$FNWB
First Northwest Bancorp Stock $fnwb

$fnwb Overview Financials Valuation SEC Filings Company Website

2023 Q3 Form 10-Q Financial Statement

#000143774923023278 Filed on August 11, 2023

Income Statement

Concept	2023 Q3	2023 Q2
Revenue	$25.83M	$25.47M
YoY Change	23.87%	34.35%
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	$400.0K	$404.0K
YoY Change	-29.45%	-34.31%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$10.88M	$9.492M
YoY Change	310.56%	452.5%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$3.107M	$2.176M
YoY Change	-29.59%	8.69%
Income Tax	$603.0K	$475.0K
% Of Pretax Income	19.41%	21.83%
Net Earnings	$2.504M	$1.776M
YoY Change	-41.65%	-28.62%
Net Earnings / Revenue	9.69%	6.97%
Basic Earnings Per Share	$0.28	$0.20
Diluted Earnings Per Share	$0.28	$0.20
COMMON SHARES
Basic Shares Outstanding	9.632M	9.668M
Diluted Shares Outstanding	8.935M	8.931M

Balance Sheet

Concept	2023 Q3	2023 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$83.89M	$78.65M
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	$17.95M	$18.14M
YoY Change	-13.85%	-14.8%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$16.60M	$15.03M
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$2.154B	$2.163B
YoY Change	2.97%	6.46%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.300M	$1.367M
YoY Change	2090.48%	196.53%
Accrued Expenses	$34.70M	$44.29M
YoY Change	-0.69%	26.39%
Deferred Revenue
YoY Change
Short-Term Debt	$8.000M	$11.00M
YoY Change	-33.33%	37.5%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$45.00M	$45.65M
YoY Change	28.41%	28.6%
LONG-TERM LIABILITIES
Long-Term Debt	$39.40M	$0.00
YoY Change
Other Long-Term Liabilities	$2.400M	$1.149M
YoY Change	7.91%	23.02%
Total Long-Term Liabilities	$41.80M	$1.149M
YoY Change	1779.5%	23.02%
TOTAL LIABILITIES
Total Short-Term Liabilities	$45.00M	$45.65M
Total Long-Term Liabilities	$41.80M	$1.149M
Total Liabilities	$1.997B	$2.003B
YoY Change	3.24%	7.33%
SHAREHOLDERS EQUITY
Retained Earnings	$113.6M	$111.8M
YoY Change	3.15%	4.44%
Common Stock	$96.00K	$96.00K
YoY Change	-4.0%	-4.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$156.1M	$159.6M
YoY Change
Total Liabilities & Shareholders Equity	$2.154B	$2.163B
YoY Change	2.97%	6.46%

