Note 19 - Parent Company Financial Statements (Details) - Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities
Net income	$ 13,446	$ 12,149	$ 2,738
Adjustments to reconcile net income to net cash provided by operating activities:
Noncash employee stock purchase plan expense	36	36	42
Deferred income tax (benefit) expense	(473)	(1,043)	(2,227)
Net cash provided by operating activities	24,023	28,410	28,062
Cash Flows From Investing Activities
Net cash used in investing activities	(53,286)	63,174	(53,006)
Cash Flows From Financing Activities
Dividends paid, preferred	(1,500)	(1,500)	(1,500)
Repurchase of common stock warrant	0	(75)	0
Shares issued under employee stock purchase plan	133	128	136
Net cash used in financing activities	1,661	(90,038)	(62,803)
Net increase in cash and cash equivalents	(27,602)	1,546	(87,747)
Cash and cash equivalents at beginning of year	95,855	94,309	182,056
Cash and cash equivalents at end of year	68,253	95,855	94,309
Bank Subsidiaries [Member] | Parent Company [Member]
Cash Flows From Investing Activities
Investment in bank subsidiaries	0	(2,500)	(4,000)
Parent Company [Member]
Cash Flows From Operating Activities
Net income	13,446	12,149	2,738
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed loss (income) of subsidiaries	473	(1,637)	500
Noncash employee stock purchase plan expense	4	3	3
Change in other assets and liabilities, net	(799)	(590)	1,253
Deferred income tax (benefit) expense	(62)	(64)	735
Net cash provided by operating activities	13,062	9,861	5,229
Cash Flows From Investing Activities
Return of equity from nonbank subsidiary	0	500	0
Proceeds from liquidation of company-owned life insurance	0	0	2,248
Net cash used in investing activities	0	(2,000)	(1,752)
Cash Flows From Financing Activities
Dividends paid, preferred	(1,500)	(1,500)	(1,500)
Repurchase of common stock warrant	0	(75)	0
Shares issued under employee stock purchase plan	133	128	136
Net cash used in financing activities	(1,367)	(1,447)	(1,364)
Net increase in cash and cash equivalents	11,695	6,414	2,113
Cash and cash equivalents at beginning of year	24,776	18,362	16,249
Cash and cash equivalents at end of year	$ 36,471	$ 24,776	$ 18,362