Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill deductible for income tax purposes	$ 351,000	$ 387,900
Amortization expense of intangible assets	159,740	$ 86,149	$ 49,313
Impact of foreign exchange rates on intangible assets	$ 82,000