Note 17 - Components of Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Details) (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unrealized holding gain (loss) on available for sale securities, tax	$ (431)	$ (571)	$ 6,693
Reclassification adjustment for gain included in net income, taxes	(65)	(12)	(1)
Net pension gain (losses) arising during the period, taxes	132	(597)	(574)
Less amortization of prior service cost included in net periodic pension cost, tax	$ (38)	$ (38)	$ (39)