$FSBW
FS Bancorp, Inc. Stock $fsbw

$fsbw Overview Financials Valuation SEC Filings Company Website

2023 Q4 Form 10-Q Financial Statement

#000143774923030868 Filed on November 08, 2023

Income Statement

Concept	2023 Q4	2023 Q3	2022 Q4
Revenue		$1.240M
YoY Change		52.71%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin		$3.409M
YoY Change		21.23%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.149M	$3.300M	$3.540M
YoY Change	-11.05%	18.58%	1.14%
% of Gross Profit
Operating Expenses		$3.409M
YoY Change		21.23%
Operating Profit
YoY Change
Interest Expense		$12.64M
YoY Change		234.55%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$12.08M	$11.48M	$9.564M
YoY Change	26.27%	7.79%	-9.86%
Income Tax	$2.304M	$2.529M	$1.942M
% Of Pretax Income	19.08%	22.03%	20.31%
Net Earnings	$9.617M	$8.953M	$7.482M
YoY Change	28.54%	5.85%	-13.5%
Net Earnings / Revenue		722.02%
Basic Earnings Per Share		$1.15
Diluted Earnings Per Share	$1.23	$1.13	$0.97
COMMON SHARES
Basic Shares Outstanding	7.798M	7.754M	7.704M
Diluted Shares Outstanding		7.780M

Balance Sheet

Concept	2023 Q4	2023 Q3	2022 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$65.69M	$80.67M	$41.44M
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	$30.58M	$30.93M	$25.12M
YoY Change	21.73%	21.57%	-5.54%
Goodwill	$3.600M	$3.600M	$2.312M
YoY Change	55.71%	55.71%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$14.81M	$7.400M	$6.670M
YoY Change	122.05%	12.62%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.973B	$2.920B	$2.633B
YoY Change	12.9%	10.1%	15.16%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$6.848M	$7.300M	$6.474M
YoY Change	5.78%	6.79%	34.88%
Deferred Revenue
YoY Change
Short-Term Debt	$93.75M	$121.9M	$186.5M
YoY Change	-49.74%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$6.848M	$7.300M	$6.474M
YoY Change	5.78%	6.79%	34.88%
LONG-TERM LIABILITIES
Long-Term Debt	$49.53M	$49.50M	$49.46M
YoY Change	0.13%	0.11%	0.12%
Other Long-Term Liabilities	$35.74M	$36.30M	$31.00M
YoY Change	15.29%	16.55%	23.0%
Total Long-Term Liabilities	$85.26M	$85.80M	$80.46M
YoY Change	5.97%	6.47%	7.85%
TOTAL LIABILITIES
Total Short-Term Liabilities	$6.848M	$7.300M	$6.474M
Total Long-Term Liabilities	$85.26M	$85.80M	$80.46M
Total Liabilities	$2.708B	$2.669B	$2.401B
YoY Change	12.78%	9.78%	17.77%
SHAREHOLDERS EQUITY
Retained Earnings	$230.4M	$222.5M	$202.1M
YoY Change	14.0%	13.54%	12.75%
Common Stock	$78.00K	$78.00K	$55.26M
YoY Change	-99.86%	-99.86%	-18.78%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$264.5M	$250.7M	$231.7M
YoY Change
Total Liabilities & Shareholders Equity	$2.973B	$2.920B	$2.633B
YoY Change	12.9%	10.1%	15.16%

