Note 20 - Parent Company Financial Statements - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash and cash equivalents	$ 113,534	$ 120,493	$ 100,914	$ 68,253
Other assets	38,026	35,460
Total assets	1,671,030	1,775,950
Dividends payable, common stock	751
Subordinated notes payable	33,506	48,970
Other liabilities	27,784	27,655
Total liabilities	1,486,964	1,600,252
Common stock	939	937
Capital surplus	51,885	51,608
Retained earnings	134,650	120,371
Accumulated other comprehensive (loss) income	(3,408)	2,782
Total liabilities and shareholders’ equity	1,671,030	1,775,950
Parent Company [Member]
Cash and cash equivalents	44,286	35,964	$ 32,086	$ 36,471
Investment in subsidiaries	175,935	191,630
Other assets	1,378	1,243
Total assets	221,599	228,837
Dividends payable, common stock	751
Subordinated notes payable	33,506	48,970
Other liabilities	3,276	4,169
Total liabilities	37,533	53,139
Common stock	939	937
Capital surplus	51,885	51,608
Retained earnings	134,650	120,371
Accumulated other comprehensive (loss) income	(3,408)	2,782
Total shareholders’ equity	184,066	175,698
Total liabilities and shareholders’ equity	$ 221,599	$ 228,837