Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2024	Apr. 30, 2023	Apr. 30, 2022
Allowances for Accounts Receivable
Allowance Rollforward
Balance at beginning of period	$ (13,636)	$ (9,346)	$ (6,282)
Provision / Additions Charged to Costs and Expenses	(4,959)	(6,135)	(1,588)
Charged to Other Accounts	(2,382)	(1,971)	(2,714)
Deductions	4,047	3,816	1,238
Balance at end of period	(16,930)	(13,636)	(9,346)
Valuation Allowance on Deferred Tax Assets
Allowance Rollforward
Balance at beginning of period	(11,708)	(11,719)	(11,768)
Provision / Additions Charged to Costs and Expenses	(1,008)	(443)	(1,248)
Deductions	175	454	1,297
Balance at end of period	$ (12,541)	$ (11,708)	$ (11,719)