CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total
Balance at May. 31, 2022	$ 45.3	$ 477.5	$ 820.4	$ (289.1)	$ (19.6)	$ 1,034.5
Net income (loss)			90.2			90.2
Stock option activity		0.3		19.2		19.5
Restricted stock activity		6.7		2.2		8.9
Repurchase of shares				(50.1)		(50.1)
Other Comprehensive Income (Loss), Net of Tax					(3.9)	(3.9)
Balance at May. 31, 2023	45.3	484.5	910.6	(317.8)	(23.5)	1,099.1
Net income (loss)			46.3			46.3
Stock option activity		2.9		21.7		24.6
Restricted stock activity		6.5		3.7		10.2
Repurchase of shares				(5.1)		(5.1)
Other Comprehensive Income (Loss), Net of Tax					14.7	14.7
Balance at May. 31, 2024	45.3	493.9	956.9	(297.5)	(8.8)	1,189.8
Net income (loss)	0.0	0.0	12.5	0.0	0.0	12.5
Stock option activity		3.2		6.6		9.8
Restricted stock activity		8.1		(1.7)		6.4
Repurchase of shares				(10.1)		(10.1)
Other Comprehensive Income (Loss), Net of Tax					3.2	3.2
Balance at May. 31, 2025	$ 45.3	$ 505.2	$ 969.4	$ (302.7)	$ (5.6)	$ 1,211.6