XML 73 R51.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Note 8 - Loans (Details) - Accruing Troubled Debt Restructurings - Accruing Troubled Debt Restructuring [Member] - USD ($) $ in Thousands | Sep. 30, 2015 | Jun. 30, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | --- | --- | ---
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | $ 89,881 | $ 100,011 | $ 104,356 | $ 123,089 | $ 111,136 | $ 117,597
Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 37,958 |  | 41,196 |  |  |
Contractual Interest Rate Reduction [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 7,065 |  | 26,694 |  |  |
Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 44,858 |  | 36,056 |  |  |
Rate Reduction and Forgiveness of Principal [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs |  |  | 410 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 12,872 |  | 16,506 |  |  |
Commercial Portfolio Segment [Member] | Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 11,010 |  | 11,572 |  |  |
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 1,862 |  | 4,934 |  |  |
Real Estate Construction Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 5,713 |  | 5,765 |  |  |
Real Estate Construction Portfolio Segment [Member] | Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs |  |  | 5,765 |  |  |
Real Estate Construction Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 5,713 |  |  |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 61,805 |  | 73,588 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 21,700 |  | 20,543 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 6,064 |  | 26,694 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 34,041 |  | 26,351 |  |  |
Residential Portfolio Segment [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 9,491 |  | 8,497 |  |  |
Residential Portfolio Segment [Member] | Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 5,248 |  | 3,316 |  |  |
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | 1,001 |  |  |  |  |
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs | $ 3,242 |  | 4,771 |  |  |
Residential Portfolio Segment [Member] | Rate Reduction and Forgiveness of Principal [Member] |  |  |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |  |  |
Accruing TDRs |  |  | $ 410 |  |  |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=caty_AccruingTroubledDebtRestructuringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_ContractualInterestRateReductionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=caty_RateReductionAndPaymentDeferralMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=caty_RateReductionAndForgivenessOfPrincipalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=caty_RealEstateConstructionPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |