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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 17,123	$ 22,943	$ 20,577	$ 24,445
Provision for loan losses	(1,536)	(586)	(2,792)	(1,580)
Recoveries	825	132	1,301	563
Loans charged off	(720)	(540)	(3,394)	(1,479)
Balance, end of period	15,692	21,949	15,692	21,949
Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	15,448	20,240	18,716	22,254
Provision for loan losses	(1,036)	(528)	(3,395)	(2,028)
Recoveries	114	70	471	254
Loans charged off	(436)	(407)	(1,702)	(1,105)
Balance, end of period	14,090	19,375	14,090	19,375
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	1,338	2,177	1,409	1,513
Provision for loan losses	(496)	(2)	634	615
Recoveries	691	25	736	122
Loans charged off	(230)	(98)	(1,476)	(148)
Balance, end of period	1,303	2,102	1,303	2,102
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	337	526	452	678
Provision for loan losses	(4)	(56)	(31)	(167)
Recoveries	20	37	94	187
Loans charged off	(54)	(35)	(216)	(226)
Balance, end of period	$ 299	$ 472	$ 299	$ 472