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Net Income per Common Share (Tables) | 12 Months Ended
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Jul. 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:
| Years ended July 31,
| 2017 |  | 2016 |  | 2015
Numerator (in thousands) |  |  |  |  |
Earnings from continuing operations (Numerator for basic and diluted earnings from continuing operations per Class A Nonvoting Common Share) | $ | 95,645 |  |  | $ | 80,110 |  |  | $ | 4,902 |
Less: |  |  |  |  |
Preferential dividends | (788 | ) |  | (783 | ) |  | (794 | )
Preferential dividends on dilutive stock options | (14 | ) |  | (1 | ) |  | (1 | )
Numerator for basic and diluted earnings from continuing operations per Class B Voting Common Share | $ | 94,843 |  |  | $ | 79,326 |  |  | $ | 4,107 |
Denominator (in thousands) |  |  |  |  |
Denominator for basic earnings from continuing operations per share for both Class A and Class B | 51,056 |  |  | 50,541 |  |  | 51,285 |
Plus: Effect of dilutive stock options | 900 |  |  | 228 |  |  | 98 |
Denominator for diluted earnings from continuing operations per share for both Class A and Class B | 51,956 |  |  | 50,769 |  |  | 51,383 |
Earnings from continuing operations per Class A Nonvoting Common Share: |  |  |  |  |
Basic | $ | 1.87 |  |  | $ | 1.59 |  |  | $ | 0.10 |
Diluted | $ | 1.84 |  |  | $ | 1.58 |  |  | $ | 0.10 |
Earnings from continuing operations per Class B Voting Common Share: |  |  |  |  |
Basic | $ | 1.86 |  |  | $ | 1.57 |  |  | $ | 0.08 |
Diluted | $ | 1.83 |  |  | $ | 1.56 |  |  | $ | 0.08 |
Loss from discontinued operations per Class A Nonvoting Common Share: |  |  |  |  |
Basic | $ | — |  |  | $ | — |  |  | $ | (0.04 | )
Diluted | $ | — |  |  | $ | — |  |  | $ | (0.04 | )
Loss from discontinued operations per Class B Voting Common Share: |  |  |  |  |
Basic | $ | — |  |  | $ | — |  |  | $ | (0.04 | )
Diluted | $ | — |  |  | $ | — |  |  | $ | (0.04 | )
Net earnings per Class A Nonvoting Common Share: |  |  |  |  |
Basic | $ | 1.87 |  |  | $ | 1.59 |  |  | $ | 0.06 |
Diluted | $ | 1.84 |  |  | $ | 1.58 |  |  | $ | 0.06 |
Net earnings per Class B Voting Common Share: |  |  |  |  |
Basic | $ | 1.86 |  |  | $ | 1.57 |  |  | $ | 0.04 |
Diluted | $ | 1.83 |  |  | $ | 1.56 |  |  | $ | 0.04 |

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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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