Cashflow Statement

Concept	2023 Q4	2023 Q3	2022 Q4
OPERATING ACTIVITIES
Net Income	$9.617M	$8.953M	$7.482M
YoY Change	28.54%	5.85%	-13.5%
Depreciation, Depletion And Amortization	$3.149M	$3.300M	$3.540M
YoY Change	-11.05%	18.58%	1.14%
Cash From Operating Activities	$12.67M	$22.80M	$20.95M
YoY Change	-39.53%	-34.81%	120.55%
INVESTING ACTIVITIES
Capital Expenditures	$271.0K	$300.0K	$856.0K
YoY Change	-68.34%	-202.04%	-956.0%
Acquisitions
YoY Change
Other Investing Activities	-$64.56M	-$83.10M	-$107.9M
YoY Change	-40.16%	-44.66%	77.74%
Cash From Investing Activities	-$64.83M	-$83.40M	-$108.7M
YoY Change	-40.38%	-44.57%	78.85%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	37.22M	9.100M	-30.57M
YoY Change	-221.74%	-96.31%	-161.76%
NET CHANGE
Cash From Operating Activities	12.67M	22.80M	20.95M
Cash From Investing Activities	-64.83M	-83.40M	-108.7M
Cash From Financing Activities	37.22M	9.100M	-30.57M
Net Change In Cash	-14.95M	-51.50M	-118.4M
YoY Change	-87.37%	-139.27%	6475.56%
FREE CASH FLOW
Cash From Operating Activities	$12.67M	$22.80M	$20.95M
Capital Expenditures	$271.0K	$300.0K	$856.0K
Free Cash Flow	$12.40M	$22.50M	$20.10M
YoY Change	-38.31%	-36.21%	109.33%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
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	dei	Document Period End Date DocumentPeriodEndDate	2023-09-30
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	dei	Entity File Number EntityFileNumber	001-35589
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WA
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	45-4585178
	dei	Entity Address Address Line1 EntityAddressAddressLine1	6920 220th Street SW
	dei	Entity Address City Or Town EntityAddressCityOrTown	Mountlake Terrace
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98043
	dei	City Area Code CityAreaCode	425
	dei	Local Phone Number LocalPhoneNumber	771‑5299
	dei	Security12b Title Security12bTitle	Common Stock, par value $.01 per share
	dei	Trading Symbol TradingSymbol	FSBW
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
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	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	89476000	usd
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	70346000	usd
CY2023Q3	us-gaap	Fee Income FeeIncome	2882000	usd
CY2022Q3	us-gaap	Fee Income FeeIncome	2327000	usd
	us-gaap	Fee Income FeeIncome	8352000	usd
	us-gaap	Fee Income FeeIncome	6121000	usd
CY2023Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1875000	usd
CY2022Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1402000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	5298000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	7325000	usd
CY2023Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	233000	usd
CY2022Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	221000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	681000	usd
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	654000	usd
CY2023Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	-8000	usd
CY2022Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	231000	usd
	us-gaap	Noninterest Income Other NoninterestIncomeOther	703000	usd
	us-gaap	Noninterest Income Other NoninterestIncomeOther	312000	usd
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	4982000	usd
CY2022Q3	us-gaap	Noninterest Income NoninterestIncome	4181000	usd
	us-gaap	Noninterest Income NoninterestIncome	15034000	usd
	us-gaap	Noninterest Income NoninterestIncome	14412000	usd
CY2023Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	13503000	usd
CY2022Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11402000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	40880000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	35110000	usd
CY2023Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	3409000	usd
CY2022Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	2812000	usd
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	9744000	usd
	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	7656000	usd
CY2023Q3	us-gaap	Occupancy Net OccupancyNet	1588000	usd
CY2022Q3	us-gaap	Occupancy Net OccupancyNet	1344000	usd
	us-gaap	Occupancy Net OccupancyNet	4670000	usd
	us-gaap	Occupancy Net OccupancyNet	3825000	usd
CY2023Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1841000	usd
CY2022Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1548000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	5092000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	4363000	usd
CY2023Q3	us-gaap	Loan Processing Fee LoanProcessingFee	564000	usd
CY2022Q3	us-gaap	Loan Processing Fee LoanProcessingFee	746000	usd
	us-gaap	Loan Processing Fee LoanProcessingFee	2077000	usd
	us-gaap	Loan Processing Fee LoanProcessingFee	2020000	usd
CY2023Q3	us-gaap	Professional Fees ProfessionalFees	666000	usd
CY2022Q3	us-gaap	Professional Fees ProfessionalFees	631000	usd
	us-gaap	Professional Fees ProfessionalFees	2001000	usd
	us-gaap	Professional Fees ProfessionalFees	2387000	usd
CY2023Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	561000	usd
CY2022Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	462000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1732000	usd
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	804000	usd
CY2023Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	452000	usd
CY2022Q3	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	220000	usd
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	1072000	usd
	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	652000	usd
CY2023Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	usd
CY2022Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	usd
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	1562000	usd
	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	usd
CY2023Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1002000	usd
CY2022Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	173000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2484000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	518000	usd
CY2023Q3	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	0	usd
CY2022Q3	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	0	usd
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	0	usd
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-1000	usd
CY2023Q3	us-gaap	Noninterest Expense NoninterestExpense	23586000	usd
CY2022Q3	us-gaap	Noninterest Expense NoninterestExpense	19338000	usd
	us-gaap	Noninterest Expense NoninterestExpense	71314000	usd
	us-gaap	Noninterest Expense NoninterestExpense	57334000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11482000	usd
CY2022Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10652000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	33196000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27424000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2529000	usd
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2194000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6915000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5397000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	8953000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	8458000	usd
