$CATY
CATHAY GENERAL BANCORP Stock $caty

$caty Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000143774923004952 Filed on February 28, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$9.960M		$42.18M
YoY Change	-94.21%		-93.67%
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	$2.054M	$3.111M	$9.958M
YoY Change	-2.75%	48.14%	25.16%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$92.95M		$117.6M
YoY Change	628.74%		71.02%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$115.4M	$131.3M	$472.5M
YoY Change	17.65%	33.14%	23.75%
Income Tax	$19.39M	$33.68M	$111.9M
% Of Pretax Income	16.8%	25.65%	23.68%
Net Earnings	$96.01M	$97.60M	$360.6M
YoY Change	28.01%	29.62%	20.9%
Net Earnings / Revenue	963.93%		855.03%
Basic Earnings Per Share	$1.32		$4.85
Diluted Earnings Per Share	$1.32	$1.328M	$4.830M
COMMON SHARES
Basic Shares Outstanding	72.56M	74.41M	74.34M
Diluted Shares Outstanding	72.90M		74.66M

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.133B	$1.162B
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	$123.1M	$124.4M	$124.4M
YoY Change	24.61%	25.15%	-2.04%
Goodwill	$375.7M	$375.7M
YoY Change	0.0%	0.94%
Intangibles	$5.564M	$5.757M
YoY Change	-25.93%	24.42%
Long-Term Investments
YoY Change
Other Assets			$101.5M
YoY Change			74.99%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$22.03B	$21.99B	$21.99B
YoY Change	5.58%	5.26%	5.26%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$32.60M	$32.52M	$32.52M
YoY Change	-7.92%	4.9%	4.9%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due	$0.00	$0.00	$0.00
YoY Change
Total Short-Term Liabilities	$32.60M	$32.52M	$32.52M
YoY Change	-7.92%	4.9%	4.9%
LONG-TERM LIABILITIES
Long-Term Debt	$141.6M	$141.7M	$141.7M
YoY Change	-0.44%	-0.19%	-0.19%
Other Long-Term Liabilities	$299.6M	$344.8M	$344.8M
YoY Change	66.76%	90.5%	90.5%
Total Long-Term Liabilities	$441.2M	$486.5M	$486.5M
YoY Change	37.07%	50.63%	50.63%
TOTAL LIABILITIES
Total Short-Term Liabilities	$32.60M	$32.52M	$32.52M
Total Long-Term Liabilities	$441.2M	$486.5M	$486.5M
Total Liabilities	$19.49B	$19.51B	$19.51B
YoY Change	5.67%	5.81%	5.81%
SHAREHOLDERS EQUITY
Retained Earnings	$2.316B	$2.245B
YoY Change	13.84%	13.08%
Common Stock	$911.0K	$911.0K
YoY Change	0.22%	0.22%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$650.6M
YoY Change		27.75%
Treasury Stock Shares		$18.35M
Shareholders Equity	$2.542B	$2.474B	$2.474B
YoY Change
Total Liabilities & Shareholders Equity	$22.03B	$21.99B	$21.99B
YoY Change	5.58%	5.26%	5.26%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$96.01M	$97.60M	$360.6M
YoY Change	28.01%	29.62%	20.9%
Depreciation, Depletion And Amortization	$2.054M	$3.111M	$9.958M
YoY Change	-2.75%	48.14%	25.16%
Cash From Operating Activities	$121.2M	$97.42M	$467.4M
YoY Change	40.15%	0.64%	39.8%
INVESTING ACTIVITIES
Capital Expenditures	$295.0K	$297.0K	$3.390M
YoY Change	-76.88%	-133.0%	-9.07%
Acquisitions	$0.00		$73.88M
YoY Change	-100.0%
Other Investing Activities	-$128.1M	-$197.1M	-$1.846B
YoY Change	-80.14%	-54.26%	115.61%
Cash From Investing Activities	-$128.4M	-$197.4M	-$1.849B
YoY Change	-80.14%	-54.28%	115.07%
FINANCING ACTIVITIES
Cash Dividend Paid	$24.61M		$101.0M
YoY Change	-3.57%		1.64%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$21.80M	-987.0K	$94.74M
YoY Change	-96.55%	-100.1%	-93.9%
NET CHANGE
Cash From Operating Activities	$121.2M	97.42M	$467.4M
Cash From Investing Activities	-$128.4M	-197.4M	-$1.849B
Cash From Financing Activities	-$21.80M	-987.0K	$94.74M
Net Change In Cash	-$29.07M	-100.9M	-$1.287B
YoY Change	-97.56%	-116.14%	-225.15%
FREE CASH FLOW
Cash From Operating Activities	$121.2M	$97.42M	$467.4M
Capital Expenditures	$295.0K	$297.0K	$3.390M
Free Cash Flow	$120.9M	$97.12M	$464.0M
YoY Change	41.9%	-0.59%	40.36%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	134141000	usd
CY2022Q4	caty	Short Term Investments And Interest Bearing Deposits ShortTermInvestmentsAndInterestBearingDeposits	966962000	usd
CY2021Q4	caty	Short Term Investments And Interest Bearing Deposits ShortTermInvestmentsAndInterestBearingDeposits	2315563000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1473348000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1127309000	usd
CY2022Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	18254024000	usd
CY2021Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	16342479000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	146485000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	136157000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-6641000	usd
CY2021Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-4321000	usd
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	18100898000	usd
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	16202001000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	22158000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	22319000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	17250000	usd
CY2022Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	4067000	usd
CY2021Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	4368000	usd
CY2022Q4	caty	Affordable Housing Investments And Alternative Energy Partnerships Net AffordableHousingInvestmentsAndAlternativeEnergyPartnershipsNet	327128000	usd
CY2021Q4	caty	Affordable Housing Investments And Alternative Energy Partnerships Net AffordableHousingInvestmentsAndAlternativeEnergyPartnershipsNet	299211000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	94776000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	99402000	usd
CY2022Q4	us-gaap	Due From Customer Acceptances DueFromCustomerAcceptances	2372000	usd
CY2021Q4	us-gaap	Due From Customer Acceptances DueFromCustomerAcceptances	8112000	usd
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	82428000	usd
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	56994000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	375696000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	372189000	usd
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1622173000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1126867000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	91090614
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	72742151
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	90871860
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	75750862
CY2022Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	18348463
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	15120998
CY2020Q4	caty	Number Of Limited Partnerships In Housing Investments NumberOfLimitedPartnershipsInHousingInvestments	10	pure
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	17300000	usd
CY2022Q4	caty	Variable Interest Entity Primary Beneficiary Number Of Entities VariableInterestEntityPrimaryBeneficiaryNumberOfEntities	10	pure
CY2022Q4	caty	Variable Interest Entity Primary Beneficiary Number Of Entities VariableInterestEntityPrimaryBeneficiaryNumberOfEntities	10	pure
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	pure
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Impaired Commitment To Lend LoansAndLeasesReceivableImpairedCommitmentToLend	0	usd
CY2021Q4	caty	Number Of Limited Partnerships Deemed To Be Variable Interest Entities NumberOfLimitedPartnershipsDeemedToBeVariableInterestEntities	10	pure
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	0	usd
CY2022Q4	us-gaap	Junior Subordinated Long Term Notes JuniorSubordinatedLongTermNotes	119100000	usd
CY2022Q4	us-gaap	Junior Subordinated Notes JuniorSubordinatedNotes	119136000	usd
CY2021Q4	us-gaap	Junior Subordinated Notes JuniorSubordinatedNotes	119136000	usd
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2022	caty	Minimum Number Of Years Allowed To Participate In Employee Stock Ownership Plan MinimumNumberOfYearsAllowedToParticipateInEmployeeStockOwnershipPlan	P2Y
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-31830
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	95-4274680
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	777 North Broadway
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Los Angeles
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	90012
CY2022	dei	City Area Code CityAreaCode	213
CY2021Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	2522442000	usd
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	3812724000	usd
CY2022	dei	Trading Symbol TradingSymbol	CATY
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	5757000	usd
CY2022	dei	Local Phone Number LocalPhoneNumber	625-4700
CY2022	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4627000	usd
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	2768182154	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	72556149
CY2022	dei	Auditor Name AuditorName	KPMG LLP
CY2022	dei	Auditor Location AuditorLocation	Los Angeles, California
CY2022	dei	Auditor Firm AuditorFirmId	185
CY2022	dei	Auditor Name AuditorName	KPMG LLP
CY2022	dei	Auditor Location AuditorLocation	Los Angeles, California
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	195440000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	29627000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	27834000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	250069000	usd
CY2021Q4	us-gaap	Other Assets OtherAssets	195403000	usd
CY2022Q4	us-gaap	Assets Assets	21947976000	usd
CY2021Q4	us-gaap	Assets Assets	20886723000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	4168989000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	17250000	usd
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CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1000460000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	915515000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	7013370000	usd
CY2021Q4	us-gaap	Time Deposits TimeDeposits	5517252000	usd
CY2022Q4	us-gaap	Deposits Deposits	18505279000	usd
CY2021Q4	us-gaap	Deposits Deposits	18058842000	usd
CY2022Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	485000000	usd
CY2021Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	20000000	usd
CY2022Q4	caty	Other Borrowings For Affordable Housing Investments OtherBorrowingsForAffordableHousingInvestments	22600000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	909000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	4492054000	usd
