$FFNW
First Financial Northwest, Inc. Stock $ffnw

$ffnw Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000093905720000420 Filed on November 09, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue		$1.011M	$1.039M
YoY Change		-2.69%	23.54%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$530.0K	$540.0K	$470.0K
YoY Change	3.92%	14.89%	11.9%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$3.606M	$5.566M
YoY Change		-35.21%	45.36%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$3.270M	$2.532M	$3.136M
YoY Change	0.62%	-19.26%	-10.37%
Income Tax	$620.0K	$450.0K	$630.0K
% Of Pretax Income	18.96%	17.77%	20.09%
Net Earnings	$2.650M	$2.082M	$2.505M
YoY Change	1.15%	-16.89%	-10.28%
Net Earnings / Revenue		205.93%	241.1%
Basic Earnings Per Share		$0.22	$0.25
Diluted Earnings Per Share	$276.0K	$0.21	$0.25
COMMON SHARES
Basic Shares Outstanding	9.786M shares	9.661M shares	9.902M shares
Diluted Shares Outstanding		9.676M shares	9.991M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$80.49M	$26.11M	$13.72M
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	$22.58M	$22.41M	$22.35M
YoY Change	0.5%	0.28%	5.02%
Goodwill	$889.0K	$889.0K	$889.0K
YoY Change	0.0%	0.0%	0.0%
Intangibles	$824.0K	$860.0K	$1.005M
YoY Change	-14.88%	-14.43%	-12.84%
Long-Term Investments
YoY Change
Other Assets	$1.600M	$1.900M	$1.200M
YoY Change	6.67%	58.33%	-42.86%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.388B	$1.365B	$1.308B
YoY Change	3.41%	4.37%	5.95%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$200.0K	$200.0K	$400.0K
YoY Change	-33.33%	-50.0%	-20.0%
Accrued Expenses	$3.800M	$3.900M
YoY Change	65.22%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$4.000M	$4.100M	$400.0K
YoY Change	53.85%	925.0%	-20.0%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$11.20M	$12.10M	$10.00M
YoY Change	27.27%	21.0%	4.17%
Total Long-Term Liabilities	$11.20M	$12.10M	$10.00M
YoY Change	27.27%	21.0%	4.17%
TOTAL LIABILITIES
Total Short-Term Liabilities	$4.000M	$4.100M	$400.0K
Total Long-Term Liabilities	$11.20M	$12.10M	$10.00M
Total Liabilities	$1.231B	$1.211B	$1.153B
YoY Change	3.86%	4.98%	6.77%
SHAREHOLDERS EQUITY
Retained Earnings	$78.00M	$76.30M	$71.59M
YoY Change	6.39%	6.58%	10.13%
Common Stock	$97.00K	$99.00K	$103.0K
YoY Change	-5.83%	-3.88%	-5.5%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$156.3M	$154.8M	$155.1M
YoY Change
Total Liabilities & Shareholders Equity	$1.388B	$1.365B	$1.308B
YoY Change	3.41%	4.37%	5.95%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$2.650M	$2.082M	$2.505M
YoY Change	1.15%	-16.89%	-10.28%
Depreciation, Depletion And Amortization	$530.0K	$540.0K	$470.0K
YoY Change	3.92%	14.89%	11.9%
Cash From Operating Activities	$2.180M	$5.020M	$6.710M
YoY Change	-10.66%	-25.19%	126.69%
INVESTING ACTIVITIES
Capital Expenditures	-$700.0K	-$720.0K	-$870.0K
YoY Change	11.11%	-17.24%	234.62%
Acquisitions
YoY Change
Other Investing Activities	$31.71M	$6.810M	-$27.81M
YoY Change	-229.8%	-124.49%	288.41%
Cash From Investing Activities	$31.01M	$6.080M	-$28.68M
YoY Change	-223.74%	-121.2%	286.52%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	21.19M	-58.93M	4.990M
YoY Change	-33.55%	-1280.96%	-34.86%
NET CHANGE
Cash From Operating Activities	2.180M	5.020M	6.710M
Cash From Investing Activities	31.01M	6.080M	-28.68M
Cash From Financing Activities	21.19M	-58.93M	4.990M
Net Change In Cash	54.38M	-47.83M	-16.98M
YoY Change	486.62%	181.68%	-630.62%
FREE CASH FLOW
Cash From Operating Activities	$2.180M	$5.020M	$6.710M
Capital Expenditures	-$700.0K	-$720.0K	-$870.0K
Free Cash Flow	$2.880M	$5.740M	$7.580M
YoY Change	-6.19%	-24.27%	135.4%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Registrant Name EntityRegistrantName	FIRST FINANCIAL NORTHWEST, INC.