Cashflow Statement

Concept	2023 Q3	2023 Q2
OPERATING ACTIVITIES
Net Income	$2.504M	$1.776M
YoY Change	-41.65%	-28.62%
Depreciation, Depletion And Amortization	$400.0K	$404.0K
YoY Change	-29.45%	-34.31%
Cash From Operating Activities	-$2.500M	$11.00M
YoY Change	-156.08%	83.2%
INVESTING ACTIVITIES
Capital Expenditures	$220.0K	$291.0K
YoY Change	-292.98%	-134.15%
Acquisitions
YoY Change
Other Investing Activities	$5.810M	-$53.29M
YoY Change	-110.52%	-42.95%
Cash From Investing Activities	$5.590M	-$53.58M
YoY Change	-110.1%	-43.16%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	2.140M	-19.39M
YoY Change	-96.79%	-120.73%
NET CHANGE
Cash From Operating Activities	-2.500M	11.00M
Cash From Investing Activities	5.590M	-53.58M
Cash From Financing Activities	2.140M	-19.39M
Net Change In Cash	5.230M	-61.97M
YoY Change	-67.04%	-1276.53%
FREE CASH FLOW
Cash From Operating Activities	-$2.500M	$11.00M
Capital Expenditures	$220.0K	$291.0K
Free Cash Flow	-$2.720M	$10.71M
YoY Change	-159.49%	56.19%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	17297000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	16116000	usd
CY2023Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000
CY2023Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2023Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2023Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	75000000
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	75000000
CY2023Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	9633496
CY2023Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	9633496
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	9703581
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	9703581
CY2022Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.07
CY2023Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.07
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.14
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.14
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2023Q1	fnwb	Employee Stock Ownership Plan Esop Minimum Service Period Hours EmployeeStockOwnershipPlanEsopMinimumServicePeriodHours	1000	pure
CY2023Q2	fnwb	Fair Value Measurement With Unobservable Inputs Reconciliation Discount FairValueMeasurementWithUnobservableInputsReconciliationDiscount	0	usd
CY2022Q4	fnwb	Fair Value Measurement With Unobservable Inputs Reconciliation Discount FairValueMeasurementWithUnobservableInputsReconciliationDiscount	0	usd
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2023-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-36741
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WA
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	46-1259100
	dei	Entity Address Address Line1 EntityAddressAddressLine1	105 West 8th Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Port Angeles
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	98362
	dei	City Area Code CityAreaCode	360
	dei	Local Phone Number LocalPhoneNumber	457-0461
	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
	dei	Trading Symbol TradingSymbol	FNWB
	dei	Security Exchange Name SecurityExchangeName	NASDAQ
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Shell Company EntityShellCompany	false
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CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	18089000	usd
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CY2023Q2	us-gaap	Equity Securities Fv Ni Current And Noncurrent EquitySecuritiesFvNiCurrentAndNoncurrent	14569000	usd
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CY2023Q2	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1087000	usd
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1089000	usd
CY2023Q2	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	15031000	usd
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CY2023Q2	us-gaap	Prepaid Expense And Other Assets PrepaidExpenseAndOtherAssets	26882000	usd
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CY2023Q2	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	303397000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Long Term FederalHomeLoanBankAdvancesLongTerm	285358000	usd
CY2023Q2	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1367000	usd
CY2022Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	455000	usd
CY2023Q2	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	44286000	usd
CY2022Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	32344000	usd
CY2023Q2	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	1149000	usd
CY2022Q4	us-gaap	Advance Payments By Borrowers For Taxes And Insurance AdvancePaymentsByBorrowersForTaxesAndInsurance	1376000	usd
CY2023Q2	us-gaap	Liabilities Liabilities	2003321000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	1883788000	usd
CY2023Q2	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
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CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	114424000	usd
CY2023Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-40066000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-40543000	usd
CY2023Q2	fnwb	Unearned Esop Shares Cost UnearnedESOPSharesCost	7583000	usd
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CY2023Q2	us-gaap	Minority Interest MinorityInterest	0	usd
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CY2023Q2	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	21299000	usd
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CY2022Q2	us-gaap	Interest Income Debt Securities Operating InterestIncomeDebtSecuritiesOperating	2715000	usd
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CY2023Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	617000	usd
CY2022Q2	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	46000	usd
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	fnwb	Dividend Income Operating Federal Home Loan Bank DividendIncomeOperatingFederalHomeLoanBank	414000	usd
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CY2023Q2	fnwb	Fees And Commissions Mortgage Banking And Servicing Net Of Amortization FeesAndCommissionsMortgageBankingAndServicingNetOfAmortization	-191000	usd
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	fnwb	Fees And Commissions Mortgage Banking And Servicing Net Of Amortization FeesAndCommissionsMortgageBankingAndServicingNetOfAmortization	459000	usd
CY2023Q2	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	58000	usd
CY2022Q2	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	231000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	234000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	484000	usd
CY2023Q2	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	0	usd
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	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	118000	usd
CY2023Q2	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	190000	usd
CY2022Q2	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	213000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	416000	usd
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CY2023Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	590000	usd
CY2022Q2	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	668000	usd
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CY2022Q2	us-gaap	Noninterest Income NoninterestIncome	2222000	usd
	us-gaap	Noninterest Income NoninterestIncome	4045000	usd
	us-gaap	Noninterest Income NoninterestIncome	4625000	usd
CY2023Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	8180000	usd
CY2022Q2	us-gaap	Labor And Related Expense LaborAndRelatedExpense	9735000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	16017000	usd
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	18538000	usd
CY2023Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2080000	usd
CY2022Q2	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	1870000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	4118000	usd
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	3642000	usd
CY2023Q2	us-gaap	Occupancy Net OccupancyNet	1214000	usd
CY2022Q2	us-gaap	Occupancy Net OccupancyNet	1432000	usd
	us-gaap	Occupancy Net OccupancyNet	2423000	usd
	us-gaap	Occupancy Net OccupancyNet	2599000	usd
CY2023Q2	fnwb	Supplies Postage And Telephone Expense SuppliesPostageAndTelephoneExpense	435000	usd
CY2022Q2	fnwb	Supplies Postage And Telephone Expense SuppliesPostageAndTelephoneExpense	408000	usd
	fnwb	Supplies Postage And Telephone Expense SuppliesPostageAndTelephoneExpense	790000	usd
	fnwb	Supplies Postage And Telephone Expense SuppliesPostageAndTelephoneExpense	721000	usd
CY2023Q2	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	424000	usd
CY2022Q2	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	441000	usd
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	813000	usd
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	802000	usd
CY2023Q2	us-gaap	Advertising Expense AdvertisingExpense	929000	usd
CY2022Q2	us-gaap	Advertising Expense AdvertisingExpense	1405000	usd
	us-gaap	Advertising Expense AdvertisingExpense	1970000	usd
	us-gaap	Advertising Expense AdvertisingExpense	2157000	usd
CY2023Q2	us-gaap	Professional Fees ProfessionalFees	884000	usd
CY2022Q2	us-gaap	Professional Fees ProfessionalFees	629000	usd
	us-gaap	Professional Fees ProfessionalFees	1690000	usd
	us-gaap	Professional Fees ProfessionalFees	1188000	usd
CY2023Q2	fnwb	Federal Deposit Insurance Corporation Premium Return FederalDepositInsuranceCorporationPremiumReturn	313000	usd
CY2022Q2	fnwb	Federal Deposit Insurance Corporation Premium Return FederalDepositInsuranceCorporationPremiumReturn	211000	usd
	fnwb	Federal Deposit Insurance Corporation Premium Return FederalDepositInsuranceCorporationPremiumReturn	570000	usd
	fnwb	Federal Deposit Insurance Corporation Premium Return FederalDepositInsuranceCorporationPremiumReturn	434000	usd
CY2023Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	758000	usd
CY2022Q2	us-gaap	Other Noninterest Expense OtherNoninterestExpense	832000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1697000	usd
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	1713000	usd
CY2023Q2	us-gaap	Noninterest Expense NoninterestExpense	15217000	usd
CY2022Q2	us-gaap	Noninterest Expense NoninterestExpense	16963000	usd
	us-gaap	Noninterest Expense NoninterestExpense	30088000	usd
	us-gaap	Noninterest Expense NoninterestExpense	31794000	usd
CY2023Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2176000	usd
CY2022Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2002000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	6444000	usd
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5060000	usd
CY2023Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	475000	usd
CY2022Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	467000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1300000	usd
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1021000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	1701000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	1535000	usd
	us-gaap	Profit Loss ProfitLoss	5144000	usd
	us-gaap	Profit Loss ProfitLoss	4039000	usd
CY2023Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-75000	usd
CY2022Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-953000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-160000	usd
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1255000	usd
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	1776000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	2488000	usd
	us-gaap	Net Income Loss NetIncomeLoss	5304000	usd
	us-gaap	Net Income Loss NetIncomeLoss	5294000	usd
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2023Q2	us-gaap	Profit Loss ProfitLoss	1701000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	1535000	usd
	us-gaap	Profit Loss ProfitLoss	5144000	usd
	us-gaap	Profit Loss ProfitLoss	4039000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4152000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-16875000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	639000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-36329000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-1115000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-3545000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-86000	usd
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-7629000	usd
CY2023Q2	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-38000	usd
CY2022Q2	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-36000	usd
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-76000	usd
	us-gaap	Defined Benefit Plan Amortization Of Prior Service Cost Credit DefinedBenefitPlanAmortizationOfPriorServiceCostCredit	-73000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	-8000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	-7000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	-16000	usd
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	-15000	usd
CY2023Q2	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationBeforeTax	1336000	usd
CY2022Q2	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationBeforeTax	0	usd
	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationBeforeTax	-392000	usd
	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationBeforeTax	0	usd
CY2023Q2	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationTax	287000	usd
CY2022Q2	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationTax	-0	usd
	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationTax	-84000	usd
	fnwb	Other Comprehensive Income Loss Fair Value Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossFairValueHedgeGainLossAfterReclassificationTax	-0	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-0	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-8000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-0	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	118000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-1000	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	usd
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	25000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1958000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-13294000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	477000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-28735000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-257000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-11759000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	5621000	usd
