Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 284,444	$ 244,524
Accumulated depreciation and amortization	(112,583)	(89,347)
Property and equipment, net	171,861	155,177
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,653	9,958
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 137,448	122,241
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	$ 99,435	84,649
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	$ 28,506	27,238
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	$ 402	$ 438
Transportation equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, Useful lives	5 years