Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2023	Aug. 31, 2022
Numerator:
Net income from continuing operations	$ 28,332	$ 25,120	$ 56,854	$ 40,485
Dividends on preferred stock	3,600	1,040	7,200	1,040
Numerator for diluted earnings per share—net income (loss) available to common shareholders	28,332	(55,564)	56,854	(30,939)
Net income from continuing operations available to common shareholders	24,732	24,080	49,654	39,445
After-tax interest expense for Convertible Notes	0	2,006	0	2,554
Dividends on preferred stock	3,600	1,040	7,200	1,040
Numerator for diluted earnings per share continuing operations	28,332	27,126	56,854	43,039
Net income (loss) from discontinued operations	0	(82,690)	0	(73,978)
Net income (loss) available to common shareholders	$ 24,732	$ (58,610)	$ 49,654	$ (34,533)
Denominator:
Denominator for basic earnings per common share-weighted average shares (shares)	25,054,000	24,836,000	24,997,000	24,772,000
Effect of dilutive securities:
Employee and director stock awards	39,000	106,000	82,000	172,000
Convertible notes (shares)	0	2,953,000	0	1,902,000
Series A convertible preferred stock (shares)	4,117,000	1,164,000	4,117,000	582,000
Denominator for diluted earnings per common share (shares)	29,210,000	29,059,000	29,196,000	27,428,000
Earnings per common share from continuing operations
Earnings (loss) per common share from continuing operations (in dollars per share)	$ 0.99	$ 0.97	$ 1.99	$ 1.59
Earnings (loss) per common share from continuing operations (in dollars per share)	0.97	0.93	1.95	1.57
Earnings per common share from discontinued operations:
Earnings (loss) per common share from discontinued operations (in dollars per share)	0	(3.33)	0	(2.99)
Earnings (loss) per common share from discontinued operations (in dollars per share)	0	(2.85)	0	(2.70)
Computation of basic and diluted earnings per share
Basic earnings per common share (usd per share)	0.99	(2.36)	1.99	(1.39)
Diluted earnings per common share (usd per share)	$ 0.97	$ (1.91)	$ 1.95	$ (1.13)