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Net Income per Common Share (Tables) | 6 Months Ended
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Jan. 31, 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 January 31, |  | Six months ended January 31,
| 2017 |  | 2016 |  | 2017 |  | 2016
Numerator: (in thousands) |  |  |  |  |  |  |
Earnings (Numerator for basic and diluted Class A Nonvoting Common Share) | $ | 25,297 |  |  | $ | 15,290 |  |  | $ | 47,850 |  |  | $ | 33,993 |
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 | $ | 25,297 |  |  | $ | 15,290 |  |  | $ | 47,048 |  |  | $ | 33,209 |
Denominator: (in thousands) |  |  |  |  |  |  |
Denominator for basic earnings per share for both Class A and Class B | $ | 51,054 |  |  | $ | 50,527 |  |  | $ | 50,844 |  |  | $ | 50,778 |
Plus: Effect of dilutive stock options and restricted stock units | 900 |  |  | 120 |  |  | 877 |  |  | 90 |
Denominator for diluted earnings per share for both Class A and Class B | $ | 51,954 |  |  | $ | 50,647 |  |  | $ | 51,721 |  |  | $ | 50,868 |
Net earnings per Class A Nonvoting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.50 |  |  | $ | 0.30 |  |  | $ | 0.94 |  |  | $ | 0.67 |
Diluted | $ | 0.49 |  |  | $ | 0.30 |  |  | $ | 0.93 |  |  | $ | 0.67 |
Net earnings per Class B Voting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.50 |  |  | $ | 0.30 |  |  | $ | 0.93 |  |  | $ | 0.65 |
Diluted | $ | 0.49 |  |  | $ | 0.30 |  |  | $ | 0.91 |  |  | $ | 0.65 |

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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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