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Acquisitions - Summary of Operating Information on Pro Forma Basis (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
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Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2019 | Aug. 31, 2018
Business Combinations [Abstract] |  |  |  |
Pro forma net sales | $ 112,142 | $ 120,542 | $ 228,278 | $ 240,597
Pro forma net earnings | $ 8,684 | $ 10,096 | $ 18,252 | $ 20,001
Pro forma earnings per share - diluted | $ 0.33 | $ 0.39 | $ 0.70 | $ 0.78

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