XML 88 R73.htm IDEA: XBRL DOCUMENT
v3.20.4

Note 4 - Loans - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Balance at beginning of year |  |  |  | $ 123,224 |  |  |  | $ 122,391 | $ 123,224 | $ 122,391 | $ 123,279
Provision/(reversal) for loan losses | $ (5,000) | $ 12,500 | $ 25,000 | 25,000 | $ (5,000) | $ (2,000) | $ 0 | 0 | 57,500 | (7,000) | (4,500)
Charge-offs |  |  |  |  |  |  |  |  | (21,996) | (6,997) | (3,206)
Recoveries |  |  |  |  |  |  |  |  | 7,810 | 14,830 | 6,818
Net (Charge-offs)/Recoveries |  |  |  |  |  |  |  |  | (14,186) | 7,833 |
Balance at end of year | 166,538 |  |  |  | 123,224 |  |  |  | 166,538 | 123,224 | 122,391
Reserve for impaired loans | 6,429 |  |  |  | 3,236 |  |  |  | 6,429 | 3,236 |
Reserve for non-impaired loans | 160,109 |  |  |  | 119,988 |  |  |  | 160,109 | 119,988 |
Reserve for off-balance sheet credit commitments | 5,880 |  |  |  | 3,855 |  |  |  | 5,880 | 3,855 |
Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 57,021 |  |  |  | 54,978 | 57,021 | 54,978 |
Provision/(reversal) for loan losses |  |  |  |  |  |  |  |  | 26,450 | 4,885 |
Charge-offs |  |  |  |  |  |  |  |  | (21,996) | (6,997) |
Recoveries |  |  |  |  |  |  |  |  | 7,267 | 4,155 |
Net (Charge-offs)/Recoveries |  |  |  |  |  |  |  |  | (14,729) | (2,842) |
Balance at end of year | 68,742 |  |  |  | 57,021 |  |  |  | 68,742 | 57,021 | 54,978
Reserve for impaired loans | 1,030 |  |  |  | 2,543 |  |  |  | 1,030 | 2,543 |
Reserve for non-impaired loans | 67,712 |  |  |  | 54,478 |  |  |  | 67,712 | 54,478 |
Reserve for off-balance sheet credit commitments | 4,802 |  |  |  | 2,301 |  |  |  | 4,802 | 2,301 |
Real Estate Construction Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 19,474 |  |  |  | 19,626 | 19,474 | 19,626 |
Provision/(reversal) for loan losses |  |  |  |  |  |  |  |  | 11,380 | (4,764) |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |
Recoveries |  |  |  |  |  |  |  |  | 0 | 4,612 |
Net (Charge-offs)/Recoveries |  |  |  |  |  |  |  |  | 0 | 4,612 |
Balance at end of year | 30,854 |  |  |  | 19,474 |  |  |  | 30,854 | 19,474 | 19,626
Reserve for impaired loans | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Reserve for non-impaired loans | 30,854 |  |  |  | 19,474 |  |  |  | 30,854 | 19,474 |
Reserve for off-balance sheet credit commitments | 690 |  |  |  | 1,047 |  |  |  | 690 | 1,047 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 33,602 |  |  |  | 33,487 | 33,602 | 33,487 |
Provision/(reversal) for loan losses |  |  |  |  |  |  |  |  | 15,164 | (5,216) |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |
Recoveries |  |  |  |  |  |  |  |  | 439 | 5,331 |
Net (Charge-offs)/Recoveries |  |  |  |  |  |  |  |  | 439 | 5,331 |
Balance at end of year | 49,205 |  |  |  | 33,602 |  |  |  | 49,205 | 33,602 | 33,487
Reserve for impaired loans | 5,254 |  |  |  | 473 |  |  |  | 5,254 | 473 |
Reserve for non-impaired loans | 43,951 |  |  |  | 33,129 |  |  |  | 43,951 | 33,129 |
Reserve for off-balance sheet credit commitments | 101 |  |  |  | 193 |  |  |  | 101 | 193 |
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | 13,108 |  |  |  | 14,282 | 13,108 | 14,282 |
Provision/(reversal) for loan losses |  |  |  |  |  |  |  |  | 4,525 | (1,906) |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |
Recoveries |  |  |  |  |  |  |  |  | 104 | 732 |
Net (Charge-offs)/Recoveries |  |  |  |  |  |  |  |  | 104 | 732 |
Balance at end of year | 17,737 |  |  |  | 13,108 |  |  |  | 17,737 | 13,108 | 14,282
Reserve for impaired loans | 145 |  |  |  | 220 |  |  |  | 145 | 220 |
Reserve for non-impaired loans | 17,592 |  |  |  | 12,888 |  |  |  | 17,592 | 12,888 |
Reserve for off-balance sheet credit commitments | 284 |  |  |  | 311 |  |  |  | 284 | 311 |
Installment and Other Loans [Member ] |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of year |  |  |  | $ 19 |  |  |  | $ 18 | 19 | 18 |
Provision/(reversal) for loan losses |  |  |  |  |  |  |  |  | (19) | 1 |
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 |
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 |
Net (Charge-offs)/Recoveries |  |  |  |  |  |  |  |  | 0 | 0 |
Balance at end of year | 0 |  |  |  | 19 |  |  |  | 0 | 19 | $ 18
Reserve for impaired loans | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Reserve for non-impaired loans | 0 |  |  |  | 19 |  |  |  | 0 | 19 |
Reserve for off-balance sheet credit commitments | $ 3 |  |  |  | $ 3 |  |  |  | $ 3 | $ 3 |

X
- Definition Financing Receivable, Allowance For Credit Losses, Net Charge-Offs + References No definition available. + Details
Name: | caty_FinancingReceivableAllowanceForCreditLossesNetChargeOffs
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Reserve For Off-Balance Sheet Credit Commitments + References No definition available. + Details
Name: | caty_ReserveForOffBalanceSheetCreditCommitments
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reserve To Impaired Loans + References No definition available. + Details
Name: | caty_ReserveToImpairedLoans
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reserve To Non-Impaired Loans + References No definition available. + Details
Name: | caty_ReserveToNonImpairedLoans
Namespace Prefix: | caty_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in allowance for credit loss on financing receivable from recovery. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_ProvisionForLoanLeaseAndOtherLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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=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=caty_ResidentialMortgageAndEquityLinesPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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