$WSBF
Waterstone Financial, Inc. Stock $wsbf

$wsbf Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000156999421000008 Filed on March 02, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2018 Q4
Revenue
YoY Change
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.700M	$700.0K	$3.000M
YoY Change	428.57%	-76.67%	400.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$37.01M	$11.77M	$7.260M
YoY Change	214.44%	62.12%	-21.0%
Income Tax	$9.170M	$2.970M	$1.580M
% Of Pretax Income	24.78%	25.23%	21.76%
Net Earnings	$27.84M	$8.790M	$5.680M
YoY Change	216.72%	54.75%	82.05%
Net Earnings / Revenue
Basic Earnings Per Share
Diluted Earnings Per Share	$1.165M	$339.8K	$208.5K
COMMON SHARES
Basic Shares Outstanding	25.16M	27.15M
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q4	2019 Q4	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$94.77M	$74.30M	$86.10M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$23.72M	$25.03M	$24.52M
YoY Change	-5.22%	2.06%	7.09%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.185B	$1.996B	$1.915B
YoY Change	9.43%	4.23%	6.03%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$10.60M	$13.10M	$4.400M
YoY Change	-19.08%	197.73%	-10.2%
Deferred Revenue
YoY Change
Short-Term Debt	$29.00M	$13.60M	$5.000M
YoY Change	113.24%	172.0%	-55.75%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$10.60M	$13.10M	$4.400M
YoY Change	-19.08%	197.73%	-10.2%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$67.90M	$38.20M	$37.80M
YoY Change	77.75%	1.06%	5.59%
Total Long-Term Liabilities	$67.90M	$38.20M	$37.80M
YoY Change	77.75%	1.06%	5.59%
TOTAL LIABILITIES
Total Short-Term Liabilities	$10.60M	$13.10M	$4.400M
Total Long-Term Liabilities	$67.90M	$38.20M	$37.80M
Total Liabilities	$1.771B	$1.603B	$1.516B
YoY Change	10.53%	5.74%	8.71%
SHAREHOLDERS EQUITY
Retained Earnings	$245.3M	$197.4M	$187.2M
YoY Change	24.26%	5.47%
Common Stock	$251.0K	$271.0K	$285.0K
YoY Change	-7.38%	-4.91%
Preferred Stock
YoY Change
Treasury Stock (at cost)			$97.92M
YoY Change
Treasury Stock Shares			$7.172M
Shareholders Equity	$413.1M	$393.7M	$399.7M
YoY Change
Total Liabilities & Shareholders Equity	$2.185B	$1.996B	$1.915B
YoY Change	9.43%	4.23%	6.03%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2018 Q4
OPERATING ACTIVITIES
Net Income	$27.84M	$8.790M	$5.680M
YoY Change	216.72%	54.75%	82.05%
Depreciation, Depletion And Amortization	$3.700M	$700.0K	$3.000M
YoY Change	428.57%	-76.67%	400.0%
Cash From Operating Activities	$15.80M	$28.10M	$65.20M
YoY Change	-43.77%	-56.9%	94.05%
INVESTING ACTIVITIES
Capital Expenditures	-$300.0K	-$900.0K	-$2.700M
YoY Change	-66.67%	-66.67%	285.71%
Acquisitions
YoY Change
Other Investing Activities	$59.50M	-$900.0K	-$26.50M
YoY Change	-6711.11%	-96.6%	-9.56%
Cash From Investing Activities	$59.30M	-$1.800M	-$29.20M
YoY Change	-3394.44%	-93.84%	-2.67%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-66.80M	-18.20M	-8.800M
YoY Change	267.03%	106.82%	-81.47%
NET CHANGE
Cash From Operating Activities	15.80M	28.10M	65.20M
Cash From Investing Activities	59.30M	-1.800M	-29.20M
Cash From Financing Activities	-66.80M	-18.20M	-8.800M
Net Change In Cash	8.300M	8.100M	27.20M
YoY Change	2.47%	-70.22%	-161.96%
FREE CASH FLOW
Cash From Operating Activities	$15.80M	$28.10M	$65.20M
Capital Expenditures	-$300.0K	-$900.0K	-$2.700M
Free Cash Flow	$16.10M	$29.00M	$67.90M
YoY Change	-44.48%	-57.29%	97.96%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001569994
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilities
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<table cellpadding="0" cellspacing="0" class="DSPFListTable" id="zfa1f7114a6eb4b47a81e6e85a811ab46" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;"> <tr> <td style="width: 18pt;"/> <td style="width: 18pt; vertical-align: top; align: right; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-style: italic; font-weight: bold;">c)</td> <td style="width: auto; vertical-align: top; text-align: left;"><div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-style: italic; font-weight: bold;">Use of Estimates</div></td> </tr> </table> <div style="text-align: justify; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"> </div> <div style="text-align: justify; margin-left: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">The preparation of the consolidated financial statements requires management of the Company to make a number of estimates and assumptions relating to the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. Significant items subject to such estimates and assumptions include: the allowance for loan losses, income taxes, and fair value measurements.</div>
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	748000
CY2020Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	57547000
CY2019Q4	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	31213000
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Entity File Number EntityFileNumber	001-36271
CY2020	dei	Entity Registrant Name EntityRegistrantName	WATERSTONE FINANCIAL, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	90-1026709
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	11200 W Plank Ct
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Wauwatosa
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	WI
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	53226
CY2020	dei	City Area Code CityAreaCode	414
CY2020	dei	Local Phone Number LocalPhoneNumber	761-1000
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.01 Par Value
CY2020	dei	Trading Symbol TradingSymbol	WSBF
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	383300000
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	25117634
CY2020Q4	us-gaap	Cash Cash	56190000
CY2019Q4	us-gaap	Cash Cash	52814000
CY2020Q4	us-gaap	Federal Funds Sold FederalFundsSold	18847000
CY2019Q4	us-gaap	Federal Funds Sold FederalFundsSold	12704000
CY2020Q4	wsbf	Interest Earning Deposits In Other Financial Institutions And Other Short Term Investments InterestEarningDepositsInOtherFinancialInstitutionsAndOtherShortTermInvestments	19730000
CY2019Q4	wsbf	Interest Earning Deposits In Other Financial Institutions And Other Short Term Investments InterestEarningDepositsInOtherFinancialInstitutionsAndOtherShortTermInvestments	8782000
CY2020Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	94767000
CY2019Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	74300000
CY2020Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	159619000
CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	178476000
CY2020Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	402003000
CY2019Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	220123000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1375137000
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1388031000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18823000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	12387000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1356314000
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1375644000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23722000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25028000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	322000
CY2020Q4	us-gaap	Assets Assets	2184587000
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	26720000
CY2019Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	21150000
CY2020Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	63573000
CY2019Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	69665000
CY2019Q4	us-gaap	Assets Assets	1996347000
CY2020Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	188225000
CY2019Q4	us-gaap	Demand Deposit Accounts DemandDepositAccounts	130063000
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	27148411
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2326000
CY2020Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	295317000
CY2019Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	197942000
CY2020Q4	us-gaap	Time Deposits TimeDeposits	701328000
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CY2020Q4	us-gaap	Deposits Deposits	1184870000
CY2019Q4	us-gaap	Deposits Deposits	1067776000
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	508074000
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	483562000
CY2020Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	3522000
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CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	75003000
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	47111000
CY2020Q4	us-gaap	Liabilities Liabilities	1771469000
CY2019Q4	us-gaap	Liabilities Liabilities	1602661000
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
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CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25087976
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CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	25087976
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	251000
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	271000
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	180684000
