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Amortization Expense for Amortized Intangible Assets (Detail)
$ in Thousands
Mar. 31, 2017
USD ($)
Finite-Lived Intangible Assets [Line Items]  
Amortization Expense, December 31, 2017 (nine months remaining) $ 2,265
Amortization Expense, December 31, 2018 2,832
Amortization Expense, December 31, 2019 2,799
Amortization Expense, December 31, 2020 2,494
Amortization Expense, December 31, 2021 $ 2,190