Investments - Narrative (Details)		1 Months Ended		3 Months Ended	12 Months Ended
	Sep. 25, 2017 USD ($)	Sep. 30, 2022 shares	Jun. 30, 2022 shares	Mar. 31, 2020 USD ($)	Dec. 31, 2022 USD ($) investment shares	Dec. 31, 2021 USD ($) investment shares	Dec. 31, 2020 USD ($) investment	Apr. 12, 2022 USD ($)
Unusual or Infrequent Item, or Both [Line Items]
Debt conversion, converted instrument, shares issued | shares		500,000	2,300,000
Aggregate purchase price					$ 112,300,000
Common stock, shares outstanding (in shares) | shares					47,269,446	47,440,137
Equity securities, shares owned | shares					1,100,000	4,000,000
Investment in Consensus					$ 58,400,000	$ 229,200,000
Exchange of available-for-sale debt securities				$ 18,300,000	0	0	$ 18,326,000
Loss on investments, net				$ 4,400,000	46,743,000	16,677,000	20,991,000
Impairment loss on equity securities without readily determinable fair value						16,677,000	19,605,000
Proceeds from sale of equity securities without readily determinable fair value						14,300,000
Realized loss on securities						300,000
Equity securities, cumulative impairment loss						40,500,000	23,800,000
Fair Value					$ 15,586,000	$ 0	663,000
Number of investments in an unrealized loss position | investment					0	0
Other-than-temporary impairment losses recognized on debt securities					$ 0	$ 0	0
Variable interest entity, amount committed to invest	$ 200,000,000
Variable interest entity, ownership percentage	76.60%
Annual management fee percentage	2.00%
Entitled carried interest percentage	20.00%
Fund investment period	6 years
Equity method investment					112,285,000	122,593,000
Variable interest entity, amount of capital call notices received					0	22,200,000	32,900,000
Variable interest entity, amount paid						22,200,000	31,900,000
Distribution from equity method investment					0	15,327,000	0
(Loss) income from equity method investment, net of income taxes					(7,730,000)	35,845,000	(11,338,000)
Management fees recognized					1,500,000	$ 3,000,000.0	3,000,000.0
COVID-19
Unusual or Infrequent Item, or Both [Line Items]
(Loss) income from equity method investment, net of income taxes							$ (4,300,000)
Number of investments impaired | investment							2
Equity method investment, impairment							$ 7,000,000
Fund
Unusual or Infrequent Item, or Both [Line Items]
Equity method investment	$ 128,800,000
Investment in corporate debt securities
Unusual or Infrequent Item, or Both [Line Items]
Available for sale, debt securities, coupon rate								4.00%
Fair Value								$ 15,000,000.0
Secured Debt | Revolving Credit Facility
Unusual or Infrequent Item, or Both [Line Items]
Aggregate purchase price					$ 112,300,000
Public Stock Offering
Unusual or Infrequent Item, or Both [Line Items]
Debt conversion, converted instrument, shares issued | shares					2,800,000
Number of shares issued in transaction (in shares) | shares					73,919