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CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	245287000
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CY2020Q4	wsbf	Unearned Esop Shares Cost UnearnedESOPSharesCost	15430000
CY2019Q4	wsbf	Unearned Esop Shares Cost UnearnedESOPSharesCost	16617000
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	642000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	413118000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	393686000
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2184587000
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1996347000
CY2020	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	72633000
CY2019	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	72235000
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	79741000
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	73700000
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	14365000
CY2019	us-gaap	Interest Expense Deposits InterestExpenseDeposits	17278000
CY2018	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	66966000
CY2020	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2488000
CY2019	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2978000
CY2018	us-gaap	Interest Income Securities Mortgage Backed InterestIncomeSecuritiesMortgageBacked	2648000
CY2020	us-gaap	Interest Income Securities State And Municipal InterestIncomeSecuritiesStateAndMunicipal	3363000
CY2019	us-gaap	Interest Income Securities State And Municipal InterestIncomeSecuritiesStateAndMunicipal	4528000
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CY2019	us-gaap	Interest Expense InterestExpense	27544000
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CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1905000
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CY2020	us-gaap	Noninterest Income NoninterestIncome	244017000
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CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26021000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27363000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24607000
CY2020	us-gaap	Advertising Expense AdvertisingExpense	3691000
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CY2018	us-gaap	Advertising Expense AdvertisingExpense	4123000
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3941000
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CY2019	us-gaap	Communication Communication	1359000
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CY2020	us-gaap	Professional Fees ProfessionalFees	8118000
CY2019	us-gaap	Professional Fees ProfessionalFees	3605000
CY2018	us-gaap	Professional Fees ProfessionalFees	2327000
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CY2019	wsbf	Real Estate Owned RealEstateOwned	-146000
CY2018	wsbf	Real Estate Owned RealEstateOwned	1000
CY2020	us-gaap	Loan Processing Fee LoanProcessingFee	4646000
CY2019	us-gaap	Loan Processing Fee LoanProcessingFee	3288000
CY2018	us-gaap	Loan Processing Fee LoanProcessingFee	3372000
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	12075000
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8328000
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	10291000
CY2020	us-gaap	Noninterest Expense NoninterestExpense	183061000
CY2019	us-gaap	Noninterest Expense NoninterestExpense	136273000
CY2018	us-gaap	Noninterest Expense NoninterestExpense	133156000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	108116000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	47574000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	40280000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26971000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11671000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9526000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	81145000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	35903000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	30754000
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.32
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.38
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.12
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.30
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26247000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27634000
CY2020	us-gaap	Profit Loss ProfitLoss	81145000
CY2019	us-gaap	Profit Loss ProfitLoss	35903000
CY2018	us-gaap	Profit Loss ProfitLoss	30754000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-630000
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1122000
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	710000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1684000
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3003000
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1889000
CY2020	wsbf	Recognition Of Net Deferred Tax Liability Revaluation Due To Tax Law Change RecognitionOfNetDeferredTaxLiabilityRevaluationDueToTaxLawChange	0
CY2019	wsbf	Recognition Of Net Deferred Tax Liability Revaluation Due To Tax Law Change RecognitionOfNetDeferredTaxLiabilityRevaluationDueToTaxLawChange	0
CY2018	wsbf	Recognition Of Net Deferred Tax Liability Revaluation Due To Tax Law Change RecognitionOfNetDeferredTaxLiabilityRevaluationDueToTaxLawChange	5000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1684000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3003000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1884000
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	82829000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	38906000
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	28870000
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	412104000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	30754000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1884000
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	28870000
CY2018	wsbf	Reclassification For Net Deferred Tax Liability Revaluation ReclassificationForNetDeferredTaxLiabilityRevaluation	-5000
CY2018	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	1796000
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.98
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	26954000
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1304000
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	1760000
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	19196000
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	399679000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	35903000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3003000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	38906000
CY2019	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	1805000
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.98
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	25663000
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	659000
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	1067000
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	22767000
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	393686000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	81145000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1684000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	82829000
CY2020	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	1676000
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.36
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	33251000
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	3704000
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	3134000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1152000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	716000
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	36242000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	413118000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	81145000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	35903000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	30754000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6340000
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-900000
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-1060000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5606000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4698000
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	4727000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2620000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	639000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	535000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	716000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	1067000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	1760000
CY2020	wsbf	Payments For Origination Of Mortgage Servicing Rights Msr PaymentsForOriginationOfMortgageServicingRightsMSR	13406000
CY2019	wsbf	Payments For Origination Of Mortgage Servicing Rights Msr PaymentsForOriginationOfMortgageServicingRightsMSR	354000
CY2018	wsbf	Payments For Origination Of Mortgage Servicing Rights Msr PaymentsForOriginationOfMortgageServicingRightsMSR	427000
CY2020	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	245358000
