XML 119 R104.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Note 15 - Fair Value Measurements and Fair Value of Financial Instruments - Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Assets, fair value disclosure |  | $ 1,160,854 | $ 1,068,382 |
Total Losses |  | 1,172 | 7,836 | $ 848
Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 28,446 | 41,920 |
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Assets, fair value disclosure |  | 22,319 | 104,692 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Assets, fair value disclosure |  | 1,138,512 | 963,669 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 905 |
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Assets, fair value disclosure |  | 23 | 21 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 28,446 | 41,015 |
Impaired Loans [Member] |  |  |  |
Total Losses |  | 1,012 | 7,012 | 0
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 22,905 | 35,398 |
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 22,905 | 35,398 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Total Losses |  | 1,012 | 7,012 | 0
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 4,327 | 5,342 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 4,327 | 5,342 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Total Losses |  | 0 | 0 | 0
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 13,335 | 25,749 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 13,335 | 25,749 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |
Assets, fair value disclosure |  | 5,243 | 4,307 |
Total Losses |  | 0 | 0 | 0
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Assets, fair value disclosure |  | 5,243 | 4,307 |
Other Real Estate Owned [Member] |  |  |  |
Total Losses | [1] | 17 | 717 | 681
Other Real Estate Owned [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure | [1] | 4,589 | 5,141 |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure | [1] | 0 | 0 |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure | [1] | 0 | 905 |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure | [1] | 4,589 | 4,236 |
Investments in Venture Capital [Member] |  |  |  |
Total Losses |  | 143 | 107 | $ 167
Investments in Venture Capital [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 952 | 1,381 |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | 0 | 0 |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |
Assets, fair value disclosure |  | $ 952 | $ 1,381 |
[1] | Other real estate owned balance of $10.2 million in the Consolidated Balance Sheets is net of estimated disposal costs.

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2420-110228 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=caty_ImpairedLoansMember
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_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=caty_OtherRealEstateOwnedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=caty_InvestmentsInVentureCapitalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |