2.4.0.8059 - Disclosure - Deposits (Details)truefalsefalse1false USDfalsefalse$Context_3ME_31-Mar-2013http://www.sec.gov/CIK0001569994duration2013-01-01T00:00:002013-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$Context_3ME_31-Mar-2012http://www.sec.gov/CIK0001569994duration2012-01-01T00:00:002012-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$Context_FYE_31-Dec-2012http://www.sec.gov/CIK0001569994duration2012-01-01T00:00:002012-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$Context_FYE_31-Dec-2011http://www.sec.gov/CIK0001569994duration2011-01-01T00:00:002011-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5false USDfalsefalse$Context_FYE_31-Dec-2010http://www.sec.gov/CIK0001569994duration2010-01-01T00:00:002010-12-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1us-gaap_DepositsAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Deposits [Abstract]2false 2wsbf_TimeDepositsBalancesGreaterThan100000wsbf_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse193600000193600000USD$falsetruefalse4truefalsefalse232800000232800000USD$falsetruefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe aggregate balance amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) greater than $100,000.No definition available.false2Time deposits, greater than $100,0003true 2us-gaap_InterestExpenseDepositsAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Summary of interest expense on deposits [Abstract]4false 3us-gaap_InterestExpenseDemandDepositAccountsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2300023000falsefalsefalse4truefalsefalse3000030000falsefalsefalse5truefalsefalse3700037000falsefalsefalsexbrli:monetaryItemTypemonetaryInterest expense incurred on demand deposit accounts that represent borrowings rather than outstanding drafts.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 6 -Chapter V -Subsection II -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. false2Interest-bearing demand deposits5false 3wsbf_InterestExpenseMoneyMarketAndSavingsDepositswsbf_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse272000272000falsefalsefalse4truefalsefalse369000369000falsefalsefalse5truefalsefalse493000493000falsefalsefalsexbrli:monetaryItemTypemonetaryInterest expense incurred on all money market deposits and savings deposits.No definition available.false2Money market and savings deposits6false 3us-gaap_InterestExpenseTimeDepositsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse91820009182000falsefalsefalse4truefalsefalse1489000014890000falsefalsefalse5truefalsefalse2045900020459000falsefalsefalsexbrli:monetaryItemTypemonetaryThe aggregate interest expense incurred on time deposits, including certificates of deposits, in domestic offices.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 6 -Chapter V -Subsection II -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. false2Time deposits7false 3us-gaap_InterestExpenseDepositsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse14660001466000falsefalsefalse2truefalsefalse32040003204000falsefalsefalse3truefalsefalse94770009477000falsefalsefalse4truefalsefalse1528900015289000falsefalsefalse5truefalsefalse2098900020989000falsefalsefalsexbrli:monetaryItemTypemonetaryAggregate amount of interest expense on all deposits.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.6) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 6 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 6 -Chapter V -Subsection II -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. true2Interest expense on deposits8true 2us-gaap_MaturitiesOfTimeDepositsAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Summary of the contractual maturities of time deposits [Abstract]9false 3us-gaap_TimeDepositMaturitiesNextRollingTwelveMonthsus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse452351000452351000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse454561000454561000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of time deposits maturing in the next rolling twelve months following the latest balance sheet presented. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.No definition available.false2Within one year10false 3us-gaap_TimeDepositMaturitiesRollingYearTwous-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse214086000214086000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse236816000236816000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of time deposits maturing in the second rolling twelve months following the latest balance sheet presented. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.No definition available.false2More than one to two years11false 3us-gaap_TimeDepositMaturitiesRollingYearThreeus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1257100012571000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse1500600015006000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of time deposits maturing in the third rolling twelve months following the latest balance sheet presented. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.No definition available.false2More than two to three years12false 3us-gaap_TimeDepositMaturitiesRollingYearFourus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1086900010869000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse62690006269000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of time deposits maturing in the fourth rolling twelve months following the latest balance sheet presented. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.No definition available.false2More than three to four years13false 3us-gaap_TimeDepositMaturitiesRollingYearFiveus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2249000022490000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2424800024248000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of time deposits maturing in the fifth rolling twelve months following the latest balance sheet presented. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.No definition available.false2More than four through five years14false 3us-gaap_TimeDepositMaturitiesAfterRollingYearFiveus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse2600026000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse2000020000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of time deposits maturing after the fifth rolling twelve months following the latest balance sheet presented. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.No definition available.false2After five years15false 3us-gaap_TimeDepositsus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse712393000712393000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse736920000736920000USD$falsetruefalse4truefalsefalse878733000878733000USD$falsetruefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 9 true2Time depositsfalseDeposits (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://wsbonline.com/role/DepositsDetails515