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-24696000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-75000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-953000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-160000	usd
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-1255000	usd
CY2023Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-182000	usd
CY2022Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-10806000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5781000	usd
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-23441000	usd
CY2022Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	177776000	usd
CY2022Q2	us-gaap	Profit Loss ProfitLoss	1535000	usd
CY2022Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	859000	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
CY2022Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	27000	usd
CY2022Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-13294000	usd
CY2022Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	479000	usd
CY2022Q2	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	245000	usd
CY2022Q2	us-gaap	Dividends Cash DividendsCash	701000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	165154000	usd
CY2023Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	160336000	usd
CY2023Q2	us-gaap	Profit Loss ProfitLoss	1701000	usd
CY2023Q2	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	341000	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
CY2023Q2	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	17000	usd
CY2023Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1958000	usd
CY2023Q2	fnwb	Close Out Of Investment CloseOutOfInvestment	-0	usd
CY2023Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	358000	usd
CY2023Q2	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	153000	usd
CY2023Q2	us-gaap	Dividends Cash DividendsCash	675000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	159557000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	190480000	usd
	us-gaap	Profit Loss ProfitLoss	4039000	usd
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	859000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	222000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-28735000	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	890000	usd
	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	536000	usd
	us-gaap	Dividends Cash DividendsCash	1399000	usd
CY2022Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	165154000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	158282000	usd
	us-gaap	Profit Loss ProfitLoss	5144000	usd
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	968000	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	usd
	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	162000	usd
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	477000	usd
	fnwb	Close Out Of Investment CloseOutOfInvestment	-0	usd
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	749000	usd
	us-gaap	Amortization Of Esop Award AmortizationOfESOPAward	340000	usd
	us-gaap	Dividends Cash DividendsCash	1354000	usd
CY2023Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	159557000	usd
	us-gaap	Profit Loss ProfitLoss	5144000	usd
	us-gaap	Profit Loss ProfitLoss	4039000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	799000	usd
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	983000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2000	usd
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-711000	usd
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-898000	usd
	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	160000	usd
	us-gaap	Amortization Of Deferred Loan Origination Fees Net AmortizationOfDeferredLoanOriginationFeesNet	-571000	usd
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	39000	usd
	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	39000	usd
	fnwb	Fair Value Adjustment Of Sold Loan Servicing Rights FairValueAdjustmentOfSoldLoanServicingRights	137000	usd
	fnwb	Fair Value Adjustment Of Sold Loan Servicing Rights FairValueAdjustmentOfSoldLoanServicingRights	53000	usd
	fnwb	Servicing Asset At Fair Value Additions Net ServicingAssetAtFairValueAdditionsNet	-75000	usd
	fnwb	Servicing Asset At Fair Value Additions Net ServicingAssetAtFairValueAdditionsNet	-98000	usd
	fnwb	Financing Receivable Credit Loss Expense Reversal Including Unfunded Commitments FinancingReceivableCreditLossExpenseReversalIncludingUnfundedCommitments	-200000	usd
	fnwb	Financing Receivable Credit Loss Expense Reversal Including Unfunded Commitments FinancingReceivableCreditLossExpenseReversalIncludingUnfundedCommitments	500000	usd
	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	340000	usd
	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	404000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	749000	usd
	us-gaap	Share Based Compensation ShareBasedCompensation	890000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	234000	usd
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	484000	usd
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-0	usd
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	118000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	416000	usd
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	465000	usd
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	13294000	usd
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	16487000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	12076000	usd
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	17035000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	737000	usd
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	513000	usd
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1299000	usd
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3854000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	912000	usd
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	68000	usd
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	10699000	usd
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	5788000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	17791000	usd
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	9256000	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	-0	usd
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	78409000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	4535000	usd
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	19565000	usd
	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	12685000	usd
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	940000	usd
	us-gaap	Payments For Proceeds From Federal Home Loan Bank Stock PaymentsForProceedsFromFederalHomeLoanBankStock	5206000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	15000	usd
	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	91792000	usd
	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	112363000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	850000	usd
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2442000	usd
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	209000	usd
