Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 271,872	$ (6,042)
Derivative instruments
Comprehensive income before tax	1,763	689
Other comprehensive income, derivative instruments, net of tax	1,763	689
Pension, postretirement and other post-employment benefits
Comprehensive income (loss) before tax	(522)	547
Other comprehensive income (loss), pension, postretirement and other post-employment benefits, net of tax	(522)	547
Available-for-sale securities
Comprehensive income before tax	182	101
Other comprehensive income, available-for-sale securities, net of tax	182	101
Total other comprehensive income	1,423	1,337
Total comprehensive income (loss)	$ 273,295	$ (4,705)