CY2019	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	128928000
CY2018	us-gaap	Gain Loss On Sale Of Loans And Leases GainLossOnSaleOfLoansAndLeases	109526000
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	4332028000
CY2019	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	2853222000
CY2018	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	2509827000
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	4395505000
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	2903643000
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	2627634000
CY2020	wsbf	Gain On Death Benefit On Bank Owned Life Insurance GainOnDeathBenefitOnBankOwnedLifeInsurance	1456000
CY2019	wsbf	Gain On Death Benefit On Bank Owned Life Insurance GainOnDeathBenefitOnBankOwnedLifeInsurance	0
CY2018	wsbf	Gain On Death Benefit On Bank Owned Life Insurance GainOnDeathBenefitOnBankOwnedLifeInsurance	0
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-387000
CY2019	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	7000
CY2018	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	413000
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1905000
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1935000
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	1848000
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-422000
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	164000
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	509000
CY2020	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-113000
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-330000
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	1178000
CY2020	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	107000
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-7523000
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	1013000
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-545000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-100567000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-40219000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	41503000
CY2020	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	-12353000
CY2019	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	304000
CY2018	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	265000
CY2020	wsbf	Gain Loss On Sale Of Mortgage Servicing Rights GainLossOnSaleOfMortgageServicingRights	600000
CY2019	wsbf	Gain Loss On Sale Of Mortgage Servicing Rights GainLossOnSaleOfMortgageServicingRights	0
CY2018	wsbf	Gain Loss On Sale Of Mortgage Servicing Rights GainLossOnSaleOfMortgageServicingRights	417000
CY2019	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	9896000
CY2018	us-gaap	Payments For Proceeds From Loans Receivable PaymentsForProceedsFromLoansReceivable	87648000
CY2020	wsbf	Net Change On Fhlb Stock NetChangeOnFHLBStock	-5570000
CY2019	wsbf	Net Change On Fhlb Stock NetChangeOnFHLBStock	-1800000
CY2018	wsbf	Net Change On Fhlb Stock NetChangeOnFHLBStock	-2475000
CY2020	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	10125000
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0
CY2020	us-gaap	Payments To Acquire Mortgage Backed Securities Mbs Categorized As Available For Sale PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	19372000
CY2019	us-gaap	Payments To Acquire Mortgage Backed Securities Mbs Categorized As Available For Sale PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	28860000
CY2018	us-gaap	Payments To Acquire Mortgage Backed Securities Mbs Categorized As Available For Sale PaymentsToAcquireMortgageBackedSecuritiesMBSCategorizedAsAvailableForSale	28058000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1225000
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3114000
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3962000
CY2020	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	180000
CY2019	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	180000
CY2018	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	180000
CY2020	wsbf	Mortgage Banking Branch MortgageBankingBranch	0
CY2019	wsbf	Mortgage Banking Branch MortgageBankingBranch	0
CY2018	wsbf	Mortgage Banking Branch MortgageBankingBranch	163000
CY2020	wsbf	Proceeds From Principal Payments Of Mortgage Backed Securities Mbs Available For Sale ProceedsFromPrincipalPaymentsOfMortgageBackedSecuritiesMBSAvailableForSale	45254000
CY2019	wsbf	Proceeds From Principal Payments Of Mortgage Backed Securities Mbs Available For Sale ProceedsFromPrincipalPaymentsOfMortgageBackedSecuritiesMBSAvailableForSale	31944000
CY2018	wsbf	Proceeds From Principal Payments Of Mortgage Backed Securities Mbs Available For Sale ProceedsFromPrincipalPaymentsOfMortgageBackedSecuritiesMBSAvailableForSale	28572000
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	5290000
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	8080000
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	10435000
CY2020	us-gaap	Payments For Proceeds From Mortgage Servicing Rights PaymentsForProceedsFromMortgageServicingRights	-6985000
CY2019	us-gaap	Payments For Proceeds From Mortgage Servicing Rights PaymentsForProceedsFromMortgageServicingRights	0
CY2018	us-gaap	Payments For Proceeds From Mortgage Servicing Rights PaymentsForProceedsFromMortgageServicingRights	-1433000
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	9633000
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	474000
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	1133000
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	2674000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-78438000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	44176000
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	117094000
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	29281000
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	71115000
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	24512000
CY2019	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	8516000
CY2018	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-41239000
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	125000000
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	165000000
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	165000000
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	255000000
CY2020	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-690000
CY2019	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-159000
CY2018	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-505000
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	31520000
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	25960000
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	27050000
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	3704000
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	659000
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1304000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	36242000
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	22767000
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	19196000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	76858000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	29570000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	74429000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	20467000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-11801000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	37494000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	74300000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	86101000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	48607000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	94767000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	74300000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	86101000
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	29478000
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10703000
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10168000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	25406000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	27380000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	19014000
CY2020	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	637000
CY2019	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	1052000
CY2018	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	545000
CY2020	wsbf	Dividends Declared But Not Paid In Other Liabilities DividendsDeclaredButNotPaidInOtherLiabilities	5232000
CY2019	wsbf	Dividends Declared But Not Paid In Other Liabilities DividendsDeclaredButNotPaidInOtherLiabilities	3501000
CY2018	wsbf	Dividends Declared But Not Paid In Other Liabilities DividendsDeclaredButNotPaidInOtherLiabilities	3798000
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	155732000
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1121000
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2
CY2020	wsbf	Federal Funds And Debt Instruments Maturity Period FederalFundsAndDebtInstrumentsMaturityPeriod	P3M
CY2020	wsbf	Mortgage Loans Selling Period MortgageLoansSellingPeriod	P45D
CY2020	wsbf	Percentage Of Costs Expensed On Appropriate Noninterest Expense PercentageOfCostsExpensedOnAppropriateNoninterestExpense	0.760
