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 (loss)	$ 364,189	$ (81,297)	$ (409,086)
Other comprehensive income (loss):
Other post-retirement benefits income (loss), net of tax	5,627	6,244	(4,324)
Total other comprehensive income (loss), net of tax	5,627	6,244	(4,324)
Comprehensive income (loss)	$ 369,816	$ (75,053)	$ (413,410)