$SFBC
Sound Financial Bancorp, Inc. Stock $sfbc

$sfbc Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000154111920000056 Filed on November 09, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue		$8.508M	$8.576M
YoY Change		-0.79%	3.65%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin		$1.390M	$1.397M
YoY Change		-0.5%	3.1%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$210.0K	$210.0K	$330.0K
YoY Change	61.54%	-36.36%	-8.33%
% of Gross Profit
Operating Expenses		$1.390M	$1.397M
YoY Change		-0.5%	3.1%
Operating Profit
YoY Change
Interest Expense		$1.848M	$1.930M
YoY Change		-4.25%	36.59%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$4.500M	$2.923M	$1.943M
YoY Change	95.65%	50.44%	-14.59%
Income Tax	$1.000M	$588.0K	$395.0K
% Of Pretax Income	22.22%	20.12%	20.33%
Net Earnings	$3.490M	$2.335M	$1.548M
YoY Change	86.63%	50.84%	-15.41%
Net Earnings / Revenue		27.44%	18.05%
Basic Earnings Per Share		$0.90	$0.61
Diluted Earnings Per Share	$1.337M	$0.90	$0.60
COMMON SHARES
Basic Shares Outstanding	2.595M shares	2.563M shares	2.526M shares
Diluted Shares Outstanding		2.589M shares	2.578M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$193.8M	$115.8M	$58.87M
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	$6.270M	$6.466M	$6.570M
YoY Change	-7.34%	-1.58%	-10.0%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$861.4M	$867.4M	$715.3M
YoY Change	19.66%	21.26%	0.0%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$400.0K	$200.0K	$200.0K
YoY Change	100.0%	0.0%	100.0%
Accrued Expenses	$7.100M	$7.300M	$8.300M
YoY Change	-11.25%	-12.05%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$7.500M	$7.500M	$8.500M
YoY Change	-8.54%	-11.76%	8400.0%
LONG-TERM LIABILITIES
Long-Term Debt	$11.60M	$11.70M	$0.00
YoY Change
Other Long-Term Liabilities	$8.800M	$9.500M	$8.800M
YoY Change	-9.28%	7.95%	0.0%
Total Long-Term Liabilities	$20.40M	$21.20M	$8.800M
YoY Change	110.31%	140.91%	0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$7.500M	$7.500M	$8.500M
Total Long-Term Liabilities	$20.40M	$21.20M	$8.800M
Total Liabilities	$775.9M	$785.0M	$639.3M
YoY Change	20.84%	22.8%	-0.91%
SHAREHOLDERS EQUITY
Retained Earnings	$58.23M	$55.17M	$49.90M
YoY Change	13.26%	10.56%
Common Stock	$25.00K	$25.00K	$25.00K
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$85.48M	$82.33M	$76.02M
YoY Change
Total Liabilities & Shareholders Equity	$861.4M	$867.4M	$715.3M
YoY Change	19.66%	21.26%	0.0%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$3.490M	$2.335M	$1.548M
YoY Change	86.63%	50.84%	-15.41%
Depreciation, Depletion And Amortization	$210.0K	$210.0K	$330.0K
YoY Change	61.54%	-36.36%	-8.33%
Cash From Operating Activities	$9.110M	-$7.070M	$2.880M
YoY Change	137.24%	-345.49%	-27.09%
INVESTING ACTIVITIES
Capital Expenditures	-$10.00K	$0.00	-$120.0K
YoY Change	-97.62%	-100.0%	200.0%
Acquisitions
YoY Change
Other Investing Activities	$77.52M	-$1.280M	-$50.62M
YoY Change	-1001.4%	-97.47%	91.89%
Cash From Investing Activities	$77.52M	-$1.280M	-$50.74M
YoY Change	-958.47%	-97.48%	92.12%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-8.550M	-6.420M	26.31M
YoY Change	-511.06%	-124.4%	3.95%
NET CHANGE
Cash From Operating Activities	9.110M	-7.070M	2.880M
Cash From Investing Activities	77.52M	-1.280M	-50.74M
Cash From Financing Activities	-8.550M	-6.420M	26.31M
Net Change In Cash	78.08M	-14.77M	-21.55M
YoY Change	-2610.61%	-31.46%	-856.14%
FREE CASH FLOW
Cash From Operating Activities	$9.110M	-$7.070M	$2.880M
Capital Expenditures	-$10.00K	$0.00	-$120.0K
Free Cash Flow	$9.120M	-$7.070M	$3.000M
YoY Change	114.08%	-335.67%	-24.81%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001541119
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-35633
	dei	Entity Registrant Name EntityRegistrantName	Sound Financial Bancorp, Inc.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	45-5188530
	dei	Entity Address Address Line1 EntityAddressAddressLine1	2400 3rd Avenue,
	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 150,
	dei	Entity Address City Or Town EntityAddressCityOrTown	Seattle,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98121
	dei	City Area Code CityAreaCode	206
	dei	Local Phone Number LocalPhoneNumber	448-0884
	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
	dei	Trading Symbol TradingSymbol	SFBC
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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	us-gaap	Noninterest Expense NoninterestExpense	16882000	USD
	us-gaap	Noninterest Expense NoninterestExpense	17146000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6833000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	6030000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	2923000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	1943000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	588000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	395000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1390000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1221000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2335000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	1548000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5443000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4809000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.90
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.11
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.90
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2563018	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2526240	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2558475	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2521393	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2589241	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2578287	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2588101	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2572499	shares
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2335000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	1548000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5443000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4809000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-3000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	106000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	90000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	22000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	19000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	84000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	71000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2332000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1546000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5527000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4880000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	80235000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2335000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	52000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	389000	USD
