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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Apr. 11, 2018
Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Goodwill | $ 86,841 | $ 86,841 | $ 85,856 |
Intangible asset related to its customary advisory agreement | $ 604,407 | $ 604,407 | $ 603,567 |
Software Development [Member] |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Finite-Lived Intangible Asset, Useful Life | 3 years | 3 years |  |
Amortization of goodwill and intangible assets | $ 106 | $ 156 |  |
Finite lived intangible assets remaining useful lives | 2 years 10 months 24 days | 2 years 10 months 24 days |  |
Acquisition of ETFS Business [Member] |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |
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 |  |
Securrency [Member] |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |
Goodwill | $ 86,841 | $ 86,841 |  |
Goodwill not deductible for tax purposes | $ 85,042 | $ 85,042 |  |

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