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Note 21 - Condensed Financial Information of Cathay General Bancorp - Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | May 31, 2014
--- | --- | --- | --- | --- | ---
Assets |  |  |  |  |
Cash pledged as margin for interest rate swaps | $ 88,900 | $ 24,300 |  |  |
Equity securities | 22,158 | 22,319 |  |  |
Other assets | 250,069 | 195,403 |  |  |
Total assets | 21,947,976 | 20,886,723 |  |  |
Liabilities |  |  |  |  |
Junior subordinated debt | 119,136 | 119,136 |  |  | $ 119,100
Other liabilities | 307,031 | 180,543 |  |  |
Total liabilities | 19,473,936 | 18,440,472 |  |  |
Commitments and contingencies |  |  |  |  |
Stockholders' equity |  |  |  |  |
Common stock, $0.01 par value, 100,000,000 shares authorized, 91,090,614 issued and 72,742,151 outstanding at December 31, 2022, and 90,871,860 issued and 75,750,862 outstanding at December 31, 2021. | 911 | 909 |  |  |
Additional paid-in-capital | 981,119 | 972,474 |  |  |
Accumulated other comprehensive income/(loss), net | (102,295) | (3,065) |  |  |
Retained earnings | 2,244,856 | 1,985,168 |  |  |
Treasury stock, at cost (18,348,463 shares at December 31, 2022, and 15,120,998 shares at December 31, 2021) | (650,551) | (509,235) |  |  |
Total equity | 2,474,040 | 2,446,251 | $ 2,418,144 | $ 2,294,283 |
Total liabilities and equity | 21,947,976 | 20,886,723 |  |  |
Parent Company [Member] |  |  |  |  |
Assets |  |  |  |  |
Cash | 14,902 | 19,629 |  |  |
Cash pledged as margin for interest rate swaps | 0 | 1,071 |  |  |
Short-term certificates of deposit | 334 | 333 |  |  |
Equity securities | 16,360 | 15,627 |  |  |
Other assets | 4,385 | 4,691 |  |  |
Total assets | 2,603,011 | 2,573,008 |  |  |
Liabilities |  |  |  |  |
Junior subordinated debt | 119,136 | 119,136 |  |  |
Other liabilities | 9,835 | 7,621 |  |  |
Total liabilities | 128,971 | 126,757 |  |  |
Commitments and contingencies |  |  |  |  |
Stockholders' equity |  |  |  |  |
Common stock, $0.01 par value, 100,000,000 shares authorized, 91,090,614 issued and 72,742,151 outstanding at December 31, 2022, and 90,871,860 issued and 75,750,862 outstanding at December 31, 2021. | 911 | 909 |  |  |
Additional paid-in-capital | 981,119 | 972,474 |  |  |
Accumulated other comprehensive income/(loss), net | (102,295) | (3,065) |  |  |
Retained earnings | 2,244,856 | 1,985,168 |  |  |
Treasury stock, at cost (18,348,463 shares at December 31, 2022, and 15,120,998 shares at December 31, 2021) | (650,551) | (509,235) |  |  |
Total equity | 2,474,040 | 2,446,251 |  |  |
Total liabilities and equity | 2,603,011 | 2,573,008 |  |  |
Parent Company [Member] | Bank Subsidiaries [Member] |  |  |  |  |
Assets |  |  |  |  |
Investment in subsidiaries | 2,566,266 | 2,530,850 |  |  |
Non Bank Subsidiaries [Member] | Bank Subsidiaries [Member] |  |  |  |  |
Assets |  |  |  |  |
Investment in subsidiaries | $ 764 | $ 807 |  |  |

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