Fair Value Measurements - Fair Value of Debt (Details) - Level 2 - USD ($) $ in Thousands	Jan. 31, 2023	Apr. 30, 2022
Carrying Amount
Fair Value Measurements
Senior Notes	$ 350,000	$ 350,000
Fair Value
Fair Value Measurements
Senior Notes	$ 290,500	$ 310,625

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant