Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense of intangible assets	$ 36,482,000	$ 19,239,000
Impact of foreign exchange rates on intangible assets	$ 13,900,000