v3.25.2
Other Financial Information (Tables)
 6 Months Ended
Jun. 30, 2025
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)20252024
Net (increase) decrease in operating working capital, excluding cash and cash equivalents:
(Increase) decrease in accounts receivable $(976)$7,355 
(Increase) decrease in inventories(9,040)2,170 
(Increase) decrease in prepaid expenses(11,009)2,296 
Increase (decrease) in accounts payable and accrued liabilities24,141 (9,689)
Increase (decrease) in income taxes payable4,789 (1,006)
Net decrease in non-cash working capital$7,905 $1,126 
Supplementary disclosures:
Net cash income taxes (refunded) paid$423 $3,236 
Interest paid, net of amounts capitalized of $2.9 million in 2025 and $7.8 million in 2024
44,577 38,262 
Non-cash investing activities:
Asset retirement costs capitalized$9,427 $16,175 
(Increase) decrease in capital expenditure accrual22,748 (24,780)