Business Segment Information (Reconciliation of Segment Margin to Net Income) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Segment Reporting [Abstract]
Income (loss) from continuing operations before income taxes	$ 14,687,000	$ 23,029,000	$ 90,756,000	$ (3,032,000)
Net income attributable to noncontrolling interests	(11,999,000)	(13,569,000)	(38,090,000)	(32,755,000)
Corporate general and administrative expenses	19,172,000	15,992,000	56,333,000	72,736,000
Depreciation, amortization and accretion	63,069,000	59,746,000	189,554,000	177,768,000
Interest expense, net	67,275,000	66,407,000	202,207,000	197,199,000
Adjustment to include distributable cash generated by equity investees not included in income and exclude equity in investees net income	6,662,000	5,233,000	14,651,000	16,920,000
Unrealized losses (gains) on derivative transactions excluding fair value hedges, net of changes in inventory value	(747,000)	136,000	(702,000)	(68,000)
Other non-cash items	(3,128,000)	(3,307,000)	(11,515,000)	(10,258,000)
Loss on extinguishment of debt	0	0	3,570,000	9,779,000
Differences in timing of cash receipts for certain contractual arrangements	(7,785,000)	(7,091,000)	(16,200,000)	(24,449,000)
Gain on sale of assets	0	0	(17,436,000)	0
Total Segment Margin	$ 147,206,000	$ 146,576,000	$ 473,128,000	$ 403,840,000