Other Financial Information (Noncash Operating Working Capital (Increase) Decrease) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Net decrease (increase) in operating working capital, excluding cash and cash equivalents:
(Increase) in accounts receivable	$ (263,104)	$ (104,775)
(Increase) decrease in inventories	(10,092)	8,938
(Increase) in prepaid expenses	(1,693)	(1,945)
Increase in accounts payable and accrued liabilities	147,790	124,699
Increase (decrease) in income taxes payable	5,501	(352)
Net decrease (increase) in noncash operating working capital	(121,598)	26,565
Supplementary disclosures:
Cash income taxes paid, net of refunds	1,783	1,474
Interest paid, net of amounts capitalized of $10.4 million in 2022 and $7.4 million in 2021	78,747	80,546
Capitalized interest paid	10,400	7,400
Non-cash investing activities:
Asset retirement costs capitalized	9,007	6,669
(Increase) decrease in capital expenditure accrual	$ (1,929)	$ 20,614
Impairment of asset retirement obligation			$ 74,400