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Goodwill and Intangible Assets - Estimated Aggregate Amortization Expense (Details) - USD ($)
$ in Thousands
Jan. 31, 2021
Apr. 30, 2020
Estimated aggregate future amortization expense    
2021 (remaining three months) $ 13,088  
2022 47,346  
2023 39,511  
2024 32,259  
2025 26,682  
Thereafter 113,513  
Total $ 272,399 $ 300,517