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Note 19 - Condensed Financial Information of Cathay General Bancorp - Statements of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net income | $ 25,940 | $ 49,746 | $ 51,415 | $ 48,941 | $ 48,015 | $ 46,090 | $ 34,831 | $ 46,163 | $ 176,042 | $ 175,099 | $ 161,109
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Write-downs on venture capital and other investments |  |  |  |  |  |  |  |  | 4,572 | 28,897 | 25,058
Write-down on impaired securities |  |  |  |  |  |  |  |  |  | 206 | 3,875
Stock issued to directors as compensation |  |  |  |  |  |  |  |  | 5,734 | 4,963 | 4,950
Net change in other assets |  |  |  |  |  |  |  |  | 25,747 | 13,478 | (3,429)
Net change in other liabilities |  |  |  |  |  |  |  |  | (2,641) | (2,784) | (15,506)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 248,874 | 234,402 | 176,697
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of investment securities available-for-sale |  |  |  |  |  |  |  |  | 111,704 | 294 | 385,234
Purchase of available-for-sale securities |  |  |  |  |  |  |  |  | (339,814) | (941,327) | (295,497)
Acquisitions, net of cash acquired |  |  |  |  |  |  |  |  | (118,392) |  | 6,572
Net cash (used in)/provided by investment activities |  |  |  |  |  |  |  |  | (224,665) | (1,283,679) | (1,177,571)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of long-term debt and other borrowings |  |  |  |  |  |  |  |  | 75,000 |  |
Cash dividends |  |  |  |  |  |  |  |  | (69,888) | (59,274) | (45,283)
Proceeds from exercise of stock options |  |  |  |  |  |  |  |  | 1,094 | 7,661 | 5,014
Taxes paid related to net share settlement of RSUs |  |  |  |  |  |  |  |  | (5,128) | (103) | (227)
Excess tax short-fall from share-based payment arrangements |  |  |  |  |  |  |  |  |  |  | (5,348)
Purchase of treasury stock |  |  |  |  |  |  |  |  |  | (54,441) | (59,412)
Net cash used in financing activities |  |  |  |  |  |  |  |  | 4,830 | 1,087,164 | 1,004,174
Increase/(Decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 29,039 | 37,887 | 3,300
Cash and cash equivalents, beginning of the year |  |  |  | 218,017 |  |  |  | 180,130 | 218,017 | 180,130 | 176,830
Cash and cash equivalents, end of the year | 247,056 |  |  |  | 218,017 |  |  |  | 247,056 | 218,017 | 180,130
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 176,042 | 175,099 | 161,109
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |
Equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 88,247 | (67,770) | (4,884)
Dividends in excess of earnings of non-bank subsidiaries |  |  |  |  |  |  |  |  |  | 1,281 |
Write-downs on venture capital and other investments |  |  |  |  |  |  |  |  | 254 | 503 | 468
Write-down on impaired securities |  |  |  |  |  |  |  |  |  | 206 |
Loss in fair value of warrants |  |  |  |  |  |  |  |  | (12) | (17) |
Stock issued to directors as compensation |  |  |  |  |  |  |  |  | 550 | 550 | 495
Excess tax short-fall from stock options |  |  |  |  |  |  |  |  |  |  | 5,348
Net change in other assets |  |  |  |  |  |  |  |  | (2,138) | (1,136) | 619
Net change in other liabilities |  |  |  |  |  |  |  |  | 5,949 | (756) | (5,438)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 268,892 | 107,960 | 157,717
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |
(Increase)/decrease in short-term investment |  |  |  |  |  |  |  |  | (2) | 23,999 | (1,121)
Proceeds from sale of investment securities available-for-sale |  |  |  |  |  |  |  |  | 12,580 | 294 |
Purchase of available-for-sale securities |  |  |  |  |  |  |  |  | (2,759) |  | (410)
Venture capital and other investments |  |  |  |  |  |  |  |  | 671 | 134 |
Acquisitions, net of cash acquired |  |  |  |  |  |  |  |  | (275,328) |  | (57,006)
Net cash (used in)/provided by investment activities |  |  |  |  |  |  |  |  | (264,838) | 24,427 | (58,537)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of long-term debt and other borrowings |  |  |  |  |  |  |  |  | 75,000 |  |
Cash dividends |  |  |  |  |  |  |  |  | (69,888) | (59,274) | (45,283)
Proceeds from shares issued under the Dividend Reinvestment Plan |  |  |  |  |  |  |  |  | 2,528 | 2,277 | 4,175
Proceeds from exercise of stock options |  |  |  |  |  |  |  |  | 1,094 | 7,661 | 5,014
Taxes paid related to net share settlement of RSUs |  |  |  |  |  |  |  |  | (5,128) | (103) | (227)
Excess tax short-fall from share-based payment arrangements |  |  |  |  |  |  |  |  |  |  | (5,348)
Purchase of treasury stock |  |  |  |  |  |  |  |  |  | (54,441) | (59,412)
Net cash used in financing activities |  |  |  |  |  |  |  |  | 3,606 | (103,880) | (101,081)
Increase/(Decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 7,660 | 28,507 | (1,901)
Cash and cash equivalents, beginning of the year |  |  |  | $ 41,491 |  |  |  | $ 12,984 | 41,491 | 12,984 | 14,885
Cash and cash equivalents, end of the year | $ 49,151 |  |  |  | $ 41,491 |  |  |  | $ 49,151 | $ 41,491 | $ 12,984

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- Definition The sum of the periodic adjustments of the differences between investments' face values and purchase prices that are charged against earnings. This is called accretion if the investment was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method. + References No definition available. + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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