Note 20 - Parent Company Financial Statements (Details) - Condensed Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 120,493	$ 100,914	$ 68,253	$ 95,855
Other assets	35,460	36,896
Total assets	1,775,950	1,782,606
Liabilities
Dividends payable	0	113
Subordinated notes payable to unconsolidated trusts	48,970	48,970
Other liabilities	27,655	25,119
Total liabilities	1,600,252	1,609,677
Shareholders’ Equity
Preferred stock	0	10,000
Common stock	937	936
Capital surplus	51,608	51,344
Retained earnings	120,371	105,774
Accumulated other comprehensive income	2,782	4,875	(3,212)
Total shareholders’ equity	175,698	172,929
Total liabilities and shareholders’ equity	1,775,950	1,782,606
Parent Company [Member]
Assets
Cash and cash equivalents	35,964	32,086	$ 36,471	$ 24,776
Investment in subsidiaries	191,630	193,390
Other assets	1,243	1,074
Total assets	228,837	226,550
Liabilities
Dividends payable	0	113
Subordinated notes payable to unconsolidated trusts	48,970	48,970
Other liabilities	4,169	4,538
Total liabilities	53,139	53,621
Shareholders’ Equity
Preferred stock	0	10,000
Common stock	937	936
Capital surplus	51,608	51,344
Retained earnings	120,371	105,774
Accumulated other comprehensive income	2,782	4,875
Total shareholders’ equity	175,698	172,929
Total liabilities and shareholders’ equity	$ 228,837	$ 226,550