CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 218,363	$ 7,217	$ (212,192)
Other comprehensive income:
Pension adjustment and reclassification adjustment, net of taxes	764	(2,890)	5,727
Foreign currency translation	5	(112)	(210)
Comprehensive income (loss)	$ 219,132	$ 4,215	$ (206,675)