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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 379,480	$ 381,752	$ 379,421	$ 383,861
Amortization of intangible assets related to acquisitions	15	$ 15
Financial Advisory Segment [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	314,939		314,880
Asset Management Segment [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 64,541		$ 64,541