Consolidated Entities (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
	Mar. 30, 2022	Dec. 31, 2020	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	May 31, 2021
CONSOLIDATED ENTITIES
Initial contribution		$ 190,000
Total assets			$ 1,224,917		$ 1,224,917		$ 1,243,507
Net investment-related income (expense) earned (incurred)			100		$ 300
ISP Fund LP
CONSOLIDATED ENTITIES
Distribution from partnership								$ 110,000
Economic interest of the Partnership (in percent)					100.00%
Total assets			270,000		$ 270,000		311,800
Total liabilities			600		600		$ 100
Changes in fair values of equity and long-term investments expense, net			$ 15,800		$ 42,000	$ 300
Changes in fair values of equity and long-term investments income, net				$ 3,800
Net investment-related income (expense) earned (incurred)				$ 600		$ 100
Capital contribution	$ 110,000	$ 300,000
Lock-up period	36 months