Note 3 - Loans and Allowance for Loan Losses (Details) - Activity in the Allowance for Loan Losses (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	$ 24,445	$ 28,264	$ 28,784
Provision for loan losses	(2,600)	2,772	13,487
Recoveries	703	1,045	1,346
Loans charged off	(1,971)	(7,636)	(15,353)
Balance at end of period	20,577	24,445	28,264
Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	22,254	23,538	24,527
Provision for loan losses	(2,432)	4,930	12,548
Recoveries	327	666	241
Loans charged off	(1,433)	(6,880)	(13,778)
Balance at end of period	18,716	22,254	23,538
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	1,513	3,508	3,260
Provision for loan losses	(2)	(1,825)	511
Recoveries	155	145	860
Loans charged off	(257)	(315)	(1,123)
Balance at end of period	1,409	1,513	3,508
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	678	1,218	997
Provision for loan losses	(166)	(333)	428
Recoveries	221	234	245
Loans charged off	(281)	(441)	(452)
Balance at end of period	$ 452	$ 678	$ 1,218