Equity - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2026	Feb. 28, 2025	Feb. 28, 2026	Feb. 28, 2025
AOCI, Net of Tax
Beginning balance	$ 3,074,044	$ 2,945,168	$ 3,103,466	$ 3,012,169
Ending balance	3,096,729	3,031,186	3,096,729	3,031,186
Total
AOCI, Net of Tax
Beginning balance	(2,233)	(1,342)	(2,236)	(1,416)
Changes in unrealized gains			0	803
Realized (gains) losses reclassified to earnings	2	(22)	5	(751)
Ending balance	(2,231)	(1,364)	(2,231)	(1,364)
Unrealized Gains on Derivative Hedges
AOCI, Net of Tax
Beginning balance	2,700	3,169	2,935	3,287
Changes in unrealized gains			0	803
Realized (gains) losses reclassified to earnings	(117)	(117)	(352)	(1,038)
Ending balance	2,583	3,052	2,583	3,052
Unrealized Losses on Defined Benefit Plans
AOCI, Net of Tax
Beginning balance	(4,933)	(4,511)	(5,171)	(4,703)
Changes in unrealized gains			0	0
Realized (gains) losses reclassified to earnings	119	95	357	287
Ending balance	$ (4,814)	$ (4,416)	$ (4,814)	$ (4,416)