Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 9,089	$ 6,299	$ 25,282	$ 21,377
Capitalized developed software costs	4,100	2,000	10,800	5,500
Accelerated depreciation and amortization expense				1,900
Property And Equipment Excluding Developed Software
Property Plant And Equipment [Line Items]
Depreciation and amortization	2,300	1,100	5,600	4,500
Developed software
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 1,400	$ 500	$ 3,600	$ 3,400