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	6979000	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	347000	usd
	us-gaap	Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital	0	usd
	us-gaap	Payments To Acquire Partners Interest In Real Estate Partnership Net Of Cash Acquired PaymentsToAcquirePartnersInterestInRealEstatePartnershipNetOfCashAcquired	-0	usd
	us-gaap	Payments To Acquire Partners Interest In Real Estate Partnership Net Of Cash Acquired PaymentsToAcquirePartnersInterestInRealEstatePartnershipNetOfCashAcquired	1829000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-88894000	usd
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-174978000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	88867000	usd
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	144000	usd
	fnwb	Proceeds From Fhl Bank Advance Financing Activities ProceedsFromFHLBankAdvanceFinancingActivities	15000000	usd
	fnwb	Proceeds From Fhl Bank Advance Financing Activities ProceedsFromFHLBankAdvanceFinancingActivities	10000000	usd
	fnwb	Payments Of Fhlbank Borrowings Financing Activities Longterm PaymentsOfFhlbankBorrowingsFinancingActivitiesLongterm	10000000	usd
	fnwb	Payments Of Fhlbank Borrowings Financing Activities Longterm PaymentsOfFhlbankBorrowingsFinancingActivitiesLongterm	-0	usd
	fnwb	Payments Of Fhlbank Borrowings Financing Activities Shortterm PaymentsOfFhlbankBorrowingsFinancingActivitiesShortterm	-14000000	usd
	fnwb	Payments Of Fhlbank Borrowings Financing Activities Shortterm PaymentsOfFhlbankBorrowingsFinancingActivitiesShortterm	-112000000	usd
	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-1000000	usd
	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	8000000	usd
	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-227000	usd
	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	-174000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	1354000	usd
	us-gaap	Payments Of Dividends PaymentsOfDividends	1388000	usd
	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	162000	usd
	us-gaap	Payments For Repurchase Of Other Equity PaymentsForRepurchaseOfOtherEquity	222000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	968000	usd
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	859000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	104156000	usd
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	127501000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	33053000	usd
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-38221000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	45596000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	126016000	usd
CY2023Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	78649000	usd
CY2022Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	87795000	usd
	us-gaap	Interest Paid Net InterestPaidNet	15557000	usd
	us-gaap	Interest Paid Net InterestPaidNet	3065000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1811000	usd
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1110000	usd
	us-gaap	Debt Securities Available For Sale Unrealized Gain Loss DebtSecuritiesAvailableForSaleUnrealizedGainLoss	639000	usd
	us-gaap	Debt Securities Available For Sale Unrealized Gain Loss DebtSecuritiesAvailableForSaleUnrealizedGainLoss	-36447000	usd
	fnwb	Unrealized Gain Loss On Fair Value Hedging Instruments UnrealizedGainLossOnFairValueHedgingInstruments	-392000	usd
	fnwb	Unrealized Gain Loss On Fair Value Hedging Instruments UnrealizedGainLossOnFairValueHedgingInstruments	0	usd
	fnwb	Cumulative Adjustment To Servicing Right Asset Due To Election Of Fair Value Option CumulativeAdjustmentToServicingRightAssetDueToElectionOfFairValueOption	0	usd
	fnwb	Cumulative Adjustment To Servicing Right Asset Due To Election Of Fair Value Option CumulativeAdjustmentToServicingRightAssetDueToElectionOfFairValueOption	538000	usd
	fnwb	Cumulative Effect Of Adoption Of New Accounting Standard CumulativeEffectOfAdoptionOfNewAccountingStandard	-3735000	usd
	fnwb	Cumulative Effect Of Adoption Of New Accounting Standard CumulativeEffectOfAdoptionOfNewAccountingStandard	0	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	311657000	usd
CY2015Q1	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	13100360
CY2015Q1	fnwb	Proceeds From Issuance Of Common Stock Net ProceedsFromIssuanceOfCommonStockNet	117600000	usd
CY2015Q1	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	58400000	usd
CY2015Q4	fnwb	Employee Stock Ownership Plan Esop EmployeeStockOwnershipPlanESOP	0.08	pure
CY2015Q4	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	1048029
CY2023Q1	srt	Financing Receivable Allowance For Credit Loss To Outstanding Percent FinancingReceivableAllowanceForCreditLossToOutstandingPercent	0.0118	pure
CY2022Q4	srt	Financing Receivable Allowance For Credit Loss To Outstanding Percent FinancingReceivableAllowanceForCreditLossToOutstandingPercent	0.0104	pure
CY2023Q2	srt	Financing Receivable Allowance For Credit Loss To Outstanding Percent FinancingReceivableAllowanceForCreditLossToOutstandingPercent	0.0106	pure
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1900000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	594000	usd
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<b>Reclassifications</b> - Certain amounts in the unaudited interim consolidated financial statements for prior periods have been reclassified to conform to the current unaudited financial statement presentation with <em style="font: inherit;">no</em> effect on net income or shareholders' equity.
CY2023Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	369938000	usd
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2023Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	47975000	usd
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	321963000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	375183000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	48615000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	326569000	usd
CY2023Q2	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	0	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2100000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2000000.0	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	734000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	10005000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	47241000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	47975000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	321662000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	27459000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	204141000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	21156000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	119642000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	48615000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	323783000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	8	pure
CY2023Q2	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	174	pure
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	113	pure
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	69	pure
CY2023Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	369938000	usd
