CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 292,677	$ (4,481)	$ 175,616	$ (121,653)
Pension and post-retirement obligations:
Amortization of actuarial loss (gain) and prior service cost (credit) to earnings, net of tax	(52)	524	(156)	848
Derivative instruments designated as cash flow hedges:
Change in fair value of derivatives, net of tax	2,693	(219)	10,214	90
Reclassification of realized loss to earnings, net of tax	211	2,071	2,874	8,933
Comprehensive income (loss)	295,529	(2,105)	188,548	(111,782)
Less: comprehensive income attributable to noncontrolling interest	75	240	393	523
Total comprehensive income (loss) attributable to common shareholders	$ 295,454	$ (2,345)	$ 188,155	$ (112,305)