Other Financial Information (Tables)

6 Months Ended

Jun. 30, 2026

Other Financial Information [Abstract]

Schedule of Noncash Operating Working Capital (Increase) Decrease

Supplemental Information to Statement of Cash Flows


			Six Months Ended June 30,
(Thousands of dollars)			2026						2025
Net (increase) decrease in operating working capital, excluding cash and cash equivalents:
(Increase) decrease in accounts receivable			$	(96,506)					$	(976)
(Increase) decrease in inventories			(6,464)						(9,040)
(Increase) decrease in prepaid expenses			(3,897)						(11,009)
Increase (decrease) in accounts payable and accrued liabilities			52,269						24,141
Increase (decrease) in income taxes payable			14,121						4,789
Net (increase) decrease in non-cash working capital			$	(40,477)					$	7,905

Supplementary disclosures:

Interest paid, net of amounts capitalized of $8.8 million in 2026 and $2.9 million in 2025			$	35,442					$	44,577

Non-cash investing activities:
Asset retirement costs capitalized			$	8,918					$	9,427
(Increase) decrease in capital expenditure accrual			(52,007)						22,748