Goodwill and Intangible Assets - Schedule of Goodwill (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Beginning balance	$ 1,564,904
Foreign exchange translation adjustment	549
Goodwill, Ending balance	$ 1,565,453