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Estimated Amortization Expense of Existing Finite-Lived Intangible Assets (Detail)
$ in Thousands
Sep. 30, 2017
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Remainder of fiscal 2017 $ 8,806
Fiscal 2018 23,263
Fiscal 2019 12,166
Fiscal 2020 3,926
Fiscal 2021 and thereafter $ 668