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Note 23 - Regulatory Matters (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] |
|  | Actual |  |  | Minimum Capital Required - Basel III |  |  | Required to be Considered Well Capitalized |
|  | Capital Amount |  |  | Ratio |  |  | Capital Amount |  |  | Ratio |  |  | Capital Amount |  |  | Ratio |
December 31, 2023 |  | (In thousands) |
Common Equity Tier 1 to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  | $ | 2,430,773 |  |  |  | 12.84 |  |  | $ | 1,325,277 |  |  |  | 7.00 |  |  | $ | 1,230,615 |  |  |  | 6.50 |
Cathay Bank |  |  | 2,501,439 |  |  |  | 13.23 |  |  |  | 1,323,846 |  |  |  | 7.00 |  |  |  | 1,229,286 |  |  |  | 6.50 |
Tier 1 Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  |  | 2,430,773 |  |  |  | 12.84 |  |  |  | 1,609,265 |  |  |  | 8.50 |  |  |  | 1,514,602 |  |  |  | 8.00 |
Cathay Bank |  |  | 2,501,439 |  |  |  | 13.23 |  |  |  | 1,607,527 |  |  |  | 8.50 |  |  |  | 1,512,967 |  |  |  | 8.00 |
Total Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  |  | 2,709,888 |  |  |  | 14.31 |  |  |  | 1,987,916 |  |  |  | 10.50 |  |  |  | 1,893,253 |  |  |  | 10.00 |
Cathay Bank |  |  | 2,665,054 |  |  |  | 14.09 |  |  |  | 1,985,769 |  |  |  | 10.50 |  |  |  | 1,891,209 |  |  |  | 10.00 |
Leverage Ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  |  | 2,430,773 |  |  |  | 10.55 |  |  |  | 921,473 |  |  |  | 4.00 |  |  |  | 1,151,841 |  |  |  | 5.00 |
Cathay Bank |  |  | 2,501,439 |  |  |  | 10.87 |  |  |  | 920,670 |  |  |  | 4.00 |  |  |  | 1,150,838 |  |  |  | 5.00 |
|  | Actual |  |  | Minimum Capital Required - Basel III |  |  | Required to be Considered Well Capitalized |
|  | Capital Amount |  |  | Ratio |  |  | Capital Amount |  |  | Ratio |  |  | Capital Amount |  |  | Ratio |
December 31, 2022 |  | (In thousands) |
Common Equity Tier 1 to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  | $ | 2,182,066 |  |  |  | 12.21 |  |  | $ | 1,250,914 |  |  |  | 7.00 |  |  | $ | 1,161,563 |  |  |  | 6.50 |
Cathay Bank |  |  | 2,276,830 |  |  |  | 12.75 |  |  |  | 1,250,461 |  |  |  | 7.00 |  |  |  | 1,161,142 |  |  |  | 6.50 |
Tier 1 Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  |  | 2,182,066 |  |  |  | 12.21 |  |  |  | 1,518,967 |  |  |  | 8.50 |  |  |  | 1,429,616 |  |  |  | 8.00 |
Cathay Bank |  |  | 2,276,830 |  |  |  | 12.75 |  |  |  | 1,518,417 |  |  |  | 8.50 |  |  |  | 1,429,098 |  |  |  | 8.00 |
Total Capital to Risk-Weighted Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  |  | 2,452,781 |  |  |  | 13.73 |  |  |  | 1,876,371 |  |  |  | 10.50 |  |  |  | 1,787,020 |  |  |  | 10.00 |
Cathay Bank |  |  | 2,432,045 |  |  |  | 13.61 |  |  |  | 1,875,691 |  |  |  | 10.50 |  |  |  | 1,786,373 |  |  |  | 10.00 |
Leverage Ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cathay General Bancorp |  |  | 2,182,066 |  |  |  | 10.08 |  |  |  | 865,470 |  |  |  | 4.00 |  |  |  | 1,081,838 |  |  |  | 5.00 |
Cathay Bank |  |  | 2,276,830 |  |  |  | 10.53 |  |  |  | 864,918 |  |  |  | 4.00 |  |  |  | 1,081,148 |  |  |  | 5.00 |

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