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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 377,884	$ 379,421	$ 380,687	$ 383,861
Financial Advisory Segment [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	313,343	314,880
Asset Management Segment [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 64,541	$ 64,541

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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