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Net Income per Common Share (Tables)
 12 Months Ended
Jul. 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:
 
Years ended July 31,
 
2015
 
2014
 
2013
Numerator: (in thousands)
 
 
 
 
 
Earnings (loss) from continuing operations
$
4,902

 
$
(48,146
)
 
$
(138,257
)
Less:
 
 
 
 
 
Restricted stock dividends
—

 
(92
)
 
(238
)
Numerator for basic and diluted earnings (loss) from continuing operations per Class A Nonvoting Common Share
$
4,902

 
$
(48,238
)
 
$
(138,495
)
Less:
 
 
 
 
 
Preferential dividends
(794
)
 
(813
)
 
(797
)
Preferential dividends on dilutive stock options
(1
)
 
(6
)
 
(5
)
Numerator for basic and diluted earnings (loss) from continuing operations per Class B Voting Common Share
$
4,107

 
$
(49,057
)
 
$
(139,297
)
Denominator: (in thousands)
 
 
 
 
 
Denominator for basic earnings from continuing operations per share for both Class A and Class B
51,285

 
51,866

 
51,330

Plus: Effect of dilutive stock options
98

 
—

 
—

Denominator for diluted earnings from continuing operations per share for both Class A and Class B
51,383

 
51,866

 
51,330

Earnings (loss) from continuing operations per Class A Nonvoting Common Share:
 
 
 
 
 
Basic
$
0.10

 
$
(0.93
)
 
$
(2.70
)
Diluted
$
0.10

 
$
(0.93
)
 
$
(2.70
)
Earnings (loss) from continuing operations per Class B Voting Common Share:
 
 
 
 
 
Basic
$
0.08

 
$
(0.95
)
 
$
(2.71
)
Diluted
$
0.08

 
$
(0.95
)
 
$
(2.71
)
(Loss) earnings from discontinued operations per Class A Nonvoting Common Share:
 
 
 
 
 
Basic
$
(0.04
)
 
$
0.04

 
$
(0.32
)
Diluted
$
(0.04
)
 
$
0.04

 
$
(0.32
)
(Loss) earnings from discontinued operations per Class B Voting Common Share:
 
 
 
 
 
Basic
$
(0.04
)
 
$
0.05

 
$
(0.32
)
Diluted
$
(0.04
)
 
$
0.05

 
$
(0.32
)
Net earnings (loss) per Class A Nonvoting Common Share:
 
 
 
 
 
Basic
$
0.06

 
$
(0.89
)
 
$
(3.02
)
Diluted
$
0.06

 
$
(0.89
)
 
$
(3.02
)
Net earnings (loss) per Class B Voting Common Share:
 
 
 
 
 
Basic
$
0.04

 
$
(0.90
)
 
$
(3.03
)
Diluted
$
0.04

 
$
(0.90
)
 
$
(3.03
)