v3.26.1
Retirement Plans - Components of Net Pension Expense (Income) and Weighted-Average Assumptions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Curtailment/settlement (credit)   $ 200  
US      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost $ 0 0 $ 0
Interest cost 11,850 12,133 11,654
Expected return on plan assets (9,641) (9,610) (10,372)
Amortization of prior service cost (154) (154) (154)
Amortization of net actuarial loss 2,293 2,314 2,446
Curtailment/settlement (credit) 0 0 0
Net pension expense $ 4,348 $ 4,683 $ 3,574
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 5.70% 5.80% 5.10%
Expected return on plan assets 5.80% 5.80% 5.80%
Non-US      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost $ 499 $ 560 $ 532
Interest cost 17,479 16,603 16,069
Expected return on plan assets (18,371) (18,449) (19,443)
Amortization of prior service cost 60 66 60
Amortization of net actuarial loss 6,532 6,058 5,656
Curtailment/settlement (credit) 0 (181) 0
Net pension expense $ 6,199 $ 4,657 $ 2,874
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 5.50% 5.10% 4.80%
Rate of compensation increase 3.00% 3.00% 3.00%
Expected return on plan assets 6.20% 6.20% 6.40%