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Goodwill and Other Intangible Assets - Summary of Estimated Intangible Asset Amortization Expense (Detail)
$ in Millions
Dec. 31, 2016
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2017 $ 1.2
2018 1.2
2019 0.8
2020 0.6
2021 0.3
Thereafter 2.3
Total $ 6.4