XML 68 R58.htm IDEA: XBRL DOCUMENT
v3.23.1

Note 9 - Loans - Loan Held for Investment by Loan Portfolio Segments, Internal Risk Ratings and Vintage Year (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Loans originated in current year | $ 725,864 |  | $ 3,943,040
Loans originated year prior | 3,890,115 |  | 3,489,846
Loans originated three years prior | 3,413,288 |  | 1,905,136
Loans originated four years prior | 1,846,427 |  | 1,908,992
Loans originated five years prior | 1,854,485 |  | 1,530,238
Total, Loans Amortized Cost Basis by Origination Year Prior | 4,392,896 |  | 3,138,606
Total, Revolving Loans | 2,161,920 |  | 2,303,152
Total, Revolving Converted to Term Loans | 26,472 |  | 28,373
Total loans | 18,311,467 |  | 18,247,383
Loans originated in current year, write offs | 0 |  | 211
Loans originated year prior, write offs | 170 |  | 587
Loans originated three years prior, write offs | 968 |  | 120
Loans originated four years prior, write offs | 145 |  | 71
Loans originated five years prior, write offs | 2,053 |  | 3,877
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 4,560 |  | 360
Total, Revolving Loans Write Offs | 11 |  | 264
Total, Revolving Converted to Term Loans, Write Offs | 0 |  | 0
YTD gross writeoffs | 7,907 | $ 221 | 5,490
Total loans | 18,311,467 |  | 18,247,383
Commercial Portfolio Segment [Member] |  |  |
Loans originated in current year | 62,760 |  | 489,985
Loans originated year prior | 464,215 |  | 464,093
Loans originated three years prior | 452,495 |  | 183,386
Loans originated four years prior | 164,011 |  | 125,786
Loans originated five years prior | 102,406 |  | 113,155
Total, Loans Amortized Cost Basis by Origination Year Prior | 202,772 |  | 117,988
Total, Revolving Loans | 1,698,264 |  | 1,816,937
Total, Revolving Converted to Term Loans | 6,051 |  | 6,693
Total loans | 3,152,974 |  | 3,318,023
Loans originated in current year, write offs | 0 |  | 96
Loans originated year prior, write offs | 164 |  | 587
Loans originated three years prior, write offs | 760 |  | 120
Loans originated four years prior, write offs | 145 |  | 71
Loans originated five years prior, write offs | 2,053 |  | 1,786
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 778 |  | 360
Total, Revolving Loans Write Offs | 11 |  | 202
Total, Revolving Converted to Term Loans, Write Offs | 0 |  | 0
YTD gross writeoffs | 3,911 | 221 | 3,222
Total loans | 3,152,974 |  | 3,318,023
Commercial Portfolio Segment [Member] | Pass [Member] |  |  |
Loans originated in current year | 62,760 |  | 488,748
Loans originated year prior | 462,944 |  | 446,647
Loans originated three years prior | 436,143 |  | 180,226
Loans originated four years prior | 161,289 |  | 119,355
Loans originated five years prior | 99,233 |  | 107,896
Total, Loans Amortized Cost Basis by Origination Year Prior | 191,552 |  | 106,649
Total, Revolving Loans | 1,631,086 |  | 1,753,509
Total, Revolving Converted to Term Loans | 5,231 |  | 6,560
Total loans | 3,050,238 |  | 3,209,590
Total loans | 3,050,238 |  | 3,209,590
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans originated in current year | 0 |  | 1,212
Loans originated year prior | 1,212 |  | 4,696
Loans originated three years prior | 3,822 |  | 2,818
Loans originated four years prior | 2,437 |  | 68
Loans originated five years prior | 0 |  | 308
Total, Loans Amortized Cost Basis by Origination Year Prior | 3,540 |  | 4,354
Total, Revolving Loans | 46,123 |  | 41,110
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 57,134 |  | 54,566
Total loans | 57,134 |  | 54,566
Commercial Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans originated in current year | 0 |  | 25
Loans originated year prior | 59 |  | 12,750
Loans originated three years prior | 12,530 |  | 342
Loans originated four years prior | 285 |  | 4,859
Loans originated five years prior | 3,173 |  | 2,766
Total, Loans Amortized Cost Basis by Origination Year Prior | 6,274 |  | 6,985
Total, Revolving Loans | 20,823 |  | 22,084
Total, Revolving Converted to Term Loans | 820 |  | 133
Total loans | 43,964 |  | 49,944
Total loans | 43,964 |  | 49,944
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |  |
Loans originated in current year | 0 |  | 0
Loans originated year prior | 0 |  | 0
Loans originated three years prior | 0 |  | 0
Loans originated four years prior | 0 |  | 1,504
