Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 180,853	$ 144,324
Accumulated depreciation and amortization	(56,585)	(43,212)
Property and equipment, net	124,268	101,112
Land
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	9,958	8,146
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 94,924	77,020
Building and leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives	5 years
Building and leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives	39 years
Computer equipment and purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 55,627	42,245
Computer equipment and purchased software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives	3 years
Computer equipment and purchased software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 19,897	16,661
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives	5 years
Transportation equipment
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 447	$ 252
Transportation equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives	5 years