Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ (7,025)	$ (3,455)	$ 10,200
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	429	574	200
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	22	2,878	0
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	$ (243)	$ (122)	$ (54)