CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) on investment securities, deferred income tax expense (benefit)	$ 5,226	$ 6,610
Reclassification adjustment for realized investment (gains) losses included in net income (loss), income tax (expense) benefit	(581)	(290)
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit cost (income), deferred income tax (expense) benefit	$ (147)	$ (136)