CY2023Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	321963000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	375183000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	326569000	usd
CY2023Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2022Q2	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2233000	usd
	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	12685000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	usd
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	usd
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	128000	usd
CY2023Q2	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
CY2022Q2	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	-8000	usd
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	usd
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	-10000	usd
CY2023Q2	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	14200000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	13200000	usd
CY2023Q2	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	5400000	usd
CY2022Q4	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	4700000	usd
CY2023Q2	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	1638160000	usd
CY2022Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	1547551000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	17297000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	16116000	usd
CY2023Q2	us-gaap	Notes Receivable Net NotesReceivableNet	1620863000	usd
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	1531435000	usd
CY2023Q2	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	2554000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	1793000	usd
CY2023Q2	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	18000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	26000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1547551000	usd
CY2023Q2	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	1638160000	usd
CY2022Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	1547551000	usd
CY2023Q2	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	144332000	usd
CY2023Q2	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	453758000	usd
CY2023Q2	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	477461000	usd
CY2023Q2	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	266709000	usd
CY2023Q2	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	60479000	usd
CY2023Q2	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	161733000	usd
CY2023Q2	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	73688000	usd
CY2023Q2	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	1638160000	usd
	us-gaap	Financing Receivable Year One Originated Current Fiscal Year Writeoff FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteoff	0	usd
	us-gaap	Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff	1760000	usd
	us-gaap	Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff	4000	usd
	us-gaap	Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff	1000	usd
	us-gaap	Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff	11000	usd
	us-gaap	Financing Receivable Originated More Than Five Years Before Current Fiscal Year Writeoff FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff	102000	usd
	us-gaap	Financing Receivable Revolving Writeoff FinancingReceivableRevolvingWriteoff	59000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1937000	usd
CY2022Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	1547551000	usd
CY2023Q2	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	1500000	usd
CY2022Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	1753000	usd
CY2022Q4	fnwb	Financing Receivable Modifications Recorded Investment Nonaccrual FinancingReceivableModificationsRecordedInvestmentNonaccrual	29000	usd
CY2022Q4	fnwb	Financing Receivable Troubled Debt Restructuring Accrual FinancingReceivableTroubledDebtRestructuringAccrual	1724000	usd
CY2022Q4	fnwb	Financing Receivable Modifications Recorded Investment Nonaccrual FinancingReceivableModificationsRecordedInvestmentNonaccrual	29000	usd
CY2022Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	1753000	usd
	fnwb	Financing Receivable Modified Number Of Contracts FinancingReceivableModifiedNumberOfContracts	0	pure
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	972000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	573000	usd
CY2023Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	300000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	17297000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	16116000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	1937000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	594000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	315000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	17297000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	300000	usd
CY2023Q2	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	399000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Period Increase Decrease FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease	315000	usd
	us-gaap	Financing Receivable Allowance For Credit Loss Writeoff After Recovery FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery	1300000	usd
CY2022Q1	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	15127000	usd
CY2022Q2	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	500000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	73000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	193000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	15747000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	15124000	usd
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	500000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	210000	usd
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	333000	usd
CY2022Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	15747000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	16116000	usd
CY2022Q4	fnwb	Financing Receivables Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivablesAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	16084000	usd
CY2022Q4	fnwb	Financing Receivables Allowance For Credit Losses Individually Evaluated For Impairment FinancingReceivablesAllowanceForCreditLossesIndividuallyEvaluatedForImpairment	32000	usd
CY2022Q4	fnwb	Financing Receivable Aggregate Loans Evaluated FinancingReceivableAggregateLoansEvaluated	1534380000	usd
CY2022Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1531346000	usd
CY2022Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	3034000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	716000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	870000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	2318000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	2467000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	32000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	3034000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	3337000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	32000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	666000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	12000	usd
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	602000	usd
