PROPERTY AND EQUIPMENT, NET - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 371,316	$ 417,296
Less: accumulated depreciation		264,028	300,105
Property and equipment, net	[1]	107,288	117,191
Capitalized software costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross		174,931	209,007
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		15,992	15,464
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross		36,286	40,103
Computer and communications equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 144,107	$ 152,722

[1] Total long-lived assets include property and equipment, net.