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Goodwill and Intangible Assets - Estimated Amortization Expense (Detail) - USD ($)
$ in Thousands
Apr. 30, 2020
Jan. 31, 2020
Intangible Assets, Net (Excluding Goodwill) [Abstract]    
Remaining for Fiscal 2021 $ 14,396  
Fiscal 2022 18,397  
Fiscal 2023 18,342  
Fiscal 2024 18,160  
Fiscal 2025 17,417  
Thereafter 42,691  
Total $ 129,403 $ 134,601