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	18000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2516000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	45000	usd
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	2544000	usd
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	82000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3182000	usd
CY2022Q2	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	57000	usd
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	3146000	usd
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	100000	usd
CY2022Q2	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	41000	usd
	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	100000	usd
CY2023Q2	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	280475000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	315083000	usd
CY2023Q2	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	179029000	usd
CY2023Q2	us-gaap	Weighted Average Rate Domestic Deposit Demand WeightedAverageRateDomesticDepositDemand	0.0050	pure
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	193558000	usd
CY2022Q4	us-gaap	Weighted Average Rate Domestic Deposit Demand WeightedAverageRateDomesticDepositDemand	0.0001	pure
CY2023Q2	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	374269000	usd
CY2023Q2	us-gaap	Weighted Average Rate Domestic Deposit Money Market WeightedAverageRateDomesticDepositMoneyMarket	0.0110	pure
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	473009000	usd
CY2022Q4	us-gaap	Weighted Average Rate Domestic Deposit Money Market WeightedAverageRateDomesticDepositMoneyMarket	0.0058	pure
CY2023Q2	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	260279000	usd
CY2023Q2	us-gaap	Weighted Average Rate Domestic Deposit Savings WeightedAverageRateDomesticDepositSavings	0.0141	pure
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	200920000	usd
CY2022Q4	us-gaap	Weighted Average Rate Domestic Deposit Savings WeightedAverageRateDomesticDepositSavings	0.0026	pure
CY2023Q2	us-gaap	Time Deposits TimeDeposits	559070000	usd
CY2023Q2	us-gaap	Weighted Average Rate Domestic Deposit Certificates Of Deposit WeightedAverageRateDomesticDepositCertificatesOfDeposit	0.0355	pure
CY2022Q4	us-gaap	Time Deposits TimeDeposits	381685000	usd
CY2022Q4	us-gaap	Weighted Average Rate Domestic Deposit Certificates Of Deposit WeightedAverageRateDomesticDepositCertificatesOfDeposit	0.0219	pure
CY2023Q2	us-gaap	Deposits Deposits	1653122000	usd
CY2023Q2	us-gaap	Weighted Average Rate Domestic Deposit WeightedAverageRateDomesticDeposit	0.0173	pure
CY2022Q4	us-gaap	Deposits Deposits	1564255000	usd
CY2022Q4	us-gaap	Weighted Average Rate Domestic Deposit WeightedAverageRateDomesticDeposit	0.0074	pure
CY2023Q2	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	179600000	usd
CY2022Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	133900000	usd
CY2023Q2	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	157100000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	96600000	usd
CY2023Q2	us-gaap	Time Deposit Maturities Next Rolling Twelve Months TimeDepositMaturitiesNextRollingTwelveMonths	422485000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Next Rolling Twelve Months TimeDepositMaturitiesNextRollingTwelveMonths	262189000	usd
CY2023Q2	us-gaap	Time Deposit Maturities Rolling Year Two TimeDepositMaturitiesRollingYearTwo	104285000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Rolling Year Two TimeDepositMaturitiesRollingYearTwo	69967000	usd
CY2023Q2	us-gaap	Time Deposit Maturities Rolling Year Three TimeDepositMaturitiesRollingYearThree	16339000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Rolling Year Three TimeDepositMaturitiesRollingYearThree	37032000	usd
CY2023Q2	us-gaap	Time Deposit Maturities Rolling Year Four TimeDepositMaturitiesRollingYearFour	11195000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Rolling Year Four TimeDepositMaturitiesRollingYearFour	7409000	usd
CY2023Q2	us-gaap	Time Deposit Maturities Rolling Year Five TimeDepositMaturitiesRollingYearFive	4766000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Rolling Year Five TimeDepositMaturitiesRollingYearFive	5088000	usd
CY2023Q2	us-gaap	Time Deposits TimeDeposits	559070000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	381685000	usd
CY2023Q2	fnwb	Deposits Public Fund DepositsPublicFund	112100000	usd
CY2022Q4	fnwb	Deposits Public Fund DepositsPublicFund	93300000	usd
CY2023Q2	fnwb	Deposits Funds Held By Federally Recognized Tribes DepositsFundsHeldByFederallyRecognizedTribes	18900000	usd
CY2022Q4	fnwb	Deposits Funds Held By Federally Recognized Tribes DepositsFundsHeldByFederallyRecognizedTribes	10300000	usd
CY2023Q2	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	201000	usd
CY2022Q2	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	25000	usd
	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	395000	usd
	us-gaap	Interest Expense Demand Deposit Accounts InterestExpenseDemandDepositAccounts	42000	usd
CY2023Q2	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	944000	usd
CY2022Q2	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	323000	usd
	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	1720000	usd
	us-gaap	Interest Expense Money Market Deposits InterestExpenseMoneyMarketDeposits	621000	usd
CY2023Q2	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	762000	usd
CY2022Q2	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	26000	usd
	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	1138000	usd
	us-gaap	Interest Expense Savings Deposits InterestExpenseSavingsDeposits	52000	usd
CY2023Q2	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	4302000	usd
CY2022Q2	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	422000	usd
	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	7309000	usd
	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	798000	usd
CY2023Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	6209000	usd
CY2022Q2	us-gaap	Interest Expense Deposits InterestExpenseDeposits	796000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	10562000	usd
	us-gaap	Interest Expense Deposits InterestExpenseDeposits	1513000	usd
CY2023Q2	fnwb	Federal Home Loan Bank Advances Maximum Available Credit To Bank Assets Percentage FederalHomeLoanBankAdvancesMaximumAvailableCreditToBankAssetsPercentage	0.45	pure
CY2023Q2	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	917800000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	753700000	usd
CY2023Q2	us-gaap	Line Of Credit Facility Fair Value Of Amount Outstanding LineOfCreditFacilityFairValueOfAmountOutstanding	11000000	usd
	us-gaap	Line Of Credit Facility Maximum Monthend Outstanding Amount LineOfCreditFacilityMaximumMonthendOutstandingAmount	11000000	usd
	fnwb	Line Of Credit Facility Average Monthly Amount LineOfCreditFacilityAverageMonthlyAmount	10718000	usd
	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0894	pure
CY2023Q2	us-gaap	Line Of Credit Facility Interest Rate At Period End LineOfCreditFacilityInterestRateAtPeriodEnd	0.0875	pure
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.202	pure
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.202	pure
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	pure
