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Acquisition - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Nov. 01, 2019
Apr. 30, 2021
Apr. 30, 2020
Business Acquisition [Line Items]      
Cash paid for acquisitions, net of cash acquired     $ 108,602
Increase in goodwill result of additional tax liabilities   $ 2,600  
Acquired Companies      
Business Acquisition [Line Items]      
Cash paid for acquisitions, net of cash acquired $ 108,600