Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill deductible for income tax purposes	$ 362,600	$ 351,000
Impact of foreign exchange rates on intangible assets	36,800
Amortization expense of intangible assets	$ 161,635	$ 159,740	$ 86,149