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	4,019		4,019
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	1,464	$ 42	1,422
Dividends on Series A Preferred Stock	(7,200)			(7,200)
Cash dividends paid on common shares	(8,488)			(8,488)
Redemption premium on Series A Preferred Stock	0
Net income (loss) available to common shareholders	56,854			56,854
Other comprehensive loss	(1,241)				(1,241)
Balance, ending balance (shares) at Aug. 31, 2023		25,077
Balance, ending balance at Aug. 31, 2023	664,355	$ 25,077	97,884	547,208	(5,814)
Balance, beginning balance (shares) at May. 31, 2023		25,013
Balance, beginning balance at May. 31, 2023	637,651	$ 25,013	93,449	526,729	(7,540)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,115		2,115
Common stock issued under stock-based plans and related income tax expense (shares)		22
Common stock issued under stock-based plans and related tax expense	920	$ 22	898
Common stock issued under employee stock purchase plan (shares)		42
Common stock issued under employee stock purchase plan	1,464	$ 42	1,422
Dividends on Series A Preferred Stock	(3,600)			(3,600)
Cash dividends paid on common shares	(4,253)			(4,253)
Redemption premium on Series A Preferred Stock	0
Net income (loss) available to common shareholders	28,332			28,332
Other comprehensive loss	1,726				1,726
Balance, ending balance (shares) at Aug. 31, 2023		25,077
Balance, ending balance at Aug. 31, 2023	664,355	$ 25,077	97,884	547,208	(5,814)
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 loss	(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 (in shares)		0
Secondary public offering and issuance of additional common stock	(55)	$ 0	(55)
Cash dividends paid on common shares	(5,076)			(5,076)
Redemption premium on Series A Preferred Stock	0
Net income (loss) available to common shareholders	35,419			35,419
Other comprehensive loss	(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)