Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$ 120,055	$ 55,737
Impact of foreign exchange rates on intangible assets	$ 52,200