$CFFN
Capitol Federal Financial, Inc. Stock $cffn

$cffn Overview Financials Valuation SEC Filings Company Website

2022 Q4 Form 10-K Financial Statement

#000149090622000038 Filed on November 23, 2022

Income Statement

Concept	2022 Q4	2022 Q3	2022
Revenue	$91.34M		$18.10M
YoY Change	46.22%		-92.99%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$5.070M		$18.31M
YoY Change	14.4%		2.17%
% of Gross Profit
Depreciation & Amortization	$2.572M	$2.668M	$10.74M
YoY Change	-4.74%	-4.71%	-2.39%
% of Gross Profit
Operating Expenses	$5.070M		$18.31M
YoY Change	14.4%		2.17%
Operating Profit
YoY Change
Interest Expense	$45.51M		$86.95M
YoY Change	170.07%		4.53%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$19.75M	$24.82M	$107.2M
YoY Change	-29.13%	3.78%	11.64%
Income Tax	$3.507M	$5.332M	$22.75M
% Of Pretax Income	17.76%	21.48%	21.22%
Net Earnings	$16.24M	$19.49M	$84.45M
YoY Change	-26.8%	5.08%	11.0%
Net Earnings / Revenue	17.78%		466.59%
Basic Earnings Per Share	$0.12		$0.62
Diluted Earnings Per Share	$0.12	$143.6K	$0.62
COMMON SHARES
Basic Shares Outstanding	137.5M shares	138.9M shares	135.7M shares
Diluted Shares Outstanding	134.6M shares		135.7M shares

Balance Sheet

Concept	2022 Q4	2022 Q3	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$49.70M	$49.20M
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	$93.51M	$94.82M	$106.4M
YoY Change	-4.31%	-4.34%	-4.81%
Goodwill		$9.324M
YoY Change		0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$29.92M	$33.88M	$33.88M
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$9.930B	$9.625B	$9.625B
YoY Change	3.34%	-0.07%	-0.07%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$119.0M	$121.3M	$121.3M
YoY Change	3.49%	-5.96%	-6.18%
Accrued Expenses		$11.80M	$11.80M
YoY Change		-9.23%	-7.81%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$119.0M	$121.3M	$121.3M
YoY Change	0.01%	-15.17%	-15.17%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$36.21M	$80.07M	$80.07M
YoY Change	-4.72%	9.68%	10.13%
Total Long-Term Liabilities	$36.21M	$80.07M	$80.07M
YoY Change	-4.72%	9.68%	10.13%
TOTAL LIABILITIES
Total Short-Term Liabilities	$119.0M	$121.3M	$121.3M
Total Long-Term Liabilities	$36.21M	$80.07M	$80.07M
Total Liabilities	$8.875B	$8.528B	$8.528B
YoY Change	5.75%	1.66%	1.51%
SHAREHOLDERS EQUITY
Retained Earnings	$47.30M	$80.27M
YoY Change	-40.69%	-18.88%
Common Stock	$1.169B	$1.192B
YoY Change	-1.83%	0.05%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.055B	$1.096B	$1.096B
YoY Change
Total Liabilities & Shareholders Equity	$9.930B	$9.625B	$9.625B
YoY Change	3.34%	-0.07%	-0.07%

