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v2.4.1.9

Note 7 - Loans (Details) - Aging of Loan Portfolio (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | $ 27,746 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue | $ 36,359 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue
Loans, 60-89 Days Past Due | 1,788 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue | 5,879 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue
Loans, Greater than 90 Days Past Due | 787 us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue |
Non-accrual Loans | 80,324 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus | 70,163 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Loans, Past Due | 110,645 us-gaap_FinancingReceivableRecordedInvestmentPastDue | 112,401 us-gaap_FinancingReceivableRecordedInvestmentPastDue
Loans, Not Past Due | 9,114,152 caty_FinancingReceivableRecordedInvestmentNotInPastDue | 8,801,679 caty_FinancingReceivableRecordedInvestmentNotInPastDue
Loans | 9,224,797 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount | 8,914,080 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Loans, 30-59 Days Past Due | 3,530 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 11,595 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans, 60-89 Days Past Due | 50 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 1,238 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans, Greater than 90 Days Past Due | 787 us-gaap_FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember |
Non-accrual Loans | 12,086 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 6,983 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans, Past Due | 16,453 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 19,816 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans, Not Past Due | 2,418,097 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 2,362,677 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember
Loans | 2,434,550 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialLoansMember | 2,382,493 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 | 17,126 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 19,963 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember
Loans, Past Due | 17,126 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 21,379 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember
Loans, Not Past Due | 328,434 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 277,275 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember
Loans | 345,560 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_RealEstateConstructionLoansMember | 298,654 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 | 22,041 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 17,654 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans, 60-89 Days Past Due | 1,738 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 3,909 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Non-accrual Loans | 43,079 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 35,606 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans, Past Due | 66,858 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 57,169 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans, Not Past Due | 4,596,193 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 4,429,274 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember
Loans | 4,663,051 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_CommercialMortgageLoansMember | 4,486,443 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 | 2,175 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 5,634 us-gaap_FinancingReceivableRecordedInvestment30To59DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans, 60-89 Days Past Due |  | 732 us-gaap_FinancingReceivableRecordedInvestment60To89DaysPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Non-accrual Loans | 8,033 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 7,611 us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans, Past Due | 10,208 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 13,977 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans, Not Past Due | 1,766,058 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 1,728,961 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember
Loans | 1,776,266 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_ResidentialMortgageAndEquityLinesMember | 1,742,938 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
Loans, Past Due |  | 60 us-gaap_FinancingReceivableRecordedInvestmentPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember
Loans, Not Past Due | 5,370 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember | 3,492 caty_FinancingReceivableRecordedInvestmentNotInPastDue / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember
Loans | $ 5,370 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember | $ 3,552 us-gaap_LoansAndLeasesReceivableGrossCarryingAmount / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_InstallmentAndOtherLoansMember

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- Definition The financing receivable recorded investment not in past due. + References No definition available. + Details
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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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X
- 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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X
- 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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X
- 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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X
- 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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- 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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