Other Financial Information (Tables)

9 Months Ended

Sep. 30, 2026

Other Financial Information [Abstract]

Schedule of Noncash Operating Working Capital (Increase) Decrease

Supplemental Information to Statement of Cash Flows


			Nine Months Ended September 30,
(Thousands of dollars)			2026						2025
Net (increase) decrease in operating working capital, excluding cash and cash equivalents:
(Increase) decrease in accounts receivable			$	(87,904)					$	(7,567)
(Increase) decrease in inventories			(4,648)						(9,532)
(Increase) decrease in prepaid expenses			(7,666)						15
Increase (decrease) in accounts payable and accrued liabilities			82,730						(5,373)
Increase (decrease) in income taxes payable			2,467						1,984
Net (increase) decrease in non-cash working capital			$	(15,021)					$	(20,473)

Supplementary disclosures:
Interest paid, net of amounts capitalized of $15.7 million in 2026 and $5.3 million in 2025			$	50,612					$	52,426

Non-cash investing activities:
Asset retirement costs capitalized			$	40,491					$	21,756
(Increase) decrease in capital expenditure accrual			(1,920)						(34,210)