Note 28 - Parent Company - Only Financial Statements - Condensed Statements of Cash Flows (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Aug. 06, 2015
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
Operating activities:                        
Net Income   $ 9,408 $ 9,374 $ 8,933 $ 8,321 $ (6,355) $ 7,496 $ 8,119 $ 7,494 $ 36,036 $ 16,754 $ 27,843
Adjustments to reconcile net income to net cash provided by operating activities:                        
Net amortization of investment premiums and discounts                   3,200 3,280 2,299
Stock based compensation cost                   1,713 1,441 1,256
Other, net                   (899) 1,049 2,822
Net cash provided by operating activities                   54,228 37,928 37,678
Investing activities:                        
Proceeds from maturity and paydowns of investment securities available for sale                   65,176 66,209 40,801
Acquisitions, net of cash acquired                   16,129 (4,125)
Financing activities:                        
Dividends paid                   (13,961) (13,837) (10,189)
Net proceeds from issuance of subordinated notes $ 29,500                 29,456
Net (purchase of) proceeds from sale of treasury stock for deferred compensation plans                   (133) (128) 79
Net purchase of treasury stock through publicly announced plans                   (7,971) (26,418) (947)
Proceeds from issuance of common stock                   20 72
Excess tax benefit from stock-based compensation                   783 831
Cash payments to taxing authorities on employees' behalf from shares withheld from stock-based compensation                   (745)
Proceeds from exercise of stock options                   2,181 6,452 2,836
Change in cash and cash equivalents                   (92,302) (76,202) 138,198
Cash and cash equivalents at beginning of period         143,067       219,269 143,067 219,269 81,071
Cash and cash equivalents at end of period   50,765       143,067       50,765 143,067 219,269
Parent Company [Member]                        
Operating activities:                        
Net Income                   36,036 16,754 27,843
Adjustments to reconcile net income to net cash provided by operating activities:                        
Equity in undistributed income of subsidiaries                   (17,600) 17,427 (15,480)
Net amortization of investment premiums and discounts                   151 121 98
Stock based compensation cost                   1,713 1,441 1,256
Other, net                   1,000 508 485
Net cash provided by operating activities                   21,300 36,251 14,202
Investing activities:                        
Investment in subsidiaries                   (15,000)
Proceeds from maturity and paydowns of investment securities available for sale                   16
Acquisitions, net of cash acquired                   128
Net cash (used in) provided by investing activities                   (15,000) 144
Financing activities:                        
Dividends paid                   (13,961) (13,837) (10,189)
Change in other borrowings                   (7,050)
Net proceeds from issuance of subordinated notes                   29,456
Net (purchase of) proceeds from sale of treasury stock for deferred compensation plans                   (133) (128) 79
Net purchase of treasury stock through publicly announced plans                   (7,971) (26,418) (947)
Proceeds from issuance of common stock                   20 72
Payment of contingent consideration for business combinations                  
Excess tax benefit from stock-based compensation                   783 831
Cash payments to taxing authorities on employees' behalf from shares withheld from stock-based compensation                   (745)
Proceeds from exercise of stock options                   2,181 6,452 2,836
Net cash used by financing activities                   (20,629) (3,672) (14,368)
Change in cash and cash equivalents                   (14,329) 32,723 (166)
Cash and cash equivalents at beginning of period         $ 37,992       $ 5,269 37,992 5,269 5,435
Cash and cash equivalents at end of period   $ 23,663       $ 37,992       $ 23,663 $ 37,992 $ 5,269