	dei	Entity Central Index Key EntityCentralIndexKey	0001401564
	dei	Document Type DocumentType	10-Q
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	9785866	shares
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Small Business EntitySmallBusiness	true
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
	dei	Entity Shell Company EntityShellCompany	false
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	City Area Code CityAreaCode	(425)
	dei	Local Phone Number LocalPhoneNumber	255-4400
	dei	Entity Address Address Line1 EntityAddressAddressLine1	201 Wells Avenue South
	dei	Entity Address City Or Town EntityAddressCityOrTown	Renton
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98057
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Entity File Number EntityFileNumber	001-33652
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	26-0610707
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WA
	dei	Document Transition Report DocumentTransitionReport	false
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	dei	Entity Address Address Line1 EntityAddressAddressLine1	201 Wells Avenue South
	dei	Entity Address City Or Town EntityAddressCityOrTown	Renton
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98057
	dei	City Area Code CityAreaCode	(425)
	dei	Local Phone Number LocalPhoneNumber	255-4400
	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
	dei	Trading Symbol TradingSymbol	FFNW
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	29820000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	29210000	USD
CY2020Q3	ffnw	Recaptureof Provisionfor Loanand Lease Losses RecaptureofProvisionforLoanandLeaseLosses	-700000	USD
CY2019Q3	ffnw	Recaptureof Provisionfor Loanand Lease Losses RecaptureofProvisionforLoanandLeaseLosses	-100000	USD
	ffnw	Recaptureof Provisionfor Loanand Lease Losses RecaptureofProvisionforLoanandLeaseLosses	-1300000	USD
	ffnw	Recaptureof Provisionfor Loanand Lease Losses RecaptureofProvisionforLoanandLeaseLosses	300000	USD
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9388000	USD
CY2019Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	9552000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	28520000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	29510000	USD
CY2020Q3	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	18000	USD
CY2019Q3	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	88000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	86000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	80000	USD
CY2020Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	269000	USD
CY2019Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	235000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	778000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	693000	USD
CY2020Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	145000	USD
CY2019Q3	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	245000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	493000	USD
	us-gaap	Brokerage Commissions Revenue BrokerageCommissionsRevenue	702000	USD
CY2020Q3	ffnw	Deposit Fees DepositFees	201000	USD
CY2019Q3	ffnw	Deposit Fees DepositFees	179000	USD
	ffnw	Deposit Fees DepositFees	560000	USD
	ffnw	Deposit Fees DepositFees	555000	USD
CY2020Q3	ffnw	Loan Revenue LoanRevenue	376000	USD
CY2019Q3	ffnw	Loan Revenue LoanRevenue	290000	USD
	ffnw	Loan Revenue LoanRevenue	865000	USD
	ffnw	Loan Revenue LoanRevenue	562000	USD
CY2020Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	2000	USD
CY2019Q3	us-gaap	Noninterest Income Other NoninterestIncomeOther	2000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	7000	USD
	us-gaap	Noninterest Income Other NoninterestIncomeOther	26000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	1011000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	1039000	USD
	us-gaap	Noninterest Income NoninterestIncome	2789000	USD
	us-gaap	Noninterest Income NoninterestIncome	2618000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4880000	USD
CY2019Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	4813000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	14893000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	14547000	USD
CY2020Q3	us-gaap	Occupancy Net OccupancyNet	987000	USD
CY2019Q3	us-gaap	Occupancy Net OccupancyNet	924000	USD
	us-gaap	Occupancy Net OccupancyNet	3090000	USD
	us-gaap	Occupancy Net OccupancyNet	2688000	USD
CY2020Q3	us-gaap	Professional Fees ProfessionalFees	371000	USD
CY2019Q3	us-gaap	Professional Fees ProfessionalFees	440000	USD
	us-gaap	Professional Fees ProfessionalFees	1257000	USD
	us-gaap	Professional Fees ProfessionalFees	1262000	USD
CY2020Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	731000	USD
CY2019Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	478000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2112000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1393000	USD
CY2020Q3	ffnw	Foreclosed Real Estate Recovery Expense Net ForeclosedRealEstateRecoveryExpenseNet	1000	USD
CY2019Q3	ffnw	Foreclosed Real Estate Recovery Expense Net ForeclosedRealEstateRecoveryExpenseNet	1000	USD
	ffnw	Foreclosed Real Estate Recovery Expense Net ForeclosedRealEstateRecoveryExpenseNet	7000	USD
	ffnw	Foreclosed Real Estate Recovery Expense Net ForeclosedRealEstateRecoveryExpenseNet	33000	USD
CY2020Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	134000	USD
CY2019Q3	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	13000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	405000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	286000	USD
CY2020Q3	us-gaap	General Insurance Expense GeneralInsuranceExpense	116000	USD
CY2019Q3	us-gaap	General Insurance Expense GeneralInsuranceExpense	95000	USD
	us-gaap	General Insurance Expense GeneralInsuranceExpense	339000	USD
	us-gaap	General Insurance Expense GeneralInsuranceExpense	288000	USD
CY2020Q3	us-gaap	Marketing Expense MarketingExpense	41000	USD
CY2019Q3	us-gaap	Marketing Expense MarketingExpense	118000	USD
	us-gaap	Marketing Expense MarketingExpense	133000	USD
	us-gaap	Marketing Expense MarketingExpense	280000	USD
CY2020Q3	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	606000	USD
CY2019Q3	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	573000	USD
	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	1843000	USD
	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	1670000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	7867000	USD
CY2019Q3	us-gaap	Noninterest Expense NoninterestExpense	7455000	USD
	us-gaap	Noninterest Expense NoninterestExpense	24079000	USD
	us-gaap	Noninterest Expense NoninterestExpense	22447000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2532000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	3136000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	7230000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	9681000	USD
CY2020Q3	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	450000	USD
CY2019Q3	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	631000	USD
	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1320000	USD