CY2023Q2	us-gaap	Net Income Loss NetIncomeLoss	1776000	usd
CY2022Q2	us-gaap	Net Income Loss NetIncomeLoss	2488000	usd
	us-gaap	Net Income Loss NetIncomeLoss	5304000	usd
	us-gaap	Net Income Loss NetIncomeLoss	5294000	usd
CY2023Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	9000	usd
CY2022Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	25000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	28000	usd
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	55000	usd
CY2023Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1767000	usd
CY2022Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2463000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5276000	usd
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5239000	usd
CY2023Q2	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	9667380
CY2022Q2	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	9849265
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	9684673
	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	9846086
CY2023Q2	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	139760
CY2022Q2	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	92626
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	152474
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	95390
CY2023Q2	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	613265
CY2022Q2	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	661745
	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	619841
	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	668323
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8914355
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9094894
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8912358
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9082373
CY2023Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8914355
CY2022Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9094894
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8912358
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9082373
CY2023Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	17031
CY2022Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	71237
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	19759
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	84942
CY2023Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8931386
CY2022Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9166131
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8932117
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9167315
CY2023Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2022Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2023Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2022Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.59
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14987
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1186
CY2023Q1	fnwb	Employee Stock Ownership Plan Esop Requisite Service Period EmployeeStockOwnershipPlanEsopRequisiteServicePeriod	P12M
CY2023Q1	fnwb	Employee Stock Ownership Plan Esop Debt Structure Amortization Period EmployeeStockOwnershipPlanEsopDebtStructureAmortizationPeriod	P20Y
CY2023Q1	fnwb	Employee Stock Ownership Plan Esop Debt Structure Estimated Interest Rate EmployeeStockOwnershipPlanEsopDebtStructureEstimatedInterestRate	0.0246	pure
	fnwb	Employee Stock Ownership Plan Esop Principal And Interest Payments From Esop EmployeeStockOwnershipPlanEsopPrincipalAndInterestPaymentsFromEsop	835000	usd
CY2023Q2	fnwb	Employee Stock Ownership Plan Esop Compensation Expense Net Of Dividends Received EmployeeStockOwnershipPlanEsopCompensationExpenseNetOfDividendsReceived	153000	usd
CY2022Q2	fnwb	Employee Stock Ownership Plan Esop Compensation Expense Net Of Dividends Received EmployeeStockOwnershipPlanEsopCompensationExpenseNetOfDividendsReceived	245000	usd
	fnwb	Employee Stock Ownership Plan Esop Compensation Expense Net Of Dividends Received EmployeeStockOwnershipPlanEsopCompensationExpenseNetOfDividendsReceived	340000	usd
	fnwb	Employee Stock Ownership Plan Esop Compensation Expense Net Of Dividends Received EmployeeStockOwnershipPlanEsopCompensationExpenseNetOfDividendsReceived	536000	usd
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	439174
CY2022Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Allocated Shares EmployeeStockOwnershipPlanESOPNumberOfAllocatedShares	386285
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	0
CY2022Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	26442
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	608855
CY2022Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	635302
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1048029
CY2022Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	1048029
CY2023Q2	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	6929000	usd
CY2022Q4	us-gaap	Employee Stock Ownership Plan Esop Deferred Shares Fair Value EmployeeStockOwnershipPlanESOPDeferredSharesFairValue	9758000	usd
CY2023Q2	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	351000	usd
CY2023Q2	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	2200000	usd
CY2021Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	0	usd
CY2022	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	12490000	usd
CY2022	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	usd
CY2022	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	73000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	12563000	usd
CY2023Q2	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	392000	usd
CY2023Q2	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	50000000.0	usd
CY2023Q2	fnwb	Derivative Credit Risk Valuation Amount Of Collateral Posted On Credit Deterioration DerivativeCreditRiskValuationAmountOfCollateralPostedOnCreditDeterioration	50000000.0	usd
CY2023Q2	fnwb	Derivative Credit Risk Valuation Amount Of Collateral Posted On Credit Deterioration DerivativeCreditRiskValuationAmountOfCollateralPostedOnCreditDeterioration	50000000.0	usd

Files In Submission

Name	View Source	Status
0001437749-23-023278-index-headers.html	Edgar Link	pending
0001437749-23-023278-index.html	Edgar Link	pending
0001437749-23-023278.txt	Edgar Link	pending
0001437749-23-023278-xbrl.zip	Edgar Link	pending
ex_526509.htm	Edgar Link	pending
ex_526510.htm	Edgar Link	pending
ex_526511.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
fnwb-20230630.xsd	Edgar Link	pending
fnwb20230630_10q.htm	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
fnwb-20230630_cal.xml	Edgar Link	unprocessable
fnwb-20230630_def.xml	Edgar Link	unprocessable
fnwb-20230630_lab.xml	Edgar Link	unprocessable
fnwb-20230630_pre.xml	Edgar Link	unprocessable
fnwb20230630_10q_htm.xml	Edgar Link	completed
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$FNWB
First Northwest Bancorp Stock $fnwb

2023 Q3 Form 10-Q Financial Statement

#000143774923023278 Filed on August 11, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FNWB First Northwest Bancorp Stock $fnwb

2023 Q3 Form 10-Q Financial Statement

#000143774923023278 Filed on August 11, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FNWB
First Northwest Bancorp Stock $fnwb