Note 15 - Fair Values (Details) - Losses Resulting from Nonrecurring Fair Value Adjustments - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Note 15 - Fair Values (Details) - Losses Resulting from Nonrecurring Fair Value Adjustments [Line Items]
Losses resulting from nonrecurring fair value adjustments	$ 199	$ 852	$ 5,278
Impaired Loans [Member]
Note 15 - Fair Values (Details) - Losses Resulting from Nonrecurring Fair Value Adjustments [Line Items]
Losses resulting from nonrecurring fair value adjustments	$ 199	744	4,988
Other Real Estate Owned [Member]
Note 15 - Fair Values (Details) - Losses Resulting from Nonrecurring Fair Value Adjustments [Line Items]
Losses resulting from nonrecurring fair value adjustments		$ 108	$ 290