Goodwill and Identified Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Percentage of estimated fair value exceeding the carrying value	82.00%
Amortization expense for identified intangibles	$ 27,329	$ 29,204	$ 30,420
Cost of revenue [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense for identified intangibles	$ 19,200	$ 20,500	$ 21,500