Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Numerator:
Net income for basic and diluted earnings per common share	$ 18,978	$ (1,790)	$ 41,315	$ 3,751
Denominator:
Denominator for basic earnings per common share-weighted average shares (shares)	24,947	26,175	24,999	26,166
Effect of dilutive securities:
Employee and Director stock awards (shares)	188	0	217	32
Denominator for diluted earnings per common share (shares)	25,135	26,175	25,216	26,198
Earnings per share basic and diluted:
Basic earnings per common share (usd per share)	$ 0.76	$ (0.07)	$ 1.65	$ 0.14
Diluted earnings per common share (usd per share)	$ 0.76	$ (0.07)	$ 1.64	$ 0.14