Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Gross	$ 161,631	$ 182,523
Less accumulated depreciation and amortization	(84,018)	(83,761)
Property and equipment, net	77,613	98,762
Land, buildings, and improvements
Property, Plant and Equipment [Line Items]
Gross	50,123	68,404
Equipment and purchased software
Property, Plant and Equipment [Line Items]
Gross	93,170	93,849
Furniture and leasehold improvements
Property, Plant and Equipment [Line Items]
Gross	$ 18,338	$ 20,270