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Goodwill and Other Intangible Assets - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2017 $ 0.8
2018 0.6
2019 0.5
2020 0.4
2021 0.4
Thereafter $ 0.9
Weighted average estimated remaining amortization period 6 years 9 months 18 days