Loans originated five years prior | 0 |  | 2,185
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,406 |  | 0
Total, Revolving Loans | 232 |  | 234
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 1,638 |  | 3,923
Total loans | 1,638 |  | 3,923
Real Estate Construction Portfolio Segment [Member] |  |  |
Loans originated in current year | 11,190 |  | 99,798
Loans originated year prior | 114,805 |  | 264,557
Loans originated three years prior | 250,438 |  | 122,761
Loans originated four years prior | 112,823 |  | 33,858
Loans originated five years prior | 32,068 |  | 35,321
Total, Loans Amortized Cost Basis by Origination Year Prior | 35,336 |  | 0
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 556,660 |  | 556,295
Loans originated in current year, write offs | 0 |  | 0
Loans originated year prior, write offs | 0 |  | 0
Loans originated three years prior, write offs | 0 |  | 0
Loans originated four years prior, write offs | 0 |  | 0
Loans originated five years prior, write offs | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 |  | 0
Total, Revolving Loans Write Offs | 0 |  | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 |  | 0
YTD gross writeoffs | 0 | (0) | 0
Total loans | 556,660 |  | 556,295
Real Estate Construction Portfolio Segment [Member] | Pass [Member] |  |  |
Loans originated in current year | 11,190 |  | 99,798
Loans originated year prior | 114,805 |  | 264,197
Loans originated three years prior | 249,947 |  | 113,312
Loans originated four years prior | 112,823 |  | 20,479
Loans originated five years prior | 18,429 |  | 3,067
Total, Loans Amortized Cost Basis by Origination Year Prior | 3,072 |  | 0
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 510,266 |  | 500,853
Total loans | 510,266 |  | 500,853
Real Estate Construction Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans originated in current year | 0 |  | 0
Loans originated year prior | 0 |  | 360
Loans originated three years prior | 491 |  | 9,449
Loans originated four years prior | 0 |  | 11,643
Loans originated five years prior | 11,903 |  | 22,945
Total, Loans Amortized Cost Basis by Origination Year Prior | 22,998 |  | 0
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 35,392 |  | 44,397
Total loans | 35,392 |  | 44,397
Real Estate Construction Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans originated in current year | 0 |  | 0
Loans originated year prior | 0 |  | 0
Loans originated three years prior | 0 |  | 0
Loans originated four years prior | 0 |  | 1,736
Loans originated five years prior | 1,736 |  | 9,309
Total, Loans Amortized Cost Basis by Origination Year Prior | 9,266 |  | 0
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 11,002 |  | 11,045
Total loans | 11,002 |  | 11,045
Commercial Real Estate Portfolio Segment [Member] |  |  |
Loans originated in current year | 387,087 |  | 2,122,120
Loans originated year prior | 2,111,921 |  | 1,793,483
Loans originated three years prior | 1,756,600 |  | 1,015,938
Loans originated four years prior | 998,326 |  | 1,146,596
Loans originated five years prior | 1,131,459 |  | 961,646
Total, Loans Amortized Cost Basis by Origination Year Prior | 2,341,376 |  | 1,566,608
Total, Revolving Loans | 184,470 |  | 182,347
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 8,911,239 |  | 8,788,738
Loans originated in current year, write offs | 0 |  | 0
Loans originated year prior, write offs | 0 |  | 0
Loans originated three years prior, write offs | 208 |  | 0
Loans originated four years prior, write offs | 0 |  | 0
Loans originated five years prior, write offs | 0 |  | 2,091
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 3,782 |  | 0
Total, Revolving Loans Write Offs | 0 |  | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 |  | 0
YTD gross writeoffs | 3,990 | (0) | 2,091
Total loans | 8,911,239 |  | 8,788,738
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Loans originated in current year | 387,087 |  | 2,087,650
Loans originated year prior | 2,077,494 |  | 1,728,607
Loans originated three years prior | 1,715,118 |  | 975,953
Loans originated four years prior | 958,330 |  | 1,094,505
Loans originated five years prior | 1,090,519 |  | 908,748
Total, Loans Amortized Cost Basis by Origination Year Prior | 2,176,822 |  | 1,420,982
Total, Revolving Loans | 181,831 |  | 178,116
