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Note 19 - Condensed Financial Information of Cathay General Bancorp - Balance Sheets (Details) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | May 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | --- | ---
Assets |  |  |  |  |  |
Cash pledged as margin for interest rate swaps | $ 6,900,000 |  |  |  |  |
Short-term certificates of deposit | 967,067,000 | $ 536,880,000 |  |  |  |
Securities available-for-sale (amortized cost of $1,317,012 in 2016 and $1,595,723 in 2015) | 1,314,345,000 | 1,586,352,000 | [1] |  |  |
Other assets | 117,902,000 | 147,284,000 |  |  |  |
Total assets | 14,520,769,000 | 13,254,126,000 |  |  |  |
Liabilities |  |  |  |  |  |
Junior subordinated debt | 119,136,000 |  |  |  | $ 119,100,000 |
Other liabilities | 168,524,000 | 144,197,000 |  |  |  |
Total liabilities | 12,692,230,000 | 11,506,348,000 |  |  |  |
Commitments and contingencies |  |  |  |  |  |
Stockholders' equity |  |  |  |  |  |
Common stock, $0.01 par value, 100,000,000 shares authorized, 87,820,920 issued and 79,610,277 outstanding at December 31, 2016, and 87,002,931 issued and 80,806,116 outstanding at December 31, 2015 | 878,000 | 870,000 |  |  |  |
Additional paid-in-capital | 895,480,000 | 880,822,000 |  |  |  |
Accumulated other comprehensive loss, net | (3,715,000) | (8,426,000) |  |  |  |
Retained earnings | 1,175,485,000 | 1,059,660,000 |  |  |  |
Treasury stock, at cost (8,210,643 shares at December 31, 2016, and 6,196,815 shares at December 31, 2015) | 239,589,000 | 185,148,000 |  |  |  |
Total stockholders' equity | 1,828,539,000 | 1,747,778,000 |  | $ 1,602,888,000 |  | $ 1,458,971,000
Total liabilities and stockholders' equity | 14,520,769,000 | 13,254,126,000 |  |  |  |
Parent Company [Member] |  |  |  |  |  |
Assets |  |  |  |  |  |
Cash | 34,596,000 | 5,048,000 |  |  |  |
Cash pledged as margin for interest rate swaps | 6,895,000 | 7,936,000 |  |  |  |
Short-term certificates of deposit | 325,000 | 24,324,000 |  |  |  |
Securities available-for-sale (amortized cost of $1,317,012 in 2016 and $1,595,723 in 2015) | 18,129,000 | 11,911,000 |  |  |  |
Other assets | 6,674,000 | 9,551,000 |  |  |  |
Total assets | 1,951,935,000 | 1,872,574,000 |  |  |  |
Liabilities |  |  |  |  |  |
Junior subordinated debt | 119,136,000 | 119,136,000 |  |  |  |
Other liabilities | 4,260,000 | 5,660,000 |  |  |  |
Total liabilities | 123,396,000 | 124,796,000 |  |  |  |
Commitments and contingencies |  |  |  |  |  |
Stockholders' equity |  |  |  |  |  |
Common stock, $0.01 par value, 100,000,000 shares authorized, 87,820,920 issued and 79,610,277 outstanding at December 31, 2016, and 87,002,931 issued and 80,806,116 outstanding at December 31, 2015 | 878,000 | 870,000 |  |  |  |
Additional paid-in-capital | 895,480,000 | 880,822,000 |  |  |  |
Accumulated other comprehensive loss, net | (3,715,000) | (8,426,000) |  |  |  |
Retained earnings | 1,175,485,000 | 1,059,660,000 |  |  |  |
Treasury stock, at cost (8,210,643 shares at December 31, 2016, and 6,196,815 shares at December 31, 2015) | (239,589,000) | (185,148,000) |  |  |  |
Total stockholders' equity | 1,828,539,000 | 1,747,778,000 |  |  |  |
Total liabilities and stockholders' equity | 1,951,935,000 | 1,872,574,000 |  |  |  |
Parent Company [Member] | Bank Subsidiaries [Member] |  |  |  |  |  |
Assets |  |  |  |  |  |
Investment in subsidiaries | 1,879,868,000 | 1,807,825,000 |  |  |  |
Parent Company [Member] | Non Bank Subsidiaries [Member] |  |  |  |  |  |
Assets |  |  |  |  |  |
Investment in subsidiaries | $ 5,448,000 | $ 5,979,000 |  |  |  |
[1] | Preferred stock of government sponsored entities and other equity securities as of December 31, 2015 were reclassified as level 1 rather than level 2 as originally classified due to the availability of quoted prices in active markets.

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