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. 28, 2023		24,912
Balance, beginning balance at Feb. 28, 2023	$ 619,738	$ 24,912	$ 93,357	$ 506,042	$ (4,573)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	6,207		6,207
Common stock issued under stock-based plans and related income tax expense (shares)		123
Common stock issued under stock-based plans and related tax expense	(791)	$ 123	(914)
Common stock issued under employee stock purchase plan (shares)		42
Common stock issued under employee stock purchase plan	1,465	$ 42	1,423
Dividends on Series A Preferred Stock	(10,800)			(10,800)
Cash dividends paid on common shares	(12,751)			(12,751)
Redemption premium on Series A Preferred Stock	0
Net income available to common shareholders	83,744			83,744
Other comprehensive loss	616				616
Balance, ending balance (shares) at Nov. 30, 2023		25,077
Balance, ending balance at Nov. 30, 2023	687,428	$ 25,077	100,073	566,235	(3,957)
Balance, beginning balance (shares) at Aug. 31, 2023		25,077
Balance, beginning balance at Aug. 31, 2023	664,355	$ 25,077	97,884	547,208	(5,814)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,189		2,189
Dividends on Series A Preferred Stock	(3,600)			(3,600)
Cash dividends paid on common shares	(4,263)			(4,263)
Redemption premium on Series A Preferred Stock	0
Net income available to common shareholders	26,890			26,890
Other comprehensive loss	1,857				1,857
Balance, ending balance (shares) at Nov. 30, 2023		25,077
Balance, ending balance at Nov. 30, 2023	687,428	$ 25,077	100,073	566,235	(3,957)
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 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)
Redemption premium on Series A Preferred Stock	0
Net income available to common shareholders	33,603			33,603
Other comprehensive 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)