	us-gaap	Net Income Loss NetIncomeLoss	26281000	usd
	us-gaap	Net Income Loss NetIncomeLoss	22027000	usd
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.15
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.38
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.77
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.13
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.08
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.33
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.73
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	8953000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	8458000	usd
	us-gaap	Net Income Loss NetIncomeLoss	26281000	usd
	us-gaap	Net Income Loss NetIncomeLoss	22027000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-11762000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-14567000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-9341000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-47046000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2528000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-3131000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-2007000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-10115000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	4337000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	5107000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	8155000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	9651000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	933000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	1098000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	1753000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	2075000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	1446000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	278000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	3624000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	232000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	311000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	60000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	779000	usd
	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	50000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6965000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-7645000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3777000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-29537000	usd
CY2023Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1988000	usd
CY2022Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	813000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	22504000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-7510000	usd
CY2022Q2	us-gaap	Stockholders Equity StockholdersEquity	222641000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	8458000	usd
CY2022Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1547000	usd
CY2022Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	500000	usd
CY2022Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	211000	usd
CY2022Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
CY2022Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1732000	usd
CY2022Q3	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	190000	usd
CY2022Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-149000	usd
CY2022Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-7645000	usd
CY2022Q3	us-gaap	Stockholders Equity StockholdersEquity	220547000	usd
CY2023Q2	us-gaap	Stockholders Equity StockholdersEquity	249933000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	8953000	usd
CY2023Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1940000	usd
CY2023Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	590000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	242000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	-0	usd
CY2023Q3	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	339000	usd
CY2023Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	191000	usd
CY2023Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-6965000	usd
CY2023Q3	us-gaap	Stockholders Equity StockholdersEquity	250665000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	247507000	usd
	us-gaap	Net Income Loss NetIncomeLoss	22027000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5553000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1432000	usd
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	211000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	15628000	usd
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	190000	usd
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	-19000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-29537000	usd
CY2022Q3	us-gaap	Stockholders Equity StockholdersEquity	220547000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	231697000	usd
	us-gaap	Net Income Loss NetIncomeLoss	26281000	usd
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	5814000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1608000	usd
	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	781000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	-0	usd
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	355000	usd
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	244000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3777000	usd
CY2023Q3	us-gaap	Stockholders Equity StockholdersEquity	250665000	usd
	us-gaap	Net Income Loss NetIncomeLoss	26281000	usd
	us-gaap	Net Income Loss NetIncomeLoss	22027000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	3372000	usd
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	4632000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	9505000	usd
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	10464000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1608000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	1432000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	681000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	654000	usd
	fsbw	Gain Loss On Sale Of Loans Held For Sale GainLossOnSaleOfLoansHeldForSale	5298000	usd
	fsbw	Gain Loss On Sale Of Loans Held For Sale GainLossOnSaleOfLoansHeldForSale	6729000	usd
	fsbw	Gain Loss On Sale Of Portfolio Loans GainLossOnSaleOfPortfolioLoans	-0	usd
	fsbw	Gain Loss On Sale Of Portfolio Loans GainLossOnSaleOfPortfolioLoans	596000	usd
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	292309000	usd
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	498975000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	324083000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	630396000	usd
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	0	usd
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	-1000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2251000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2813000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4074000	usd
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3527000	usd
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	4798000	usd
