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This item represents loans held-for-sale as presented on the statement of financial position which may include mortgage loans held-for-sale, finance receivables held-for-sale, or any other loans classified as held-for-sale which are due the Company as of the balance sheet date.No definition available.false2Loans held for sale (at fair value)27false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3079900030799000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse3597400035974000USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure28false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse12false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsRecurringMember_FairValueByFairValueHierarchyLevelAxis_EstimateOfFairValueFairValueDisclosureMemberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Recurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsRecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseEstimate Of Fair Value, Fair Value Disclosure [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EstimateOfFairValueFairValueDisclosureMemberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Recurring [Member] | Estimate Of Fair Value, Fair Value Disclosure [Member]29true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]30false 4us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse114076000114076000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse119056000119056000USD$falsefalsefalse4truefalsefalse3541700035417000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents securitized, pay-through debt securities collateralized by real estate mortgage loans (mortgages) as of the balance sheet date which have been categorized as available-for-sale.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 15 -IssueDate 2006-05-01 -Chapter 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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The element may be used in both the balance sheet and disclosure in the same submission. This item represents collateralized mortgage obligations on government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Collateralized mortgage obligations, Government sponsored enterprise bonds32false 4wsbf_Private-LabelIssuedCollateralizedMortgageObligationsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse1845100018451000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. 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The element may be used in both the balance sheet and disclosure in the same submission. This item represents government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Government sponsored enterprise bonds34false 4wsbf_MunicipalSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5872900058729000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse3737100037371000USD$falsefalsefalse4truefalsefalse3906800039068000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents municipal securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Municipal securities35false 4wsbf_OtherDebtSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse51360005136000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse50700005070000USD$falsefalsefalse4truefalsefalse51180005118000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents other debt securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Other debt securities36false 4wsbf_CertificatesOfDepositAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse64170006417000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse59240005924000USD$falsefalsefalse4truefalsefalse39200003920000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. 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This item represents loans held-for-sale as presented on the statement of financial position which may include mortgage loans held-for-sale, finance receivables held-for-sale, or any other loans classified as held-for-sale which are due the Company as of the balance sheet date.No definition available.false2Loans held for sale (at fair value)38false 4wsbf_MortgageBankingDerivativeAssetswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse23640002364000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse16680001668000USD$falsefalsefalse4truefalsefalse924000924000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all assets resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivative Assets39false 4wsbf_MortgageBankingDerivativesLiabilitieswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse124000124000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse249000249000USD$falsefalsefalse4truefalsefalse397000397000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all liabilities resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivatives Liabilities40false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse4007100040071000USD$falsefalsefalse4truefalsefalse4343200043432000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure41false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse3597400035974000USD$falsefalsefalse4truefalsefalse5667000056670000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure42false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse15false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsRecurringMember_FairValueByFairValueHierarchyLevelAxis_FairValueInputsLevel1Memberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Recurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsRecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseFair Value, Inputs, Level 1 [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]43true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]44false 4us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents securitized, pay-through debt securities collateralized by real estate mortgage loans (mortgages) as of the balance sheet date which have been categorized as available-for-sale.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 15 -IssueDate 2006-05-01 -Chapter 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Mortgage-Backed Securities -URI http://asc.fasb.org/extlink&oid=6517959 false2Mortgage-backed securities45false 4wsbf_CollateralizedMortgageObligationsGovernmentSponsoredEnterpriseBondsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents collateralized mortgage obligations on government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Collateralized mortgage obligations, Government sponsored enterprise bonds46false 4wsbf_GovernmentSponsoredEnterpriseBondsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Government sponsored enterprise bonds47false 4wsbf_MunicipalSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents municipal securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Municipal securities48false 4wsbf_OtherDebtSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse51360005136000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse50700005070000USD$falsefalsefalse4truefalsefalse51180005118000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents other debt securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Other