Goodwill and Other Intangible Assets - Estimated Other Intangible Assets Amortization Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense for other intangible assets total	$ 40,870	$ 34,878	$ 36,867
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2017	42,848
2018	42,614
2019	42,110
2020	41,462
2021	41,167
Estimated other intangible assets amortization expense	$ 210,201