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	11,234		11,234
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	(14,423)			(14,423)
Redemption premium on Series A Preferred Stock	(75,198)			(75,198)
Net income available to common shareholders	108,624			108,624
Other comprehensive income (loss)	(5,488)				(5,488)
Balance, ending balance (shares) at Nov. 30, 2024		29,877
Balance, ending balance at Nov. 30, 2024	1,029,588	$ 29,877	415,059	594,034	(9,382)
Balance, beginning balance (shares) at Aug. 31, 2024		29,877
Balance, beginning balance at Aug. 31, 2024	999,756	$ 29,877	411,263	565,511	(6,895)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	3,796		3,796
Cash dividends paid on common shares	(5,080)			(5,080)
Net income available to common shareholders	33,603			33,603
Other comprehensive income (loss)	(2,487)				(2,487)
Balance, ending balance (shares) at Nov. 30, 2024		29,877
Balance, ending balance at Nov. 30, 2024	1,029,588	$ 29,877	415,059	594,034	(9,382)
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	11,891		11,891
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
Repurchase and retirement of treasury shares (shares)		(201)
Repurchase and retirement of common stock	(20,000)	$ (201)		(19,799)
Cash dividends paid on common shares	(17,099)			(17,099)
Net income available to common shareholders	301,329			301,329
Other comprehensive income (loss)	583				583
Balance, ending balance (shares) at Nov. 30, 2025		29,856
Balance, ending balance at Nov. 30, 2025	1,319,248	$ 29,856	426,800	873,589	(10,997)
Balance, beginning balance (shares) at Aug. 31, 2025		30,057
Balance, beginning balance at Aug. 31, 2025	1,303,031	$ 30,057	424,333	858,315	(9,674)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,467		2,467
Repurchase and retirement of treasury shares (shares)		(201)
Repurchase and retirement of common stock	(20,000)	$ (201)		(19,799)
Cash dividends paid on common shares	(6,002)			(6,002)
Net income available to common shareholders	41,075			41,075
Other comprehensive income (loss)	(1,323)				(1,323)
Balance, ending balance (shares) at Nov. 30, 2025		29,856
Balance, ending balance at Nov. 30, 2025	$ 1,319,248	$ 29,856	$ 426,800	$ 873,589	$ (10,997)