XML 63 R52.htm IDEA: XBRL DOCUMENT
v3.25.3

Note 8 - Loans - Amortized Cost of Modified Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Modified | $ 55,316 | $ 135 | $ 63,355 | $ 8,079
Commercial Portfolio Segment [Member] |  |  |  |
Modified | $ 15,919 | $ 135 | $ 19,727 | $ 7,858
Modification as a % of total loans | 0.50% | 0.00% | 0.61% | 0.25%
Weighted average rate reduction | 0.00% | 0.00% | 0.00% | 1.04%
Weighted average term increase (Year) | 4 months 24 days | 0 years | 1 year 1 month 6 days | 1 year 10 months 24 days
Weighted average payment deferral (Year) | 2 months 12 days | 7 months 6 days | 2 months 12 days | 1 month 6 days
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Modified | $ 2,060 |  | $ 6,074 |
Modification as a % of total loans | 0.02% |  | 0.06% |
Weighted average rate reduction | 0.00% |  | (0.91%) |
Weighted average term increase (Year) | 1 year |  | 2 years 1 month 6 days |
Weighted average payment deferral (Year) | 0 years |  | 6 months |
Residential Mortgage Loans [Member] |  |  |  |
Modified |  |  | $ 217 | $ 221
Modification as a % of total loans |  |  | 0.00% | 0.00%
Weighted average rate reduction |  |  | 0.00% | (0.18%)
Weighted average term increase (Year) |  |  | 0 years | 0 years
Weighted average payment deferral (Year) |  |  | 1 year 10 months 24 days | 2 years
Real Estate Construction Portfolio Segment [Member] |  |  |  |
Modified | $ 37,337 |  | $ 37,337 |
Modification as a % of total loans | 10.48% |  | 10.48% |
Weighted average rate reduction | (0.31%) |  | (0.31%) |
Weighted average term increase (Year) | 7 months 6 days |  | 7 months 6 days |
Weighted average payment deferral (Year) | 0 years |  | 0 years |
Extended Maturity [Member] |  |  |  |
Modified | $ 15,752 | $ 0 | $ 19,560 | $ 6,749
Extended Maturity [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Modified | 2,495 | 0 | 6,303 | 6,749
Extended Maturity [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Modified | 2,060 |  | 2,060 |
Extended Maturity [Member] | Residential Mortgage Loans [Member] |  |  |  |
Modified |  |  | 0 | 0
Extended Maturity [Member] | Real Estate Construction Portfolio Segment [Member] |  |  |  |
Modified | 11,197 |  | 11,197 |
Payment Deferral [Member] |  |  |  |
Modified | 0 | 135 | 0 | 356
Payment Deferral [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Modified | 0 | 135 | 0 | 135
Payment Deferral [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Modified | 0 |  | 0 |
Payment Deferral [Member] | Residential Mortgage Loans [Member] |  |  |  |
Modified |  |  | 0 | 221
Payment Deferral [Member] | Real Estate Construction Portfolio Segment [Member] |  |  |  |
Modified | 0 |  | 0 |
Reduction of Interest Rate and Change in Payment Terms [Member] |  |  |  |
Modified | 39,564 | 0 | 43,795 | 974
Reduction of Interest Rate and Change in Payment Terms [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Modified | 13,424 | $ 0 | 13,424 | 974
Reduction of Interest Rate and Change in Payment Terms [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Modified | 0 |  | 4,014 |
Reduction of Interest Rate and Change in Payment Terms [Member] | Residential Mortgage Loans [Member] |  |  |  |
Modified |  |  | 217 | $ 0
Reduction of Interest Rate and Change in Payment Terms [Member] | Real Estate Construction Portfolio Segment [Member] |  |  |  |
Modified | $ 26,140 |  | $ 26,140 |

X
- Definition Period of payment deferral in weighted average of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | caty_FinancingReceivableModifiedWeightedAveragePaymentDeferralFromModification
Namespace Prefix: | caty_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A + Details
Name: | us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A + Details
Name: | us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=caty_ResidentialMortgageLoansMember
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_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
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=caty_ReductionOfInterestRateAndChangeInPaymentTermsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |