Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail)

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Property and Equipment, Net - Schedule of Property and Equipment, Net (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Less: accumulated depreciation and amortization $ (26,290) $ (25,104)
Property and equipment, net 21,609 19,550
Computer software and hardware equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment 24,489 20,427
Furniture, fixtures, and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment $ 23,410 $ 24,227