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1236000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	65034000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	163946000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	13492000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	17829000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	46906000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	22968000	usd
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	-0	usd
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	1000000	usd
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	0	usd
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	5582000	usd
	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	12924000	usd
	us-gaap	Payments To Acquire Restricted Certificates Of Deposit PaymentsToAcquireRestrictedCertificatesOfDeposit	-0	usd
	fsbw	Payments For Origination Of Loans And Principle Collections Net PaymentsForOriginationOfLoansAndPrincipleCollectionsNet	150385000	usd
	fsbw	Payments For Origination Of Loans And Principle Collections Net PaymentsForOriginationOfLoansAndPrincipleCollectionsNet	420094000	usd
	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	336157000	usd
	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	usd
	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	0	usd
	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	39034000	usd
	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	2475000	usd
	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	5344000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1395000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	695000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1168000	usd
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-6915000	usd
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	8813000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	142479000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-395301000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-98500000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	167540000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	1725337000	usd
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	1155007000	usd
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	1789970000	usd
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	936707000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5814000	usd
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	5553000	usd
	fsbw	Proceeds Disbursements From Stock Options Exercised ProceedsDisbursementsFromStockOptionsExercised	244000	usd
	fsbw	Proceeds Disbursements From Stock Options Exercised ProceedsDisbursementsFromStockOptionsExercised	-19000	usd
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	355000	usd
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	190000	usd
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	781000	usd
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	211000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	-0	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	15628000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-168277000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	364661000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	39236000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	133306000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	41437000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	26491000	usd
CY2023Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	80673000	usd
CY2022Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	159797000	usd
	us-gaap	Interest Paid Net InterestPaidNet	26280000	usd
	us-gaap	Interest Paid Net InterestPaidNet	5538000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	8355000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2897000	usd
	us-gaap	Debt Securities Available For Sale Unrealized Gain Loss DebtSecuritiesAvailableForSaleUnrealizedGainLoss	-9341000	usd
	us-gaap	Debt Securities Available For Sale Unrealized Gain Loss DebtSecuritiesAvailableForSaleUnrealizedGainLoss	-47046000	usd
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	4523000	usd
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	9405000	usd
	fsbw	Unrealized Gain Loss On Portfolio Loans Measured Under Fair Value Option UnrealizedGainLossOnPortfolioLoansMeasuredUnderFairValueOption	-285000	usd
	fsbw	Unrealized Gain Loss On Portfolio Loans Measured Under Fair Value Option UnrealizedGainLossOnPortfolioLoansMeasuredUnderFairValueOption	-1780000	usd
	fsbw	Retention Of Gross Mortgage Servicing Rights From Loan Sales RetentionOfGrossMortgageServicingRightsFromLoanSales	2279000	usd
	fsbw	Retention Of Gross Mortgage Servicing Rights From Loan Sales RetentionOfGrossMortgageServicingRightsFromLoanSales	4935000	usd
	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	usd
	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	145000	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2034000	usd
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3049000	usd
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	87512000	usd
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	0	usd
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	424949000	usd
	us-gaap	Noncash Or Part Noncash Acquisition Value Of Liabilities Assumed1 NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1	0	usd
CY2023Q3	fsbw	Number Of Bank Branches NumberOfBankBranches	27	pure
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	8500000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	571000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7929000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	31000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Amortized Cost Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss	280293000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Cumulative Unrecognized Gain DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedGain	48000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Cumulative Unrecognized Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedLoss	43160000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	303799000	usd
CY2023Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	129000	usd
CY2023Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	52011000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	251917000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	8500000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	0	usd
