Other Financial Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Net (increase) decrease in operating working capital, excluding cash and cash equivalents:
(Increase) in accounts receivable	$ (69,689)	$ (130,792)
(Increase) decrease in inventories	(6,609)	(410)
(Increase) in prepaid expenses	(3,364)	(8,561)
Increase (decrease) in accounts payable and accrued liabilities	(60,582)	61,139
Increase (decrease) in income taxes payable	(2,544)	18,750
Net increase in noncash working capital	(142,788)	(59,874)
Supplementary disclosures:
Cash income taxes paid, net of refunds	12,737	16,493
Interest paid, net of amounts capitalized of $10.4 million in 2023 and $13.2 million in 2022	78,169	112,332
Non-cash investing activities:
Asset retirement costs capitalized	16,219	29,327
Decrease in capital expenditure accrual	75,760	34,853
Interest paid, amount capitalized	$ 10,400	$ 13,200