Employee Benefit Plans - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit liability	$ 16,000	$ 17,700
Unrecognized net actuarial loss	$ 800	$ 3,000
Expected return on plan assets	4.90%	5.20%
Expected contributions next twelve months	$ 5,100
Expected contributions in year one	3,700
Expected contributions in year two	3,900
Expected contributions in year three	4,100
Expected contributions in year four	4,200
Expected contributions in year five	4,400
Expected contributions thereafter	44,000
Fair value of plan assets	48,272	$ 60,038	$ 66,723
Projected benefit obligation	64,311	77,739	84,546
Employer contributions	821	0
Supplemental Executive Retirement Plan (SERP)
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 13,100	12,300	10,500
United States Plan
Defined Benefit Plan Disclosure [Line Items]
Required years of service for plan eligibility	1 year
Employer contributions	$ 115,100	99,100	85,000
Canada | DPSP and RRSP
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	4,200	3,700	$ 3,400
Pension Plan of Immaterial Acquisitions
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,700	7,800
Projected benefit obligation	$ 6,800	$ 6,900