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Goodwill and Intangible Assets - Estimated Future Amortization of Intangible Assets (Detail)
$ in Thousands
Jul. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
Remainder of fiscal 2020 $ 22,033
2021 75,568
2022 60,735
2023 44,733
2024 34,398
2025 and thereafter 36,657
IPR&D 1,214
Total $ 275,338