	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	1927000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2082000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	2505000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5910000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7754000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.60
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.77
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9661498	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9901586	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9788397	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9989970	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9675567	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9991011	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9811602	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10091631	shares
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2082000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	2505000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5910000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7754000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	538000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	662000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2031000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	3062000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	113000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	139000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	427000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	643000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	18000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	88000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	86000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	80000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	4000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	18000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	18000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	17000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	343000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-237000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-4264000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-1449000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	72000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-50000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-896000	USD
	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-304000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	682000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	266000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1832000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1211000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2764000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2771000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4078000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	8965000	USD
CY2019Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10375325	shares
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	153828000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	2505000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	267000	USD
CY2019Q3	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	8580	shares
CY2019Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	226000	USD
CY2019Q3	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	28214	shares
CY2019Q3	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	402000	USD
CY2019Q3	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	87852	shares
CY2019Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1237000	USD
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.09
CY2019Q3	us-gaap	Dividends Common Stock DividendsCommonStock	889000	USD
CY2019Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10296053	shares
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	155102000	USD
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10710656	shares
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	153738000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7754000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1211000	USD
	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	25278	shares
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-93000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	457000	USD
	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	84640	shares
	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	1290000	USD
	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	433952	shares
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	6750000	USD
	ffnw	Stock Canceled During Period Shares Restricted Stock Award Gross StockCanceledDuringPeriodSharesRestrictedStockAwardGross	5929	shares
	ffnw	Stock Canceled During Period Value Restricted Stock Award Gross StockCanceledDuringPeriodValueRestrictedStockAwardGross	0	USD
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.26
	us-gaap	Dividends Common Stock DividendsCommonStock	2592000	USD
	ffnw	Reclassification To Accumulated Other Comprehensive Tax Rate Change ReclassificationToAccumulatedOtherComprehensiveTaxRateChange	87000	USD
CY2019Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10296053	shares
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	155102000	USD
CY2020Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10048961	shares
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	153976000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2082000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	682000	USD
CY2020Q3	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	17695	shares
CY2020Q3	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	224000	USD
CY2020Q3	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	28214	shares
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	261000	USD
CY2020Q3	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	155049	shares
CY2020Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	1484000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	963000	USD
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	9911607	shares
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	154778000	USD
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	10252953	shares
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	156319000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5910000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1832000	USD
	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	33923	shares
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-73000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	367000	USD
	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	84642	shares
	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Employee Stock Purchase Program Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationEmployeeStockPurchaseProgramRequisiteServicePeriodRecognition	904000	USD
	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	369894	shares
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	3886000	USD
