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Net Income Per Share (Tables) | 12 Months Ended
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Jul. 31, 2012
Earnings Per Share [Abstract] |
Schedule of reconciliation of basic weighted shares outstanding to diluted weighted average shares outstanding |
|  |  |  | Years Ended July 31, |
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|  |  |  | 2012 |  | 2011 |  | 2010
Weighted average common shares outstanding |  |  |  |  | 128,120 |  |  |  | 151,298 |  |  |  | 168,330 |
Effect of dilutive securities-stock options |  |  |  |  | 3,308 |  |  |  | 2,054 |  |  |  | 1,724 |
Diluted weighted average common shares outstanding |  |  |  |  | 131,428 |  |  |  | 153,352 |  |  |  | 170,054 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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