Other Financial Information - Noncash Operating Working Capital (Increase) Decrease) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net (increase) decrease in operating working capital, excluding cash and cash equivalents:
(Increase) decrease in accounts receivable	$ (137,228)	$ 8,056	$ 164,613
(Increase) decrease in inventories	(1,534)	12,809	5,953
(Increase) decrease in prepaid expenses	(3,413)	2,003	7,178
Increase (decrease) in accounts payable and accrued liabilities	69,854	95,166	(208,740)
Increase (decrease) in income taxes payable	6,593	423	(1,031)
Net (increase) decrease in noncash operating working capital	(65,728)	118,457	(32,027)
Supplementary disclosures:
Cash income taxes paid, net of refunds	24,853	2,138	(44,175)
Interest paid, net of amounts capitalized of $16.3 million in 2022, $16.1 million in 2021 and $8.0 million in 2020	149,957	165,699	191,561
Capitalized interest paid	16,300	16,100	8,000
Non-cash investing activities:
Asset retirement costs capitalized	(21,147)	54,439	14,736
(Increase) decrease in capital expenditure accrual	$ (31,397)	$ 9,788	$ 84,645