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Net Income per Common Share (Tables)
 6 Months Ended
Jan. 31, 2013
Text Block [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,
 
2013
 
2012
 
2013
 
2012
Numerator: (in thousands)
 
 
 
 
 
 
 
Net (loss) income
$
(8,684
)
 
$
(89,954
)
 
$
18,504

 
$
(57,222
)
Less:
 
 
 
 
 
 
 
Restricted stock dividends
(60
)
 
(57
)
 
(119
)
 
(115
)
Numerator for basic and diluted Class A net (loss) income per share
$
(8,744
)
 
$
(90,011
)
 
$
18,385

 
$
(57,337
)
Less:
 
 
 
 
 
 
 
Preferential dividends
—

 
—

 
(797
)
 
(818
)
Preferential dividends on dilutive stock options
—

 
—

 
(5
)
 
(5
)
Numerator for basic and diluted Class B net (loss) income per share
$
(8,744
)
 
$
(90,011
)
 
$
17,583

 
$
(58,160
)
Denominator: (in thousands)
 
 
 
 
 
 
 
Denominator for basic net (loss) income per share for both Class A and Class B
51,177

 
52,447

 
51,108

 
52,552

Plus: Effect of dilutive stock options
—

 
—

 
399

 
—

Denominator for diluted net (loss) income per share for both Class A and Class B
51,177

 
52,447

 
51,507

 
52,552

Class A Nonvoting Common Stock net (loss) income per share:
 
 
 
 
 
 
 
Basic
$
(0.17
)
 
$
(1.72
)
 
$
0.36

 
$
(1.09
)
Diluted
$
(0.17
)
 
$
(1.72
)
 
$
0.36

 
$
(1.09
)
Class B Voting Common Stock net (loss) income per share:
 
 
 
 
 
 
 
Basic
$
(0.17
)
 
$
(1.72
)
 
$
0.34

 
$
(1.11
)
Diluted
$
(0.17
)
 
$
(1.72
)
 
$
0.34

 
$
(1.11
)