Estimated Future Amortization Expense for Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
2017	$ 47,937
2018	34,643
2019	21,332
2020	20,325
2021	16,199
Thereafter	31,826
Total intangible assets subject to amortization, net	172,262
Indefinite-lived trade name	357
Other intangible assets, net	$ 172,619	$ 220,553