Note 19 - Parent Company Financial Statements (Detail) - Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jan. 09, 2009
Cash and cash equivalents	$ 95,855	$ 94,309	$ 182,056	$ 218,336
Other assets	38,787	39,946
Total assets	1,807,232	1,883,590
Dividends payable	188	188
Subordinated notes payable to unconsolidated trusts	48,970	48,970
Other liabilities	25,863	24,594
Total liabilities	1,639,211	1,726,533
Preferred stock	29,537	29,115			28,000
Common stock	934	931
Capital surplus	50,934	50,848
Retained earnings	79,747	69,520
Accumulated other comprehensive income	6,869	6,643
Total shareholders’ equity	168,021	157,057	149,896	147,227
Total liabilities and shareholders’ equity	1,807,232	1,883,590
Parent Company [Member]
Cash and cash equivalents	24,776	18,362	16,249	7,554
Investment in subsidiaries	196,406	192,486
Other assets	862	793
Total assets	222,044	211,641
Dividends payable	188	188
Subordinated notes payable to unconsolidated trusts	48,970	48,970
Other liabilities	4,865	5,426
Total liabilities	54,023	54,584
Preferred stock	29,537	29,115
Common stock	934	931
Capital surplus	50,934	50,848
Retained earnings	79,747	69,520
Accumulated other comprehensive income	6,869	6,643
Total shareholders’ equity	168,021	157,057
Total liabilities and shareholders’ equity	$ 222,044	$ 211,641