CY2020	wsbf	Period For Interest Or Principal Of Loans To Become Past Due PeriodForInterestOrPrincipalOfLoansToBecomePastDue	P90D
CY2020	wsbf	Minimum Number Of Consecutive Contractual Payments MinimumNumberOfConsecutiveContractualPayments	6
CY2020	wsbf	Period Of Allowance For Loan Losses To Be Considered To The Extent The Net Carrying Value Of Loan Exceeds Estimated Fair Value PeriodOfAllowanceForLoanLossesToBeConsideredToTheExtentTheNetCarryingValueOfLoanExceedsEstimatedFairValue	P90D
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	5008000
CY2020Q4	wsbf	Realized Percentage Of Income Tax Benefit RealizedPercentageOfIncomeTaxBenefit	0.50
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	159619000
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	176903000
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2993000
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1420000
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	178476000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	6934000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	6992000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	36309000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	37520000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	18146000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	17808000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	5123000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	5250000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	89220000
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	92049000
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	155732000
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	159619000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	6969000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	28000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	8907000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1093000
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	15876000
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1121000
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	24752000
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	157000
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	18909000
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1263000
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	43661000
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1420000
CY2020	wsbf	Indexed Period For Transition Of Fixed Interest Rate To Floating Interest Rate IndexedPeriodForTransitionOfFixedInterestRateToFloatingInterestRate	P10Y
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1375137000
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1388031000
CY2020	wsbf	Percentage Of Loans Secured By Residential Real Estate PercentageOfLoansSecuredByResidentialRealEstate	0.737
CY2019Q4	us-gaap	Loans And Leases Receivable Collateral For Secured Borrowings LoansAndLeasesReceivableCollateralForSecuredBorrowings	1070000000.00
CY2020Q4	us-gaap	Loans And Leases Receivable Collateral For Secured Borrowings LoansAndLeasesReceivableCollateralForSecuredBorrowings	1070000000.00
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	7896000
CY2020Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	499000000.0
CY2019Q4	us-gaap	Federal Home Loan Bank Advances FederalHomeLoanBankAdvances	470000000.0
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	7200000
CY2019Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	6300000
CY2019Q4	wsbf	Loans And Leases Receivable Related Parties Past Due Or Impaired LoansAndLeasesReceivableRelatedPartiesPastDueOrImpaired	0
CY2020Q4	wsbf	Loans And Leases Receivable Related Parties Past Due Or Impaired LoansAndLeasesReceivableRelatedPartiesPastDueOrImpaired	0
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1367241000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1375137000
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	6465000
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	1381566000
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1388031000
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	1600000
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	2000000.0
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	12387000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6340000
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	118000
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	214000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	18823000
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	13249000
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-900000
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	179000
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	217000
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	12387000
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	14077000
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-1060000
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	84000
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	316000
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	13249000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	23000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	18800000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	18823000
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	16597000
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1358540000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1375137000
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	39000
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	12348000
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	12387000
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10057000
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1377974000
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1388031000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1375137000
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1388031000
CY2020	wsbf	Loans Requiring Officers Loans Committee Review And Approval Minimum LoansRequiringOfficersLoansCommitteeReviewAndApprovalMinimum	500000
CY2020	wsbf	Minimum Amount Of Potential Loan Exposure To Be Reviewed By Credit Management Personnel MinimumAmountOfPotentialLoanExposureToBeReviewedByCreditManagementPersonnel	1000000.0
CY2020	wsbf	Maximum Period Of Time Loan Reviewed Under Renewal Condition MaximumPeriodOfTimeLoanReviewedUnderRenewalCondition	P1Y
CY2020	wsbf	Period Of Time Sales Of Real Estate Owned Fair Value Is Based PeriodOfTimeSalesOfRealEstateOwnedFairValueIsBased	P2Y
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	208000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	208000
CY2020Q4	wsbf	Total Impaired Loans With Reserve Reserve TotalImpairedLoansWithReserveReserve	23000
CY2020Q4	wsbf	Total Impaired Loans With Reserve Cumulative Charge Offs TotalImpairedLoansWithReserveCumulativeChargeOffs	0
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	213000
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	15000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	16389000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	17255000
CY2020Q4	wsbf	Total Impaired Loans With No Reserve Reserve TotalImpairedLoansWithNoReserveReserve	0
CY2020Q4	wsbf	Total Impaired Loans With No Reserve Cumulative Charge Offs TotalImpairedLoansWithNoReserveCumulativeChargeOffs	866000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	16633000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	706000
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	16597000
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	17463000
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	23000
CY2020Q4	wsbf	Total Impaired Loans Cumulative Charge Offs TotalImpairedLoansCumulativeChargeOffs	866000
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	16846000
CY2020	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	721000
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	224000
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	633000
CY2019Q4	wsbf	Total Impaired Loans With Reserve Reserve TotalImpairedLoansWithReserveReserve	39000
CY2019Q4	wsbf	Total Impaired Loans With Reserve Cumulative Charge Offs TotalImpairedLoansWithReserveCumulativeChargeOffs	409000
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	231000
CY2019	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeCashBasisMethod	15000
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	9833000
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	11680000
CY2019Q4	wsbf	Total Impaired Loans With No Reserve Reserve TotalImpairedLoansWithNoReserveReserve	0
CY2019Q4	wsbf	Total Impaired Loans With No Reserve Cumulative Charge Offs TotalImpairedLoansWithNoReserveCumulativeChargeOffs	1847000
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	10170000
CY2019	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Cash Basis Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeCashBasisMethod	616000
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	10057000
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	12313000
