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Intangible Assets - Estimated Amortization Expense (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Remainder of 2017 $ 1,864
2018 2,439
2019 2,439
2020 2,264
2021 2,125
2022 $ 2,085