CY2023Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1076000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	7424000	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	45000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale And Held To Maturity Amortized Cost Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAmortizedCostBeforeAllowanceForCreditLoss	312299000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale And Held To Maturity Cumulative Unrecognized Gain DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedGain	129000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale And Held To Maturity Cumulative Unrecognized Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityCumulativeUnrecognizedLoss	53087000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	259341000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale And Held To Maturity Allowance For Credit Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAllowanceForCreditLoss	45000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	271793000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	48000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	42589000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	229252000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale And Held To Maturity DebtSecuritiesAvailableForSaleAndHeldToMaturity	312299000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	237181000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Allowance For Credit Loss DebtSecuritiesAvailableForSaleAndHeldToMaturityAllowanceForCreditLoss	31000	usd
CY2023Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	31000	usd
CY2022Q2	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	31000	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityExcludingAccruedInterestCreditLossExpenseReversal	14000	usd
CY2022Q3	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityExcludingAccruedInterestCreditLossExpenseReversal	0	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	45000	usd
CY2022Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	31000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	31000	usd
CY2021Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	0	usd
	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityExcludingAccruedInterestCreditLossExpenseReversal	14000	usd
	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityExcludingAccruedInterestCreditLossExpenseReversal	-41000	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	45000	usd
CY2022Q3	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	31000	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestBeforeAllowanceForCreditLoss	117000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestBeforeAllowanceForCreditLoss	116000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2000000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	1200000	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	8500000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	8500000	usd
CY2023Q3	us-gaap	Debt Securities Held To Maturity Nonaccrual DebtSecuritiesHeldToMaturityNonaccrual	0	usd
CY2023Q3	us-gaap	Investment Owned At Cost InvestmentOwnedAtCost	110588000	usd
CY2023Q3	fsbw	Financial Instruments Owned At Amortized Cost FinancialInstrumentsOwnedAtAmortizedCost	136233000	usd
CY2023Q3	us-gaap	Financial Instruments Owned At Fair Value FinancialInstrumentsOwnedAtFairValue	110588000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	45461000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	683000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	196063000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	51328000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	241524000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	52011000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	0	usd
CY2023Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	-0	usd
CY2023Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	7424000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1076000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	7424000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	1076000	usd
CY2023Q3	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Fair Value DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsFairValue	45461000	usd
CY2023Q3	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	683000	usd
CY2023Q3	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Fair Value DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerFairValue	203487000	usd
CY2023Q3	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	52404000	usd
CY2023Q3	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Fair Value DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionFairValue	248948000	usd
CY2023Q3	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Accumulated Loss Total DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionAccumulatedLossTotal	53087000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	91176000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	10266000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	133700000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	32323000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	224876000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	42589000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	7929000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	571000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	-0	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	7929000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	571000	usd
CY2022Q4	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Fair Value DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsFairValue	99105000	usd
CY2022Q4	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	10837000	usd
CY2022Q4	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Fair Value DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerFairValue	133700000	usd
CY2022Q4	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	32323000	usd
CY2022Q4	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Fair Value DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionFairValue	232805000	usd
CY2022Q4	fsbw	Debt Securities Availableforsale And Heldtomaturity Continuous Unrealized Loss Position Accumulated Loss Total DebtSecuritiesAvailableforsaleAndHeldtomaturityContinuousUnrealizedLossPositionAccumulatedLossTotal	43160000	usd
CY2023Q3	fsbw	Debt Securities Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	0	pure
CY2023Q3	fsbw	Debt Securities Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	7	pure
CY2022Q4	fsbw	Debt Securities Heldtomaturity Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	7	pure
CY2022Q4	fsbw	Debt Securities Heldtomaturity Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesHeldtomaturityContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	pure
CY2023Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	24	pure
CY2023Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	181	pure
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	88	pure
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	106	pure
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	303799000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	251917000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	271793000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	229252000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	8500000	usd
CY2023Q3	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	7424000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Net Carrying Amount HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsNetCarryingAmount	8500000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	7929000	usd
