Segment Information (Reconciliation of EBITDA to Net Income) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Information [Abstract]
Net income (loss)	$ 291,995	$ 269,898	$ (55,085)	$ (40,972)	$ 561,893	$ (96,057)
Depreciation, depletion and amortization	51,384		41,212		89,393	94,293
Interest expense (net of income)	17,482		16,596		34,814	31,731
Other foreign exchange (gains) losses	(25,138)		140		(23,147)	1,889
Loss on debt extinguishment	0		5,744		0	5,744
Income tax expense (benefit)	102,025		8,184		183,968	(10,884)
Restructuring costs	0		2,300		0	2,300
Losses on idled assets held for sale	456		836		1,842	2,330
Increase (decrease) in provision for discounting and credit losses	156		(1,866)		584	(5,644)
Consolidated Adjusted EBITDA	$ 438,360		$ 18,061		$ 849,347	$ 25,702