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v2.4.1.9

Note 5 - Loans (Details) - Aging of Loan Portfolio (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | $ 36,359 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue | $ 30,821 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
Loans, 60-89 Days Past Due | 5,879 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue | 25,256 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Loans, Greater than 90 Days Past Due |  | 982 us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue
Non-accrual Loans | 70,163 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | 83,183 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Loans, Past Due | 112,401 us-gaap_FinancingReceivableRecordedInvestmentPastDue | 140,242 us-gaap_FinancingReceivableRecordedInvestmentPastDue
Loans, Not Past Due | 8,801,679 caty_FinancingReceivableRecordedInvestmentNotInPastDue | 7,944,321 caty_FinancingReceivableRecordedInvestmentNotInPastDue
Loans | 8,914,080 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | 8,084,563 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | 11,595 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 7,170 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans, 60-89 Days Past Due | 1,238 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 16,562 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Non-accrual Loans | 6,983 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 21,232 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans, Past Due | 19,816 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 44,964 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans, Not Past Due | 2,362,677 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 2,253,760 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans | 2,382,493 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 2,298,724 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Real Estate Construction Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | 1,416 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember |
Non-accrual Loans | 19,963 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 28,586 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember
Loans, Past Due | 21,379 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 28,586 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember
Loans, Not Past Due | 277,275 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 193,115 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember
Loans | 298,654 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 221,701 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember
Commercial Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | 17,654 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 20,043 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans, 60-89 Days Past Due | 3,909 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 7,862 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans, Greater than 90 Days Past Due |  | 982 us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Non-accrual Loans | 35,606 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 19,621 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans, Past Due | 57,169 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 48,508 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans, Not Past Due | 4,429,274 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 3,974,543 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans | 4,486,443 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 4,023,051 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Residential Mortgage And Equity Lines Member |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | 5,634 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 3,508 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans, 60-89 Days Past Due | 732 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 832 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Non-accrual Loans | 7,611 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 13,744 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans, Past Due | 13,977 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 18,084 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans, Not Past Due | 1,728,961 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 1,508,448 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans | 1,742,938 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 1,526,532 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Installment And Other Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | 60 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember | 100 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember
Loans, Past Due | 60 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember | 100 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember
Loans, Not Past Due | 3,492 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember | 14,455 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember
Loans | $ 3,552 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember | $ 14,555 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember

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- Definition Financing Receivable Recorded Investment Not In Past Due + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Financing receivables that are less than 60 days past due but more than 29 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
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- Definition Financing receivables that are less than 90 days past due but more than 59 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
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- Definition Financing receivables that are equal to or greater than 90 days past due. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
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- Definition Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5111-111524 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953401-111524 + Details
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- Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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- Details
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- Details
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- Details
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- Details
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