CY2023Q3	us-gaap	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	259341000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity DebtSecuritiesAvailableForSaleAndHeldToMaturity	280293000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale And Held To Maturity Fair Value DebtSecuritiesAvailableForSaleAndHeldToMaturityFairValue	237181000	usd
CY2023Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2406073000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2218852000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	30501000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	27992000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	2375572000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	2190860000	usd
CY2023Q3	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	-8300000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	-7800000	usd
CY2023Q3	us-gaap	Financing Receivable Unamortized Purchase Premium Discount FinancingReceivableUnamortizedPurchasePremiumDiscount	-2800000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Purchase Premium Discount FinancingReceivableUnamortizedPurchasePremiumDiscount	-437000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	30350000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	684000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	830000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	297000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff After Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery	533000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	30501000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	24967000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	2022000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	924000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	361000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff After Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery	563000	usd
CY2022Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	26426000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	27992000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	4102000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	2426000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	833000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff After Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery	1593000	usd
CY2023Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	30501000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	25635000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	4493000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	1744000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	901000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff After Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery	843000	usd
CY2022Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	26426000	usd
CY2023Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2406073000	usd
CY2023Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	5619000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2218852000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	8652000	usd
CY2023Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	384838000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	722521000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	480191000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	268464000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	137606000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	204648000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	206123000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan	1682000	usd
CY2023Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2406073000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff	90000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff	883000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff	587000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff	191000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff	160000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff	415000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Writeoff FinancingReceivableExcludingAccruedInterestRevolvingWriteoff	100000	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan Writeoff FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff	0	usd
	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	2426000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	808060000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	550357000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	284645000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	164717000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	64940000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	166172000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	179462000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan	499000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2218852000	usd
CY2023Q3	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	1428000	usd
CY2023Q3	fsbw	Financing Receivable Nonaccrual With Allowance FinancingReceivableNonaccrualWithAllowance	4191000	usd
CY2023Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	5619000	usd
CY2022Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	966000	usd
CY2022Q4	fsbw	Financing Receivable Nonaccrual With Allowance FinancingReceivableNonaccrualWithAllowance	7686000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	8652000	usd
CY2023Q3	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	55000	usd
CY2022Q3	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	144000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	164000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	370000	usd
CY2023Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	17627000	usd
CY2022Q2	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	18516000	usd
CY2023Q3	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	954000	usd
CY2022Q3	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	925000	usd
CY2023Q3	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	924000	usd
CY2022Q3	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	971000	usd
CY2023Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	17657000	usd
CY2022Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	18470000	usd
CY2022Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	18017000	usd
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	16970000	usd
	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	2279000	usd
	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	4935000	usd
	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	2639000	usd
	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	3436000	usd
	us-gaap	Servicing Asset At Amortized Value Other Changes That Affect Balance Amount ServicingAssetAtAmortizedValueOtherChangesThatAffectBalanceAmount	0	usd
	us-gaap	Servicing Asset At Amortized Value Other Changes That Affect Balance Amount ServicingAssetAtAmortizedValueOtherChangesThatAffectBalanceAmount	1000	usd
