Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income (Loss)	$ 230,377	$ (4,450)
Other Comprehensive (Loss) Income:
Actuarially Determined Long-Term Liability Adjustments (Net of tax: $274, $(508))	901	(1,525)
Unrealized Gain on Investments in Available-for-Sale Securities (Net of tax: $(64), $—)	212	0
Unrealized Gain on Cash Flow Hedges (Net of tax: $—, $(130))	0	391
Other Comprehensive (Loss) Income	(689)	1,916
Comprehensive Income (Loss)	$ 229,688	$ (2,534)