Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 284,184	$ 176,769	$ 95,851
Other Comprehensive Income (Loss):
Unrealized (Loss) Gain on Available-for-Sale Securities, net of tax benefit (expense) of $115, $52 and $(42)	(432)	(196)	155
Pension and Other Postretirement Benefit Plan, net of tax (expense) benefit of ($2,769), $(766) and $796	7,871	2,179	(2,225)
Total Other Comprehensive Income (Loss)	7,439	1,983	(2,070)
Total Comprehensive Income	$ 291,623	$ 178,752	$ 93,781