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Earnings per Share - Computation for Basic and Diluted Earnings (loss) per Share (Detail) - $ / shares | 12 Months Ended
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Feb. 28, 2021 | Feb. 29, 2020 | Feb. 28, 2019
Earnings Per Share [Abstract] |  |  |
Basic weighted average common shares outstanding | 25,995,127 | 26,036,393 | 25,829,804
Effect of dilutive options |  |  | 12,375
Diluted weighted average common shares outstanding | 25,995,127 | 26,036,393 | 25,842,179
Earnings per share |  |  |
Basic | $ 0.93 | $ 1.47 | $ 1.45
Diluted | 0.93 | 1.47 | 1.45
Cash dividends | $ 0.900 | $ 0.900 | $ 0.875

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