	ffnw	Stock Canceled During Period Shares Restricted Stock Award Gross StockCanceledDuringPeriodSharesRestrictedStockAwardGross	5375	shares
	ffnw	Stock Canceled During Period Value Restricted Stock Award Gross StockCanceledDuringPeriodValueRestrictedStockAwardGross	0	USD
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.30
	us-gaap	Dividends Common Stock DividendsCommonStock	2931000	USD
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	9911607	shares
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	154778000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5910000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7754000	USD
	ffnw	Recaptureof Provisionfor Loanand Lease Losses RecaptureofProvisionforLoanandLeaseLosses	-1300000	USD
	ffnw	Recaptureof Provisionfor Loanand Lease Losses RecaptureofProvisionforLoanandLeaseLosses	300000	USD
	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	0	USD
	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	29000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-589000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	-626000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	86000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	80000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1638000	USD
	us-gaap	Depreciation Nonproduction DepreciationNonproduction	1330000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	0	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-5000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	110000	USD
	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	320000	USD
	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	904000	USD
	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1290000	USD
	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	367000	USD
	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	457000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	778000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	693000	USD
	ffnw	Change In Annuity Value ChangeInAnnuityValue	31000	USD
	ffnw	Change In Annuity Value ChangeInAnnuityValue	0	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-194000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	636000	USD
	ffnw	Increase Decrease In Rightof Use Asset IncreaseDecreaseInRightofUseAsset	-491000	USD
	ffnw	Increase Decrease In Rightof Use Asset IncreaseDecreaseInRightofUseAsset	-367000	USD
	ffnw	Increase Decreasein Advance Paymentsfor Taxesand Insurance IncreaseDecreaseinAdvancePaymentsforTaxesandInsurance	1821000	USD
	ffnw	Increase Decreasein Advance Paymentsfor Taxesand Insurance IncreaseDecreaseinAdvancePaymentsforTaxesandInsurance	2110000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	1538000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	339000	USD
	ffnw	Increase Decrease In Lease Liability IncreaseDecreaseInLeaseLiability	-453000	USD
	ffnw	Increase Decrease In Lease Liability IncreaseDecreaseInLeaseLiability	-341000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-88000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-96000	USD
	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-558000	USD
	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-1164000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9792000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	10639000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	12082000	USD
	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	5057000	USD
	ffnw	Principal Repaymentson Investments Availablefor Sale PrincipalRepaymentsonInvestmentsAvailableforSale	8991000	USD
	ffnw	Principal Repaymentson Investments Availablefor Sale PrincipalRepaymentsonInvestmentsAvailableforSale	4859000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	9050000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	3534000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	2375000	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	26822000	USD
	us-gaap	Increase Decrease In Finance Receivables IncreaseDecreaseInFinanceReceivables	60646000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-599000	USD
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	-969000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1581000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2350000	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	310000	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	70000	USD
	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	1457000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-18226000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-56792000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	36148000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	77796000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	248000000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Advances ProceedsFromFederalHomeLoanBankAdvances	196500000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	265700000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	222000000	USD
	ffnw	Net Settlementof Stock Awards NetSettlementofStockAwards	73000	USD
	ffnw	Net Settlementof Stock Awards NetSettlementofStockAwards	93000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3886000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	6750000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	2931000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	2592000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	11558000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	42861000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	3124000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-3292000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	22990000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	17010000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	26114000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	13718000	USD
	us-gaap	Interest Paid Net InterestPaidNet	12540000	USD
	us-gaap	Interest Paid Net InterestPaidNet	15540000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1190000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1860000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	1945000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2982000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-4264000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-1449000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	2116000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1853000	USD
	ffnw	Initial Recognitionof Lease Liability InitialRecognitionofLeaseLiability	2116000	USD
	ffnw	Initial Recognitionof Lease Liability InitialRecognitionofLeaseLiability	1853000	USD