Cashflow Statement

Concept	2022 Q4	2022 Q3	2022
OPERATING ACTIVITIES
Net Income	$16.24M	$19.49M	$84.45M
YoY Change	-26.8%	5.08%	11.0%
Depreciation, Depletion And Amortization	$2.572M	$2.668M	$10.74M
YoY Change	-4.74%	-4.71%	-2.39%
Cash From Operating Activities	$14.60M	$33.91M	$97.30M
YoY Change	-27.96%	46.78%	30.66%
INVESTING ACTIVITIES
Capital Expenditures	$1.093M	-$1.065M	$5.557M
YoY Change	-28.37%	-18.08%	-40.95%
Acquisitions
YoY Change
Other Investing Activities	-$290.0M	-$177.8M	-$162.0M
YoY Change	-405.92%	248.62%	-48.94%
Cash From Investing Activities	-$291.1M	-$178.9M	-$167.6M
YoY Change	-412.14%	241.99%	-48.7%
FINANCING ACTIVITIES
Cash Dividend Paid	$49.21M		$103.1M
YoY Change	18.91%		-12.52%
Common Stock Issuance & Retirement, Net			$0.00
YoY Change			-100.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$277.0M	139.4M	$49.18M
YoY Change	-1195.77%	-616.15%	-40.6%
NET CHANGE
Cash From Operating Activities	$14.60M	33.91M	$97.30M
Cash From Investing Activities	-$291.1M	-178.9M	-$167.6M
Cash From Financing Activities	$277.0M	139.4M	$49.18M
Net Change In Cash	$492.0K	-5.595M	-$21.10M
YoY Change	-99.44%	-90.04%	-87.55%
FREE CASH FLOW
Cash From Operating Activities	$14.60M	$33.91M	$97.30M
Capital Expenditures	$1.093M	-$1.065M	$5.557M
Free Cash Flow	$13.51M	$34.97M	$91.74M
YoY Change	-27.93%	43.33%	41.02%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001490906
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Amendment Flag AmendmentFlag	false
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CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-09-30
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-30
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-34814
CY2022	dei	Entity Registrant Name EntityRegistrantName	Capitol Federal Financial, Inc.
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	27-2631712
CY2022Q1	dei	Entity Public Float EntityPublicFloat	1450000000	usd
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	700 South Kansas Avenue,
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Topeka,
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	KS
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	66603
CY2022	dei	City Area Code CityAreaCode	785
CY2022	dei	Local Phone Number LocalPhoneNumber	235-1341
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2022	dei	Trading Symbol TradingSymbol	CFFN
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2021	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	1715000	usd
CY2020	us-gaap	Supplies And Postage Expense SuppliesAndPostageExpense	2195000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	4752000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	0	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4432000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	4930000	usd
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	5514000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	112851000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	115569000	usd
CY2020	us-gaap	Noninterest Expense NoninterestExpense	106004000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	107203000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	96028000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	80630000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22750000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19946000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16090000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	84453000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	76082000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64540000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2022	us-gaap	Net Income Loss NetIncomeLoss	84453000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	76082000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64540000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-51565000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-6116000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	4359000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-159770000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-19077000	usd
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	13578000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	9824000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	6153000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-4875000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	30442000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	19277000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-15184000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-44875000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	76282000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	62934000	usd
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	1336326000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64540000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1606000	usd
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	1988000	usd
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-19000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	570000	usd
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	23804000	usd
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	638000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.68
CY2020	us-gaap	Dividends Cash DividendsCash	93862000	usd
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	1284859000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	76082000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	200000	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	2036000	usd
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-16000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	496000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1530000	usd
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	324000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.87
CY2021	us-gaap	Dividends Cash DividendsCash	117890000	usd
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	1242273000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	84453000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-129328000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Ownership Plan StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan	1740000	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-6000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	498000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.76
CY2022	us-gaap	Dividends Cash DividendsCash	103131000	usd
CY2022Q3	us-gaap	Stockholders Equity StockholdersEquity	1096499000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	84453000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	76082000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64540000	usd
CY2022	us-gaap	Dividend Income Operating DividendIncomeOperating	10031000	usd
CY2021	us-gaap	Dividend Income Operating DividendIncomeOperating	3916000	usd
CY2020	us-gaap	Dividend Income Operating DividendIncomeOperating	5827000	usd
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-4630000	usd
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-8510000	usd
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	22300000	usd
CY2022	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1088000	usd
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1780000	usd
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	0	usd
CY2022	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1113000	usd
CY2021	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1825000	usd
