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Goodwill and Other Intangible Assets - Schedule of Estimated Amortization Expense for Future (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2017 $ 2,835
2018 2,607
2019 2,489
2020 2,115
2021 $ 1,394