Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax	$ 10,686	$ 5,338
Reclassification adjustment of net gain from sale of available for sale securities included in income, tax	135	262
Net unrealized loss from unfunded defined benefit plan liability arising during the period, tax	0	159
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax	$ (61)	$ (16)