	us-gaap	Nature Of Operations NatureOfOperations	Description of Business<div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">First Financial Northwest, Inc. (“First Financial Northwest”), a Washington corporation, was formed on June 1, 2007 for the purpose of becoming the holding company for First Financial Northwest Bank (the “Bank”) in connection with the conversion from a mutual holding company structure to a stock holding company structure completed on October 9, 2007. First Financial Northwest’s business activities generally are limited to passive investment activities and oversight of its investment in First Financial Northwest Bank. Accordingly, the information presented in the consolidated financial statements and accompanying data, relates primarily to First Financial Northwest Bank. First Financial Northwest is a bank holding company, having converted from a savings and loan holding company on March 31, 2015, and as a bank holding company is subject to regulation by the Federal Reserve Bank of San Francisco. First Financial Northwest Bank is regulated by the Federal Deposit Insurance Corporation (“FDIC”) and the Washington State Department of Financial Institutions (“DFI”).</span></div><div style="text-align:justify;text-indent:36pt"><span><br/></span></div><div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">At September 30, 2020, First Financial Northwest Bank operated in thirteen locations in Washington with the headquarters and six retail branch locations in King County, five retail branch locations in Snohomish County and one retail branch in Pierce County. On October 5, 2020, the Bank opened a new branch in Gig Harbor, Washington, located in Pierce County. In addition, the Bank has received FDIC approval to open a new branch in Issaquah, Washington, located in King County, which is expected to open in early 2021. The Bank’s primary market area consists of King, Snohomish, Pierce and Kitsap counties, Washington. </span></div><div style="text-align:justify;text-indent:36pt"><span><br/></span></div><div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Bank is a portfolio lender, originating and purchasing one-to-four family residential, multifamily, commercial real estate, construction/land development, business, and consumer loans. Loans are primarily funded by deposits from the general public, supplemented by borrowings from the FHLB and deposits raised in the national brokered deposit market.</span></div><div style="text-align:justify;text-indent:36pt"><span><br/></span></div><div style="text-align:justify;text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As used throughout this report, the terms “we,” “our,” “us,” or the “Company” refer to First Financial Northwest, Inc. and its consolidated subsidiary First Financial Northwest Bank, unless the context otherwise requires.</span></div>
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	124768000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2491000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1239000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	126020000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	137294000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1087000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1780000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	136601000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	7553000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	63000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	44310000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1176000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	51863000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	1239000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	28858000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	360000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	57572000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1420000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	86430000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	1780000	USD
CY2020Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	23	securities
CY2019Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	37	securities
CY2019Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	18	securities
CY2020Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	18	securities
CY2020Q3	ffnw	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged As Percent Of Public Deposits Held FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledgedAsPercentOfPublicDepositsHeld	0.50
CY2020Q3	ffnw	Investments Pledged As Collateral For Public Deposits InvestmentsPledgedAsCollateralForPublicDeposits	21200000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	0	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	8993000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	8947000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	15227000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	15318000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	53617000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	53459000	USD
CY2020Q3	ffnw	Debt Securities Amortized Cost Total DebtSecuritiesAmortizedCostTotal	77837000	USD
CY2020Q3	ffnw	Schedule Of Available For Sale Securities Debt Maturities ScheduleOfAvailableForSaleSecuritiesDebtMaturities	77724000	USD
CY2020Q3	ffnw	Mortgage Backed Investments Amortized Cost MortgageBackedInvestmentsAmortizedCost	46931000	USD
CY2020Q3	us-gaap	Mortgage Backed Securities Available For Sale Fair Value Disclosure MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure	48296000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	124768000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	126020000	USD
CY2019Q4	ffnw	Investments Pledged As Collateral For Public Deposits InvestmentsPledgedAsCollateralForPublicDeposits	19000000.0	USD
CY2020Q3	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2500000	USD
CY2020Q3	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	18000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	12000000.0	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	86000	USD
CY2019Q3	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	2000000.0	USD
CY2019Q3	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	88000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	5100000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	80000	USD
CY2020Q1	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	2400000	USD
CY2020Q3	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	1150481000	USD
CY2019Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	1122238000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	1929000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	558000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	14568000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	13218000	USD
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	11000	USD
CY2019Q3	ffnw	Troubled Debt Restructuring Charge To Allowance For Loan And Lease Losses TroubledDebtRestructuringChargeToAllowanceForLoanAndLeaseLosses	0	USD
	ffnw	Troubled Debt Restructuring Charge To Allowance For Loan And Lease Losses TroubledDebtRestructuringChargeToAllowanceForLoanAndLeaseLosses	0	USD
CY2020Q3	ffnw	Number Of Delinquent Loans With Expired Deferral Periods NumberOfDelinquentLoansWithExpiredDeferralPeriods	0	loan
CY2020Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1133984000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1108462000	USD
