Note 7 - Loans (Details) - Troubled Debt Restructuring Activity - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 7 - Loans (Details) - Troubled Debt Restructuring Activity [Line Items]
Charge-offs			$ (148)
Accruing Troubled Debt Restructuring [Member]
Note 7 - Loans (Details) - Troubled Debt Restructuring Activity [Line Items]
Beginning balance	$ 100,393	$ 118,922	104,356	$ 117,597
New restructurings	5,798	722	16,426	8,097
Restructured loans restored to accrual status				962
Charge-offs			(148)
Payments	(6,180)	(1,278)	(10,434)	(8,290)
Restructured loans placed on nonaccrual		(7,230)	(10,189)	(7,230)
Ending balance	100,011	111,136	100,011	111,136
Non Accruing Troubled Debt Restructuring [Member]
Note 7 - Loans (Details) - Troubled Debt Restructuring Activity [Line Items]
Beginning balance	44,541	37,797	41,618	38,769
New restructurings		247	209	1,786
Restructured loans restored to accrual status				(962)
Charge-offs	(489)	(595)	(3,243)	(599)
Payments	(1,457)	(1,074)	(6,178)	(2,619)
Restructured loans placed on nonaccrual		7,230	10,189	7,230
Ending balance	$ 42,595	$ 43,605	$ 42,595	$ 43,605