Fixed Assets, Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 22,700,000	$ 13,700,000	$ 12,200,000
Impairment charges	5,000,000.0	0	0
Software development costs capitalized	5,900,000	2,400,000	1,100,000
Amortization of software development costs	$ 2,000,000.0	$ 900,000	$ 400,000