CY2020Q3	us-gaap	Notes Receivable Net NotesReceivableNet	1150481000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	1122238000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Ratio Of Nonperforming Loans To All Loans LoansAndLeasesReceivableRatioOfNonperformingLoansToAllLoans	0.0019
CY2020Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2020Q3	ffnw	Nonaccrual Loans Total NonaccrualLoansTotal	2104000	USD
CY2019Q4	ffnw	Nonaccrual Loans Total NonaccrualLoansTotal	95000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	24000	USD
	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	58000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Impaired Interest Lost On Nonaccrual Loans LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans	2000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	3100000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	15650000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	20423000	USD
CY2020Q3	ffnw	Impaired Financing Receivable With No Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeRecognized	210000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	19848000	USD
	ffnw	Impaired Financing Receivable With No Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeRecognized	725000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1466000	USD
CY2020Q3	ffnw	Impaired Financing Receivable With Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeRecognized	22000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1806000	USD
	ffnw	Impaired Financing Receivable With Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeRecognized	68000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	21889000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	232000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	21654000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	793000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	16238000	USD
CY2019Q3	ffnw	Impaired Financing Receivable With No Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeRecognized	280000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	10958000	USD
	ffnw	Impaired Financing Receivable With No Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeRecognized	805000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2169000	USD
CY2019Q3	ffnw	Impaired Financing Receivable With Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeRecognized	33000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2773000	USD
	ffnw	Impaired Financing Receivable With Related Allowance Interest Income Recognized ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeRecognized	95000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	18407000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	313000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	13731000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	900000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	4100000	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5200000	USD
CY2020Q3	ffnw	Troubled Debt Restructuring Commitment To Extend Additional Credit TroubledDebtRestructuringCommitmentToExtendAdditionalCredit	0	USD
	ffnw	Troubled Debt Restructuring Charge To Allowance For Loan And Lease Losses TroubledDebtRestructuringChargeToAllowanceForLoanAndLeaseLosses	0	USD
CY2020Q3	ffnw	Troubled Debt Restructuring Charge To Allowance For Loan And Lease Losses TroubledDebtRestructuringChargeToAllowanceForLoanAndLeaseLosses	0	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	2	loan
CY2019Q3	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1391000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1391000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	11	loan
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	2909000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	2909000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	USD
CY2020Q2	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2019Q2	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2019Q4	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2018Q4	us-gaap	Other Real Estate OtherRealEstate	483000	USD
CY2020Q3	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	0	USD
CY2019Q3	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	0	USD
	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	0	USD
	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	-29000	USD
CY2020Q3	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2019Q3	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2020Q3	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2019Q3	us-gaap	Other Real Estate OtherRealEstate	454000	USD
	ffnw	Real Estate Properties Sold RealEstatePropertiesSold	0	property
CY2020Q3	ffnw	Real Estate Properties Sold RealEstatePropertiesSold	0	property
CY2020Q3	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	0	USD
	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	0	USD
CY2019Q3	ffnw	Real Estate Properties Sold RealEstatePropertiesSold	0	property
	ffnw	Real Estate Properties Sold RealEstatePropertiesSold	0	property
	us-gaap	Other Real Estate Valuation Adjustments OtherRealEstateValuationAdjustments	-29000	USD
CY2020Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	2100000	USD
CY2020Q3	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	126020000	USD
CY2019Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	136601000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	137027000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	21703000	USD
CY2020Q3	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2020Q3	ffnw	Impaired Loans Receivable And Other Real Estate Owned Fair Value Measurement ImpairedLoansReceivableAndOtherRealEstateOwnedFairValueMeasurement	22157000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	12000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	19939000	USD
CY2019Q4	us-gaap	Other Real Estate OtherRealEstate	454000	USD
CY2019Q4	ffnw	Impaired Loans Receivable And Other Real Estate Owned Fair Value Measurement ImpairedLoansReceivableAndOtherRealEstateOwnedFairValueMeasurement	20393000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	31000	USD
CY2020Q3	us-gaap	Property Subject To Or Available For Operating Lease Number Of Units PropertySubjectToOrAvailableForOperatingLeaseNumberOfUnits	13	lease
CY2020Q3	ffnw	Lessee Operating Lease Liability Monthly Payment Due LesseeOperatingLeaseLiabilityMonthlyPaymentDue	67000	USD
CY2020Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	226000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	669000	USD
CY2019Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	170000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	514000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3830000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3940000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y3M18D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0213	Rate
