Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Estimated Annual Amortization Expense Related to Amortizing Intangible Assets (Detail)

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Goodwill and Intangible Assets - Estimated Annual Amortization Expense Related to Amortizing Intangible Assets (Detail) - USD ($)
$ in Thousands
Apr. 30, 2020
Apr. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]    
2021 $ 19,256  
2022 19,101  
2023 17,271  
2024 14,794  
2025 14,696  
Thereafter 26,975  
Amortized intangible assets, Net $ 112,093 $ 83,022