CY2020	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	0	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4967000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-6206000	usd
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1661000	usd
CY2022	us-gaap	Depreciation Nonproduction DepreciationNonproduction	9365000	usd
CY2021	us-gaap	Depreciation Nonproduction DepreciationNonproduction	9372000	usd
CY2020	us-gaap	Depreciation Nonproduction DepreciationNonproduction	9133000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1372000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1578000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1964000	usd
CY2022	cffn	Amortization Of Deferred Amounts Related To Fhlb Advances Net AmortizationOfDeferredAmountsRelatedToFhlbAdvancesNet	1804000	usd
CY2021	cffn	Amortization Of Deferred Amounts Related To Fhlb Advances Net AmortizationOfDeferredAmountsRelatedToFhlbAdvancesNet	1582000	usd
CY2020	cffn	Amortization Of Deferred Amounts Related To Fhlb Advances Net AmortizationOfDeferredAmountsRelatedToFhlbAdvancesNet	539000	usd
CY2022	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1740000	usd
CY2021	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	2036000	usd
CY2020	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1988000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	498000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	496000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	570000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2047000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1668000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5588000	usd
CY2022	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	0	usd
CY2021	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	7386000	usd
CY2020	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	0	usd
CY2022	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	12050000	usd
CY2021	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	0	usd
CY2020	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	0	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-6661000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-12751000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-9105000	usd
CY2022	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-2197000	usd
CY2021	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	105000	usd
CY2020	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	774000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-10823000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-14306000	usd
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-8231000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	97301000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	74467000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	92928000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	88026000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1079351000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1007763000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	323025000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	594294000	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	667952000	usd
CY2022	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	302243000	usd
CY2021	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	25386000	usd
CY2020	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	10421000	usd
CY2022	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	319415000	usd
CY2021	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	1029000	usd
CY2020	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0	usd
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	381561000	usd
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-132800000	usd
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	-191359000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5557000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9410000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	14742000	usd
CY2022	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	692000	usd
CY2021	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	194000	usd
CY2020	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	993000	usd
CY2022	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	0	usd
CY2021	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	7386000	usd
CY2020	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	0	usd
CY2022	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	usd
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	2619000	usd
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	0	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1023000	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	443000	usd
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	490000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-167576000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-326668000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-151290000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	103131000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	117890000	usd
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	93862000	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-402530000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	405988000	usd
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	609541000	usd
CY2022	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	1454402000	usd
CY2021	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	1143800000	usd
CY2020	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	1665600000	usd
CY2022	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	906902000	usd
CY2021	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	1346800000	usd
CY2020	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	2112600000	usd
CY2022	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	7338000	usd
CY2021	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	7008000	usd
CY2020	us-gaap	Increase Decrease In Advance Payments By Borrowers For Taxes And Insurance IncreaseDecreaseInAdvancePaymentsByBorrowersForTaxesAndInsurance	35000	usd
CY2022	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	0	usd
CY2021	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	5077000	usd
CY2020	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	4215000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4568000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	20767000	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	324000	usd
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	638000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	49177000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	82785000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	44370000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-21098000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-169416000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-13992000	usd
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70292000	usd
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	239708000	usd
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	253700000	usd
CY2022Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	49194000	usd
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	70292000	usd
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	239708000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	13559000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	13057000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	13045000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	83833000	usd
