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Long-Term Debt, Net - Components of Long-Term Debt (Detail)
$ in Thousands
Oct. 31, 2020
USD ($)
Debt Instrument [Line Items]  
Total long-term debt, net $ 321,081
Convertible Notes- Equity portion, net of tax 68,330
Convertible Senior Notes Due 2025  
Debt Instrument [Line Items]  
Convertible notes principal 415,025
Less: unamortized discount (93,944)
Convertible notes, net $ 321,081