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Unaudited Quarterly Financial Information (Tables) | 12 Months Ended
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Jul. 31, 2017
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Information |
|  | Quarters
|  | First |  | Second |  | Third |  | Fourth |  | Total
Fiscal 2016 |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 283,073 |  |  | $ | 268,630 |  |  | $ | 286,816 |  |  | $ | 282,106 |  |  | $ | 1,120,625 |
Gross margin |  | 139,349 |  |  | 132,892 |  |  | 145,443 |  |  | 141,089 |  |  | 558,773 |
Operating income |  | 30,102 |  |  | 23,589 |  |  | 30,784 |  |  | 33,403 |  |  | 117,878 |
Net earnings |  | 18,703 |  |  | 15,290 |  |  | 20,981 |  |  | 25,136 |  |  | 80,110 |
Net earnings per Class A Nonvoting Common Share: |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.37 |  |  | $ | 0.30 |  |  | $ | 0.42 |  |  | $ | 0.50 |  |  | $ | 1.59 |
Diluted |  | $ | 0.37 |  |  | $ | 0.30 |  |  | $ | 0.42 |  |  | $ | 0.49 |  |  | $ | 1.58 |
Fiscal 2017 |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 280,176 |  |  | $ | 268,001 |  |  | $ | 275,927 |  |  | $ | 289,212 |  |  | $ | 1,113,316 |
Gross margin |  | 140,358 |  |  | 134,158 |  |  | 139,909 |  |  | 143,867 |  |  | 558,292 |
Operating income |  | 33,208 |  |  | 29,962 |  |  | 31,550 |  |  | 36,295 |  |  | 131,015 |
Net earnings |  | 22,553 |  |  | 25,297 |  |  | 22,553 |  |  | 25,242 |  |  | 95,645 |
Net earnings per Class A Nonvoting Common Share: |  |  |  |  |  |  |  |  |  |
Basic * |  | $ | 0.45 |  |  | $ | 0.50 |  |  | $ | 0.44 |  |  | $ | 0.49 |  |  | $ | 1.87 |
Diluted |  | $ | 0.44 |  |  | $ | 0.49 |  |  | $ | 0.43 |  |  | $ | 0.48 |  |  | $ | 1.84 |

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=68076893&loc=d3e1280-108306 + Details
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