Goodwill and Other Intangible Assets Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 161,911		$ 131,014
Total other intangible assets, net	116,572		$ 105,103
Amortization expense of intangible assets	3,407	$ 2,752
Estimated Future Amortization Expense by Fiscal Year [Abstract]
Remainder of 2015	11,300
2016	14,800
2017	12,700
2018	11,000
2019	6,100
2020	3,800
After 2020	$ 2,800