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Net Income per Common Share (Tables)
 9 Months Ended
Apr. 30, 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 April 30,
 
Nine months ended April 30,
 
2019
 
2018
 
2019
 
2018
Numerator:
 
 
 
 
 
 
 
Income (Numerator for basic and diluted Class A Nonvoting Common Share)
$
34,781

 
$
26,000

 
$
94,645

 
$
56,109

Less:
 
 
 
 
 
 
 
Preferential dividends
—

 
—

 
(815
)
 
(799
)
Preferential dividends on dilutive stock options
—

 
—

 
(13
)
 
(16
)
Numerator for basic and diluted income per Class B Voting Common Share
$
34,781

 
$
26,000

 
$
93,817

 
$
55,294

Denominator: (in thousands)
 
 
 
 
 
 
 
Denominator for basic income per share for both Class A and Class B
52,766

 
51,747

 
52,499

 
51,628

Plus: Effect of dilutive stock options and restricted stock units
714

 
982

 
716

 
982

Denominator for diluted income per share for both Class A and Class B
53,480

 
52,729

 
53,215

 
52,610

Net Income per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.66

 
$
0.50

 
$
1.80

 
$
1.09

Diluted
$
0.65

 
$
0.49

 
$
1.78

 
$
1.07

Net Income per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.66

 
$
0.50

 
$
1.79

 
$
1.07

Diluted
$
0.65

 
$
0.49

 
$
1.76

 
$
1.05