Revenue Recognition, Contracts with Customers, Accounts Receivable, net and Contract Liability Balances (Details) - USD ($) $ in Thousands		3 Months Ended
		Jul. 31, 2021	Apr. 30, 2021
Balances from contracts with customers [Abstract]
Accounts receivable, net		$ 284,579	$ 311,571
Contract liabilities	[1]	418,459	545,425
Contract liabilities (included in Other long-term liabilities)		18,382	19,560
Increase/(decrease) [Abstract]
Accounts receivable, net		(26,992)
Contract liabilities	[1]	(126,966)
Contract liabilities (included in Other long-term liabilities)		(1,178)
Sales return reserve recorded in contract liability		$ 40,700	$ 38,000
Revenue recognized from beginning contract liability, percentage		40.00%

[1] The sales return reserve recorded in Contract liabilities is $40.7 million and $38.0 million, as of July 31, 2021 and April 30, 2021, respectively.