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Net Income per Common Share (Tables)
 6 Months Ended
Jan. 31, 2015
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,
 
2015
 
2014
 
2015
 
2014
Numerator: (in thousands)
 
 
 
 
 
 
 
Earnings from continuing operations
$
11,584

 
$
10,517

 
$
27,083

 
$
28,652

Less:
 
 
 
 
 
 
 
Restricted stock dividends
—

 
(16
)
 
—

 
(61
)
Numerator for basic and diluted earnings from continuing operations per Class A Nonvoting Common Share
$
11,584

 
$
10,501

 
$
27,083

 
$
28,591

Less:
 
 
 
 
 
 
 
Preferential dividends
—

 
—

 
(794
)
 
(813
)
Preferential dividends on dilutive stock options
—

 
—

 
(1
)
 
(6
)
Numerator for basic and diluted earnings from continuing operations per Class B Voting Common Share
$
11,584

 
$
10,501

 
$
26,288

 
$
27,772

Denominator: (in thousands)
 
 
 
 
 
 
 
Denominator for basic earnings from continuing operations per share for both Class A and Class B
51,272

 
52,208

 
51,262

 
52,140

Plus: Effect of dilutive stock options
76

 
286

 
68

 
317

Denominator for diluted earnings from continuing operations per share for both Class A and Class B
51,348

 
52,494

 
51,330

 
52,457

Earnings from continuing operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.23

 
$
0.20

 
$
0.53

 
$
0.55

Diluted
$
0.23

 
$
0.20

 
$
0.53

 
$
0.55

Earnings from continuing operations per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.23

 
$
0.20

 
$
0.51

 
$
0.53

Diluted
$
0.23

 
$
0.20

 
$
0.51

 
$
0.53

(Loss) earnings from discontinued operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
—

 
$
0.11

 
$
(0.04
)
 
$
0.22

Diluted
$
—

 
$
0.11

 
$
(0.04
)
 
$
0.22

(Loss) earnings from discontinued operations per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
—

 
$
0.11

 
$
(0.03
)
 
$
0.23

Diluted
$
—

 
$
0.11

 
$
(0.04
)
 
$
0.22

Net earnings per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.23

 
$
0.31

 
$
0.49

 
$
0.77

Diluted
$
0.23

 
$
0.31

 
$
0.49

 
$
0.77

Net earnings per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.23

 
$
0.31

 
$
0.48

 
$
0.76

Diluted
$
0.23

 
$
0.31

 
$
0.47

 
$
0.75