Goodwill and Other Intangible Assets - Summary of Amortized Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 7,642	$ 5,095	$ 15,111	$ 10,204
Services cost of revenues
Finite-Lived Intangible Assets [Line Items]
Amortization expense	1,881	1,927	3,766	3,867
Amortization of intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 5,761	$ 3,168	$ 11,345	$ 6,337