XML 69 R57.htm IDEA: XBRL DOCUMENT
v3.20.2

Note 8 - Loans - Non-accrual Troubled Debt Restructurings (Details) - Non-accruing Troubled Debt Restructuring [Member] - USD ($) $ in Thousands | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | --- | --- | ---
Accruing TDRs | $ 12,670 | $ 17,889 | $ 18,048 | $ 22,457 | $ 23,301 | $ 24,189
Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs | 12,548 |  | 17,912 |  |  |
Contractual Interest Rate Reduction [Member] |  |  |  |  |  |
Accruing TDRs | 0 |  | 0 |  |  |
Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs | 122 |  | 136 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Accruing TDRs | 11,371 |  | 16,692 |  |  |
Commercial Portfolio Segment [Member] | Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs | 11,371 |  | 16,692 |  |  |
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |  |  |
Accruing TDRs | 0 |  | 0 |  |  |
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs | 0 |  | 0 |  |  |
Residential Portfolio Segment [Member] |  |  |  |  |  |
Accruing TDRs | 1,299 |  |  |  |  |
Residential Portfolio Segment [Member] | Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs | 1,177 |  |  |  |  |
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |  |  |
Accruing TDRs | 0 |  |  |  |  |
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs | $ 122 |  |  |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Accruing TDRs |  |  | 1,356 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs |  |  | 1,220 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] |  |  |  |  |  |
Accruing TDRs |  |  | 0 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member] |  |  |  |  |  |
Accruing TDRs |  |  | $ 136 |  |  |

X
- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&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_NonaccruingTroubledDebtRestructuringMember
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_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
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: |

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