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Goodwill and Intangible Assets - Estimated Annual Amortization Expense Related to Amortizing Intangible Assets (Detail) - USD ($)
$ in Thousands
Apr. 30, 2021
Apr. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]    
2022 $ 19,123  
2023 17,271  
2024 14,794  
2025 14,679  
2026 14,174  
Thereafter 12,908  
Amortized intangible assets, Net $ 92,949 $ 111,926