CY2020Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	0	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	23000	USD
CY2020Q3	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	77000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	82330000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	77726000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5443000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	84000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	283000	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.65
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1683000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	0	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2019Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	0	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	239000	USD
	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	238000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	82330000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	74565000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	1548000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2000	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	72000	USD
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.14
CY2019Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	359000	USD
CY2019Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	93000	USD
CY2019Q3	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	99000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-104000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	76016000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	71627000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4809000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	71000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	159000	USD
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.42
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1075000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	0	USD
	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	131000	USD
	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	294000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	76016000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5443000	USD
	us-gaap	Net Income Loss NetIncomeLoss	4809000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-27000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	925000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-150000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	696000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	799000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	283000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	159000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	1423000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	576000	USD
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	696000	USD
	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	756000	USD
	sfbc	Bank Owned Life Insurance Increase In Cash Surrender Value BankOwnedLifeInsuranceIncreaseInCashSurrenderValue	207000	USD
	sfbc	Bank Owned Life Insurance Increase In Cash Surrender Value BankOwnedLifeInsuranceIncreaseInCashSurrenderValue	267000	USD
	sfbc	Increase Decreasein Borrowers Advance Paymentsfor Taxesand Insurance IncreaseDecreaseinBorrowersAdvancePaymentsforTaxesandInsurance	373000	USD
	sfbc	Increase Decreasein Borrowers Advance Paymentsfor Taxesand Insurance IncreaseDecreaseinBorrowersAdvancePaymentsforTaxesandInsurance	514000	USD
	sfbc	Gain Losson Salesof Loans Net Excluding Fair Value Changein Mortgage Servicing Rights GainLossonSalesofLoansNetExcludingFairValueChangeinMortgageServicingRights	3399000	USD
	sfbc	Gain Losson Salesof Loans Net Excluding Fair Value Changein Mortgage Servicing Rights GainLossonSalesofLoansNetExcludingFairValueChangeinMortgageServicingRights	1000000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	179244000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	54430000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	193892000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-11000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	54683000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	330000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-81000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-314000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-859000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-13000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	75000	USD
	sfbc	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-662000	USD
	sfbc	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	-656000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-585000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	883000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-9587000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7223000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	7177000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	3066000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	3190000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	245000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	68622000	USD
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-6694000	USD
	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	14000	USD
	us-gaap	Payments For Proceeds From Life Insurance Policies PaymentsForProceedsFromLifeInsurancePolicies	402000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	396000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	227000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-73019000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	3244000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	132132000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	56020000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	87991000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	91225000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	87991000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	162775000	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	11676000	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
	sfbc	Paymentsfor Proceedsfrom Federal Home Loan Bank Stock Financing Activities PaymentsforProceedsfromFederalHomeLoanBankStockFinancingActivities	-4000	USD
	sfbc	Paymentsfor Proceedsfrom Federal Home Loan Bank Stock Financing Activities PaymentsforProceedsfromFederalHomeLoanBankStockFinancingActivities	2776000	USD
	us-gaap	Proceeds From Repayment Of Loans By Employee Stock Ownership Plans ProceedsFromRepaymentOfLoansByEmployeeStockOwnershipPlans	238000	USD
