Segment Information - Summarized Financial Information by Reportable Segments (Footnote) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Mark-to-market (loss) gain on public equity securities	$ (5,000)	$ (26,400)	$ (32,200)	$ 34,400
(Loss) gain in fair value of public equity securities	(4,983)	(26,445)	(65,922)	34,401
Liability releases			(2,570)
Selling, general and administrative expenses
Segment Reporting Information [Line Items]
Legal costs	100		5,300
Other restructuring costs		700		2,100
Gain (loss) on sale of properties		(300)
Liability releases				1,900
Multiemployer plan, period contributions				1,000
Other income, net
Segment Reporting Information [Line Items]
Mark-to-market (loss) gain on public equity securities	(5,000)	(26,400)	(32,200)	34,400
(Loss) gain in fair value of public equity securities			(33,700)
Preferred equity gain	9,200	8,200	26,800	10,900
Revision of tax indemnification expense (gain) loss	$ 2,000		(400)	3,900
Insurance Proceeds		$ 7,200		7,200
Gain (loss) on sale of assets			17,300
Liability releases			600
Charges for asset retirement obligations			2,900	$ 3,600
Cost of goods sold
Segment Reporting Information [Line Items]
Non-routine labor costs			$ 1,400
Windfield Holdings
Segment Reporting Information [Line Items]
Equity method investment, ownership percentage	49.00%		49.00%