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Net Income per Common Share | 6 Months Ended
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Jan. 31, 2018
Earnings Per Share [Abstract] |
Net Income per Common Share | Net Earnings per Common 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,
| 2018 |  | 2017 |  | 2018 |  | 2017
Numerator: (in thousands) |  |  |  |  |  |  |
Earnings (Numerator for basic and diluted Class A Nonvoting Common Share) | $ | 4,273 |  |  | $ | 25,297 |  |  | $ | 30,109 |  |  | $ | 47,850 |
Less: |  |  |  |  |  |  |
Preferential dividends | — |  |  | — |  |  | (799 | ) |  | (788 | )
Preferential dividends on dilutive stock options | — |  |  | — |  |  | (16 | ) |  | (14 | )
Numerator for basic and diluted earnings per Class B Voting Common Share | $ | 4,273 |  |  | $ | 25,297 |  |  | $ | 29,294 |  |  | $ | 47,048 |
Denominator: (in thousands) |  |  |  |  |  |  |
Denominator for basic earnings per share for both Class A and Class B | 51,698 |  |  | 51,054 |  |  | 51,569 |  |  | 50,844 |
Plus: Effect of dilutive stock options and restricted stock units | 1,021 |  |  | 900 |  |  | 982 |  |  | 877 |
Denominator for diluted earnings per share for both Class A and Class B | 52,719 |  |  | 51,954 |  |  | 52,551 |  |  | 51,721 |
Net earnings per Class A Nonvoting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.08 |  |  | $ | 0.50 |  |  | $ | 0.58 |  |  | $ | 0.94 |
Diluted | $ | 0.08 |  |  | $ | 0.49 |  |  | $ | 0.57 |  |  | $ | 0.93 |
Net earnings per Class B Voting Common Share: |  |  |  |  |  |  |
Basic | $ | 0.08 |  |  | $ | 0.50 |  |  | $ | 0.57 |  |  | $ | 0.93 |
Diluted | $ | 0.08 |  |  | $ | 0.49 |  |  | $ | 0.56 |  |  | $ | 0.91 |
Options to purchase 705,069 and 768,617 shares of Class A Nonvoting Common Stock for the three months ended January 31, 2018 and 2017, respectively, and 721,100 and 770,010 shares for the six months ended January 31, 2018 and 2017, respectively, were not included in the computation of diluted net earnings per share because the option exercise price was greater than the average market price of the common shares and, therefore, the effect would have been anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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