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	39000
CY2019Q4	wsbf	Total Impaired Loans Cumulative Charge Offs TotalImpairedLoansCumulativeChargeOffs	2256000
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	10401000
CY2019	us-gaap	Impaired Financing Receivable Interest Income Cash Basis Method ImpairedFinancingReceivableInterestIncomeCashBasisMethod	631000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	16400000
CY2020Q4	wsbf	Total Impaired Loans With No Reserve Cumulative Charge Offs TotalImpairedLoansWithNoReserveCumulativeChargeOffs	866000
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	11569000
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	9
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	4018000
CY2019	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	11
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	11600000
CY2020Q4	wsbf	Valuation Allowance With Respect To Troubled Debt Restructurings ValuationAllowanceWithRespectToTroubledDebtRestructurings	0
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	11600000
CY2019Q4	wsbf	Valuation Allowance With Respect To Troubled Debt Restructurings ValuationAllowanceWithRespectToTroubledDebtRestructurings	7000
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	4000000.0
CY2020Q4	wsbf	Loans Receivable Modifications Loans Performing In Accordance With Modified Terms LoansReceivableModificationsLoansPerformingInAccordanceWithModifiedTerms	11569000
CY2020Q4	wsbf	Number Of Loans Performing In Accordance With Modified Terms NumberOfLoansPerformingInAccordanceWithModifiedTerms	9
CY2020Q4	wsbf	Loans Receivable Modifications Loans In Default LoansReceivableModificationsLoansInDefault	0
CY2020Q4	wsbf	Loans Receivable Modifications In Default Number LoansReceivableModificationsInDefaultNumber	0
CY2020Q4	wsbf	Loans Receivable Modifications Total LoansReceivableModificationsTotal	11569000
CY2020Q4	wsbf	Number Of Loans Total NumberOfLoansTotal	9
CY2019Q4	wsbf	Loans Receivable Modifications Loans Performing In Accordance With Modified Terms LoansReceivableModificationsLoansPerformingInAccordanceWithModifiedTerms	3570000
CY2019Q4	wsbf	Number Of Loans Performing In Accordance With Modified Terms NumberOfLoansPerformingInAccordanceWithModifiedTerms	9
CY2019Q4	wsbf	Loans Receivable Modifications Loans In Default LoansReceivableModificationsLoansInDefault	448000
CY2019Q4	wsbf	Loans Receivable Modifications In Default Number LoansReceivableModificationsInDefaultNumber	2
CY2019Q4	wsbf	Loans Receivable Modifications Total LoansReceivableModificationsTotal	4018000
CY2019Q4	wsbf	Number Of Loans Total NumberOfLoansTotal	11
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	8031000
CY2020	wsbf	Number Of Loans Modified As Troubled Debt Restructuring NumberOfLoansModifiedAsTroubledDebtRestructuring	3
CY2019	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	0
CY2019	wsbf	Number Of Loans Modified As Troubled Debt Restructuring NumberOfLoansModifiedAsTroubledDebtRestructuring	0
CY2020	wsbf	Financing Receivable Modifications Subsequent Default Number Of Contracts2 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts2	0
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	1200000
CY2020Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	5560000
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Nonperforming Nonaccrual Of Interest LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest	7025000
CY2020	wsbf	Ratio Of Total Non Accrual Loans To Total Loans Net Of Allowance RatioOfTotalNonAccrualLoansToTotalLoansNetOfAllowance	0.0040
CY2019	wsbf	Ratio Of Total Non Accrual Loans To Total Loans Net Of Allowance RatioOfTotalNonAccrualLoansToTotalLoansNetOfAllowance	0.0051
CY2020	wsbf	Ratio Of Total Non Accrual Loans To Total Assets RatioOfTotalNonAccrualLoansToTotalAssets	0.0025
CY2019	wsbf	Ratio Of Total Non Accrual Loans To Total Assets RatioOfTotalNonAccrualLoansToTotalAssets	0.0035
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	55956000
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	55417000
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	32234000
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	30389000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	23722000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	25028000
CY2020	us-gaap	Depreciation Depreciation	2500000
CY2019	us-gaap	Depreciation Depreciation	2500000
CY2018	us-gaap	Depreciation Depreciation	2300000
CY2020	wsbf	Loans Originated For Sale Residential LoansOriginatedForSaleResidential	4330000000
CY2020	wsbf	Sales Of Loans Held For Sale SalesOfLoansHeldForSale	4150000000
CY2020	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	38000
CY2020	wsbf	Generated Mortgage Banking Income GeneratedMortgageBankingIncome	233200000
CY2020Q4	wsbf	Loans Sold On Servicing Retained Basis LoansSoldOnServicingRetainedBasis	871800000
CY2019Q4	wsbf	Loans Sold On Servicing Retained Basis LoansSoldOnServicingRetainedBasis	64900000
CY2020Q4	wsbf	Mortgage Servicing Rights Fair Value MortgageServicingRightsFairValue	7000000.0
CY2019Q4	wsbf	Mortgage Servicing Rights Fair Value MortgageServicingRightsFairValue	282000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	322000
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	748000
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	748000
CY2018Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	2152000
CY2020	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	637000
CY2019	us-gaap	Mortgage Loans On Real Estate Foreclosures MortgageLoansOnRealEstateForeclosures	1052000
CY2020	wsbf	Real Estate Sales RealEstateSales	1063000
CY2020	wsbf	Mortgage Servicing Rights Sold MortgageServicingRightsSold	975900000
CY2020	wsbf	Mortgage Servicing Rights Book Value MortgageServicingRightsBookValue	6400000
CY2019	wsbf	Real Estate Sales RealEstateSales	2446000
CY2020	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	0
CY2019	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	0
CY2020	us-gaap	Mortgage Loans On Real Estate Other Additions MortgageLoansOnRealEstateOtherAdditions	0
CY2019	us-gaap	Mortgage Loans On Real Estate Other Additions MortgageLoansOnRealEstateOtherAdditions	10000
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	322000
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	748000
CY2020Q4	us-gaap	Foreclosed Assets ForeclosedAssets	1700000
CY2019Q4	us-gaap	Foreclosed Assets ForeclosedAssets	2300000
CY2019Q4	wsbf	Servicing Asset At Amortized Cost Net Of Valuation Allowance ServicingAssetAtAmortizedCostNetOfValuationAllowance	282000
CY2018Q4	wsbf	Servicing Asset At Amortized Cost Net Of Valuation Allowance ServicingAssetAtAmortizedCostNetOfValuationAllowance	109000
CY2020	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	13406000
CY2019	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	354000
CY2020	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	1326000
CY2019	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	104000
CY2020	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	6385000
CY2019	us-gaap	Proceeds From Sale Of Mortgage Servicing Rights Msr ProceedsFromSaleOfMortgageServicingRightsMSR	0
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	5977000
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	359000
CY2020Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	0
CY2019Q4	us-gaap	Valuation Allowance For Impairment Of Recognized Servicing Assets Balance ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance	77000
CY2020Q4	wsbf	Servicing Asset At Amortized Cost Net Of Valuation Allowance ServicingAssetAtAmortizedCostNetOfValuationAllowance	5977000
CY2019Q4	wsbf	Servicing Asset At Amortized Cost Net Of Valuation Allowance ServicingAssetAtAmortizedCostNetOfValuationAllowance	282000
CY2020Q4	wsbf	Mortgage Servicing Rights Fair Value MortgageServicingRightsFairValue	7000000.0
CY2020	wsbf	Gain On Sale Of Msr GainOnSaleOfMSR	600000
CY2019	wsbf	Mortgage Servicing Rights Sold MortgageServicingRightsSold	0
CY2020Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	102600000
CY2019Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	91700000
CY2019	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	33000
CY2018	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	33000
CY2020Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	55000000.0
CY2020	wsbf	Interest Expense Money Market And Savings Deposits InterestExpenseMoneyMarketAndSavingsDeposits	1768000
CY2019	wsbf	Interest Expense Money Market And Savings Deposits InterestExpenseMoneyMarketAndSavingsDeposits	1247000
CY2018	wsbf	Interest Expense Money Market And Savings Deposits InterestExpenseMoneyMarketAndSavingsDeposits	599000
CY2020	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	12559000
CY2019	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	15998000
CY2018	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	10995000
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	14365000
CY2019	us-gaap	Interest Expense Deposits InterestExpenseDeposits	17278000
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	11627000
CY2020Q4	us-gaap	Time Deposit Maturities Next Rolling Twelve Months TimeDepositMaturitiesNextRollingTwelveMonths	576939000
