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Compensation and Benefits - Change in Value of Investments (Details) - Long-Term Cash Awards - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Compensation and benefits
Schedule of Investments [Line Items]
Compensation and benefits	$ (1,490)	$ 83	$ (4,138)	$ 297
Other net investment gain (loss)
Schedule of Investments [Line Items]
Net investment gain (loss)	$ (3,987)	$ (356)	$ (19,192)	$ 2,117

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