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	437731	shares
CY2021	us-gaap	Interest Paid Net InterestPaidNet	83646000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	118610000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	16841000	usd
CY2022	cffn	Operating Lease Liability Obtained OperatingLeaseLiabilityObtained	0	usd
CY2021	cffn	Operating Lease Liability Obtained OperatingLeaseLiabilityObtained	0	usd
CY2020	cffn	Operating Lease Liability Obtained OperatingLeaseLiabilityObtained	16726000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022	us-gaap	Nature Of Operations NatureOfOperations	Capitol Federal Financial, Inc. (the "Company") provides a full range of retail banking services through its wholly-owned subsidiary, Capitol Federal Savings Bank (the "Bank"), a federal savings bank, which has 45 traditional and nine in-store banking offices serving primarily the metropolitan areas of Topeka, Wichita, Lawrence, Manhattan, Emporia and Salina, Kansas and portions of the Kansas City metropolitan area. The Bank emphasizes mortgage lending, primarily originating and purchasing one- to four-family loans, and providing personal retail financial services, along with offering commercial banking and lending products.
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	76032000	usd
CY2022Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	49200000	usd
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	42300000	usd
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	28000000	usd
CY2022Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	4200000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	2900000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022Q3	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	19400000	usd
CY2021Q3	us-gaap	Financing Receivable Accrued Interest After Allowance For Credit Loss FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss	18700000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	76032000	usd
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	64488000	usd
CY2022	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	The Company uses interest rate swaps as part of its interest rate risk management strategy to hedge the variable cash outflows associated with certain borrowings. Interest rate swaps are carried at fair value in the Company's consolidated financial statements. For interest rate swaps that are designated and qualify as cash flow hedges, the effective portion of changes in the fair value of such agreements are recorded in AOCI and are subsequently reclassified into interest expense in the period that interest on the borrowings affects earnings. The ineffective portion of the change in fair value of the interest rate swap is recognized directly in earnings. Effectiveness is assessed using regression analysis. At the inception of a hedge, the Company documents certain items, including the relationship between the hedging instrument and the hedged item, the risk management objective and the nature of the risk being hedged, a description of how effectiveness will be measured and an evaluation of hedged transaction effectiveness.
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	64488000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	135700447	shares
CY2022	us-gaap	Net Income Loss NetIncomeLoss	84453000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	76082000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	64540000	usd
CY2022	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	45000	usd
CY2021	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	50000	usd
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	52000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	84408000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	84408000	usd
CY2022Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	2000000	usd
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	135481232	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	137896704	shares
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	14363	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	4484	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	135700447	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	135495595	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	137901188	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.62
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.56
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.62
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	516603	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	206284	shares
CY2022Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	1768490000	usd
CY2022Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	365000	usd
CY2022Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	205548000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1563307000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	2008456000	usd
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	18705000	usd
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	12553000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	2014608000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	342869000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	22950000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	1185108000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	182598000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1398300000	usd
CY2020	cffn	Employee Stock Ownership Plan Esop Compensation Expense Including Dividends On Unallocated Shares In Excess Of Debt Service Payments EmployeeStockOwnershipPlanEsopCompensationExpenseIncludingDividendsOnUnallocatedSharesInExcessOfDebtServicePayments	2000000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	12488000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	10612000	usd
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	65000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	210000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	210000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	519978000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	469827000	usd
CY2021	cffn	Net Income Tax Benefit Low Income Housing Partnerships NetIncomeTaxBenefitLowIncomeHousingPartnerships	2100000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	5032000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	4646000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	525220000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	474683000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	1243270000	usd
CY2022Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	1088624000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	1768490000	usd
CY2022Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1563307000	usd
CY2022	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	3234000	usd
CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	2710000	usd
CY2020	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4242000	usd
CY2022	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	34000	usd
CY2021	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	115000	usd
CY2020	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	225000	usd
CY2022	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	3268000	usd
CY2021	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	2825000	usd
CY2020	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	4467000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	7464208000	usd
CY2021	us-gaap	Equity Securities Fv Ni Realized Gain EquitySecuritiesFvNiRealizedGain	7400000	usd
