Note 8 - Loans (Details) - Troubled Debt Restructuring Activity - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Note 8 - Loans (Details) - Troubled Debt Restructuring Activity [Line Items]
Charge-offs			$ (148)
Accruing Troubled Debt Restructuring [Member]
Note 8 - Loans (Details) - Troubled Debt Restructuring Activity [Line Items]
Beginning balance	$ 100,011	$ 111,136	104,356	$ 117,597
New restructurings	427	14,900	16,853	22,997
Restructured loans restored to accrual status	723	660	723	1,622
Charge-offs			(148)
Payments	(11,280)	(3,607)	(21,714)	(11,897)
Restructured loans placed on nonaccrual			(10,188)	(7,230)
Ending balance	89,881	123,089	89,881	123,089
Non Accruing Troubled Debt Restructuring [Member]
Note 8 - Loans (Details) - Troubled Debt Restructuring Activity [Line Items]
Beginning balance	42,595	43,605	41,618	38,769
New restructurings	1,796	34	2,006	1,820
Restructured loans restored to accrual status	(723)	(660)	(723)	(1,622)
Charge-offs	(3)	(234)	(3,246)	(833)
Payments	(1,859)	(8,583)	(8,037)	(11,202)
Restructured loans placed on nonaccrual			10,188	7,230
Ending balance	$ 41,806	$ 34,162	$ 41,806	$ 34,162