Leases - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
Feb. 28, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating lease, impairment loss			$ 9,277
Payment of lease termination fee		$ 12,725
Impairment		0	16,156	$ 22,752
Lease Termination [Member] \| London Office [Member]
Impairment	$ 303	$ 0	$ 303

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2420-110228

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration