Supplemental Cash Flow Information (Net Changes in Components of Operating Assets and Liabilities) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Supplemental Cash Flow Elements [Abstract]
Accounts receivable	$ (445,994,000)	$ (91,266,000)
Inventories	33,342,000	(16,890,000)
Deferred charges	59,826,000	(26,663,000)
Other current assets	(1,599,000)	76,000
Accounts payable	425,440,000	55,712,000
Accrued liabilities	(12,396,000)	(11,348,000)
Net changes in components of operating assets and liabilities	$ 58,619,000	$ (90,379,000)