CY2022Q4	us-gaap	Deposits Negotiable Order Of Withdrawal Now DepositsNegotiableOrderOfWithdrawalNOW	2509736000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	981119000	usd
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	972474000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-102295000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-3065000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2244856000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1985168000	usd
CY2021Q4	caty	Other Borrowings For Affordable Housing Investments OtherBorrowingsForAffordableHousingInvestments	23145000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	119136000	usd
CY2021Q4	us-gaap	Long Term Debt LongTermDebt	119136000	usd
CY2022Q4	us-gaap	Bank Acceptances Executed And Outstanding BankAcceptancesExecutedAndOutstanding	2372000	usd
CY2021Q4	us-gaap	Bank Acceptances Executed And Outstanding BankAcceptancesExecutedAndOutstanding	8112000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	32518000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	30694000	usd
CY2022Q4	us-gaap	Other Liabilities OtherLiabilities	307031000	usd
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	180543000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	19473936000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	18440472000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	911000	usd
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CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	650551000	usd
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CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	649224000	usd
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CY2022	caty	Dividend Income From Federal Home Loan Bank Stock DividendIncomeFromFederalHomeLoanBankStock	1103000	usd
CY2021	caty	Dividend Income From Federal Home Loan Bank Stock DividendIncomeFromFederalHomeLoanBankStock	991000	usd
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CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	851281000	usd
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CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	700574000	usd
CY2022	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	56354000	usd
CY2021	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	40542000	usd
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CY2022	us-gaap	Interest Expense Other Domestic Deposits InterestExpenseOtherDomesticDeposits	48942000	usd
CY2021	us-gaap	Interest Expense Other Domestic Deposits InterestExpenseOtherDomesticDeposits	21259000	usd
CY2020	us-gaap	Interest Expense Other Domestic Deposits InterestExpenseOtherDomesticDeposits	25396000	usd
CY2022	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	5880000	usd
CY2021	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	1182000	usd
CY2020	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	5299000	usd
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CY2021	us-gaap	Interest Expense Other Long Term Debt InterestExpenseOtherLongTermDebt	5773000	usd
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CY2022	caty	Interest Expense Deferred Payments From Acquisition InterestExpenseDeferredPaymentsFromAcquisition	0	usd
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CY2022	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	862000	usd
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CY2020	us-gaap	Interest Expense Short Term Borrowings Excluding Federal Funds And Securities Sold Under Agreements To Repurchase InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase	234000	usd
CY2022	us-gaap	Interest Expense InterestExpense	117584000	usd
CY2021	us-gaap	Interest Expense InterestExpense	68756000	usd
CY2020	us-gaap	Interest Expense InterestExpense	148464000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	733697000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	597755000	usd
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	552110000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	14543000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-16008000	usd
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	57500000	usd
CY2022	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	719154000	usd
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	613763000	usd
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	494610000	usd
CY2022	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	392000	usd
CY2021	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-1426000	usd
CY2020	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	-1148000	usd
CY2022	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	0	usd
CY2021	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	853000	usd
CY2020	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	1695000	usd
CY2022	caty	Letter Of Credit Commissions LetterOfCreditCommissions	6351000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	54603000	usd
CY2020	us-gaap	Noninterest Income NoninterestIncome	42820000	usd
CY2022	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	142546000	usd
CY2021	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	132795000	usd
CY2020	us-gaap	Salaries Wages And Officers Compensation SalariesWagesAndOfficersCompensation	124022000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	22808000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	20318000	usd
CY2020	us-gaap	Occupancy Net OccupancyNet	20634000	usd
CY2022	us-gaap	Equipment Expense EquipmentExpense	13603000	usd
CY2021	us-gaap	Equipment Expense EquipmentExpense	13549000	usd
CY2021	caty	Letter Of Credit Commissions LetterOfCreditCommissions	7103000	usd
CY2020	caty	Letter Of Credit Commissions LetterOfCreditCommissions	6741000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	27112000	usd
CY2020	us-gaap	Equipment Expense EquipmentExpense	11133000	usd
CY2022	us-gaap	Professional Fees ProfessionalFees	28237000	usd
CY2021	us-gaap	Professional Fees ProfessionalFees	23666000	usd
CY2020	us-gaap	Professional Fees ProfessionalFees	21856000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	27433000	usd
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	20054000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	56814000	usd
CY2022	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	13181000	usd
CY2021	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	13607000	usd
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	14897000	usd
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	8037000	usd
CY2020	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	8999000	usd
CY2022	us-gaap	Marketing Expense MarketingExpense	6863000	usd
CY2021	us-gaap	Marketing Expense MarketingExpense	6913000	usd
CY2020	us-gaap	Marketing Expense MarketingExpense	5224000	usd
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	7132000	usd
CY2022	caty	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	127000	usd
CY2021	caty	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	343000	usd
CY2020	caty	Foreclosed Real Estate Expense Income ForeclosedRealEstateExpenseIncome	-3091000	usd
CY2022	caty	Operations Of Affordable Housing Investments Net And Alternative Energy Partnerships Net OperationsOfAffordableHousingInvestmentsNetAndAlternativeEnergyPartnershipsNet	42065000	usd
CY2021	caty	Operations Of Affordable Housing Investments Net And Alternative Energy Partnerships Net OperationsOfAffordableHousingInvestmentsNetAndAlternativeEnergyPartnershipsNet	45447000	usd
CY2020	caty	Operations Of Affordable Housing Investments Net And Alternative Energy Partnerships Net OperationsOfAffordableHousingInvestmentsNetAndAlternativeEnergyPartnershipsNet	58225000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1892000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	687000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	687000	usd
CY2022	caty	Debt Redemption Cost DebtRedemptionCost	0	usd
CY2021	caty	Debt Redemption Cost DebtRedemptionCost	732000	usd
CY2020	caty	Debt Redemption Cost DebtRedemptionCost	693000	usd
CY2022	caty	Business Combination Acquisition And Integration Costs BusinessCombinationAcquisitionAndIntegrationCosts	4127000	usd
CY2021	caty	Business Combination Acquisition And Integration Costs BusinessCombinationAcquisitionAndIntegrationCosts	1425000	usd
CY2020	caty	Business Combination Acquisition And Integration Costs BusinessCombinationAcquisitionAndIntegrationCosts	0	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	19946000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	19909000	usd
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	20186000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	303432000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	286523000	usd
CY2020	us-gaap	Noninterest Expense NoninterestExpense	283465000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	472536000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	381843000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	253965000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	111894000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	83539000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25105000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	360642000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	298304000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	228860000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-105043000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-11989000	usd
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	6486000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	5813000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	3614000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-3478000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-99230000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-8375000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3008000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	261412000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	289929000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	231868000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.85
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.81
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.88
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.83
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.80