debt securities49false 4wsbf_CertificatesOfDepositAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents certificates of deposit as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Certificates of deposit50false 4us-gaap_LoansHeldForSaleFairValueDisclosureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loans held-for-sale as presented on the statement of financial position which may include mortgage loans held-for-sale, finance receivables held-for-sale, or any other loans classified as held-for-sale which are due the Company as of the balance sheet date.No definition available.false2Loans held for sale (at fair value)51false 4wsbf_MortgageBankingDerivativeAssetswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all assets resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivative Assets52false 4wsbf_MortgageBankingDerivativesLiabilitieswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all liabilities resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivatives Liabilities53false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure54false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure55false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse18false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsRecurringMember_FairValueByFairValueHierarchyLevelAxis_FairValueInputsLevel2Memberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Recurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsRecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseFair Value, Inputs, Level 2 [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]56true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]57false 4us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse114076000114076000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse119056000119056000USD$falsefalsefalse4truefalsefalse3541700035417000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents securitized, pay-through debt securities collateralized by real estate mortgage loans (mortgages) as of the balance sheet date which have been categorized as available-for-sale.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 15 -IssueDate 2006-05-01 -Chapter 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Mortgage-Backed Securities -URI http://asc.fasb.org/extlink&oid=6517959 false2Mortgage-backed securities58false 4wsbf_CollateralizedMortgageObligationsGovernmentSponsoredEnterpriseBondsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2609200026092000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2957900029579000USD$falsefalsefalse4truefalsefalse3319600033196000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents collateralized mortgage obligations on government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Collateralized mortgage obligations, Government sponsored enterprise bonds59false 4wsbf_GovernmentSponsoredEnterpriseBondsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1002100010021000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse80170008017000USD$falsefalsefalse4truefalsefalse7134900071349000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Government sponsored enterprise bonds60false 4wsbf_MunicipalSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5872900058729000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse3737100037371000USD$falsefalsefalse4truefalsefalse3906800039068000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents municipal securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Municipal securities61false 4wsbf_OtherDebtSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents other debt securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Other debt securities62false 4wsbf_CertificatesOfDepositAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse64170006417000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse59240005924000USD$falsefalsefalse4truefalsefalse39200003920000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents certificates of deposit as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Certificates of deposit63false 4us-gaap_LoansHeldForSaleFairValueDisclosureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse104168000104168000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse133613000133613000USD$falsefalsefalse4truefalsefalse8828300088283000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loans held-for-sale as presented on the statement of financial position which may include mortgage loans held-for-sale, finance receivables held-for-sale, or any other loans classified as held-for-sale which are due the Company as of the balance sheet date.No definition available.false2Loans held for sale (at fair value)64false 4wsbf_MortgageBankingDerivativeAssetswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all assets resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivative Assets65false 4wsbf_MortgageBankingDerivativesLiabilitieswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all liabilities resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivatives Liabilities66false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure67false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4truefalsefalse00USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure68false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse21false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsRecurringMember_FairValueByFairValueHierarchyLevelAxis_FairValueInputsLevel3Memberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Recurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsRecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseFair Value, Inputs, Level 3 [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]69true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]70false 4us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents securitized, pay-through debt securities collateralized by real estate mortgage loans (mortgages) as of the balance sheet date which have been categorized as available-for-sale.