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 8,587,201 |  | 8,394,561
Total loans | 8,587,201 |  | 8,394,561
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans originated in current year | 0 |  | 22,150
Loans originated year prior | 22,150 |  | 57,015
Loans originated three years prior | 29,121 |  | 25,593
Loans originated four years prior | 25,604 |  | 32,119
Loans originated five years prior | 21,038 |  | 17,999
Total, Loans Amortized Cost Basis by Origination Year Prior | 57,120 |  | 63,782
Total, Revolving Loans | 0 |  | 1,600
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 155,033 |  | 220,258
Total loans | 155,033 |  | 220,258
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans originated in current year | 0 |  | 12,320
Loans originated year prior | 12,277 |  | 7,861
Loans originated three years prior | 12,361 |  | 14,392
Loans originated four years prior | 14,392 |  | 19,972
Loans originated five years prior | 19,902 |  | 34,899
Total, Loans Amortized Cost Basis by Origination Year Prior | 107,434 |  | 81,844
Total, Revolving Loans | 2,639 |  | 2,631
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 169,005 |  | 173,919
Total loans | 169,005 |  | 173,919
Residential Portfolio Segment [Member] |  |  |
Loans originated in current year | 264,586 |  | 1,228,597
Loans originated year prior | 1,196,474 |  | 965,561
Loans originated three years prior | 950,977 |  | 583,051
Loans originated four years prior | 571,267 |  | 602,752
Loans originated five years prior | 588,552 |  | 420,116
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,813,412 |  | 1,454,010
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 5,385,268 |  | 5,254,087
Loans originated in current year, write offs | 0 |  | 0
Loans originated year prior, write offs | 0 |  | 0
Loans originated three years prior, write offs | 0 |  | 0
Loans originated four years prior, write offs | 0 |  | 0
Loans originated five years prior, write offs | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 |  | 0
Total, Revolving Loans Write Offs | 0 |  | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 |  | 0
YTD gross writeoffs | 0 |  | 0
Total loans | 5,385,268 |  | 5,254,087
Residential Portfolio Segment [Member] | Pass [Member] |  |  |
Loans originated in current year | 264,586 |  | 1,228,391
Loans originated year prior | 1,195,811 |  | 964,799
Loans originated three years prior | 950,229 |  | 580,990
Loans originated four years prior | 570,344 |  | 600,786
Loans originated five years prior | 586,635 |  | 417,565
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,800,951 |  | 1,444,320
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 5,368,556 |  | 5,236,851
Total loans | 5,368,556 |  | 5,236,851
Residential Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans originated in current year | 0 |  | 0
Loans originated year prior | 459 |  | 0
Loans originated three years prior | 0 |  | 33
Loans originated four years prior | 489 |  | 0
Loans originated five years prior | 678 |  | 752
Total, Loans Amortized Cost Basis by Origination Year Prior | 2,275 |  | 905
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 3,901 |  | 1,690
Total loans | 3,901 |  | 1,690
Residential Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans originated in current year | 0 |  | 206
Loans originated year prior | 204 |  | 762
Loans originated three years prior | 748 |  | 2,028
Loans originated four years prior | 434 |  | 1,966
Loans originated five years prior | 1,239 |  | 1,799
Total, Loans Amortized Cost Basis by Origination Year Prior | 10,186 |  | 8,785
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 12,811 |  | 15,546
Total loans | 12,811 |  | 15,546
Equity Lines Portfolio Segment [Member] |  |  |
Loans originated in current year | 0 |  | 748
Loans originated year prior | 127 |  | 0
Loans originated three years prior | 0 |  | 0
Loans originated four years prior | 0 |  | 0
Loans originated five years prior | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0
Total, Revolving Loans | 279,186 |  | 303,868
Total, Revolving Converted to Term Loans | 20,421 |  | 21,680
Total loans | 299,734 |  | 326,296
Loans originated in current year, write offs | 0 |  | 0
Loans originated year prior, write offs | 0 |  | 0
Loans originated three years prior, write offs | 0 |  | 0
Loans originated four years prior, write offs | 0 |  | 0