CY2020Q4	us-gaap	Time Deposit Maturities Rolling Year Two TimeDepositMaturitiesRollingYearTwo	106407000
CY2020Q4	us-gaap	Time Deposit Maturities Rolling Year Three TimeDepositMaturitiesRollingYearThree	15709000
CY2020Q4	us-gaap	Time Deposit Maturities Rolling Year Four TimeDepositMaturitiesRollingYearFour	1057000
CY2020Q4	us-gaap	Time Deposit Maturities Rolling Year Five TimeDepositMaturitiesRollingYearFive	1216000
CY2020Q4	us-gaap	Time Deposits TimeDeposits	701328000
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	29000000.0
CY2020Q4	wsbf	Percentage Of Carrying Value Of Qualifying One To Four Family Loans PercentageOfCarryingValueOfQualifyingOneToFourFamilyLoans	0.80
CY2020Q4	wsbf	Percentage Of Carrying Value Of Qualifying Home Equity Loans PercentageOfCarryingValueOfQualifyingHomeEquityLoans	0.64
CY2020Q4	wsbf	Percentage Of Carrying Value Of Qualifying Of Over Four Family Loans PercentageOfCarryingValueOfQualifyingOfOverFourFamilyLoans	0.75
CY2020Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	26700000
CY2019Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	21200000
CY2020Q4	us-gaap	Capital Capital	428972000
CY2020Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.2480
CY2020Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	138390000
CY2020Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2020Q4	wsbf	Total Capital To Risk Weighted Assets For Minimum Adequacy Capital Buffer TotalCapitalToRiskWeightedAssetsForMinimumAdequacyCapitalBuffer	181637000
CY2020Q4	wsbf	Total Capital To Risk Weighted Assets For Capital Required For Adequacy Capital Buffer Ratio TotalCapitalToRiskWeightedAssetsForCapitalRequiredForAdequacyCapitalBufferRatio	0.10500
CY2020Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	410149000
CY2019Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	392361000
CY2019Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.1969
CY2020Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.2371
CY2020Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	103792000
CY2020Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2020Q4	wsbf	Tier1 Capital To Risk Weighted Assets For Minimum Adequacy Capital Buffer Tier1CapitalToRiskWeightedAssetsForMinimumAdequacyCapitalBuffer	147039000
CY2020Q4	wsbf	Tier1 Capital To Risk Weighted Assets For Capital Buffer Adequacy Tier1CapitalToRiskWeightedAssetsForCapitalBufferAdequacy	0.08500
CY2020Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	410149000
CY2020Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.2371
CY2020Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	77844000
CY2020Q4	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Capital Adequacy Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioCapitalAdequacyMinimum	0.0450
CY2020Q4	wsbf	Common Equity Tier1 Capital To Risk Weighted Assets For Minimum Adequacy Capital Buffer CommonEquityTier1CapitalToRiskWeightedAssetsForMinimumAdequacyCapitalBuffer	121091000
CY2020Q4	wsbf	Common Equity Tier1 Capital To Risk Weighted Assets For Capital Buffer Adequacy CommonEquityTier1CapitalToRiskWeightedAssetsForCapitalBufferAdequacy	0.07000
CY2020Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	410149000
CY2020Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.1838
CY2020Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	89238000
CY2020Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2019Q4	us-gaap	Capital Capital	404748000
CY2019Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.2617
CY2019Q4	us-gaap	Capital Required For Capital Adequacy CapitalRequiredForCapitalAdequacy	123731000
CY2019Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0800
CY2019Q4	wsbf	Total Capital To Risk Weighted Assets For Minimum Adequacy Capital Buffer TotalCapitalToRiskWeightedAssetsForMinimumAdequacyCapitalBuffer	162398000
CY2019Q4	wsbf	Total Capital To Risk Weighted Assets For Capital Required For Adequacy Capital Buffer Ratio TotalCapitalToRiskWeightedAssetsForCapitalRequiredForAdequacyCapitalBufferRatio	0.1050
CY2019Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	392361000
CY2019Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.2537
CY2019Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy TierOneRiskBasedCapitalRequiredForCapitalAdequacy	92799000
CY2019Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.0600
CY2019Q4	wsbf	Tier1 Capital To Risk Weighted Assets For Minimum Adequacy Capital Buffer Tier1CapitalToRiskWeightedAssetsForMinimumAdequacyCapitalBuffer	131465000
CY2019Q4	wsbf	Tier1 Capital To Risk Weighted Assets For Capital Buffer Adequacy Tier1CapitalToRiskWeightedAssetsForCapitalBufferAdequacy	0.0850
CY2019Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	392361000
CY2019Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.2537
CY2019Q4	us-gaap	Common Equity Tier One Capital Required For Capital Adequacy CommonEquityTierOneCapitalRequiredForCapitalAdequacy	69599000
CY2019Q4	us-gaap	Banking Regulation Common Equity Tier One Risk Based Capital Ratio Capital Adequacy Minimum BankingRegulationCommonEquityTierOneRiskBasedCapitalRatioCapitalAdequacyMinimum	0.0450
CY2019Q4	wsbf	Common Equity Tier1 Capital To Risk Weighted Assets For Minimum Adequacy Capital Buffer CommonEquityTier1CapitalToRiskWeightedAssetsForMinimumAdequacyCapitalBuffer	108265000
CY2019Q4	wsbf	Common Equity Tier1 Capital To Risk Weighted Assets For Capital Buffer Adequacy CommonEquityTier1CapitalToRiskWeightedAssetsForCapitalBufferAdequacy	0.0700
CY2019Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	79691000
CY2019Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.0400
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1159099
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	12.89
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P7Y2M26D
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	4870000
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	331097
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	12.53
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P7Y1M6D
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	1501000
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	80000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	17.23
CY2018	wsbf	Share Based Compensation Arrangement By Share Based Payment Award Options Grant In Period Grant Date Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantInPeriodGrantDateIntrinsicValue	3000
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	106030
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.30
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	473000
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	72000
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	13.97
CY2018Q4	wsbf	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeiture Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitureIntrinsicValue	224000
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1061069
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.21
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y5M19D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	3850000
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	421068
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	12.78
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y2M23D
CY2018Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	1688000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	30000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	17.13
CY2019	wsbf	Share Based Compensation Arrangement By Share Based Payment Award Options Grant In Period Grant Date Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantInPeriodGrantDateIntrinsicValue	56000
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	50298
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.10
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	298000
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	15000
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	15.62
CY2019Q4	wsbf	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeiture Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitureIntrinsicValue	51000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1025771
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.29
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y6M21D
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1799000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	17000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	5887000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	546770
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	12.93
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y3M21D
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	3335000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	35000
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	16.06
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.57
CY2020	wsbf	Share Based Compensation Arrangement By Share Based Payment Award Options Grant In Period Grant Date Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantInPeriodGrantDateIntrinsicValue	97000
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y9M25D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	3945000
