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Other Financial Information | 3 Months Ended
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Mar. 31, 2025
Other Financial Information [Abstract] |
Other Financial Information | Note F – Other Financial Information Supplemental Information to Statement of Cash Flows
| Three Months Ended March 31,
(Thousands of dollars) | 2025 |  | 2024
Net (increase) decrease in operating working capital, excluding cash and cash equivalents: |  |  |
(Increase) decrease in accounts receivable | $ | (10,089) |  |  | $ | (13,174) |
(Increase) decrease in inventories | (15,851) |  |  | 4,860 |
(Increase) decrease in prepaid expenses | 10,502 |  |  | 5,110 |
Increase (decrease) in accounts payable and accrued liabilities | (13,560) |  |  | (24,852) |
Increase (decrease) in income taxes payable | 6,214 |  |  | 3,703 |
Net (increase) in non-cash working capital | $ | (22,784) |  |  | $ | (24,353) |
Supplementary disclosures: |  |  |
Net cash income taxes (refunded) paid | $ | (1,632) |  |  | $ | 405 |
Interest paid, net of amounts capitalized of $1.1 million in 2025 and $3.9 million in 2024 | 6,347 |  |  | 11,062 |
Non-cash investing activities: |  |  |
Asset retirement costs capitalized | $ | 8,996 |  |  | $ | 10,955 |
(Increase) decrease in capital expenditure accrual | (42,442) |  |  | (12,948) |

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- Definition The entire disclosures of supplemental information, including descriptions and amounts, related to the balance sheet, income statement, and/or cash flow statement. + References No definition available. + Details
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