CY2021	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	7400000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Fee And Loan In Process FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess	7471670000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Fee And Loan In Process FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess	7096073000	usd
CY2022Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	16371000	usd
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	19823000	usd
CY2022Q3	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	-29736000	usd
CY2020	cffn	Net Income Tax Benefit Low Income Housing Partnerships NetIncomeTaxBenefitLowIncomeHousingPartnerships	1900000	usd
CY2021Q3	us-gaap	Financing Receivable Unamortized Loan Fee Cost FinancingReceivableUnamortizedLoanFeeCost	-29556000	usd
CY2022Q3	us-gaap	Financing Receivable Unamortized Purchase Premium Discount FinancingReceivableUnamortizedPurchasePremiumDiscount	38645000	usd
CY2021Q3	us-gaap	Financing Receivable Unamortized Purchase Premium Discount FinancingReceivableUnamortizedPurchasePremiumDiscount	34448000	usd
CY2021Q3	cffn	Off Balance Sheet Credit Exposures OffBalanceSheetCreditExposures	883800000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	7081142000	usd
CY2022Q3	cffn	Aggregate Amount Of Loans Serviced For Others AggregateAmountOfLoansServicedForOthers	49800000	usd
CY2021Q3	cffn	Aggregate Amount Of Loans Serviced For Others AggregateAmountOfLoansServicedForOthers	63400000	usd
CY2022Q3	cffn	Escrow Balances Held On Loans Serviced For Others EscrowBalancesHeldOnLoansServicedForOthers	1100000	usd
CY2021Q3	cffn	Escrow Balances Held On Loans Serviced For Others EscrowBalancesHeldOnLoansServicedForOthers	1400000	usd
CY2022Q3	cffn	Loan To Value Ratio For Securing Commercial Real Estate Loans Maximum LoanToValueRatioForSecuringCommercialRealEstateLoansMaximum	0.85
CY2022Q3	cffn	Debt Service Coverage Ratio For Commercial Real Estate Loans Minimum DebtServiceCoverageRatioForCommercialRealEstateLoansMinimum	1.15
CY2022Q3	cffn	Loanto Value Ratiofor Securing Commercial Construction Loans Maximum LoantoValueRatioforSecuringCommercialConstructionLoansMaximum	0.80
CY2022Q3	cffn	Debt Service Coverage Ratio For Commercial Real Estate Loans Minimum DebtServiceCoverageRatioForCommercialRealEstateLoansMinimum	1.15
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	1475411000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1824711000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	1019694000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	445538000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	362766000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	2254177000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	98282000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7480579000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	1953147000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1204963000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	520852000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	455353000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	485640000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	2388212000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	92798000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7100965000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	1475411000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1824711000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	1019694000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	445538000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	362766000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	2254177000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	98282000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7480579000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear	1953147000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear	1204963000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear	520852000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear	455353000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear	485640000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear	2388212000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Revolving FinancingReceivableExcludingAccruedInterestRevolving	92798000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7100965000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7480579000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	7100965000	usd
CY2021Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	799000	usd
CY2022Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	328000	usd
CY2021Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	170000	usd
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	11	contract
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	9494000	usd
CY2022Q3	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual No Allowance FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance	2581000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual FinancingReceivableExcludingAccruedInterestNonaccrual	13493000	usd
CY2021Q3	us-gaap	Financing Receivable Excluding Accrued Interest Nonaccrual No Allowance FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance	4763000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	6	contract
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	299000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	299000	usd
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	7	contract
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	176000	usd
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	1685000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1576000	usd
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	3073000	usd
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	3157000	usd
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	3	contract
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	716000	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	0	contract
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Number Of Contracts1 FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1	3	contract
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	181000	usd
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	21600000	usd
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	893000	usd
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	1464000	usd
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	91000	usd
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	23064000	usd
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	984000	usd
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	19823000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	70000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	256000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	-3638000	usd
CY2022Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	16371000	usd
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	31527000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	715000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	237000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	-6465000	usd
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	19823000	usd
CY2019Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	9226000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	443000	usd
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	444000	usd
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	22300000	usd
