Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 157,628	$ 159,217
Less: accumulated depreciation and amortization	(125,317)	(122,630)
Property and equipment, net	32,311	36,587
Corporate Aircraft and Related Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	48,645	48,645
Computer Equipment And Purchased Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	60,375	61,793
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,936	9,990
Leaseholds Improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	28,755	28,872
Internally Developed Software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 9,917	$ 9,917

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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