Fixed Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Property, Plant and Equipment
Depreciation expense	$ 5,300,000	$ 4,400,000	$ 13,600,000	$ 13,700,000
Impairment charges		0		0
Software development costs capitalized	500,000	600,000	2,600,000	2,900,000
Amortization of software development costs	300,000	$ 600,000	900,000	$ 1,800,000
Software, including software development costs
Property, Plant and Equipment
Impairment charges	$ 1,100,000		$ 1,400,000