Segment Information (Reconciliation of EBITDA to Net Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Information [Abstract]
Net income (loss)	$ 269,898	$ (40,972)
Depreciation, depletion and amortization	38,009	53,081
Interest expense (net of income)	17,332	15,135
Other foreign exchange losses	1,991	1,749
Income tax expense (benefit)	81,943	(19,068)
Losses on idled assets held for sale	1,386	(1,494)
Increase (decrease) in provision for discounting and credit losses	428	(3,778)
Consolidated Adjusted EBITDA	$ 410,987	$ 7,641