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Net Income per Common Share (Tables) | 9 Months Ended
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Apr. 30, 2017
Earnings Per Share [Abstract] |
Reconciliations of Numerator and Denominator of Basic and Diluted Per Share | Reconciliations of the numerator and denominator of the basic and diluted per share computations for the Company’s Class A and Class B common stock are summarized as follows:
| Three months ended April 30, |  | Nine months ended April 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Numerator: (in thousands) |  |  |  |  |  |  |
Earnings (Numerator for basic and diluted Class A Nonvoting Common Share) | $ | 22,553 |  |  | $ | 20,981 |  |  | $ | 70,403 |  |  | $ | 54,974 |
Less: |  |  |  |  |  |  |
Preferential dividends | — |  |  | — |  |  | (788 | ) |  | (783 | )
Preferential dividends on dilutive stock options | — |  |  | — |  |  | (14 | ) |  | (1 | )
Numerator for basic and diluted earnings per Class B Voting Common Share | $ | 22,553 |  |  | $ | 20,981 |  |  | $ | 69,601 |  |  | $ | 54,190 |
Denominator: (in thousands) |  |  |  |  |  |  |
Denominator for basic earnings per share for both Class A and Class B | 51,227 |  |  | 50,251 |  |  | 50,972 |  |  | 50,602 |
Plus: Effect of dilutive stock options and restricted stock units | 974 |  |  | 254 |  |  | 910 |  |  | 145 |
Denominator for diluted earnings per share for both Class A and Class B | 52,201 |  |  | 50,505 |  |  | 51,882 |  |  | 50,747 |
Net earnings per Class A Nonvoting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.44 |  |  | $ | 0.42 |  |  | $ | 1.38 |  |  | $ | 1.09 |
Diluted | $ | 0.43 |  |  | $ | 0.42 |  |  | $ | 1.36 |  |  | $ | 1.08 |
Net earnings per Class B Voting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.44 |  |  | $ | 0.42 |  |  | $ | 1.37 |  |  | $ | 1.07 |
Diluted | $ | 0.43 |  |  | $ | 0.42 |  |  | $ | 1.34 |  |  | $ | 1.07 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + 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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