CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 15,026	$ 18,143	$ 31,821	$ 37,883
Other comprehensive (loss) income:
Net change in unrealized gains on available-for-sale securities, net of tax	(42,053)	2,296	(114,864)	(15,213)
Net decrease in fair value, tax (expense) benefit	2,819	(2,364)	5,764	2,800
Net gain on postretirement plans, net of tax	181	171	363	341
Other comprehensive (loss) income	(39,053)	103	(108,737)	(12,072)
Comprehensive (Loss) Income	$ (24,027)	$ 18,246	$ (76,916)	$ 25,811