CY2023Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	17657000	usd
CY2022Q3	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	18470000	usd
CY2023Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	476000	usd
CY2022Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	350000	usd
CY2023Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	5000	usd
CY2022Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	8000	usd
CY2023Q3	us-gaap	Lease Cost LeaseCost	481000	usd
CY2022Q3	us-gaap	Lease Cost LeaseCost	358000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	1357000	usd
	us-gaap	Operating Lease Cost OperatingLeaseCost	1041000	usd
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	14000	usd
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	16000	usd
	us-gaap	Lease Cost LeaseCost	1371000	usd
	us-gaap	Lease Cost LeaseCost	1057000	usd
CY2023Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	486000	usd
CY2022Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	360000	usd
CY2023Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y2M12D
CY2022Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y8M12D
CY2023Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0293	pure
CY2022Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0241	pure
	us-gaap	Operating Lease Payments OperatingLeasePayments	1392000	usd
	us-gaap	Operating Lease Payments OperatingLeasePayments	1063000	usd
CY2023Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y2M12D
CY2022Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y8M12D
CY2023Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0293	pure
CY2022Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0241	pure
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	483000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1933000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1628000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	1475000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	1173000	usd
CY2023Q3	fsbw	Lessee Operating Lease Liability To Be Paid After Year Four LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	1383000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	8075000	usd
CY2023Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	806000	usd
CY2023Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	7269000	usd
CY2023Q2	us-gaap	Other Real Estate OtherRealEstate	570000	usd
CY2022Q2	us-gaap	Other Real Estate OtherRealEstate	145000	usd
CY2022Q4	us-gaap	Other Real Estate OtherRealEstate	570000	usd
CY2021Q4	us-gaap	Other Real Estate OtherRealEstate	0	usd
CY2023Q3	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	0	usd
CY2022Q3	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	0	usd
	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	0	usd
	us-gaap	Other Real Estate Additions OtherRealEstateAdditions	145000	usd
CY2023Q3	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	usd
CY2022Q3	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	usd
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	usd
CY2023Q3	us-gaap	Other Real Estate OtherRealEstate	570000	usd
CY2022Q3	us-gaap	Other Real Estate OtherRealEstate	145000	usd
CY2023Q3	us-gaap	Other Real Estate OtherRealEstate	570000	usd
CY2022Q3	us-gaap	Other Real Estate OtherRealEstate	145000	usd
CY2023Q3	us-gaap	Noninterest Bearing Domestic Deposit Checking NoninterestBearingDomesticDepositChecking	643670000	usd
CY2022Q4	us-gaap	Noninterest Bearing Domestic Deposit Checking NoninterestBearingDomesticDepositChecking	537938000	usd
CY2023Q3	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	219469000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Checking InterestBearingDomesticDepositChecking	135127000	usd
CY2023Q3	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	157901000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	134358000	usd
CY2023Q3	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	389962000	usd
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	574290000	usd
CY2023Q3	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	527032000	usd
CY2022Q4	us-gaap	Time Deposits Less Than100000 TimeDepositsLessThan100000	440785000	usd
CY2023Q3	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	406545000	usd
CY2022Q4	us-gaap	Time Deposits100000 Or More TimeDeposits100000OrMore	195447000	usd
CY2023Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	83377000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	93560000	usd
CY2023Q3	fsbw	Noninterestbearing Deposit Escrow For Mortgages Serviced NoninterestbearingDepositEscrowForMortgagesServiced	26488000	usd
CY2022Q4	fsbw	Noninterestbearing Deposit Escrow For Mortgages Serviced NoninterestbearingDepositEscrowForMortgagesServiced	16236000	usd
CY2023Q3	us-gaap	Deposits Deposits	2454444000	usd
CY2022Q4	us-gaap	Deposits Deposits	2127741000	usd
CY2023Q3	us-gaap	Time Deposit Maturities Remainder Of Fiscal Year TimeDepositMaturitiesRemainderOfFiscalYear	338756000	usd
CY2023Q3	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	483059000	usd
CY2023Q3	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	128932000	usd
CY2023Q3	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	44517000	usd
CY2023Q3	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	20739000	usd
CY2023Q3	fsbw	Time Deposit Maturities After Year Four TimeDepositMaturitiesAfterYearFour	951000	usd
CY2023Q3	us-gaap	Time Deposits TimeDeposits	1016954000	usd
CY2023Q3	us-gaap	Interest Expense Domestic Deposit Liabilities Checking InterestExpenseDomesticDepositLiabilitiesChecking	643000	usd
CY2022Q3	us-gaap	Interest Expense Domestic Deposit Liabilities Checking InterestExpenseDomesticDepositLiabilitiesChecking	100000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Checking InterestExpenseDomesticDepositLiabilitiesChecking	1111000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Checking InterestExpenseDomesticDepositLiabilitiesChecking	353000	usd
CY2023Q3	fsbw	Interest Expense Money Market Accounts And Savings Deposits InterestExpenseMoneyMarketAccountsAndSavingsDeposits	1529000	usd
CY2022Q3	fsbw	Interest Expense Money Market Accounts And Savings Deposits InterestExpenseMoneyMarketAccountsAndSavingsDeposits	1303000	usd
	fsbw	Interest Expense Money Market Accounts And Savings Deposits InterestExpenseMoneyMarketAccountsAndSavingsDeposits	4071000	usd
	fsbw	Interest Expense Money Market Accounts And Savings Deposits InterestExpenseMoneyMarketAccountsAndSavingsDeposits	2397000	usd
CY2023Q3	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	8290000	usd
CY2022Q3	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	1193000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	19514000	usd
	us-gaap	Interest Expense Domestic Deposit Liabilities Certificates Of Deposit InterestExpenseDomesticDepositLiabilitiesCertificatesOfDeposit	2688000	usd
CY2023Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	10462000	usd
CY2022Q3	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2596000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	24696000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	5438000	usd
