly report pursuant to Section 13 or 15(d)

Foreclosed Real Estate (Details)

v2.4.1.9
Foreclosed Real Estate (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Real Estate Properties [Line Items]    
Foreclosed real estate $ 1,821us-gaap_ForeclosedAssets $ 1,745us-gaap_ForeclosedAssets
Residential Real Estate Including Home Equity [Member]    
Real Estate Properties [Line Items]    
Foreclosed real estate 308us-gaap_ForeclosedAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
324us-gaap_ForeclosedAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= nwin_ResidentialRealEstateIncludingHomeEquityMember
Commercial Real Estate [Member]    
Real Estate Properties [Line Items]    
Foreclosed real estate 1,314us-gaap_ForeclosedAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CommercialRealEstateMember
1,218us-gaap_ForeclosedAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CommercialRealEstateMember
Commercial Business [Member]    
Real Estate Properties [Line Items]    
Foreclosed real estate $ 199us-gaap_ForeclosedAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CommercialLoanMember
$ 203us-gaap_ForeclosedAssets
/ us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis
= us-gaap_CommercialLoanMember