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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Apr. 11, 2018
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 85,856	$ 85,856
Intangible asset related to its customary advisory agreement	603,968	603,567
Accumulated Amortization	$ 101	$ 50
Software Development [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets useful lives	3 years
Accumulated Amortization	$ 51
Finite lived intangible assets remaining useful lives	2 years 10 months 24 days
Acquisition of ETFS Business [Member]
Indefinite-lived Intangible Assets [Line Items]
Goodwill			$ 84,057
Intangible asset related to its customary advisory agreement			$ 601,247
Series of Individually Immaterial Business Acquisitions [Member]
Indefinite-lived Intangible Assets [Line Items]
Acquisition completion date	Apr. 11, 2018

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