	us-gaap	Proceeds From Repayment Of Loans By Employee Stock Ownership Plans ProceedsFromRepaymentOfLoansByEmployeeStockOwnershipPlans	294000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1683000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1075000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	239000	USD
	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	131000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	142598000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-13404000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	59992000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-2937000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	55770000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	61810000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	115762000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	58873000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1270000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	425000	USD
	us-gaap	Interest Paid Net InterestPaidNet	5591000	USD
	us-gaap	Interest Paid Net InterestPaidNet	5516000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	494000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	8136000	USD
	sfbc	Lease Liability Obtainedin Exchangefor Operating Lease Liability LeaseLiabilityObtainedinExchangeforOperatingLeaseLiability	0	USD
	sfbc	Lease Liability Obtainedin Exchangefor Operating Lease Liability LeaseLiabilityObtainedinExchangeforOperatingLeaseLiability	8408000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	12968000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	331000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	3000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	13296000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	9085000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	229000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	8000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	9306000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	3014000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	3016000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	489000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	506000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	1426000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	1479000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	2107000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	2228000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	5932000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	6067000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	12968000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	13296000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	0	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Restricted DebtSecuritiesAvailableForSaleRestricted	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2019Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	2152000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	2152000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	3000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	3387000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	8000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	3387000	USD
CY2020Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	0	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	8000	USD
CY2019Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	13300000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	9300000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	4	security
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	security
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	5	security
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	0	security
CY2020Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	692749000	USD
CY2019Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	621907000	USD
CY2020Q3	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	3315000	USD
CY2019Q4	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	2020000	USD
CY2020Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	689434000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	619887000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5988000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5640000	USD
CY2020Q3	us-gaap	Notes Receivable Net NotesReceivableNet	683446000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	614247000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	446000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	5542000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5988000	USD
CY2020Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	9118000	USD
CY2020Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	683631000	USD
CY2020Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	692749000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	724000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	4916000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5640000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	12393000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	609514000	USD
CY2019Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	621907000	USD
CY2020Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	6031000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	332000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	14000	USD
CY2020Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	275000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5988000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5640000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	649000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	72000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	925000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5988000	USD
CY2019Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5370000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	9000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	7000	USD
CY2019Q3	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	250000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5618000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5774000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	41000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	35000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-150000	USD
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	5618000	USD
CY2020Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	692749000	USD
CY2019Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	621907000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3316000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	4657000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	7268000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	685481000	USD
