CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 65,816	$ 37,057	$ 173,879	$ 401
Other comprehensive income (loss)
Net changes in pension and other postretirement plan assets and benefit obligations recognized in other comprehensive income (loss), net of tax provision (benefit) of zero and $2 for the three months ended June 30, 2023 and 2022, respectively, and $2,436 and $2 for the six months ended June 30, 2023 and 2022, respectively.	41	(1,163)	(2,145)	(1,587)
Other comprehensive income (loss), net	41	(1,163)	(2,145)	(1,587)
Comprehensive income (loss)	$ 65,857	$ 35,894	$ 171,734	$ (1,186)