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	31527000	usd
CY2022Q3	cffn	Off Balance Sheet Credit Exposures OffBalanceSheetCreditExposures	992600000	usd
CY2021Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	5743000	usd
CY2020Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	0	usd
CY2022	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-992000	usd
CY2022Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	4751000	usd
CY2021	us-gaap	Off Balance Sheet Credit Loss Liability Credit Loss Expense Reversal OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal	-2045000	usd
CY2021Q3	us-gaap	Off Balance Sheet Credit Loss Liability OffBalanceSheetCreditLossLiability	5743000	usd
CY2022Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	188213000	usd
CY2021Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	192900000	usd
CY2022Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	93393000	usd
CY2021Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	93773000	usd
CY2022Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	94820000	usd
CY2021	cffn	Employee Stock Ownership Plan Esop Compensation Expense Including Dividends On Unallocated Shares In Excess Of Debt Service Payments EmployeeStockOwnershipPlanEsopCompensationExpenseIncludingDividendsOnUnallocatedSharesInExcessOfDebtServicePayments	2300000	usd
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	99127000	usd
CY2021	us-gaap	Property Plant And Equipment Impairment Or Disposal Disclosure PropertyPlantAndEquipmentImpairmentOrDisposalDisclosure	During fiscal year 2021, management decided to relocate one of the Bank's branches. As a result, the Company classified as held-for-sale and subsequently sold the property where the branch was previously located.
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-940000	usd
CY2022Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	11600000	usd
CY2022Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	11800000	usd
CY2022Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P24Y8M12D
CY2022Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0254
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	1397000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	1404000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	1511000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	164000	usd
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	201000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	17000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	1312000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	1301000	usd
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	1357000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1113000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	993000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	759000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	711000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	667000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	12809000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	17052000	usd
CY2022Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	5239000	usd
CY2022Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	11813000	usd
CY2022Q3	cffn	Investment In Affordable Housing Limited Partnerships InvestmentInAffordableHousingLimitedPartnerships	111900000	usd
CY2021Q3	cffn	Investment In Affordable Housing Limited Partnerships InvestmentInAffordableHousingLimitedPartnerships	101200000	usd
CY2022Q3	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	57900000	usd
CY2021Q3	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	51600000	usd
CY2022	us-gaap	Affordable Housing Tax Credits Commitment Year To Be Paid AffordableHousingTaxCreditsCommitmentYearToBePaid	2025
CY2022	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	9300000	usd
CY2021	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	8400000	usd
CY2020	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	7900000	usd
CY2022	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	11600000	usd
CY2021	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	10500000	usd
CY2020	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	9800000	usd
CY2022	cffn	Net Income Tax Benefit Low Income Housing Partnerships NetIncomeTaxBenefitLowIncomeHousingPartnerships	2300000	usd
CY2020	us-gaap	Affordable Housing Project Investment Write Down Amount AffordableHousingProjectInvestmentWriteDownAmount	0	usd
CY2022	us-gaap	Affordable Housing Project Investment Write Down Amount AffordableHousingProjectInvestmentWriteDownAmount	0	usd
CY2021	us-gaap	Affordable Housing Project Investment Write Down Amount AffordableHousingProjectInvestmentWriteDownAmount	0	usd
CY2022Q3	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	usd
CY2022Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1069000	usd
CY2022Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	774000	usd
CY2022Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	523000	usd
CY2022Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	223000	usd
CY2022Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	0	usd
CY2022Q3	cffn	Fhlb Borrowings Threshold Percentage Of Regulatory Assets FHLBBorrowingsThresholdPercentageOfRegulatoryAssets	0.40
CY2022Q3	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	591400000	usd
CY2021Q3	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	543800000	usd
CY2022Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	334300000	usd
CY2021Q3	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	597400000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Fixed Rate FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate	1700000000	usd
CY2021Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Floating Rate FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFloatingRate	365000000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Floating Rate FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFloatingRate	365000000	usd
CY2022Q3	us-gaap	Line Of Credit LineOfCredit	75000000	usd
CY2021Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Fixed Rate FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate	1230000000	usd
CY2021Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Floating Rate FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFloatingRate	365000000	usd
CY2021Q3	us-gaap	Line Of Credit LineOfCredit	0	usd
CY2022Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	2062500000	usd
CY2021Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	1590000000	usd
CY2022Q3	cffn	Prepayment Penalty On Fhlb Advances PrepaymentPenaltyOnFhlbAdvances	5346000	usd
CY2021Q3	cffn	Prepayment Penalty On Fhlb Advances PrepaymentPenaltyOnFhlbAdvances	7150000	usd
CY2022Q3	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	365000000	usd
CY2021Q3	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	365000000	usd
CY2021Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Floating Rate FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFloatingRate	365000000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary By Interest Rate Type Floating Rate FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFloatingRate	365000000	usd
CY2022	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P3Y1M6D
CY2021	us-gaap	Derivative Average Remaining Maturity1 DerivativeAverageRemainingMaturity1	P4Y1M6D
CY2022Q3	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	12500000	usd
CY2021Q3	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-27700000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-5100000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-13600000	usd
