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Note 19 - Condensed Financial Information of Cathay General Bancorp - Statements of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Interest income | $ 130,668 | $ 124,155 | $ 121,902 | $ 122,345 | $ 119,519 | $ 116,867 | $ 112,386 | $ 104,934 |  |  |
Interest expense | 20,766 | 20,331 | 20,126 | 19,977 | 20,103 | 19,221 | 17,632 | 17,008 | $ 81,200 | $ 73,964 | $ 75,866
Non-interest expense | 53,503 | 50,737 | 68,879 | 51,571 | 53,533 | 57,471 | 47,585 | 44,131 | 224,690 | 202,720 | 174,313
Income tax (benefit)/expense | 16,345 | 15,808 | 12,273 | 22,675 | 16,787 | 12,098 | 9,738 | 21,364 | 67,101 | 59,987 | 81,965
Income before undistributed earnings of subsidiaries | 64,360 | 61,898 | 47,104 | 68,838 | 58,233 | 50,581 | 54,938 | 57,344 | 242,200 | 221,096 | 219,795
Net income | $ 48,015 | $ 46,090 | $ 34,831 | $ 46,163 | $ 41,446 | $ 38,483 | $ 45,200 | $ 35,980 | 175,099 | 161,109 | 137,830
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 48 | 68 | 88
Interest expense |  |  |  |  |  |  |  |  | 5,791 | 5,776 | 4,469
Non-interest (loss)/income |  |  |  |  |  |  |  |  | (488) | (1,858) | 10,144
Non-interest expense |  |  |  |  |  |  |  |  | 3,756 | 4,644 | 2,248
Income before income tax benefit |  |  |  |  |  |  |  |  | 104,411 | 151,091 | 33,515
Income tax (benefit)/expense |  |  |  |  |  |  |  |  | (4,199) | (5,134) | 1,478
Income before undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 108,610 | 156,225 | 32,037
Undistributed earnings of subsidiary |  |  |  |  |  |  |  |  | 66,489 | 4,884 | 105,793
Net income |  |  |  |  |  |  |  |  | 175,099 | 161,109 | 137,830
Parent Company [Member] | Cathay Bank [Member] |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  | 113,448 | 163,301 | 30,000
Parent Company [Member] | GBC Venture Capital [Member] |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  | $ 950 |  |

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- Definition The total amount of noninterest (loss) income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. + References No definition available. + Details
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