Goodwill and Intangible Assets - Estimated Annual Amortization Expense for Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
2016 (remaining)	$ 3,100
2017	10,760
2018	10,507
2019	10,471
2020	10,196
2021	9,723
Thereafter	30,887
Finite lived intangible assets, Net	$ 85,644	$ 93,172