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.87
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.36
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.27
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.24
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74337265
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	78268369
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	79584560
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74664735
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	78570638
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	79777847
CY2020	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	9777000	usd
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	2294283000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	1000	usd
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	2000	usd
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	1911000	usd
CY2020	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	800000	usd
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	23593000	usd
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5606000	usd
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	98688000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	3008000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	228860000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	2418144000	usd
CY2021	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3563000	usd
CY2021	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	2000	usd
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2632000	usd
CY2021	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	850000	usd
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	167104000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5960000	usd
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	99322000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-8375000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	298304000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	2446251000	usd
CY2022	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3719000	usd
CY2022	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	1000	usd
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2905000	usd
CY2022	us-gaap	Stock Issued During Period Value Issued For Services StockIssuedDuringPeriodValueIssuedForServices	849000	usd
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	141315000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6983000	usd
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	100955000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-99230000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	360642000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	2474040000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	360642000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	298304000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	228860000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	14543000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-16008000	usd
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	57500000	usd
CY2022	caty	Provision Reversal For Losses On Other Real Estate Owned ProvisionReversalForLossesOnOtherRealEstateOwned	0	usd
CY2021	caty	Provision Reversal For Losses On Other Real Estate Owned ProvisionReversalForLossesOnOtherRealEstateOwned	17000	usd
CY2020	caty	Provision Reversal For Losses On Other Real Estate Owned ProvisionReversalForLossesOnOtherRealEstateOwned	717000	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2088000	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-9168000	usd
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	9486000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	9958000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	7956000	usd
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	7660000	usd
CY2022	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	9845000	usd
CY2021	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	8160000	usd
CY2020	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	8852000	usd
CY2022	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-4629000	usd
CY2021	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2790000	usd
CY2020	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2389000	usd
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	6000	usd
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	57000	usd
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	4216000	usd
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	357000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	413000	usd
CY2022	caty	Proceeds From Sale Of Loans Operating Activities ProceedsFromSaleOfLoansOperatingActivities	33000	usd
CY2021	caty	Proceeds From Sale Of Loans Operating Activities ProceedsFromSaleOfLoansOperatingActivities	5351000	usd
CY2020	caty	Proceeds From Sale Of Loans Operating Activities ProceedsFromSaleOfLoansOperatingActivities	11098000	usd
CY2022	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	-0	usd
CY2022	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-67000	usd
CY2021	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	4994000	usd
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-55000	usd
CY2020	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	10685000	usd
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-45000	usd
CY2022	caty	Accretion Amortization Of Investments AccretionAmortizationOfInvestments	42065000	usd
CY2021	caty	Accretion Amortization Of Investments AccretionAmortizationOfInvestments	45447000	usd
CY2020	caty	Accretion Amortization Of Investments AccretionAmortizationOfInvestments	58131000	usd
CY2022	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	101000	usd
CY2021	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	853000	usd
CY2020	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	1695000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-2465000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-7865000	usd
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-8617000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	291000	usd
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-2036000	usd
CY2020	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-1148000	usd
CY2022	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	7832000	usd
CY2021	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	6810000	usd
CY2020	us-gaap	Employee Benefits And Share Based Compensation Noncash EmployeeBenefitsAndShareBasedCompensationNoncash	6406000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	80411000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	34196000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	21247000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	107467000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2403000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-18948000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	467390000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	334317000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	319955000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	711707000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	560140000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	434165000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	213936000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	424386000	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	734485000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	21102000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	117249000	usd
CY2022	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	553000	usd
CY2021	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	0	usd
CY2020	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	3112000	usd
CY2022	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	9776000	usd
CY2021	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	-0	usd
CY2020	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	840000	usd
CY2022	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	9776000	usd
CY2021	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	usd
CY2020	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	1680000	usd
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1272268000	usd
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	715862000	usd
CY2020	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	583136000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3390000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3728000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5778000	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	4013000	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	2752000	usd
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2022	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	307000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	769045000	usd
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	795000	usd
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	4308000	usd
CY2021	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	0	usd
CY2022	caty	Net Increase In Investment In Affordable Housing Investing And Alternative Energy Partnerships NetIncreaseInInvestmentInAffordableHousingInvestingAndAlternativeEnergyPartnerships	6995000	usd
CY2021	caty	Net Increase In Investment In Affordable Housing Investing And Alternative Energy Partnerships NetIncreaseInInvestmentInAffordableHousingInvestingAndAlternativeEnergyPartnerships	29229000	usd
CY2020	caty	Net Increase In Investment In Affordable Housing Investing And Alternative Energy Partnerships NetIncreaseInInvestmentInAffordableHousingInvestingAndAlternativeEnergyPartnerships	79119000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	73882000	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	usd
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	-0	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1849433000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-859924000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-242204000	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-128803000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1949728000	usd
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	1417310000	usd
