XML 111 R98.htm IDEA: XBRL DOCUMENT v3.21.2
Fixed Assets, Net - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Property, Plant and Equipment        
Depreciation expense $ 5,800,000 $ 3,400,000 $ 10,100,000 $ 8,300,000
Impairment charges 0 0 0 0
Software, including software development costs        
Property, Plant and Equipment        
Software development costs capitalized 0.0 800,000 600,000 2,100,000
Amortization of software development costs $ 300,000 $ 200,000 $ 600,000 $ 600,000