CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 16,795	$ 19,740
Other comprehensive loss:
Net change in unrealized gains on available-for-sale securities, net of tax	(72,811)	(17,509)
Net decrease in fair value, tax (expense) benefit	2,945	5,164
Net gain on postretirement plans, net of tax	182	170
Other comprehensive loss	(69,684)	(12,175)
Comprehensive (Loss) Income	$ (52,889)	$ 7,565