CY2022	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	465000000	usd
CY2021	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	50000000	usd
CY2020	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	1450000000	usd
CY2022	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	-0	usd
CY2021	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	180000000	usd
CY2020	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	1970000000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	100955000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	99322000	usd
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	98688000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	141316000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	167104000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	23593000	usd
CY2022	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	-0	usd
CY2021	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	-0	usd
CY2020	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	25683000	usd
CY2022	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	-0	usd
CY2021	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	-0	usd
CY2020	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	7663000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	3720000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	3563000	usd
CY2020	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	9777000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2905000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2632000	usd
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1911000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	94741000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1554233000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	749549000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1287302000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1028626000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	827300000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2449704000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1421078000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	593778000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1162402000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2449704000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1421078000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	105521000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	75486000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	162434000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	96881000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	92691000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	45371000	usd
CY2022	caty	Net Change In Unrealized Holding Loss Gain On Securities Available For Sale Net Of Tax NetChangeInUnrealizedHoldingLossGainOnSecuritiesAvailableForSaleNetOfTax	-105042000	usd
CY2021	caty	Net Change In Unrealized Holding Loss Gain On Securities Available For Sale Net Of Tax NetChangeInUnrealizedHoldingLossGainOnSecuritiesAvailableForSaleNetOfTax	-11989000	usd
CY2021	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	3614000	usd
CY2020	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	-3478000	usd
CY2020	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	0	usd
CY2022	caty	Transfers To Other Real Estate Owned From Loans Held For Investment TransfersToOtherRealEstateOwnedFromLoansHeldForInvestment	0	usd
CY2021	caty	Transfers To Other Real Estate Owned From Loans Held For Investment TransfersToOtherRealEstateOwnedFromLoansHeldForInvestment	205000	usd
CY2020	caty	Net Change In Unrealized Holding Loss Gain On Securities Available For Sale Net Of Tax NetChangeInUnrealizedHoldingLossGainOnSecuritiesAvailableForSaleNetOfTax	6486000	usd
CY2022	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	5813000	usd
CY2020	caty	Transfers To Other Real Estate Owned From Loans Held For Investment TransfersToOtherRealEstateOwnedFromLoansHeldForInvestment	0	usd
CY2022	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	32000	usd
CY2020Q4	caty	Percentage Of Subsidiaries Common Securities Owned By Parent Company PercentageOfSubsidiariesCommonSecuritiesOwnedByParentCompany	1	pure
CY2022	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 18pt;"><i>Use of Estimates. </i>The preparation of the Consolidated Financial Statements in accordance with GAAP requires management of the Company to make several estimates and assumptions relating to the reported amount of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenues and expenses during the period. Actual results could differ from those estimates. The significant estimates subject to change relate to the allowance for credit losses.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2022	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family: Times New Roman; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 18pt;"><i>Concentrations. </i>The Bank was incorporated in California and started its business from California. Therefore, loans originated, and deposits solicited were mainly from California. As of <em style="font: inherit;"> December 31, 2022, </em>gross loans were primarily comprised of 48.2% of commercial mortgage loans, 28.8% of residential mortgage loans, and 18.2% of commercial loans. As of <em style="font: inherit;"> December 31, 2022, </em>approximately 47.3% of the Bank’s residential mortgages were for properties located in California.</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2022Q4	caty	Gross Loans Comprised Of Commercial Mortgage Loans Percentage GrossLoansComprisedOfCommercialMortgageLoansPercentage	0.482	pure
CY2022Q4	caty	Residential Mortgages Properties Percentage ResidentialMortgagesPropertiesPercentage	0.288	pure
CY2022Q4	caty	Gross Loans Comprised Of Commercial Loans Percentage GrossLoansComprisedOfCommercialLoansPercentage	0.182	pure
CY2021Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	17300000	usd
CY2022Q4	caty	Federal Home Loan Bank Stock Shares FederalHomeLoanBankStockShares	172500
CY2022Q4	caty	Minimum Stock Requirement On Outstanding Federal Home Loan Bank Borrowings Shares MinimumStockRequirementOnOutstandingFederalHomeLoanBankBorrowingsShares	150000
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1622173000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1473348000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	21100000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	117200000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	196616000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	168767000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	159448000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	928408000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	807234000	usd
CY2022	caty	Average Excess Balances Maintained With Federal Reserve Bank AverageExcessBalancesMaintainedWithFederalReserveBank	1240000000	usd
CY2021	caty	Average Excess Balances Maintained With Federal Reserve Bank AverageExcessBalancesMaintainedWithFederalReserveBank	1610000000	usd
CY2022Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	88900000	usd
CY2021Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	24300000	usd
CY2022Q4	us-gaap	Restricted Cash RestrictedCash	25400000	usd
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	690000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1622173000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	690000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	149515000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1473348000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1126867000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	11075000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	10633000	usd
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1127309000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	311603000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	310050000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	213395000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	39023000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	562156000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	101000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	853000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1700000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1331201000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	110492000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	149515000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	639985000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	28429000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	9198000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1435000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	668414000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	10633000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	22200000	usd
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	22300000	usd
CY2022	caty	Equity Securities Net Realized Loss From Decrease In Fair Value EquitySecuritiesNetRealizedLossFromDecreaseInFairValue	291000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	195	pure
CY2022Q4	caty	Pledged Investment Securities PledgedInvestmentSecurities	145700000	usd
CY2021Q4	caty	Pledged Investment Securities PledgedInvestmentSecurities	30500000	usd
CY2021	caty	Equity Securities Net Realized Loss From Decrease In Fair Value EquitySecuritiesNetRealizedLossFromDecreaseInFairValue	1400000	usd
CY2020	caty	Equity Securities Net Realized Loss From Decrease In Fair Value EquitySecuritiesNetRealizedLossFromDecreaseInFairValue	1100000	usd
CY2022Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	18254024000	usd
CY2021Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	16342479000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	146485000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	136157000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-6641000	usd
CY2021Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	-4321000	usd
CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	18100898000	usd
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	16202001000	usd
CY2022Q4	us-gaap	Servicing Asset ServicingAsset	181400000	usd
