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Net Income per Common Share (Tables) | 6 Months Ended
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Jan. 31, 2019
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,
| 2019 |  | 2018 |  | 2019 |  | 2018
Numerator: |  |  |  |  |  |  |
Earnings (Numerator for basic and diluted Class A Nonvoting Common Share) | $ | 29,227 |  |  | $ | 4,273 |  |  | $ | 59,864 |  |  | $ | 30,109 |
Less: |  |  |  |  |  |  |
Preferential dividends | — |  |  | — |  |  | (815 | ) |  | (799 | )
Preferential dividends on dilutive stock options | — |  |  | — |  |  | (13 | ) |  | (16 | )
Numerator for basic and diluted earnings per Class B Voting Common Share | $ | 29,227 |  |  | $ | 4,273 |  |  | $ | 59,036 |  |  | $ | 29,294 |
Denominator: (in thousands) |  |  |  |  |  |  |
Denominator for basic earnings per share for both Class A and Class B | 52,532 |  |  | 51,698 |  |  | 52,366 |  |  | 51,569 |
Plus: Effect of dilutive stock options and restricted stock units | 674 |  |  | 1,021 |  |  | 716 |  |  | 982 |
Denominator for diluted earnings per share for both Class A and Class B | 53,206 |  |  | 52,719 |  |  | 53,082 |  |  | 52,551 |
Net earnings per Class A Nonvoting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.56 |  |  | $ | 0.08 |  |  | $ | 1.14 |  |  | $ | 0.58 |
Diluted | $ | 0.55 |  |  | $ | 0.08 |  |  | $ | 1.13 |  |  | $ | 0.57 |
Net earnings per Class B Voting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.56 |  |  | $ | 0.08 |  |  | $ | 1.13 |  |  | $ | 0.57 |
Diluted | $ | 0.55 |  |  | $ | 0.08 |  |  | $ | 1.11 |  |  | $ | 0.56 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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