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v3.3.0.814

Quarterly Financial Information (Revisons to Previously Issued Unaudited Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
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Jul. 31, 2015 | Apr. 30, 2015 | Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2015 | Jul. 31, 2014 | Jul. 31, 2013
Net Sales | $ 610,578 | $ 575,588 | $ 588,537 | $ 596,510 | $ 668,226 | $ 624,234 | $ 581,622 | $ 599,384 | $ 2,371,213 | $ 2,473,466 | $ 2,436,948
Cost of sales |  | 381,488 | 385,449 |  |  |  |  |  | 1,562,629 | 1,595,640 | 1,589,821
Gross margin | 202,344 | 194,100 | 203,088 | 209,052 | 238,323 | 223,461 | 201,648 | 214,394 | 808,584 | 877,826 | 847,127
Operating income |  | 67,116 | 65,839 |  |  |  |  |  | 288,310 | 355,739 | 343,329
Earnings before income taxes |  | 67,849 | 65,424 |  |  |  |  |  | 288,603 | 360,703 | 348,181
Income taxes |  | 20,073 | 17,469 |  |  |  |  |  | 80,492 | 100,479 | 100,804
Net earnings | $ 56,433 | $ 47,776 | $ 47,955 | $ 55,947 | $ 72,956 | $ 67,336 | $ 58,340 | $ 61,592 | $ 208,111 | $ 260,224 | $ 247,377
Basic earnings per share | $ 0.41 | $ 0.35 | $ 0.35 | $ 0.40 | $ 0.51 | $ 0.46 | $ 0.40 | $ 0.42 | $ 1.51 | $ 1.79 | $ 1.67
Diluted earnings per share | $ 0.41 | $ .34 | $ 0.34 | $ 0.40 | $ 0.50 | $ 0.46 | $ 0.39 | $ 0.41 | $ 1.49 | $ 1.76 | $ 1.64
Comprehensive income |  | $ 46,989 | $ 1,786 |  |  |  |  |  | $ 91,931 | $ 251,887 | $ 311,792
As Previously Reported [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  | 568,013 | 596,944 |  |  |  |  |  |  |  |
Cost of sales |  | 376,040 | 391,469 |  |  |  |  |  |  |  |
Gross margin |  | 191,973 | 205,475 |  |  |  |  |  |  |  |
Operating income |  | 64,989 | 68,226 |  |  |  |  |  |  |  |
Earnings before income taxes |  | 65,722 | 67,811 |  |  |  |  |  |  |  |
Income taxes |  | 19,350 | 18,281 |  |  |  |  |  |  |  |
Net earnings |  | $ 46,372 | $ 49,530 |  |  |  |  |  |  |  |
Basic earnings per share |  | $ 0.34 | $ 0.36 |  |  |  |  |  |  |  |
Diluted earnings per share |  | $ 0.33 | $ 0.35 |  |  |  |  |  |  |  |
Comprehensive income |  | $ 45,585 | $ 3,361 |  |  |  |  |  |  |  |
Effect of Revision [Member] |  |  |  |  |  |  |  |  |  |  |
Net Sales |  | 7,575 | (8,407) |  |  |  |  |  |  |  |
Cost of sales |  | 5,448 | (6,020) |  |  |  |  |  |  |  |
Gross margin |  | 2,127 | (2,387) |  |  |  |  |  |  |  |
Operating income |  | 2,127 | (2,387) |  |  |  |  |  |  |  |
Earnings before income taxes |  | 2,127 | (2,387) |  |  |  |  |  |  |  |
Income taxes |  | 723 | (812) |  |  |  |  |  |  |  |
Net earnings |  | $ 1,404 | $ (1,575) |  |  |  |  |  |  |  |
Basic earnings per share |  | $ 0.01 | $ (0.01) |  |  |  |  |  |  |  |
Diluted earnings per share |  | $ 0.01 | $ (0.01) |  |  |  |  |  |  |  |
Comprehensive income |  | $ 1,404 | $ (1,575) |  |  |  |  |  |  |  |

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