CY2021	us-gaap	Interest Rate Cash Flow Hedge Gain Loss Reclassified To Earnings Net InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet	10000000	usd
CY2021	us-gaap	Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring	3600000	usd
CY2022	us-gaap	Derivative Instruments Gain Loss Reclassification From Accumulated Oci To Income Estimated Net Amount To Be Transferred DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred	-5800000	usd
CY2022Q3	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	12100000	usd
CY2021Q3	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	28000000	usd
CY2021	us-gaap	Loss On Discontinuation Of Cash Flow Hedge Due To Forecasted Transaction Probable Of Not Occurring LossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurring	3600000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Reclassification For Discontinuance Before Tax OtherComprehensiveIncomeLossCashFlowHedgeReclassificationForDiscontinuanceBeforeTax	4800000	usd
CY2022Q3	cffn	Fhl Bborrowingsthresholdpercentageofregulatoryassetstemporaryincrease FHLBborrowingsthresholdpercentageofregulatoryassetstemporaryincrease	0.50
CY2022Q3	cffn	Fhlb Percentage Of Regulatory Assets FhlbPercentageOfRegulatoryAssets	0.22
CY2022Q3	us-gaap	Line Of Credit LineOfCredit	75000000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due Within One Year Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate	329672000	usd
CY2022Q3	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1186742000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From One To Two Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate	519672000	usd
CY2022Q3	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	469700000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Two To Three Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate	479672000	usd
CY2022Q3	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	207145000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Three To Four Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate	404672000	usd
CY2022Q3	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	297133000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due From Four To Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate	227172000	usd
CY2022Q3	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	42395000	usd
CY2022Q3	us-gaap	Federal Home Loan Bank Advances Maturities Summary Due After Five Years Of Balance Sheet Date FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate	101640000	usd
CY2022Q3	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	638000	usd
CY2022Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	2062500000	usd
CY2022Q3	us-gaap	Interest Bearing Domestic Deposit Certificates Of Deposits InterestBearingDomesticDepositCertificatesOfDeposits	2203753000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17105000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17586000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17610000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3598000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4028000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4068000	usd
CY2022	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	20703000	usd
CY2021	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	21614000	usd
CY2020	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	21678000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1632000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1405000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-4857000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	415000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-263000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-731000	usd
CY2022	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	2047000	usd
CY2021	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	-1668000	usd
CY2020	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	-5588000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22750000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19946000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16090000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.212
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.208
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.200
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22513000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	20166000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16932000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3399000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3102000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.032
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2626000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033
CY2022	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	2238000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.021
CY2021	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	2085000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.021
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	1897000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.024
CY2022	cffn	Esop Related Expenses Net EsopRelatedExpensesNet	-641000	usd
CY2022	cffn	Effective Income Tax Rate Esop Related Expenses Net EffectiveIncomeTaxRateEsopRelatedExpensesNet	-0.006
CY2021	cffn	Esop Related Expenses Net EsopRelatedExpensesNet	-662000	usd
CY2021	cffn	Effective Income Tax Rate Esop Related Expenses Net EffectiveIncomeTaxRateEsopRelatedExpensesNet	-0.007
CY2020	cffn	Esop Related Expenses Net EsopRelatedExpensesNet	-525000	usd
CY2020	cffn	Effective Income Tax Rate Esop Related Expenses Net EffectiveIncomeTaxRateEsopRelatedExpensesNet	-0.006
CY2022	cffn	Income Tax Reconciliation Boli Income IncomeTaxReconciliationBOLIIncome	0	usd
CY2022	cffn	Effective Income Tax Rate Reconciliation Boli Income EffectiveIncomeTaxRateReconciliationBOLIIncome	0
CY2021	cffn	Income Tax Reconciliation Boli Income IncomeTaxReconciliationBOLIIncome	0	usd
CY2021	cffn	Effective Income Tax Rate Reconciliation Boli Income EffectiveIncomeTaxRateReconciliationBOLIIncome	0
CY2020	cffn	Income Tax Reconciliation Boli Income IncomeTaxReconciliationBOLIIncome	636000	usd
CY2020	cffn	Effective Income Tax Rate Reconciliation Boli Income EffectiveIncomeTaxRateReconciliationBOLIIncome	0.008
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-283000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-575000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-410000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	22750000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.212
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19946000	usd
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CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14800000	usd
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CY2021	cffn	Interchange Network Charges InterchangeNetworkCharges	3600000	usd
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CY2022	dei	Auditor Name AuditorName	Deloitte & Touche LLP
CY2022	dei	Auditor Location AuditorLocation	Kansas City, Missouri

Files In Submission

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$CFFN
Capitol Federal Financial, Inc. Stock $cffn

2022 Q4 Form 10-K Financial Statement

#000149090622000038 Filed on November 23, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CFFN Capitol Federal Financial, Inc. Stock $cffn

2022 Q4 Form 10-K Financial Statement

#000149090622000038 Filed on November 23, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CFFN
Capitol Federal Financial, Inc. Stock $cffn