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Acquisition - Erwin Hymer Group (Details 1) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
Business Combinations [Abstract] |  |  |  |
Net sales | $ 2,506,583 | $ 3,083,887 | $ 6,766,664 | $ 8,577,872
Net income | $ 42,579 | $ 100,613 | $ 61,418 | $ 237,472
Basic earnings per common share | $ 0.77 | $ 1.84 | $ 1.15 | $ 4.34
Diluted earnings per common share | $ 0.77 | $ 1.83 | $ 1.14 | $ 4.33

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