Consolidated Statement of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock Series A Preferred Stock	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss
Balance, beginning balance (shares) at Feb. 28, 2022			24,688
Balance, beginning balance at Feb. 28, 2022	$ 667,365		$ 24,688	$ 85,847	$ 584,154	$ (27,324)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	4,770			4,770
Issuance of Class A convertible preferred stock in exchange for convertible debt (in shares)		240
Issuance of Class A convertible preferred stock in exchange for convertible debt	233,722	$ 240		233,482
Common stock issued under stock-based plans and related income tax expense (shares)			122
Common stock issued under stock-based plans and related income tax expense	(2,306)		$ 122	(2,428)
Common stock issued under employee stock purchase plan (shares)			52
Common stock issued under employee stock purchase plan	1,767		$ 52	1,715
Dividends on preferred stock	(1,040)				(1,040)
Cash dividends paid on common shares	(8,418)				(8,418)
Net income (loss) available to common shareholders	(33,493)				(33,493)
Foreign currency translation	(2,746)					(2,746)
Balance, ending balance (shares) at Aug. 31, 2022		240	24,862
Balance, ending balance at Aug. 31, 2022	859,621	$ 240	$ 24,862	323,386	541,203	(30,070)
Balance, beginning balance (shares) at May. 31, 2022			24,788
Balance, beginning balance at May. 31, 2022	687,559		$ 24,788	85,432	604,039	(26,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	2,772			2,772
Issuance of Class A convertible preferred stock in exchange for convertible debt (in shares)		240
Issuance of Class A convertible preferred stock in exchange for convertible debt	233,722	$ 240		233,482
Common stock issued under stock-based plans and related income tax expense (shares)			22
Common stock issued under stock-based plans and related income tax expense	8		$ 22	(14)
Common stock issued under employee stock purchase plan (shares)			52
Common stock issued under employee stock purchase plan	1,766		$ 52	1,714
Dividends on preferred stock	(1,040)				(1,040)
Cash dividends paid on common shares	(4,226)				(4,226)
Net income (loss) available to common shareholders	(57,570)				(57,570)
Foreign currency translation	(3,370)					(3,370)
Balance, ending balance (shares) at Aug. 31, 2022		240	24,862
Balance, ending balance at Aug. 31, 2022	859,621	$ 240	$ 24,862	323,386	541,203	(30,070)
Balance, beginning balance (shares) at Feb. 28, 2023		240	24,912
Balance, beginning balance at Feb. 28, 2023	853,460	$ 240	$ 24,912	326,839	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 income 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 preferred stock	(7,200)				(7,200)
Cash dividends paid on common shares	(8,488)				(8,488)
Net income (loss) available to common shareholders	56,854				56,854
Foreign currency translation	(1,736)					(1,736)
Interest rate swap	495					495
Balance, ending balance (shares) at Aug. 31, 2023		240	25,077
Balance, ending balance at Aug. 31, 2023	898,077	$ 240	$ 25,077	331,366	547,208	(5,814)
Balance, beginning balance (shares) at May. 31, 2023		240	25,013
Balance, beginning balance at May. 31, 2023	871,373	$ 240	$ 25,013	326,931	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 income 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 preferred stock	(3,600)				(3,600)
Cash dividends paid on common shares	(4,253)				(4,253)
Net income (loss) available to common shareholders	28,332				28,332
Foreign currency translation	(2,867)					(2,867)
Interest rate swap	4,593					4,593
Balance, ending balance (shares) at Aug. 31, 2023		240	25,077
Balance, ending balance at Aug. 31, 2023	$ 898,077	$ 240	$ 25,077	$ 331,366	$ 547,208	$ (5,814)