CY2021Q4	us-gaap	Servicing Asset ServicingAsset	141500000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	38532000	usd
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	51288000	usd
CY2022	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	25050000	usd
CY2021	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	29182000	usd
CY2022	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	30365000	usd
CY2021	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	41938000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	33217000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	38532000	usd
CY2022	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	71400000	usd
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	72700000	usd
CY2022	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	435000	usd
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1100000	usd
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1000000.0	usd
CY2022Q4	caty	Percentage Of Charge Off To Contractual Balances For Impaired Loans PercentageOfChargeOffToContractualBalancesForImpairedLoans	0.141	pure
CY2021Q4	caty	Percentage Of Charge Off To Contractual Balances For Impaired Loans PercentageOfChargeOffToContractualBalancesForImpairedLoans	0.107	pure
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	5	pure
CY2022	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	71371000	usd
CY2022	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	435000	usd
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	72740000	usd
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	1074000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	74673000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	54140000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	16539000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	14714000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3941000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	91212000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	68854000	usd
CY2022Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3941000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	46336000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	38401000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	38272000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	27445000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	4547000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	84608000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	65846000	usd
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	4547000	usd
CY2022	caty	Nonaccrual Portfolio Loans NonaccrualPortfolioLoans	68854000	usd
CY2021	caty	Nonaccrual Portfolio Loans NonaccrualPortfolioLoans	65846000	usd
CY2020	caty	Nonaccrual Portfolio Loans NonaccrualPortfolioLoans	67684000	usd
CY2022Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	18254024000	usd
CY2021Q4	us-gaap	Financing Receivable Before Allowance For Credit Loss And Fee FinancingReceivableBeforeAllowanceForCreditLossAndFee	16342479000	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	15	pure
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	11980000	usd
CY2021	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	2153000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	2153000	usd
CY2021	caty	Financing Receivables Impaired Troubled Debt Restructuring Specific Reserve FinancingReceivablesImpairedTroubledDebtRestructuringSpecificReserve	0	usd
CY2021	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	usd
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	5	pure
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	11946000	usd
CY2022	caty	Financing Receivables Impaired Troubled Debt Restructuring Specific Reserve FinancingReceivablesImpairedTroubledDebtRestructuringSpecificReserve	427000	usd
CY2022	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	usd
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	5417000	usd
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	5417000	usd
CY2020	caty	Financing Receivables Impaired Troubled Debt Restructuring Specific Reserve FinancingReceivablesImpairedTroubledDebtRestructuringSpecificReserve	0	usd
CY2020	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2905000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-99200000	usd
CY2022Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	3943040000	usd
CY2022Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	3489846000	usd
CY2022Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	1905136000	usd
CY2022Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	1908992000	usd
CY2022Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	1530238000	usd
CY2022Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	3138606000	usd
CY2022Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	2303152000	usd
CY2022Q4	us-gaap	Financing Receivable Revolving Converted To Term Loan FinancingReceivableRevolvingConvertedToTermLoan	28373000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	18247383000	usd
CY2022	caty	Financing Receivable Year One Originated Current Fiscal Year Allowance For Credit Loss Write Off FinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLossWriteOff	201000	usd
CY2022	caty	Financing Receivable Year Two Originated Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearTwoOriginatedAllowanceForCreditLossWriteOffAfterRecovery	587000	usd
CY2022	caty	Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	81000	usd
CY2022	caty	Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	-169000	usd
CY2022	caty	Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	3623000	usd
CY2022	caty	Financing Receivable Originated More Than Five Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	-33000	usd
CY2022	caty	Financing Receivable Revolving Allowance For Credit Loss Write Off After Recovery FinancingReceivableRevolvingAllowanceForCreditLossWriteOffAfterRecovery	-1689000	usd
CY2022	caty	Financing Receivable Revolving Converted To Term Loan Writeoff After Recovery FinancingReceivableRevolvingConvertedToTermLoanWriteoffAfterRecovery	-16000	usd
CY2022	caty	Financing Receivable Allowance For Credit Loss Writeoff After Recovery Net FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryNet	2585000	usd
CY2021Q4	us-gaap	Financing Receivable Originated In Current Fiscal Year FinancingReceivableOriginatedInCurrentFiscalYear	3731615000	usd
CY2021Q4	us-gaap	Financing Receivable Originated In Fiscal Year Before Latest Fiscal Year FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear	2371671000	usd
CY2021Q4	us-gaap	Financing Receivable Originated Two Years Before Latest Fiscal Year FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear	2361902000	usd
CY2021Q4	us-gaap	Financing Receivable Originated Three Years Before Latest Fiscal Year FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear	1885467000	usd
CY2021Q4	us-gaap	Financing Receivable Originated Four Years Before Latest Fiscal Year FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear	1344458000	usd
CY2021Q4	us-gaap	Financing Receivable Originated Five Or More Years Before Latest Fiscal Year FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear	2492497000	usd
CY2021Q4	us-gaap	Financing Receivable Revolving FinancingReceivableRevolving	2107052000	usd
CY2021Q4	us-gaap	Financing Receivable Revolving Converted To Term Loan FinancingReceivableRevolvingConvertedToTermLoan	43496000	usd
CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	16338158000	usd
CY2021	caty	Financing Receivable Year One Originated Current Fiscal Year Allowance For Credit Loss Write Off FinancingReceivableYearOneOriginatedCurrentFiscalYearAllowanceForCreditLossWriteOff	0	usd
CY2021	caty	Financing Receivable Year Two Originated Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearTwoOriginatedAllowanceForCreditLossWriteOffAfterRecovery	1477000	usd
CY2021	caty	Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	238000	usd
CY2021	caty	Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	242000	usd
CY2021	caty	Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	3000	usd
CY2021	caty	Financing Receivable Originated More Than Five Years Before Current Fiscal Year Allowance For Credit Loss Write Off After Recovery FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearAllowanceForCreditLossWriteOffAfterRecovery	-453000	usd
CY2021	caty	Financing Receivable Revolving Allowance For Credit Loss Write Off After Recovery FinancingReceivableRevolvingAllowanceForCreditLossWriteOffAfterRecovery	16168000	usd
CY2021	caty	Financing Receivable Revolving Converted To Term Loan Writeoff After Recovery FinancingReceivableRevolvingConvertedToTermLoanWriteoffAfterRecovery	-64000	usd
CY2021	caty	Financing Receivable Allowance For Credit Loss Writeoff After Recovery Net FinancingReceivableAllowanceForCreditLossWriteoffAfterRecoveryNet	17611000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	166538000	usd
CY2022	caty	Financing Receivable Allowance For Credit Losses Net Charge Offs FinancingReceivableAllowanceForCreditLossesNetChargeOffs	-2585000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	146485000	usd
CY2022Q4	caty	Investments In Affordable Housing And Alternative Energy Partnerships InvestmentsInAffordableHousingAndAlternativeEnergyPartnerships	327100000	usd
CY2021	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-11210000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	20054000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2443000	usd
CY2021	caty	Financing Receivable Allowance For Credit Losses Net Charge Offs FinancingReceivableAllowanceForCreditLossesNetChargeOffs	-17611000	usd
CY2021Q4	caty	Investments In Affordable Housing And Alternative Energy Partnerships InvestmentsInAffordableHousingAndAlternativeEnergyPartnerships	299200000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	136157000	usd
CY2022	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	12913000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	5490000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Time Deposit InterestExpenseDomesticDepositLiabilitiesTimeDeposit	111629000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	137025000	usd
CY2022Q4	caty	Affordable Housing Investments AffordableHousingInvestments	289920000	usd
CY2021Q4	caty	Affordable Housing Investments AffordableHousingInvestments	287517000	usd
