CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) on investment securities, deferred income tax expense (benefit)	$ 4,851	$ (2,014)	$ 10,319	$ (7,056)
Reclassification adjustment for net realized investment (gains) losses included in net income (loss), income tax (expense) benefit	(10)	1,153	47	1,204
Reclassification adjustment for amounts amortized into net periodic pension and postretirement benefit cost (income), deferred income tax (expense) benefit	$ (86)	$ (143)	$ (170)	$ (287)