CY2020Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	692749000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	795000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	11466000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	610441000	USD
CY2019Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	621907000	USD
CY2020Q3	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	692749000	USD
CY2019Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	621907000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	9174000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	7036000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2082000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	9118000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	446000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	12526000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	10072000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2321000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	12393000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	724000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	9100000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	140000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	7937000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	96000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	10084000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	325000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	8148000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	216000	USD
CY2020Q3	us-gaap	Financing Receivable Accrued Interest Writeoff FinancingReceivableAccruedInterestWriteoff	62000	USD
	us-gaap	Financing Receivable Accrued Interest Writeoff FinancingReceivableAccruedInterestWriteoff	126000	USD
CY2019Q3	us-gaap	Financing Receivable Accrued Interest Writeoff FinancingReceivableAccruedInterestWriteoff	74000	USD
	us-gaap	Financing Receivable Accrued Interest Writeoff FinancingReceivableAccruedInterestWriteoff	165000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5600000	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	7900000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	security
CY2020Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	146000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4	security
CY2020Q3	sfbc	Financing Receivable Modifications Subsequent Payment Number Of Contracts FinancingReceivableModificationsSubsequentPaymentNumberOfContracts	1	security
CY2020Q3	sfbc	Financing Receivable Modifications Investment Paid Off FinancingReceivableModificationsInvestmentPaidOff	161000	USD
	sfbc	Financing Receivable Modifications Subsequent Payment Number Of Contracts FinancingReceivableModificationsSubsequentPaymentNumberOfContracts	2	security
	sfbc	Financing Receivable Modifications Investment Paid Off FinancingReceivableModificationsInvestmentPaidOff	2900000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4	security
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	4	security
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5100000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5100000	USD
CY2019Q3	sfbc	Financing Receivable Modifications Subsequent Payment Number Of Contracts FinancingReceivableModificationsSubsequentPaymentNumberOfContracts	0	security
	sfbc	Financing Receivable Modifications Subsequent Payment Number Of Contracts FinancingReceivableModificationsSubsequentPaymentNumberOfContracts	3	security
	sfbc	Financing Receivable Modifications Investment Paid Off FinancingReceivableModificationsInvestmentPaidOff	145000	USD
CY2020Q3	sfbc	Financing Receivable Modifications Post Modification Changes For Unpaid Principal Balance In Loans Modified As Td Rs Within Previous12 Months Number Of Contracts FinancingReceivableModificationsPostModificationChangesForUnpaidPrincipalBalanceInLoansModifiedAsTDRsWithinPrevious12MonthsNumberOfContracts	0	security
	sfbc	Financing Receivable Modifications Post Modification Changes For Unpaid Principal Balance In Loans Modified As Td Rs Within Previous12 Months Number Of Contracts FinancingReceivableModificationsPostModificationChangesForUnpaidPrincipalBalanceInLoansModifiedAsTDRsWithinPrevious12MonthsNumberOfContracts	0	security
	sfbc	Financing Receivable Modifications Post Modification Changes For Unpaid Principal Balance In Loans Modified As Td Rs Within Previous12 Months Number Of Contracts FinancingReceivableModificationsPostModificationChangesForUnpaidPrincipalBalanceInLoansModifiedAsTDRsWithinPrevious12MonthsNumberOfContracts	0	security
CY2019Q3	sfbc	Financing Receivable Modifications Post Modification Changes For Unpaid Principal Balance In Loans Modified As Td Rs Within Previous12 Months Number Of Contracts FinancingReceivableModificationsPostModificationChangesForUnpaidPrincipalBalanceInLoansModifiedAsTDRsWithinPrevious12MonthsNumberOfContracts	0	security
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	security
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	161000	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	1	security
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	97000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	USD
CY2020Q3	us-gaap	Principal Amount Outstanding Of Loans Held In Portfolio PrincipalAmountOutstandingOfLoansHeldInPortfolio	444300000	USD
CY2019Q4	us-gaap	Principal Amount Outstanding Of Loans Held In Portfolio PrincipalAmountOutstandingOfLoansHeldInPortfolio	377300000	USD
CY2020Q2	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3113000	USD
CY2019Q2	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3205000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3239000	USD
CY2018Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3414000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	849000	USD
CY2019Q3	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	111000	USD
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	1523000	USD
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	388000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-623000	USD
CY2019Q3	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-90000	USD
	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-1423000	USD
	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-576000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3339000	USD
CY2019Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3226000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3339000	USD
CY2019Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3226000	USD
	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed	2.44
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeed	1.87
	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Life1 ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1	P5Y2M12D
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Life1 ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1	P6Y2M12D
