Note 4 - Loans and Allowance for Loan Losses (Details) - Activity in the Allowance for Loan Losses - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2015
Balance, beginning of period	$ 13,968	$ 20,577	$ 24,445
Provision for loan losses	(3,429)	(4,364)	(2,600)
Recoveries	785	1,507	703
Loans charged off	(1,009)	(3,752)	(1,971)
Balance, end of period	10,315	13,968	20,577
Real Estate Portfolio Segment [Member]
2015
Balance, beginning of period	12,542	18,716	22,254
Provision for loan losses	(3,099)	(4,922)	(2,432)
Recoveries	463	624	327
Loans charged off	(733)	(1,876)	(1,433)
Balance, end of period	9,173	12,542	18,716
Commercial Portfolio Segment [Member]
2015
Balance, beginning of period	1,153	1,409	1,513
Provision for loan losses	(449)	620	(2)
Recoveries	210	786	155
Loans charged off	(94)	(1,662)	(257)
Balance, end of period	820	1,153	1,409
Consumer Portfolio Segment [Member]
2015
Balance, beginning of period	273	452	678
Provision for loan losses	119	(62)	(166)
Recoveries	112	97	221
Loans charged off	(182)	(214)	(281)
Balance, end of period	$ 322	$ 273	$ 452