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v2.4.1.9

Note 7 - Loans (Details) (USD $) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Note 7 - Loans (Details) [Line Items] |  |
Impaired Financing Receivable, Recorded Investment | $ 180,717,000 us-gaap_ImpairedFinancingReceivableRecordedInvestment | $ 174,519,000 us-gaap_ImpairedFinancingReceivableRecordedInvestment
Percentage of Charge-off to Contractual Balances for Impaired Loans | 17.00%caty_PercentageOfChargeOffToContractualBalancesForImpairedLoans | 17.10%caty_PercentageOfChargeOffToContractualBalancesForImpairedLoans
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | 0 us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1 |
Reduction of Stated Interest Rate [Member] | Minimum [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Troubled Debt Restructurings Length of Modifications | 7 months |
Reduction of Stated Interest Rate [Member] | Maximum [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Troubled Debt Restructurings Length of Modifications | 2 years |
Commercial Loans [Member] | Accruing Troubled Debt Restructuring [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Financing Receivable, Modifications, Recorded Investment | 16,722,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = caty_CommercialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_AccruingTroubledDebtRestructuringMember | 16,506,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = caty_CommercialLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_AccruingTroubledDebtRestructuringMember
Commercial Loans [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down | 598,000 us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = caty_CommercialLoansMember |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | 10,200,000 us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1 / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = caty_CommercialLoansMember |
Accruing Troubled Debt Restructuring [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Financing Receivable, Modifications, Recorded Investment | 100,400,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_AccruingTroubledDebtRestructuringMember | 104,300,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_AccruingTroubledDebtRestructuringMember
Allowance for Credit Losses, Change in Method of Calculating Impairment | 6,900,000 us-gaap_AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_AccruingTroubledDebtRestructuringMember | 6,500,000 us-gaap_AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_AccruingTroubledDebtRestructuringMember
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down | 148,000 us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_AccruingTroubledDebtRestructuringMember |
Non Accruing Troubled Debt Restructuring [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Financing Receivable, Modifications, Recorded Investment | 44,500,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_NonAccruingTroubledDebtRestructuringMember | 41,600,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_NonAccruingTroubledDebtRestructuringMember
Allowance for Credit Losses, Change in Method of Calculating Impairment | 2,100,000 us-gaap_AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_NonAccruingTroubledDebtRestructuringMember | 4,900,000 us-gaap_AllowanceForCreditLossesChangeInMethodOfCalculatingImpairment / caty_TroubledDebtRestructuringsByLoanStatusAxis = caty_NonAccruingTroubledDebtRestructuringMember
Nonaccrual Loans [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Impaired Financing Receivable, Recorded Investment | 80,300,000 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_NonaccrualLoansMember | 70,200,000 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_NonaccrualLoansMember
Accruing Troubled Debt Restructuring [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Impaired Financing Receivable, Recorded Investment | 100,400,000 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_AccruingTroubledDebtRestructuringMember |
Financing Receivable, Modifications, Recorded Investment | 100,393,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_AccruingTroubledDebtRestructuringMember | 104,356,000 us-gaap_FinancingReceivableModificationsRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_AccruingTroubledDebtRestructuringMember
Nonaccrual Loans Held for Sale [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Impaired Financing Receivable, Recorded Investment |  | $ 104,300,000 us-gaap_ImpairedFinancingReceivableRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = caty_NonaccrualLoansHeldForSaleMember
Minimum [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Period Loan is in Payment Default | 60 days |
Maximum [Member] |  |
Note 7 - Loans (Details) [Line Items] |  |
Period Loan is in Payment Default | 90 days |

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- Definition Percentage of charge-off to contractual balances for impaired loans. + References No definition available. + Details
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- Definition Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings. + References No definition available. + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524 + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953550-111524 + Details
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