Property, Equipment and Software, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense			$ 44,034	$ 39,927
Property, Equipment and Software
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 12,800	$ 12,300	38,800	33,800
Internally Developed Software
Property, Plant and Equipment [Line Items]
Impairment expense	$ 200	$ 2,400	$ 2,500	$ 3,200