Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (968)	$ (10,686)
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	0	135
Net unrealized loss from unfunded defined benefit plan liability arising during the period, tax	(2,622)	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	$ (49)	$ (61)