Condensed Consolidated Statement of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance, beginning balance (shares) at Feb. 29, 2024		25,102
Balance, beginning balance at Feb. 29, 2024	$ 700,769	$ 25,102	$ 103,330	$ 576,231	$ (3,894)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	7,438		7,438
Common stock issued under stock-based plans and related income tax expense (shares)		132
Common stock issued under stock-based plans and related tax expense	(4,967)	$ 132	(5,099)
Common stock issued under employee stock purchase plan (shares)		43
Common stock issued under employee stock purchase plan	1,569	$ 43	1,526
Secondary public offering and issuance of additional common stock (in shares)		4,600
Secondary public offering and issuance of additional common stock	308,668	$ 4,600	304,068
Dividends on Series A Preferred Stock	(1,200)			(1,200)
Cash dividends paid on common shares	(9,343)			(9,343)
Redemption premium on Series A Preferred Stock	(75,198)			(75,198)
Net income (loss) available to common shareholders	75,021			75,021
Other comprehensive income	(3,001)				(3,001)
Balance, ending balance (shares) at Aug. 31, 2024		29,877
Balance, ending balance at Aug. 31, 2024	999,756	$ 29,877	411,263	565,511	(6,895)
Balance, beginning balance (shares) at May. 31, 2024		29,814
Balance, beginning balance at May. 31, 2024	967,232	$ 29,814	405,309	535,168	(3,059)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	4,903		4,903
Common stock issued under stock-based plans and related income tax expense (shares)		20
Common stock issued under stock-based plans and related tax expense	(400)	$ 20	(420)
Common stock issued under employee stock purchase plan (shares)		43
Common stock issued under employee stock purchase plan	1,569	$ 43	1,526
Secondary public offering and issuance of additional common stock	(55)		(55)
Cash dividends paid on common shares	(5,076)			(5,076)
Net income (loss) available to common shareholders	35,419			35,419
Other comprehensive income	(3,836)				(3,836)
Balance, ending balance (shares) at Aug. 31, 2024		29,877
Balance, ending balance at Aug. 31, 2024	999,756	$ 29,877	411,263	565,511	(6,895)
Balance, beginning balance (shares) at Feb. 28, 2025		29,913
Balance, beginning balance at Feb. 28, 2025	1,045,495	$ 29,913	418,004	609,158	(11,580)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	9,424		9,424
Common stock issued under stock-based plans and related income tax expense (shares)		109
Common stock issued under stock-based plans and related tax expense	(5,007)	$ 109	(5,116)
Common stock issued under employee stock purchase plan (shares)		35
Common stock issued under employee stock purchase plan	2,056	$ 35	2,021
Cash dividends paid on common shares	(11,097)			(11,097)
Net income (loss) available to common shareholders	260,254			260,254
Other comprehensive income	1,906				1,906
Balance, ending balance (shares) at Aug. 31, 2025		30,057
Balance, ending balance at Aug. 31, 2025	1,303,031	$ 30,057	424,333	858,315	(9,674)
Balance, beginning balance (shares) at May. 31, 2025		30,007
Balance, beginning balance at May. 31, 2025	1,214,298	$ 30,007	418,399	774,981	(9,089)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	4,339		4,339
Common stock issued under stock-based plans and related income tax expense (shares)		15
Common stock issued under stock-based plans and related tax expense	(411)	$ 15	(426)
Common stock issued under employee stock purchase plan (shares)		35
Common stock issued under employee stock purchase plan	2,056	$ 35	2,021
Cash dividends paid on common shares	(6,012)			(6,012)
Net income (loss) available to common shareholders	89,346			89,346
Other comprehensive income	(585)				(585)
Balance, ending balance (shares) at Aug. 31, 2025		30,057
Balance, ending balance at Aug. 31, 2025	$ 1,303,031	$ 30,057	$ 424,333	$ 858,315	$ (9,674)