Components of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Plant And Equipment [Abstract]
Computer hardware	$ 148,541	$ 132,331
Computer software	288,532	269,917
Furniture and equipment	111,426	114,623
Leasehold improvements	118,868	122,060
Other	11,488	12,884
Property and equipment, cost	678,855	651,815
Accumulated depreciation	(566,211)	(544,135)
Property and equipment, net	$ 112,644	$ 107,680	$ 107,972