CY2022Q4	caty	Other Borrowings From Consolidating Affordable Housing Equity Interest OtherBorrowingsFromConsolidatingAffordableHousingEquityInterest	22600000	usd
CY2021Q4	caty	Other Borrowings From Consolidating Affordable Housing Equity Interest OtherBorrowingsFromConsolidatingAffordableHousingEquityInterest	23145000	usd
CY2022Q4	caty	Other Liabilities From Affordablehousing Unfunded Commitments OtherLiabilitiesFromAffordablehousingUnfundedCommitments	133491000	usd
CY2021Q4	caty	Other Liabilities From Affordablehousing Unfunded Commitments OtherLiabilitiesFromAffordablehousingUnfundedCommitments	107652000	usd
CY2022Q4	caty	Alternative Energy Tax Credit Partnership Investments Net AlternativeEnergyTaxCreditPartnershipInvestmentsNet	37208000	usd
CY2021Q4	caty	Alternative Energy Tax Credit Partnership Investments Net AlternativeEnergyTaxCreditPartnershipInvestmentsNet	11694000	usd
CY2022	caty	Increase In Total Assets And Liabilities From Consolidating Affordable Housing Equity Interest IncreaseInTotalAssetsAndLiabilitiesFromConsolidatingAffordableHousingEquityInterest	31300000	usd
CY2021	caty	Increase In Total Assets And Liabilities From Consolidating Affordable Housing Equity Interest IncreaseInTotalAssetsAndLiabilitiesFromConsolidatingAffordableHousingEquityInterest	31100000	usd
CY2022Q4	caty	Alternative Energy Tax Credit Partnership Investments Net AlternativeEnergyTaxCreditPartnershipInvestmentsNet	37200000	usd
CY2021Q4	caty	Alternative Energy Tax Credit Partnership Investments Net AlternativeEnergyTaxCreditPartnershipInvestmentsNet	11700000	usd
CY2022Q4	caty	Alternative Energy Tax Credit Partnership Investments Held In Escrow AlternativeEnergyTaxCreditPartnershipInvestmentsHeldInEscrow	25400000	usd
CY2021Q4	caty	Alternative Energy Tax Credit Partnership Investments Held In Escrow AlternativeEnergyTaxCreditPartnershipInvestmentsHeldInEscrow	690000000	usd
CY2022Q4	caty	Affordable Housing Investments Scheduled Funding For Unfunded Commitments In Next12 Months AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInNext12Months	78897000	usd
CY2022Q4	caty	Affordable Housing Investments Scheduled Funding For Unfunded Commitments In Year Two AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearTwo	33154000	usd
CY2022Q4	caty	Affordable Housing Investments Scheduled Funding For Unfunded Commitments In Year Three AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearThree	14076000	usd
CY2022Q4	caty	Affordable Housing Investments Scheduled Funding For Unfunded Commitments In Year Four AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearFour	1678000	usd
CY2022Q4	caty	Affordable Housing Investments Scheduled Funding For Unfunded Commitments In Year Five AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsInYearFive	1533000	usd
CY2022Q4	caty	Affordable Housing Investments Scheduled Funding For Unfunded Commitments Thereafter AffordableHousingInvestmentsScheduledFundingForUnfundedCommitmentsThereafter	4153000	usd
CY2022Q4	caty	Other Liabilities From Affordablehousing Unfunded Commitments OtherLiabilitiesFromAffordablehousingUnfundedCommitments	133491000	usd
CY2022	caty	Affordable Housing And Other Tax Credits Recognized AffordableHousingAndOtherTaxCreditsRecognized	29524000	usd
CY2021	caty	Affordable Housing And Other Tax Credits Recognized AffordableHousingAndOtherTaxCreditsRecognized	26459000	usd
CY2020	caty	Affordable Housing And Other Tax Credits Recognized AffordableHousingAndOtherTaxCreditsRecognized	23273000	usd
CY2022	caty	Alternative Energy Tax Credit Usage AlternativeEnergyTaxCreditUsage	4707000	usd
CY2021	caty	Alternative Energy Tax Credit Usage AlternativeEnergyTaxCreditUsage	6337000	usd
CY2020	caty	Alternative Energy Tax Credit Usage AlternativeEnergyTaxCreditUsage	29706000	usd
CY2022Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	2300000	usd
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	141300000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.27
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.24
CY2022Q1	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	704927
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	208435000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	206218000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	113659000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	106816000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	94776000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	99402000	usd
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	8000000.0	usd
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	7700000	usd
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	7000000.0	usd
CY2022Q4	us-gaap	Goodwill Goodwill	375700000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	372200000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	1001000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1001000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	946000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	870000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	870000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	665000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5353000	usd
CY2022Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	46.67
CY2022Q1	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	32900000	usd
CY2021Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	125000000.0	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	4168989000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	4492054000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2509736000	usd
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2522442000	usd
CY2022Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	3812724000	usd
CY2021Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	4611579000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1000460000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	915515000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	7013370000	usd
CY2021Q4	us-gaap	Time Deposits TimeDeposits	5517252000	usd
CY2022Q4	us-gaap	Deposits Deposits	18505279000	usd
CY2021Q4	us-gaap	Deposits Deposits	18058842000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	6926121000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	79376000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	5094000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	591000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	2168000	usd
CY2022Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	20000	usd
CY2022Q4	us-gaap	Time Deposits At Carrying Value TimeDepositsAtCarryingValue	7013370000	usd
CY2022Q4	us-gaap	Deposit Liabilities Accrued Interest DepositLiabilitiesAccruedInterest	13200000	usd
CY2021Q4	us-gaap	Deposit Liabilities Accrued Interest DepositLiabilitiesAccruedInterest	1700000	usd
CY2020Q4	us-gaap	Deposit Liabilities Accrued Interest DepositLiabilitiesAccruedInterest	8500000	usd
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	8176000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	2249000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Demand InterestExpenseDomesticDepositLiabilitiesDemand	2816000	usd
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities Money Market InterestExpenseDomesticDepositLiabilitiesMoneyMarket	39913000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities Money Market InterestExpenseDomesticDepositLiabilitiesMoneyMarket	18241000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Money Market InterestExpenseDomesticDepositLiabilitiesMoneyMarket	21574000	usd
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities Savings InterestExpenseDomesticDepositLiabilitiesSavings	853000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities Savings InterestExpenseDomesticDepositLiabilitiesSavings	769000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Savings InterestExpenseDomesticDepositLiabilitiesSavings	1006000	usd
	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	2522538
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	105296000	usd
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities Time Deposit InterestExpenseDomesticDepositLiabilitiesTimeDeposit	56354000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities Time Deposit InterestExpenseDomesticDepositLiabilitiesTimeDeposit	40542000	usd
CY2021Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	2100000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	61801000	usd
CY2014Q1	caty	Amount Of Deferred Bonus Accrued In Other Liabilities AmountOfDeferredBonusAccruedInOtherLiabilities	300000	usd
CY2014Q1	caty	Accrued Interest On Deferred Bonus AccruedInterestOnDeferredBonus	0.0502	pure
CY2019Q1	caty	Accrued Interest On Deferred Bonus AccruedInterestOnDeferredBonus	0.0572	pure
CY2021Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	0	usd
CY2004Q4	caty	Threshold For Deferred Bonus ThresholdForDeferredBonus	225000000	usd
CY2004Q4	caty	Amount Of Deferred Bonus Accrued In Other Liabilities AmountOfDeferredBonusAccruedInOtherLiabilities	610000	usd
CY2004Q4	caty	Accrued Interest On Deferred Bonus AccruedInterestOnDeferredBonus	0.070	pure
CY2014Q4	caty	Accrued Interest On Deferred Bonus AccruedInterestOnDeferredBonus	0.0506	pure
CY2022	us-gaap	Interest Expense Other InterestExpenseOther	116000	usd
CY2021	us-gaap	Interest Expense Other InterestExpenseOther	110000	usd
CY2020	us-gaap	Interest Expense Other InterestExpenseOther	105000	usd
CY2021Q4	us-gaap	Junior Subordinated Long Term Notes JuniorSubordinatedLongTermNotes	119100000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	2450000000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	360600000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock Dividend Reinvestment Plan ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan	3700000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7000000.0	usd
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	108400000	usd
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	42.98
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	2470000000	usd
CY2022	us-gaap	Stockholders Equity Period Increase Decrease StockholdersEquityPeriodIncreaseDecrease	27800000	usd
CY2022	caty	Stockholders Equity Period Increase Decrease Percentage StockholdersEquityPeriodIncreaseDecreasePercentage	0.011	pure