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	719000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	686000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	615000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	487000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	394000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1361000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	4262000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	320000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	3942000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P63M
	us-gaap	Operating Leases Rent Expense Minimum Rentals OperatingLeasesRentExpenseMinimumRentals	5300000	USD
CY2020Q3	us-gaap	Derivative Average Fixed Interest Rate DerivativeAverageFixedInterestRate	0.0080
	us-gaap	Derivative Loss On Derivative DerivativeLossOnDerivative	3800000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	3000000.0	USD
CY2020Q3	us-gaap	Gain Loss On Cash Flow Hedge Ineffectiveness Net GainLossOnCashFlowHedgeIneffectivenessNet	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	271000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-187000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-3368000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-1145000	USD
CY2020Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	224000	USD
CY2019Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	226000	USD
CY2020Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	47000	USD
CY2019Q3	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	48000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	367000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	457000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	77000	USD
	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	96000	USD
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	313000	shares
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	10.34
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	133750	USD
CY2020Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	3.69
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	313000	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	10.34
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y2M23D
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	87850	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	3.69
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	305000	shares
CY2020Q3	ffnw	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverage	10.27
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y2M4D
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	87850	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	3.66
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	313000	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	10.34
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1440310	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	3.69
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	313000	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	10.34
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y2M23D
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	87850	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	3.69
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	305000	shares
CY2020Q3	ffnw	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverage	10.27
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y2M4D
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	87850	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	3.66
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	2082000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	2505000	USD
	us-gaap	Net Income Loss NetIncomeLoss	5910000	USD
	us-gaap	Net Income Loss NetIncomeLoss	7754000	USD
CY2020Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-3000	USD
CY2019Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-4000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-9000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-12000	USD
CY2020Q3	ffnw	Undistributed Earnings Allocatedto Common Shareholders UndistributedEarningsAllocatedtoCommonShareholders	2079000	USD
CY2019Q3	ffnw	Undistributed Earnings Allocatedto Common Shareholders UndistributedEarningsAllocatedtoCommonShareholders	2501000	USD
	ffnw	Undistributed Earnings Allocatedto Common Shareholders UndistributedEarningsAllocatedtoCommonShareholders	5901000	USD
	ffnw	Undistributed Earnings Allocatedto Common Shareholders UndistributedEarningsAllocatedtoCommonShareholders	7742000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9661498	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9901586	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9788397	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9989970	shares
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	10988	shares
CY2019Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	83423	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	20755	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	95985	shares
CY2020Q3	ffnw	Dilutive Stock Awards DilutiveStockAwards	3081	shares
CY2019Q3	ffnw	Dilutive Stock Awards DilutiveStockAwards	6002	shares
	ffnw	Dilutive Stock Awards DilutiveStockAwards	2450	shares
	ffnw	Dilutive Stock Awards DilutiveStockAwards	5676	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9675567	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9991011	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9811602	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	10091631	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.60
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.77
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.77
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	228000	shares
CY2019Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	50000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	203000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	50000	shares
CY2020Q3	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	18000	USD
CY2019Q3	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	88000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	86000	USD
	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	80000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1011000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1039000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2789000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2618000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	0	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	USD

Files In Submission

Name	View Source	Status
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0000939057-20-000420-index.html	Edgar Link	pending
0000939057-20-000420.txt	Edgar Link	pending
0000939057-20-000420-xbrl.zip	Edgar Link	pending
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ffnw-20200930_def.xml	Edgar Link	unprocessable
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$FFNW
First Financial Northwest, Inc. Stock $ffnw

2020 Q4 Form 10-Q Financial Statement

#000093905720000420 Filed on November 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FFNW First Financial Northwest, Inc. Stock $ffnw

2020 Q4 Form 10-Q Financial Statement

#000093905720000420 Filed on November 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FFNW
First Financial Northwest, Inc. Stock $ffnw