Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Income Statement [Abstract]
Sales	$ 417,275	$ 409,007	$ 839,237	$ 822,215
Cost of sales	315,983	305,493	633,815	616,031
Gross margin	101,292	103,514	205,422	206,184
Selling, general and administrative	32,831	35,868	67,412	68,789
Operating income	68,461	67,646	138,010	137,395
Interest expense	(13,665)	(21,909)	(32,228)	(44,683)
Equity in earnings of unconsolidated subsidiaries	59,345	1,478	232,868	5,302
Other income, net	188	417	1,515	621
Income before income taxes	114,329	47,632	340,165	98,635
Income tax expense	24,983	12,213	79,911	23,614
Net income	89,346	35,419	260,254	75,021
Series A Preferred Stock Dividends	0	0	0	(1,200)
Redemption premium on Series A Preferred Stock	0	0	0	(75,198)
Net income (loss) available to common shareholders	$ 89,346	$ 35,419	$ 260,254	$ (1,377)
Basic Earnings (Loss) Per Share [Abstract]
Basic earnings per common share (usd per share)	$ 2.97	$ 1.19	$ 8.68	$ (0.05)
Diluted Earnings (Loss) Per Share [Abstract]
Diluted earnings per common share (usd per share)	$ 2.95	$ 1.18	$ 8.61	$ (0.05)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted average number common shares, basic (shares)	30,037,000	29,852,000	29,992,000	28,294,000
Weighted average number common shares, diluted (shares)	30,244,000	30,057,000	30,243,000	28,294,000
Cash dividends declared per common share (usd per share)	$ 0.20	$ 0.17	$ 0.37	$ 0.34