Note 7 - Loans and Allowance for Loan Losses (Details) - Activity In The Allowance For Loan Losses (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	$ 20,577	$ 24,445
Provision for loan losses	132	(632)
Recoveries	230	255
Loans charged off	(2,249)	(505)
Balance at End of Period	18,690	23,563
Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	18,716	22,254
Provision for loan losses	(756)	(652)
Recoveries	168	136
Loans charged off	(1,014)	(336)
Balance at End of Period	17,114	21,402
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	1,409	1,513
Provision for loan losses	925	(7)
Recoveries	27	83
Loans charged off	(1,160)	(31)
Balance at End of Period	1,201	1,558
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	452	678
Provision for loan losses	(37)	27
Recoveries	35	36
Loans charged off	(75)	(138)
Balance at End of Period	$ 375	$ 603