Property, Plant and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 607,451	$ 556,518
Less: Accumulated depreciation and amortization	(407,336)	(381,122)
Property, plant and equipment, net	200,115	175,396
Land
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	9,635	9,873
Buildings
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	44,487	47,718
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	37,421	33,356
Computer Equipment and Servers
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	187,119	172,086
Plant, Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	84,677	79,599
Computer Software
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	119,648	110,153
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	92,313	86,997
Vehicles
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	6,753	6,009
Capital Work in Progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 25,398	$ 10,727