Segment Information - Summarized Financial Information by Reportable Segments (Footnote) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Mark-to-market (loss) gain on public equity securities	$ (17,800)	$ 15,000	$ (27,200)	$ 60,800
(Loss) gain in fair value of public equity securities	(17,780)	15,020	(60,939)	60,846
Liability releases			(2,570)
Selling, general and administrative expenses
Segment Reporting Information [Line Items]
Legal costs	5,100		5,200
Liability releases				1,900
Other restructuring costs		700		1,400
Multiemployer plan, period contributions		600		600
Other income, net
Segment Reporting Information [Line Items]
Mark-to-market (loss) gain on public equity securities	(17,800)	15,000	(27,200)	60,800
(Loss) gain in fair value of public equity securities			(33,700)
Preferred equity gain	8,900	2,700	17,600	2,700
Liability releases	$ 600		600
Revision of tax indemnification expense (gain) loss		$ (3,900)	2,400	(3,900)
Gain (loss) on sale of assets			17,300
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%