Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Amortization of prior service credits, tax	$ 18	$ 20	$ 20
Amortization of net actuarial losses, tax	(238)	(509)	(330)
Unrecognized actuarial gains (losses), tax	(367)	(465)	2,880
Change in net unrealized (losses) gains on securities available for sale, tax	1,737	2,911	(10,441)
Reclassification adjustment for net gains included in net income, tax	$ 638	$ 72	$ 1,241