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Estimated Amortization Expense of Existing Finite-Lived Intangible Assets (Detail)
$ in Thousands
Jun. 30, 2018
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
Remainder of fiscal 2018 $ 13,051
Fiscal 2019 18,732
Fiscal 2020 10,450
Fiscal 2021 3,357
Fiscal 2022 and thereafter $ 8,523