Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 81,825	$ 84,137	$ 62,210
Unrealized Gains (Losses) on Securities:
Unrealized Holding Gain (Loss) Arising During the Period	(353,013)	(23,011)	29,783
Reclassification Adjustment for Gains Included in Net Income	(563)	(2,247)	(4,081)
Tax Effect	74,600	5,367	(5,432)
Net of Tax	(278,976)	(19,891)	20,270
Postretirement Benefit Obligation:
Net (Loss) Arising During the Period	0	0	0
Reclassification Adjustment for Amortization of Prior Service Cost and Net	54	0	0
Tax Effect	0	0	0
Net of Tax	54	0	0
Total Other Comprehensive Income (Loss)	(278,922)	(19,891)	20,270
COMPREHENSIVE INCOME	$ (197,097)	$ 64,246	$ 82,480