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	291944
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.66
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	433827
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	13.31
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	17.17
CY2020Q4	wsbf	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeiture Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitureIntrinsicValue	28000
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	751827
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y5M12D
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	2392000
CY2020Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	751827
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	13.57
CY2020	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P4Y9M25D
CY2020Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	433827
CY2020Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	13.31
CY2020	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P4Y5M12D
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	744000000
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P20M
CY2020	wsbf	Number Of401k Profit Sharing Plans NumberOf401kProfitSharingPlans	2
CY2020	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1400000
CY2019	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	1000000.0
CY2018	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	971000
CY2020	wsbf	Minimum Employee Age Required For Employee Stock Option Plan MinimumEmployeeAgeRequiredForEmployeeStockOptionPlan	P21Y
CY2020	wsbf	Minimum Employee Tenure MinimumEmployeeTenure	P12M
CY2020Q4	wsbf	Minimum Service Hour Required For Employee Stock Option Plan MinimumServiceHourRequiredForEmployeeStockOptionPlan	1000
CY2014Q4	us-gaap	Employee Stock Ownership Plan Esop Debt Structure Direct Loan Amount EmployeeStockOwnershipPlanESOPDebtStructureDirectLoanAmount	23800000
CY2014	wsbf	Stock Issued During Period Additional Shares Employee Stock Ownership Plan StockIssuedDuringPeriodAdditionalSharesEmployeeStockOwnershipPlan	2024000
CY2020	wsbf	Amount Of Share Released AmountOfShareReleased	one-twentieth
CY2014	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	2107561
CY2020	wsbf	Tenure Of Shares Earned TenureOfSharesEarned	P20Y
CY2020	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1800000
CY2019	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1800000
CY2018	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1800000
CY2020Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1475293
CY2019Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1580671
CY2020Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	105378
CY2019Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	105378
CY2020Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	1369915
CY2019Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	1475293
CY2020Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	25800000
CY2019Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	28100000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	22272000
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	8377000
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	7087000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7319000
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2655000
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1904000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	29591000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	11032000
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8991000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2171000
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	619000
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	452000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-449000
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	20000
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	83000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2620000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	639000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	535000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26971000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11671000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9526000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	108116000
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5428000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	47574000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	40280000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	22704000
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	9991000
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	8459000
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2113000
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1570000
CY2020	wsbf	Effective Income Tax Rate Reconciliation Cash Surrender Value Of Life Insurance EffectiveIncomeTaxRateReconciliationCashSurrenderValueOfLifeInsurance	400000
CY2019	wsbf	Effective Income Tax Rate Reconciliation Cash Surrender Value Of Life Insurance EffectiveIncomeTaxRateReconciliationCashSurrenderValueOfLifeInsurance	406000
CY2018	wsbf	Effective Income Tax Rate Reconciliation Cash Surrender Value Of Life Insurance EffectiveIncomeTaxRateReconciliationCashSurrenderValueOfLifeInsurance	388000
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	133000
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	186000
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	188000
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	222000
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	236000
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	248000
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	96000
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	216000
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	177000
CY2020	wsbf	Death Benefit From Boli DeathBenefitFromBOLI	-306000
CY2019	wsbf	Death Benefit From Boli DeathBenefitFromBOLI	0
CY2018	wsbf	Death Benefit From Boli DeathBenefitFromBOLI	0
CY2020	wsbf	Effective Income Tax Rate Reconciliation Stock Compensation Expense EffectiveIncomeTaxRateReconciliationStockCompensationExpense	-387000
CY2019	wsbf	Effective Income Tax Rate Reconciliation Stock Compensation Expense EffectiveIncomeTaxRateReconciliationStockCompensationExpense	-312000
CY2018	wsbf	Effective Income Tax Rate Reconciliation Stock Compensation Expense EffectiveIncomeTaxRateReconciliationStockCompensationExpense	-313000
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-75000
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	119000
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	81000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26971000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11671000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9526000
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.249
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.245
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.236
CY2020Q4	wsbf	Deferred Tax Assets Depreciation DeferredTaxAssetsDepreciation	832000
CY2019Q4	wsbf	Deferred Tax Assets Depreciation DeferredTaxAssetsDepreciation	0
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	312000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	440000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	4682000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	3031000
CY2020Q4	wsbf	Deferred Tax Assets Repurchase Reserve For Loans Sold DeferredTaxAssetsRepurchaseReserveForLoansSold	765000
CY2019Q4	wsbf	Deferred Tax Assets Repurchase Reserve For Loans Sold DeferredTaxAssetsRepurchaseReserveForLoansSold	244000
CY2020Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	23000
CY2019Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	23000
CY2020Q4	wsbf	Interest Recognized For Tax But Not Books InterestRecognizedForTaxButNotBooks	208000
CY2019Q4	wsbf	Interest Recognized For Tax But Not Books InterestRecognizedForTaxButNotBooks	262000
CY2020Q4	wsbf	Deferred Tax Assets Real Estate Owned Write Downs DeferredTaxAssetsRealEstateOwnedWriteDowns	166000
CY2019Q4	wsbf	Deferred Tax Assets Real Estate Owned Write Downs DeferredTaxAssetsRealEstateOwnedWriteDowns	305000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Legal Settlements DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements	1206000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Legal Settlements DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements	0
CY2020Q4	wsbf	Liability Lease LiabilityLease	1855000
CY2019Q4	wsbf	Liability Lease LiabilityLease	2170000
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	49000
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	32000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	10098000
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	6507000
CY2020Q4	wsbf	Deferred Tax Liability Excess Tax Depreciation DeferredTaxLiabilityExcessTaxDepreciation	0
CY2019Q4	wsbf	Deferred Tax Liability Excess Tax Depreciation DeferredTaxLiabilityExcessTaxDepreciation	-80000