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 15 -IssueDate 2006-05-01 -Chapter 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Mortgage-Backed Securities -URI http://asc.fasb.org/extlink&oid=6517959 false2Mortgage-backed securities71false 4wsbf_CollateralizedMortgageObligationsGovernmentSponsoredEnterpriseBondsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents collateralized mortgage obligations on government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Collateralized mortgage obligations, Government sponsored enterprise bonds72false 4wsbf_Private-LabelIssuedCollateralizedMortgageObligationsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse1845100018451000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents private-label issued collateralized mortgage obligations as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Collateralized Mortgage Obligations, Private-label issued73false 4wsbf_GovernmentSponsoredEnterpriseBondsAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents government sponsored enterprise bonds as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Government sponsored enterprise bonds74false 4wsbf_MunicipalSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents municipal securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Municipal securities75false 4wsbf_OtherDebtSecuritiesAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents other debt securities as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Other debt securities76false 4wsbf_CertificatesOfDepositAvailable-For-SaleFairValueDisclosurewsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents certificates of deposit as of the balance sheet date which have been categorized as available-for-sale.No definition available.false2Certificates of deposit77false 4us-gaap_LoansHeldForSaleFairValueDisclosureus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents loans held-for-sale as presented on the statement of financial position which may include mortgage loans held-for-sale, finance receivables held-for-sale, or any other loans classified as held-for-sale which are due the Company as of the balance sheet date.No definition available.false2Loans held for sale (at fair value)78false 4wsbf_MortgageBankingDerivativeAssetswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse23640002364000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse16680001668000USD$falsefalsefalse4truefalsefalse924000924000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all assets resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivative Assets79false 4wsbf_MortgageBankingDerivativesLiabilitieswsbf_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse124000124000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse249000249000USD$falsefalsefalse4truefalsefalse397000397000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryFair values as of the balance sheet date of all liabilities resulting from mortgage banking contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.No definition available.false2Mortgage Banking Derivatives Liabilities80false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse4007100040071000USD$falsefalsefalse4truefalsefalse4343200043432000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure81false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse3597400035974000USD$falsefalsefalse4truefalsefalse5667000056670000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure82false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse24false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsNonrecurringMember_FairValueByFairValueHierarchyLevelAxis_EstimateOfFairValueFairValueDisclosureMemberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Nonrecurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsNonrecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseEstimate Of Fair Value, Fair Value Disclosure [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_EstimateOfFairValueFairValueDisclosureMemberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Nonrecurring [Member] | Estimate Of Fair Value, Fair Value Disclosure [Member]83true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]84false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3580300035803000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse4007100040071000USD$falsefalsefalse4truefalsefalse4343200043432000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure85false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3079900030799000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse3597400035974000USD$falsefalsefalse4truefalsefalse5667000056670000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure86false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse27false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsNonrecurringMember_FairValueByFairValueHierarchyLevelAxis_FairValueInputsLevel1Memberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Nonrecurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsNonrecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseFair Value, Inputs, Level 1 [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel1Memberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]87true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]88false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure89false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure90false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse29false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsNonrecurringMember_FairValueByFairValueHierarchyLevelAxis_FairValueInputsLevel2Memberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Nonrecurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsNonrecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseFair Value, Inputs, Level 2 [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel2Memberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]91true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]92false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure93false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse00USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value Disclosure94false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse31false USDtruefalse$Context_As_Of_31-Mar-2013_FairValueByMeasurementFrequencyAxis_FairValueMeasurementsNonrecurringMember_FairValueByFairValueHierarchyLevelAxis_FairValueInputsLevel3Memberhttp://www.sec.gov/CIK0001569994instant2013-03-31T00:00:000001-01-01T00:00:00falsefalseFair Value, Measurements, Nonrecurring [Member]us-gaap_FairValueByMeasurementFrequencyAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueMeasurementsNonrecurringMemberus-gaap_FairValueByMeasurementFrequencyAxisexplicitMemberfalsefalseFair Value, Inputs, Level 3 [Member]us-gaap_FairValueByFairValueHierarchyLevelAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FairValueInputsLevel3Memberus-gaap_FairValueByFairValueHierarchyLevelAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]95true 3us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]96false 4wsbf_ImpairedLoansFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3580300035803000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse4007100040071000USD$falsefalsefalse4truefalsefalse4343200043432000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans receivable as presented on the statement of financial position which may include mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts, or any other loans which are due the Company as of the balance sheet date.No definition available.false2Impaired Loans, Fair Value Disclosure97false 4wsbf_RealEstateOwnedFairValueDisclosurewsbf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3079900030799000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse3597400035974000USD$falsetruefalse4truefalsefalse5667000056670000USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe fair value of real estate owned.No definition available.false2Real Estate Owned, Fair Value DisclosurefalseFair Value Measurements (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://wsbonline.com/role/FairValueMeasurementsDetails497