Note 23 - Fair Values - Losses Resulting from Non-recurring Fair Value Adjustments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Losses resulting from nonrecurring fair value adjustments	$ 1,260	$ 673	$ 2,258
Collateral Dependent Impaired Loans [Member]
Losses resulting from nonrecurring fair value adjustments	1,183	476	2,216
Other Real Estate Owned [Member]
Losses resulting from nonrecurring fair value adjustments	$ 77	$ 197	$ 42