Condensed Consolidated Statements of Comprehensive Income - 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
Net income	$ 181,007	$ 89,143	$ 860,443	$ 110,967
Derivative instruments
Comprehensive income before tax		299	1,763	1,626
Other comprehensive income, derivative instruments, net of tax		299	1,763	1,626
Pension, postretirement and other post-employment benefits
Comprehensive income (loss) before tax	(1,473)	2,189	(10,896)	6,698
Other comprehensive income (loss), pension, postretirement and other post-employment benefits, net of tax	(1,473)	2,189	(10,896)	6,698
Available-for-sale securities
Comprehensive income (loss) before tax	(4)	135	178	220
Other comprehensive income, available-for-sale securities, net of tax	(4)	135	178	220
Total other comprehensive income (loss)	(1,477)	2,623	(8,955)	8,544
Total comprehensive income	$ 179,530	$ 91,766	$ 851,488	$ 119,511