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Revenue Recognition, Contracts with Customers - Assets Recognized for the Costs to Fulfill a Contract (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Oct. 31, 2022
Oct. 31, 2021
Apr. 30, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Costs capitalized $ 10,600   $ 10,600   $ 10,900
Amortization of capitalized contract cost 1,100 $ 1,300 2,300 $ 2,800  
Operating and administrative expenses 253,029 264,190 535,780 524,779  
Shipping and Handling          
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]          
Operating and administrative expenses $ 7,100 $ 7,200 $ 13,500 $ 14,000