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This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Loans receivable, net4false 4wsbf_PercentageOfLoansSecuredByResidentialRealEstatewsbf_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.8850.885falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.8920.892falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsenum:percentItemTypepurePercentage of loans secured by residential real estate.No definition available.false0Percentage of total loans receivable secured by residential real estate (in hundredths)5false 4wsbf_MortgageLoansReceivableLocatedOutsideStateOfWisconsinwsbf_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse7900000079000000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse8110000081100000USD$falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of mortgage loans receivable that are located outside of the state of Wisconsin.No definition available.false2Mortgage loans receivable located outside the state of Wisconsin6false 4wsbf_PercentageOfTotalMortgageLoansLocatedOutsideOfStateOfWisconsinwsbf_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.070.07falsefalsefalse2falsefalsefalse00falsefalsefalse3truetruefalse0.0720.072falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsenum:percentItemTypepureRepresents the percentage of total mortgage loans located outside of the state of Wisconsin.No definition available.false0Percentage of total mortgage loans located outside of the state of Wisconsin (in hundredths)7false 4us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSaleus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse430108000430108000USD$falsefalsefalse2truefalsefalse326882000326882000USD$falsefalsefalse3truefalsefalse17494260001749426000USD$falsefalsefalse4truefalsefalse10273460001027346000USD$falsefalsefalse5truefalsefalse10843620001084362000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe aggregate amount of cash outflow for loans purchased and created with the intention to resell them in the near future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 3, 15, 16, 17, 22, 23, 147, 148, 149 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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