Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Aug. 31, 2020	May 31, 2020	Aug. 31, 2019	May 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Numerator:
Net income for basic and diluted earnings per common share	$ (1,790)	$ 5,541	$ 15,558	$ 21,284	$ 3,751	$ 36,842
Denominator:
Denominator for basic earnings per common share-weighted average shares (shares)	26,175		26,197		26,166	26,161
Effect of dilutive securities:
Employee and Director stock awards (shares)	0		75		32	72
Denominator for diluted earnings per common share (shares)	26,175		26,272		26,198	26,233
Earnings per share basic and diluted:
Basic earnings per Common share (usd per share)	$ (0.07)		$ 0.59		$ 0.14	$ 1.41
Diluted earnings per common share (usd per share)	$ (0.07)		$ 0.59		$ 0.14	$ 1.40

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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