Loans originated five years prior, write offs | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 |  | 0
Total, Revolving Loans Write Offs | 0 |  | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 |  | 0
YTD gross writeoffs | 0 |  | 0
Total loans | 299,734 |  | 326,296
Equity Lines Portfolio Segment [Member] | Pass [Member] |  |  |
Loans originated in current year | 0 |  | 731
Loans originated year prior | 127 |  | 0
Loans originated three years prior | 0 |  | 0
Loans originated four years prior | 0 |  | 0
Loans originated five years prior | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0
Total, Revolving Loans | 277,548 |  | 302,825
Total, Revolving Converted to Term Loans | 20,217 |  | 21,460
Total loans | 297,892 |  | 325,016
Total loans | 297,892 |  | 325,016
Equity Lines Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans originated in current year | 0 |  | 5
Loans originated year prior | 0 |  | 0
Loans originated three years prior | 0 |  | 0
Loans originated four years prior | 0 |  | 0
Loans originated five years prior | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0
Total, Revolving Loans | 11 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 11 |  | 5
Total loans | 11 |  | 5
Equity Lines Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans originated in current year | 0 |  | 12
Loans originated year prior | 0 |  | 0
Loans originated three years prior | 0 |  | 0
Loans originated four years prior | 0 |  | 0
Loans originated five years prior | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0
Total, Revolving Loans | 1,627 |  | 1,043
Total, Revolving Converted to Term Loans | 204 |  | 220
Total loans | 1,831 |  | 1,275
Total loans | 1,831 |  | 1,275
Installment and Other Loans [Member ] |  |  |
Loans originated in current year | 241 |  | 1,792
Loans originated year prior | 2,573 |  | 2,152
Loans originated three years prior | 2,778 |  | 0
Loans originated four years prior | 0 |  | 0
Loans originated five years prior | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 5,592 |  | 3,944
Loans originated in current year, write offs | 0 |  | 115
Loans originated year prior, write offs | 6 |  | 0
Loans originated three years prior, write offs | 0 |  | 0
Loans originated four years prior, write offs | 0 |  | 0
Loans originated five years prior, write offs | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 |  | 0
Total, Revolving Loans Write Offs | 0 |  | 62
Total, Revolving Converted to Term Loans, Write Offs | 0 |  | 0
YTD gross writeoffs | 6 | $ (0) | 177
Total loans | 5,592 |  | 3,944
Installment and Other Loans [Member ] | Pass [Member] |  |  |
Loans originated in current year | 241 |  | 1,792
Loans originated year prior | 2,573 |  | 2,152
Loans originated three years prior | 2,778 |  | 0
Loans originated four years prior | 0 |  | 0
Loans originated five years prior | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0
Total, Revolving Loans | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0
Total loans | 5,592 |  | 3,944
Total loans | $ 5,592 |  | $ 3,944

X
- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(3) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of revolving financing receivable converted to term loan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6A + Details
Name: | us-gaap_FinancingReceivableRevolvingConvertedToTermLoan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of writeoff of revolving financing receivable converted to term loan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6A + Details
Name: | us-gaap_FinancingReceivableRevolvingConvertedToTermLoanWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable that can be withdrawn, repaid, and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableRevolvingWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableYearOneOriginatedCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 + Details
Name: | us-gaap_FinancingReceivableYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) -Publisher SEC Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7A -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
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: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=caty_EquityLinesPortfolioSegmentMember
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: |