Intangible Assets - Additional Information (Detail) $ in Millions	Dec. 31, 2016 USD ($)
Finite Lived Intangible Assets Future Amortization Expense [Abstract]
Estimated future amortization expense, 2017	$ 14.0
Estimated future amortization expense, 2018	12.8
Estimated future amortization expense, 2019	12.2
Estimated future amortization expense, 2020	12.2
Estimated future amortization expense, 2021	12.2
Estimated future amortization expense, thereafter	$ 54.3