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Net Income per Common Share (Tables)
 12 Months Ended
Jul. 31, 2013
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,
 
2013
 
2012
 
2011
 
Numerator: (in thousands)
 
 
 
 
 
 
(Loss) earnings from continuing operations
$
(140,816
)
 
$
102,471

 
$
105,957

 
Less:
 
 
 
 
 
 
Restricted stock dividends
(238
)
 
(229
)
 
(223
)
 
Numerator for basic and diluted earnings from continuing operations per Class A Nonvoting Common Share
$
(141,054
)
 
$
102,242

 
$
105,734

 
Less:
 
 
 
 
 
 
Preferential dividends
(797
)
 
(818
)
 
(820
)
 
Preferential dividends on dilutive stock options
(5
)
 
(5
)
 
(6
)
 
Numerator for basic and diluted earnings from continuing operations per Class B Voting Common Share
$
(141,856
)
 
$
101,419

 
$
104,908

 
Denominator: (in thousands)
 
 
 
 
 
 
Denominator for basic earnings from continuing operations per share for both Class A and Class B
51,330

 
52,453

 
52,639

 
Plus: Effect of dilutive stock options
—

 
368

 
494

 
Denominator for diluted earnings from continuing operations per share for both Class A and Class B
51,330

 
52,821

 
53,133

 
(Loss) earnings from continuing operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
Basic
$
(2.75
)
 
$
1.95

 
$
2.01

 
Diluted
$
(2.75
)
 
$
1.94

 
$
1.99

 
(Loss) earnings from continuing operations per Class B Voting Common Share:
 
 
 
 
 
 
Basic
$
(2.76
)
 
$
1.93

 
$
1.99

 
Diluted
$
(2.76
)
 
$
1.92

 
$
1.97

 
(Loss) earnings from discontinued operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
Basic
$
(0.27
)
 
$
(2.30
)
 
$
0.05

 
Diluted
$
(0.27
)
 
$
(2.29
)
 
$
0.05

 
(Loss) earnings from discontinued operations per Class B Voting Common Share:
 
 
 
 
 
 
Basic
$
(0.27
)
 
$
(2.29
)
 
$
0.05

 
Diluted
$
(0.27
)
 
$
(2.28
)
 
$
0.05

 
Net (loss) earnings per Class A Nonvoting Common Share:
 
 
 
 
 
 
Basic
$
(3.02
)
 
$
(0.35
)
 
$
2.06

 
Diluted
$
(3.02
)
 
$
(0.35
)
 
$
2.04

 
Net (loss) earnings per Class B Voting Common Share:
 
 
 
 
 
 
Basic
$
(3.03
)
 
$
(0.36
)
 
$
2.04

 
Diluted
$
(3.03
)
 
$
(0.36
)
 
$
2.03