CY2020Q4	wsbf	Deferred Tax Liabilities Unrealized Gain On Securities Available For Sale DeferredTaxLiabilitiesUnrealizedGainOnSecuritiesAvailableForSale	1059000
CY2019Q4	wsbf	Deferred Tax Liabilities Unrealized Gain On Securities Available For Sale DeferredTaxLiabilitiesUnrealizedGainOnSecuritiesAvailableForSale	429000
CY2020Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1558000
CY2019Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	75000
CY2020Q4	wsbf	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	52000
CY2019Q4	wsbf	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	51000
CY2020Q4	wsbf	Lease Asset LeaseAsset	-1726000
CY2019Q4	wsbf	Lease Asset LeaseAsset	-2053000
CY2020Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	300000
CY2019Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	406000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4695000
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3094000
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	5403000
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	3413000
CY2020Q4	wsbf	Retained Earnings Excluding State And Federal Taxes RetainedEarningsExcludingStateAndFederalTaxes	16700000
CY2019Q1	us-gaap	Loss Contingency Pending Claims Number LossContingencyPendingClaimsNumber	95
CY2020	us-gaap	Litigation Settlement Amount Awarded To Other Party LitigationSettlementAmountAwardedToOtherParty	4250000
CY2019	wsbf	Real Estate Owned Writedowns RealEstateOwnedWritedowns	0
CY2020Q4	wsbf	Impairment On Mortgage Servicing Rights ImpairmentOnMortgageServicingRights	77000
CY2019Q4	wsbf	Impairment On Mortgage Servicing Rights ImpairmentOnMortgageServicingRights	77000
CY2020Q4	wsbf	Loans And Leases Receivable Impaired Outstanding Balance LoansAndLeasesReceivableImpairedOutstandingBalance	208000
CY2020Q4	wsbf	Loans And Leases Receivable Impaired Specific Reserve LoansAndLeasesReceivableImpairedSpecificReserve	23000
CY2019Q4	wsbf	Loans And Leases Receivable Impaired Outstanding Balance LoansAndLeasesReceivableImpairedOutstandingBalance	224000000
CY2019Q4	wsbf	Loans And Leases Receivable Impaired Specific Reserve LoansAndLeasesReceivableImpairedSpecificReserve	39000
CY2020	wsbf	Real Estate Owned Writedowns RealEstateOwnedWritedowns	0
CY2020	us-gaap	Net Income Loss NetIncomeLoss	81145000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	35903000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	30754000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	24464000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	26021000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27363000
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	143000
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	226000
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	271000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24607000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	26247000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27634000
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.32
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.38
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.12
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.30
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.37
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.11
CY2020	us-gaap	Occupancy Net OccupancyNet	10223000
CY2020	us-gaap	Advertising Expense AdvertisingExpense	3691000
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3941000
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2
CY2020	wsbf	Number Of States Products And Services Are Provided NumberOfStatesProductsAndServicesAreProvided	22
CY2020	wsbf	Number Of States The Company Can Lend NumberOfStatesTheCompanyCanLend	48
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	53500000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6340000
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	47160000
CY2020	us-gaap	Noninterest Income NoninterestIncome	244017000
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	139046000
CY2020	us-gaap	Communication Communication	1329000
CY2020	us-gaap	Professional Fees ProfessionalFees	8118000
CY2020	wsbf	Real Estate Owned RealEstateOwned	-8000
CY2020	us-gaap	Loan Processing Fee LoanProcessingFee	4646000
CY2020	wsbf	Segment Reporting Information Other Noninterest Expenses SegmentReportingInformationOtherNoninterestExpenses	12075000
CY2020	us-gaap	Noninterest Expense NoninterestExpense	183061000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	108116000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26971000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	81145000
CY2020Q4	us-gaap	Assets Assets	2184587000
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	52197000
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-900000
CY2019	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	53097000
CY2019	us-gaap	Noninterest Income NoninterestIncome	130750000
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	101718000
CY2019	us-gaap	Occupancy Net OccupancyNet	10606000
CY2019	us-gaap	Advertising Expense AdvertisingExpense	3885000
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3630000
CY2019	us-gaap	Communication Communication	1359000
CY2019	us-gaap	Professional Fees ProfessionalFees	3605000
CY2019	wsbf	Real Estate Owned RealEstateOwned	-146000
CY2019	us-gaap	Loan Processing Fee LoanProcessingFee	3288000
CY2019	wsbf	Segment Reporting Information Other Noninterest Expenses SegmentReportingInformationOtherNoninterestExpenses	8328000
CY2019	us-gaap	Noninterest Expense NoninterestExpense	136273000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	47574000
CY2018	wsbf	Real Estate Owned RealEstateOwned	1000
CY2018	us-gaap	Loan Processing Fee LoanProcessingFee	3372000
CY2018	wsbf	Segment Reporting Information Other Noninterest Expenses SegmentReportingInformationOtherNoninterestExpenses	10291000
CY2018	us-gaap	Noninterest Expense NoninterestExpense	133156000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	40280000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9526000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	30754000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11671000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	35903000
CY2019Q4	us-gaap	Assets Assets	1996347000
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	54177000
CY2018	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-1060000
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	55237000
CY2018	us-gaap	Noninterest Income NoninterestIncome	118199000
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	97784000
CY2018	us-gaap	Occupancy Net OccupancyNet	10855000
CY2018	us-gaap	Advertising Expense AdvertisingExpense	4123000
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2792000
CY2018	us-gaap	Communication Communication	1611000
CY2018	us-gaap	Professional Fees ProfessionalFees	2327000
CY2018Q4	us-gaap	Assets Assets	1915381000
CY2020Q4	wsbf	Number Of Branch Locations NumberOfBranchLocations	2
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	7100000
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	6600000
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	3158000
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	487000
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	737000
CY2020	us-gaap	Lease Cost LeaseCost	4382000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	3500000
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y6M3D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.055
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	2726000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1970000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1527000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	939000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	531000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	896000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	8589000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1457000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	7132000

Files In Submission

Name	View Source	Status
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0001569994-21-000008-index.html	Edgar Link	pending
0001569994-21-000008.txt	Edgar Link	pending
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exhibit231k.htm	Edgar Link	pending
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exhibit321k.htm	Edgar Link	pending
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report.css	Edgar Link	pending
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wsbf-20201231.xsd	Edgar Link	pending
wsbf-20201231_cal.xml	Edgar Link	unprocessable
wsbf-20201231_def.xml	Edgar Link	unprocessable
wsbf-20201231_lab.xml	Edgar Link	unprocessable
wsbf-20201231_pre.xml	Edgar Link	unprocessable

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$WSBF
Waterstone Financial, Inc. Stock $wsbf

2020 Q4 Form 10-K Financial Statement

#000156999421000008 Filed on March 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WSBF Waterstone Financial, Inc. Stock $wsbf

2020 Q4 Form 10-K Financial Statement

#000156999421000008 Filed on March 02, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WSBF
Waterstone Financial, Inc. Stock $wsbf