Annual report pursuant to Section 13 and 15(d)

Property, Equipment and Software - Additional Information (Detail)

v3.6.0.2
Property, Equipment and Software - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense for property, equipment and software $ 24,500,000 $ 20,600,000 $ 18,900,000
Carrying amount of capitalized development costs 55,400,000 41,200,000  
Accumulated amortization 19,800,000 14,000,000  
Capitalization of software development costs 13,700,000 10,500,000 10,900,000
Impairment loss 750,000 20,801,000  
Loss on disposal of software in development (497,000) (3,070,000) (386,000)
Impairment of Leasehold 0    
Disposal of fixed assets 600,000 1,300,000  
Loss on disposal of fixed assets (600,000) (200,000)  
Software      
Property, Plant and Equipment [Line Items]      
Depreciation and amortization expense for property, equipment and software $ 5,800,000 3,300,000 1,700,000
Weighted-average useful life (in years) 4 years 8 months 12 days    
Leasehold Improvements      
Property, Plant and Equipment [Line Items]      
Weighted-average useful life (in years) 12 years    
Product Development | Software      
Property, Plant and Equipment [Line Items]      
Impairment loss     $ 0
Loss on disposal of software in development   1,400,000  
General and Administrative | Leasehold Improvements      
Property, Plant and Equipment [Line Items]      
Tangible asset impairment charges   $ 1,500,000