Consolidated Entities and Acquisitions - ISP Fund LP (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Mar. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	May 31, 2021
CONSOLIDATED ENTITIES
Total assets		$ 1,327,712		$ 1,327,712		$ 926,395
Changes in fair values of equity and long-term investments		130	$ 33,613	$ (67,881)	$ 133,973
ISP Fund LP
CONSOLIDATED ENTITIES
Distribution from partnership							$ 110,000
Economic interest of the Partnership (in percent)				100.00%
Total assets		289,800		$ 289,800		195,800
Total liabilities		200		200		$ 200
Investment-related expenses, net of investment-related income		300	200	1,000	1,500
Changes in fair values of equity and long-term investments		$ (10,500)	$ 10,100	$ (14,900)	$ 30,600
Capital contribution	$ 110,000
Lock-up period	36 months