CY2022	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	3227465
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	101000000.0	usd
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	1.36
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	141300000	usd
CY2022	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	43.79
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	79665000	usd
CY2022Q4	caty	Deferred Tax Liabilities Deferred Expense Loan Costs DeferredTaxLiabilitiesDeferredExpenseLoanCosts	10025000	usd
CY2021Q4	caty	Deferred Tax Liabilities Deferred Expense Loan Costs DeferredTaxLiabilitiesDeferredExpenseLoanCosts	9936000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	57029000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	29955000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2196000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	56953000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	44416000	usd
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	36787000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	113982000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	74371000	usd
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	34591000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1776000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5986000	usd
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3234000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-312000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3182000	usd
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-6252000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2088000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	9168000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-9486000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	111894000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	83539000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25105000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	47673000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	43895000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses	2591000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Bonuses DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses	4935000	usd
CY2022Q4	caty	Deferred Tax Assets Nonaccrual Interest DeferredTaxAssetsNonaccrualInterest	1572000	usd
CY2021Q4	caty	Deferred Tax Assets Nonaccrual Interest DeferredTaxAssetsNonaccrualInterest	1117000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	1975000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	2000000	usd
CY2022Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	6251000	usd
CY2021Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	4691000	usd
CY2022Q4	caty	Deferred Tax Assets Unrealized Loss On Interest Rate Swaps DeferredTaxAssetsUnrealizedLossOnInterestRateSwaps	0	usd
CY2021Q4	caty	Deferred Tax Assets Unrealized Loss On Interest Rate Swaps DeferredTaxAssetsUnrealizedLossOnInterestRateSwaps	1394000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	40400000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	9136000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	9136000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	5916000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	8732000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4711000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3765000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	120225000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2856000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3150000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	1364000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	-0	usd
CY2022Q4	caty	Deferred Tax Liabilities Unrealized Gain On Securities Available For Sale Net DeferredTaxLiabilitiesUnrealizedGainOnSecuritiesAvailableForSaleNet	-0	usd
CY2022Q4	caty	Deferred Tax Liabilities Dividends On Federal Home Loan Bank Common Stock DeferredTaxLiabilitiesDividendsOnFederalHomeLoanBankCommonStock	981000	usd
CY2021Q4	caty	Deferred Tax Liabilities Unrealized Gain On Securities Available For Sale Net DeferredTaxLiabilitiesUnrealizedGainOnSecuritiesAvailableForSaleNet	3823000	usd
CY2021Q4	caty	Deferred Tax Liabilities Dividends On Federal Home Loan Bank Common Stock DeferredTaxLiabilitiesDividendsOnFederalHomeLoanBankCommonStock	978000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3506000	usd
CY2022Q4	caty	Deferred Tax Liabilities Oreo Installment Sale DeferredTaxLiabilitiesOREOInstallmentSale	-0	usd
CY2021Q4	caty	Deferred Tax Liabilities Oreo Installment Sale DeferredTaxLiabilitiesOREOInstallmentSale	1273000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2168000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	83539000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	18732000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	21328000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	101493000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	58337000	usd
CY2022Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	9600000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Other DeferredTaxAssetsTaxCreditCarryforwardsOther	7500000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	1000000.0	usd
CY2022Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	16700000	usd
CY2021Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	41100000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	99233000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	80187000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	53333000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210	pure
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	44837000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.095	pure
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	37602000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.098	pure
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	23602000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.093	pure
CY2022	caty	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	-140000	usd
CY2022	caty	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Percentage EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitPercentage	0	pure
CY2021	caty	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	-20000	usd
CY2021	caty	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Percentage EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitPercentage	0	pure
CY2020	caty	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	264000	usd
CY2020	caty	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Percentage EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitPercentage	0.001	pure
CY2022	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	34231000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.072	pure
CY2021	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	32795000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.086	pure
CY2020	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	52979000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	0.208	pure
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	2195000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004	pure
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-1435000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.003	pure
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	885000	usd
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.003	pure
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	111894000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.237	pure
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.219	pure
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	25105000	usd
CY2021Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments With Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval	207800000	usd
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.099	pure
CY2022	us-gaap	Net Income Loss NetIncomeLoss	360642000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	298304000	usd
CY2022Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments With Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithRegulatoryApproval	296200000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0290	pure
CY2020	us-gaap	Net Income Loss NetIncomeLoss	228860000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	360642000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74337265
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.85
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	298304000	usd
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	78268369
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.81
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	228860000	usd
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	79584560
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.88
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	327470
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	302269
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	193287
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	360642000	usd
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74664735
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.83
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	298304000	usd
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	78570638
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.80
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	228860000	usd
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	79777847
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.87
CY2022Q4	us-gaap	Other Commitment OtherCommitment	3975541000	usd
CY2021Q4	us-gaap	Other Commitment OtherCommitment	3580504000	usd
CY2022Q4	caty	Commitments To Extend Notional Amount CommitmentsToExtendNotionalAmount	3630000000	usd
CY2022Q4	caty	Commitments To Fund Fixed Rate Loans CommitmentsToFundFixedRateLoans	93100000	usd
CY2022Q4	caty	Commitments To Fund Adjustable Rate Loans CommitmentsToFundAdjustableRateLoans	3540000000	usd
CY2021Q4	caty	Commitments To Extend Notional Amount CommitmentsToExtendNotionalAmount	3300000000	usd
CY2021Q4	caty	Commitments To Fund Fixed Rate Loans CommitmentsToFundFixedRateLoans	111400000	usd
