Note 8 - Loans and Allowance for Loan Losses (Details) - Activity In The Allowance For Loan Losses (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	$ 22,943	$ 27,113	$ 24,445	$ 28,264
Provision for loan losses	(586)	(256)	(1,580)	2,062
Recoveries	132	138	563	573
Loans charged off	(540)	(1,851)	(1,479)	(5,755)
Balance at End of Period	21,949	25,144	21,949	25,144
Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	20,240	24,221	22,254	23,538
Provision for loan losses	(528)	(1,114)	(2,028)	2,916
Recoveries	70	50	254	252
Loans charged off	(407)	(1,716)	(1,105)	(5,265)
Balance at End of Period	19,375	21,441	19,375	21,441
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	2,177	2,137	1,513	3,508
Provision for loan losses	(2)	591	615	(790)
Recoveries	25	8	122	129
Loans charged off	(98)	(36)	(148)	(147)
Balance at End of Period	2,102	2,700	2,102	2,700
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at Beginning of Period	526	755	678	1,218
Provision for loan losses	(56)	267	(167)	(64)
Recoveries	37	80	187	192
Loans charged off	(35)	(99)	(226)	(343)
Balance at End of Period	$ 472	$ 1,003	$ 472	$ 1,003