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Amortization Expense for Amortized Intangible Assets (Detail)
$ in Thousands
Mar. 31, 2016
USD ($)
Finite-Lived Intangible Assets [Line Items]  
December 31, 2016 (nine months remaining) $ 1,279
December 31, 2017 1,705
December 31, 2018 1,541
December 31, 2019 1,526
December 31, 2020 $ 1,190