Other Long-Term Investments - Carrying Value of Equity Method Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	$ 81,982	$ 86,789
Arena SOP LP units
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	6,683	8,734
Arena Special Opportunities Fund, LP units
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	42,701	44,504
Brewer Lane Ventures Fund II LP units
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	390	200
Dowling Capital Partners LP units
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	2,231	1,965
Hudson Ventures Fund 2 LP units
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	3,391	3,551
JVM Funds LLC
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	21,698	22,473
RISCOM
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	4,118	4,037
Universa Black Swan LP units
Schedule of Equity Method Investments [Line Items]
Recorded investment balance	$ 770	$ 1,325