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	62544
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	8953000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	8458000	usd
	us-gaap	Net Income Loss NetIncomeLoss	26281000	usd
	us-gaap	Net Income Loss NetIncomeLoss	22027000	usd
CY2023Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	143000	usd
CY2022Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	153000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	423000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	414000	usd
CY2023Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8810000	usd
CY2022Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8305000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	25858000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	21613000	usd
CY2023Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7667981
CY2022Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7605360
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7643086
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7800390
CY2023Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	112449
CY2022Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	102402
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	125662
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	122456
CY2023Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7780430
CY2022Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7707762
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7768748
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7922846
CY2023Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.15
CY2022Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.09
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.38
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.77
CY2023Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.13
CY2022Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.08
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.33
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.73
CY2023Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	64256
CY2022Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	84540
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	55174
CY2023Q3	us-gaap	Banking Regulation Capital Conservation Buffer Capital Conserved Minimum BankingRegulationCapitalConservationBufferCapitalConservedMinimum	0.025	pure
CY2023Q3	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.089	pure
CY2023Q3	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.102	pure
CY2023Q3	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.134	pure
CY2023Q3	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.102	pure
CY2022Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.097	pure
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.107	pure
CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.14	pure
CY2022Q4	us-gaap	Common Equity Tier One Capital Ratio CommonEquityTierOneCapitalRatio	0.107	pure
CY2023Q3	fsbw	Number Of Bank Branches NumberOfBankBranches	27	pure
CY2023Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	30634000	usd
CY2023Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	548000	usd
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	4982000	usd
CY2023Q3	us-gaap	Noninterest Expense NoninterestExpense	23586000	usd
CY2023Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	11482000	usd
CY2023Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2529000	usd
CY2023Q3	us-gaap	Net Income Loss NetIncomeLoss	8953000	usd
CY2023Q3	us-gaap	Assets Average Outstanding AssetsAverageOutstanding	2901386000	usd
CY2022Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	27527000	usd
CY2022Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	1718000	usd
CY2022Q3	us-gaap	Noninterest Income NoninterestIncome	4181000	usd
CY2022Q3	us-gaap	Noninterest Expense NoninterestExpense	19338000	usd
CY2022Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	10652000	usd
CY2022Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2194000	usd
CY2022Q3	us-gaap	Net Income Loss NetIncomeLoss	8458000	usd
CY2022Q3	us-gaap	Assets Average Outstanding AssetsAverageOutstanding	2499982000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	92848000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	3372000	usd
	us-gaap	Noninterest Income NoninterestIncome	15034000	usd
	us-gaap	Noninterest Expense NoninterestExpense	71314000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	33196000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6915000	usd
	us-gaap	Net Income Loss NetIncomeLoss	26281000	usd
	us-gaap	Assets Average Outstanding AssetsAverageOutstanding	2809509000	usd
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	74978000	usd
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	4632000	usd
	us-gaap	Noninterest Income NoninterestIncome	14412000	usd
	us-gaap	Noninterest Expense NoninterestExpense	57334000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27424000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5397000	usd
	us-gaap	Net Income Loss NetIncomeLoss	22027000	usd
	us-gaap	Assets Average Outstanding AssetsAverageOutstanding	2376366000	usd
CY2023Q3	us-gaap	Goodwill Goodwill	3600000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	2300000	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1240000	usd
CY2022Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	812000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3424000	usd
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2380000	usd
CY2023Q3	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	3742000	usd
CY2022Q3	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	3369000	usd
	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	11610000	usd
	us-gaap	Revenue Not From Contract With Customer Excluding Interest Income RevenueNotFromContractWithCustomerExcludingInterestIncome	12032000	usd
CY2023Q3	us-gaap	Noninterest Income NoninterestIncome	4982000	usd
CY2022Q3	us-gaap	Noninterest Income NoninterestIncome	4181000	usd
	us-gaap	Noninterest Income NoninterestIncome	15034000	usd
	us-gaap	Noninterest Income NoninterestIncome	14412000	usd

Files In Submission

Name	View Source	Status
0001437749-23-030868-index-headers.html	Edgar Link	pending
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0001437749-23-030868.txt	Edgar Link	pending
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ex_567396.htm	Edgar Link	pending
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Financial_Report.xlsx	Edgar Link	pending
fsbw-20230930.xsd	Edgar Link	pending
fsbw20230930_10q.htm	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
fsbw-20230930_lab.xml	Edgar Link	unprocessable

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$FSBW
FS Bancorp, Inc. Stock $fsbw

2023 Q4 Form 10-Q Financial Statement

#000143774923030868 Filed on November 08, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FSBW FS Bancorp, Inc. Stock $fsbw

2023 Q4 Form 10-Q Financial Statement

#000143774923030868 Filed on November 08, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FSBW
FS Bancorp, Inc. Stock $fsbw