Other Financial Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Net (increase) decrease in operating working capital, excluding cash and cash equivalents:
(Increase) decrease in accounts receivable	$ 80,603	$ (69,689)
(Increase) decrease in inventories	1,823	(6,609)
(Increase) decrease in prepaid expenses	(8,131)	(3,364)
Increase (decrease) in accounts payable and accrued liabilities	(43,231)	(60,582)
Increase (decrease) in income taxes payable	771	(2,544)
Net decrease (increase) in noncash working capital	31,835	(142,788)
Supplementary disclosures:
Cash income taxes paid, net of refunds	12,519	12,737
Interest paid, net of amounts capitalized of $10.8 million in 2024 and $10.4 million in 2023	48,708	78,169
Non-cash investing activities:
Asset retirement costs capitalized	19,949	16,219
(Increase) decrease in capital expenditure accrual	(2,177)	75,760
Interest paid, amount capitalized	$ 10,800	$ 10,400