CY2021Q4	caty	Commitments To Fund Adjustable Rate Loans CommitmentsToFundAdjustableRateLoans	3190000000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	29600000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	27800000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	32500000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	30700000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y4M24D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0261	pure
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CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	9900000	usd
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CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	22319000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	5900000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6000000.0	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	13100000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	11600000	usd
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	11700000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	1172000	usd
CY2022Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	52806000	usd
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CY2021Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1160854000	usd
CY2021Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	12969000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	10833000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	8415000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	5702000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4587000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2991000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1955000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	34483000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1965000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	32518000	usd
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CY2022	caty	Periodic Net Settlements On Interest Rate Swaps Income PeriodicNetSettlementsOnInterestRateSwapsIncome	3107000	usd
CY2021	caty	Periodic Net Settlements On Interest Rate Swaps Income PeriodicNetSettlementsOnInterestRateSwapsIncome	-9345000	usd
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CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	22158000	usd
CY2022Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1540447000	usd
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CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	1172000	usd
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CY2022Q4	caty	Foreign Currency Contract Asset Fair Value Loss Disclosure ForeignCurrencyContractAssetFairValueLossDisclosure	942000	usd
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CY2021Q4	caty	Foreign Currency Contract Asset Fair Value Loss Disclosure ForeignCurrencyContractAssetFairValueLossDisclosure	327000	usd
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CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	39074000	usd
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CY2022	caty	Noninteres Income Not Inscope NoninteresIncomeNotInscope	14635000	usd
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CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3600000	usd
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3700000	usd
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CY2022Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.1000	pure
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	2276830000	usd
CY2021Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	52000000.0	usd
CY2022Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	9000000.0	usd
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	8600000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M12D
CY2022	us-gaap	Stock Issued During Period Shares Dividend Reinvestment Plan StockIssuedDuringPeriodSharesDividendReinvestmentPlan	86501
CY2022	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3700000	usd
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CY2021	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	3600000	usd
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CY2020	us-gaap	Stock Issued During Period Value Dividend Reinvestment Plan StockIssuedDuringPeriodValueDividendReinvestmentPlan	9800000	usd
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CY2022Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.10	pure
CY2022Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.05	pure
CY2022Q4	caty	Common Equtiy Tier1 Capital CommonEqutiyTier1Capital	2276830000	usd
CY2022Q4	caty	Common Tier One Risk Based Capital To Risk Weighted Assets CommonTierOneRiskBasedCapitalToRiskWeightedAssets	0.1275	pure
CY2022Q4	caty	Banking Regulation Common Equity Tier One Riskbased Capital Capital Adequacy Minimum Including Capital Conservation Buffer BankingRegulationCommonEquityTierOneRiskbasedCapitalCapitalAdequacyMinimumIncludingCapitalConservationBuffer	1250461000	usd
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CY2022Q4	caty	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized	1161142000	usd
CY2022Q4	caty	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0650	pure
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	2276830000	usd
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1275	pure
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CY2022Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	1429098000	usd
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CY2022Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized TierOneLeverageCapitalRequiredToBeWellCapitalized	1081148000	usd
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CY2021Q4	caty	Common Tier One Risk Based Capital To Risk Weighted Assets CommonTierOneRiskBasedCapitalToRiskWeightedAssets	0.1332	pure
CY2021Q4	caty	Banking Regulation Common Equity Tier One Riskbased Capital Capital Adequacy Minimum Including Capital Conservation Buffer BankingRegulationCommonEquityTierOneRiskbasedCapitalCapitalAdequacyMinimumIncludingCapitalConservationBuffer	1123721000	usd
CY2021Q4	caty	Banking Regulation Common Equity Tier One Riskbased Capital Ratio Capital Adequacy Minimum Including Capital Conservation Buffer BankingRegulationCommonEquityTierOneRiskbasedCapitalRatioCapitalAdequacyMinimumIncludingCapitalConservationBuffer	0.0700	pure
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CY2021Q4	caty	Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0650	pure
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	2137925000	usd
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.1332	pure
CY2021Q4	caty	Banking Regulation Tier One Riskbased Capital Capital Adequacy Minimum Including Capital Conservation Buffer BankingRegulationTierOneRiskbasedCapitalCapitalAdequacyMinimumIncludingCapitalConservationBuffer	1364519000	usd
CY2021Q4	caty	Banking Regulation Tier One Riskbased Capital Ratio Capital Adequacy Minimum Including Capital Conservation Buffe BankingRegulationTierOneRiskbasedCapitalRatioCapitalAdequacyMinimumIncludingCapitalConservationBuffe	0.0850	pure
CY2021Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	1284253000	usd
CY2021Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.0800	pure
CY2021Q4	us-gaap	Capital Capital	2281182000	usd
CY2021Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.1421	pure
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CY2021Q4	caty	Banking Regulation Total Riskbased Capital Ratio Capital Adequacy Minimum Including Capital Conservation Buffer BankingRegulationTotalRiskbasedCapitalRatioCapitalAdequacyMinimumIncludingCapitalConservationBuffer	0.1050	pure
CY2021Q4	us-gaap	Capital Required To Be Well Capitalized CapitalRequiredToBeWellCapitalized	1605316000	usd
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CY2021Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	2137925000	usd
CY2021Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.1082	pure
CY2021Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy TierOneLeverageCapitalRequiredForCapitalAdequacy	790430000	usd
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CY2021Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized TierOneLeverageCapitalRequiredToBeWellCapitalized	988037000	usd
CY2021Q4	us-gaap	Tier One Leverage Capital Required To Be Well Capitalized To Average Assets TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets	0.0500	pure
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	90451000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	46008000	usd
CY2022Q4	caty	Net Amount Of Derivative Assets Presented In The Balance Sheet NetAmountOfDerivativeAssetsPresentedInTheBalanceSheet	44443000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	42930000	usd
CY2022Q4	caty	Net Amount Of Derivative Assets Presented In The Balance Sheet Not Offset NetAmountOfDerivativeAssetsPresentedInTheBalanceSheetNotOffset	1513000	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	51864000	usd
CY2022Q4	caty	Net Amount Of Derivative Liabilities Presented In The Balance Sheet NetAmountOfDerivativeLiabilitiesPresentedInTheBalanceSheet	51864000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	51864000	usd
CY2021Q4	us-gaap	Derivative Assets DerivativeAssets	10090000	usd
CY2021Q4	caty	Net Amount Of Derivative Assets Presented In The Balance Sheet NetAmountOfDerivativeAssetsPresentedInTheBalanceSheet	10090000	usd
CY2021Q4	caty	Net Amount Of Derivative Assets Presented In The Balance Sheet Not Offset NetAmountOfDerivativeAssetsPresentedInTheBalanceSheetNotOffset	10090000	usd
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	15748000	usd
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	3106000	usd
CY2021Q4	caty	Net Amount Of Derivative Liabilities Presented In The Balance Sheet NetAmountOfDerivativeLiabilitiesPresentedInTheBalanceSheet	12642000	usd
CY2021Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	12642000	usd

Files In Submission

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$CATY
CATHAY GENERAL BANCORP Stock $caty

2023 Q1 Form 10-K Financial Statement

#000143774923004952 Filed on February 28, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CATY CATHAY GENERAL BANCORP Stock $caty

2023 Q1 Form 10-K Financial Statement

#000143774923004952 Filed on February 28, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CATY
CATHAY GENERAL BANCORP Stock $caty