Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$ 55,737,000	$ 31,535,000
Impact of foreign exchange rates on intangible assets	$ 10,600,000