Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Unrealized holding (loss) gain on available for sale securities arising during the period on securities held at end of period, tax	$ (2,146)	$ (992)	$ (4,715)
Reclassification adjustment for prior period unrealized (gain) loss previously reported in other comprehensive income recognized during current period, tax	1,399	60	(22)
Change in unfunded portion of postretirement benefit obligation, tax	$ 211	$ (74)	$ (382)