Goodwill and Other Intangible Assets Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 422,981		$ 421,563
Total other intangible assets, net	363,593		$ 371,416
Amortization expense of intangible assets	6,210	$ 3,407
Estimated Future Amortization Expense by Fiscal Year [Abstract]
Remainder of 2016	20,300
2017	25,500
2018	24,100
2019	19,400
2020	17,100
2021	16,100
After 2021	$ 11,800