Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Millions	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total
Balance, beginning at May. 31, 2024	$ 45.3	$ 493.9	$ 956.9	$ (297.5)	$ (8.8)	$ 1,189.8
Net income (loss)			18.0			18.0
Stock option activity		0.9		0.2		1.1
Restricted stock activity		(4.4)		4.2		(0.2)
Other comprehensive income (loss), net of tax					1.5	1.5
Balance, ending at Aug. 31, 2024	45.3	490.4	974.9	(293.1)	(7.3)	1,210.2
Balance, beginning at May. 31, 2024	45.3	493.9	956.9	(297.5)	(8.8)	1,189.8
Net income (loss)						(21.5)
Other comprehensive income (loss), net of tax						(3.3)
Balance, ending at Feb. 28, 2025	45.3	501.0	935.4	(287.0)	(12.1)	1,182.6
Balance, beginning at Aug. 31, 2024	45.3	490.4	974.9	(293.1)	(7.3)	1,210.2
Net income (loss)			(30.6)			(30.6)
Stock option activity		1.0		0.2		1.2
Restricted stock activity		4.1				4.1
Other comprehensive income (loss), net of tax					(3.3)	(3.3)
Balance, ending at Nov. 30, 2024	45.3	495.5	944.3	(292.9)	(10.6)	1,181.6
Net income (loss)			(8.9)			(8.9)
Stock option activity		0.5		6.2		6.7
Restricted stock activity		5.0		(0.3)		4.7
Other comprehensive income (loss), net of tax					(1.5)	(1.5)
Balance, ending at Feb. 28, 2025	45.3	501.0	935.4	(287.0)	(12.1)	1,182.6
Balance, beginning at May. 31, 2025	45.3	505.2	969.4	(302.7)	(5.6)	1,211.6
Net income (loss)			34.4			34.4
Stock option activity		2.5		4.2		6.7
Restricted stock activity		(4.2)		0.4		(3.8)
Other comprehensive income (loss), net of tax					0.4	0.4
Balance, ending at Aug. 31, 2025	45.3	503.5	1,003.8	(298.1)	(5.2)	1,249.3
Balance, beginning at May. 31, 2025	45.3	505.2	969.4	(302.7)	(5.6)	1,211.6
Net income (loss)						137.0
Other comprehensive income (loss), net of tax						0.9
Balance, ending at Feb. 28, 2026	48.8	784.5	1,106.4	(291.6)	(4.7)	1,643.4
Balance, beginning at Aug. 31, 2025	45.3	503.5	1,003.8	(298.1)	(5.2)	1,249.3
Net income (loss)			34.6			34.6
Issuance of common stock	3.5	270.4				273.9
Stock option activity		1.1		0.3		1.4
Restricted stock activity		3.2				3.2
Other comprehensive income (loss), net of tax					(1.2)	(1.2)
Balance, ending at Nov. 30, 2025	48.8	778.2	1,038.4	(297.8)	(6.4)	1,561.2
Net income (loss)			68.0			68.0
Stock option activity		2.4		7.3		9.7
Restricted stock activity		3.9		(1.1)		2.8
Other comprehensive income (loss), net of tax					1.7	1.7
Balance, ending at Feb. 28, 2026	$ 48.8	$ 784.5	$ 1,106.4	$ (291.6)	$ (4.7)	$ 1,643.4