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	$ 131,014	$ 123,031	$ 126,697
Total other intangible assets, net	105,103	100,935
Amortization expense of intangible assets	12,136	$ 11,599
Estimated Future Amortization Expense by Fiscal Year [Abstract]
2015	13,000
2016	13,000
2017	10,800
2018	9,200
2019	4,400
After 2019	$ 2,800