Goodwill and Other Intangible Assets Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 161,433		$ 161,433	$ 131,014
Total other intangible assets, net	112,463		112,463	$ 105,103
Amortization expense of intangible assets	3,774	$ 2,913	7,181
Estimated Future Amortization Expense by Fiscal Year [Abstract]
Remainder of 2015	7,600		7,600
2016	14,800		14,800
2017	12,800		12,800
2018	11,000		11,000
2019	5,600		5,600
2020	3,700		3,700
After 2020	$ 2,600		$ 2,600