Leases - Summary of Maturities of Lease Liabilities (Detail) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Operating
2022	$ 56,636
2023	48,092
2024	41,216
2025	34,653
2026	29,350
Thereafter	20,734
Total lease payments	230,681
Less: imputed interest	26,697
Total	203,984
Financing
2022	1,084
2023	784
2024	439
2025	130
Total lease payments	2,437
Less: imputed interest	126
Total	$ 2,311	$ 2,875