Business, Basis of Presentation and Summary of Significant Accounting Policies - Insurance Liabilities (Details) - General liability, workers' compensation and automobile - USD ($) $ in Thousands	Jan. 31, 2025	Apr. 30, 2024
Loss contingencies
Medical self‑insurance	$ 5,413	$ 6,067
General liability, automobile and workers’ compensation	29,338	22,731
Expected recoveries for insurance liabilities	$ (4,991)	$ (3,746)