Property and Equipment, Net (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 434,556	$ 448,690
Less: accumulated depreciation	308,211	324,521
Property and equipment, net	126,345	124,169
Capitalized software costs
Property, Plant and Equipment [Line Items]
Property and equipment, gross	213,592	200,567
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	18,408	22,785
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	38,608	41,573
Computer and communications equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 163,948	$ 183,765