	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.101
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.125
CY2020Q3	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	260000	USD
	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	739000	USD
CY2019Q3	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	259000	USD
	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	756000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0305
CY2020Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Average Interest Rate Of Amounts Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate	0.0305
CY2019Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1200000	USD
CY2020Q3	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	1200000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	159000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2319000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1548000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5407000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4809000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2563000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2526000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2558000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	2521000	shares
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	26000	shares
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	52000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	30000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	51000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2589000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2578000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2588000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	2572000	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.90
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.11
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.90
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.09
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	19281	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
	sfbc	Share Based Compensation Arrangement By Share Based Payment Award Number Of Existing Equity Incentive Plans ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfExistingEquityIncentivePlans	1	loan
CY2020Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	52000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	283000	USD
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	72000	USD
CY2020Q3	sfbc	Loan Fees LoanFees	72000	USD
CY2019Q3	sfbc	Loan Fees LoanFees	59000	USD
	sfbc	Loan Fees LoanFees	183000	USD
	sfbc	Loan Fees LoanFees	163000	USD
CY2020Q3	sfbc	Other Fees OtherFees	15000	USD
CY2019Q3	sfbc	Other Fees OtherFees	16000	USD
	sfbc	Other Fees OtherFees	46000	USD
	sfbc	Other Fees OtherFees	44000	USD
CY2020Q3	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	510000	USD
CY2019Q3	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	512000	USD
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	1433000	USD
	us-gaap	Investment Banking Advisory Brokerage And Underwriting Fees And Commissions InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions	1437000	USD
CY2020Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	102000	USD
CY2019Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	81000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	207000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	267000	USD
CY2020Q3	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	260000	USD
CY2019Q3	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	259000	USD
	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	739000	USD
	sfbc	Feesand Commissions Mortgage Bankingand Servicing Income Loss FeesandCommissionsMortgageBankingandServicingIncomeLoss	756000	USD
CY2020Q3	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	623000	USD
CY2019Q3	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	90000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	1423000	USD
	us-gaap	Mortgage Servicing Rights Msr Impairment Recovery MortgageServicingRightsMSRImpairmentRecovery	576000	USD
CY2020Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1819000	USD
CY2019Q3	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	305000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	3399000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1000000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	2068000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	1067000	USD
	us-gaap	Noninterest Income NoninterestIncome	4355000	USD
	us-gaap	Noninterest Income NoninterestIncome	2884000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
CY2020Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	0	USD
CY2019Q3	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1000	USD
	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-11000	USD
	sfbc	Lessee Operating Lease Number Of Renewal Options LesseeOperatingLeaseNumberOfRenewalOptions	1	renewal_option
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	7348000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	6945000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	7641000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	8010000	USD
CY2020Q3	us-gaap	Sublease Income SubleaseIncome	3000	USD
CY2019Q3	us-gaap	Sublease Income SubleaseIncome	3000	USD
	us-gaap	Sublease Income SubleaseIncome	9000	USD
	us-gaap	Sublease Income SubleaseIncome	9000	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	270000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	308000	USD
	us-gaap	Lease Cost LeaseCost	888000	USD
	us-gaap	Lease Cost LeaseCost	922000	USD

Files In Submission

Name	View Source	Status
0001541119-20-000056-index-headers.html	Edgar Link	pending
0001541119-20-000056-index.html	Edgar Link	pending
0001541119-20-000056.txt	Edgar Link	pending
0001541119-20-000056-xbrl.zip	Edgar Link	pending
ex-311q32020.htm	Edgar Link	pending
ex-312q32020.htm	Edgar Link	pending
ex-32q32020.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R6.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
sfbc-20200930.htm	Edgar Link	pending
sfbc-20200930.xsd	Edgar Link	pending
sfbc-20200930_cal.xml	Edgar Link	unprocessable
sfbc-20200930_def.xml	Edgar Link	unprocessable
sfbc-20200930_htm.xml	Edgar Link	completed
sfbc-20200930_lab.xml	Edgar Link	unprocessable
sfbc-20200930_pre.xml	Edgar Link	unprocessable
Show.js	Edgar Link	pending

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$SFBC
Sound Financial Bancorp, Inc. Stock $sfbc

2020 Q4 Form 10-Q Financial Statement

#000154111920000056 Filed on November 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SFBC Sound Financial Bancorp, Inc. Stock $sfbc

2020 Q4 Form 10-Q Financial Statement

#000154111920000056 Filed on November 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SFBC
Sound Financial Bancorp, Inc. Stock $sfbc