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Net Income per Common Share (Tables)
 6 Months Ended
Jan. 31, 2014
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,
 
2014
 
2013
 
2014
 
2013
Numerator: (in thousands)
 
 
 
 
 
 
 
Earnings (loss) from continuing operations
$
10,517

 
$
(10,671
)
 
$
28,652

 
$
15,620

Less:
 
 
 
 
 
 
 
Restricted stock dividends
(16
)
 
(60
)
 
(61
)
 
(119
)
Numerator for basic and diluted earnings (loss) from continuing operations per Class A Nonvoting Common Share
$
10,501

 
$
(10,731
)
 
$
28,591

 
$
15,501

Less:
 
 
 
 
 
 
 
Preferential dividends
—

 
—

 
(813
)
 
(797
)
Preferential dividends on dilutive stock options
—

 
—

 
(6
)
 
(4
)
Numerator for basic and diluted earnings (loss) from continuing operations per Class B Voting Common Share
$
10,501

 
$
(10,731
)
 
$
27,772

 
$
14,700

Denominator: (in thousands)
 
 
 
 
 
 
 
Denominator for basic earnings (loss) from continuing operations per share for both Class A and Class B
52,208

 
51,177

 
52,140

 
51,108

Plus: Effect of dilutive stock options
286

 
—

 
317

 
399

Denominator for diluted earnings (loss) from continuing operations per share for both Class A and Class B
52,494

 
51,177

 
52,457

 
51,507

Earnings (loss) from continuing operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.20

 
$
(0.21
)
 
$
0.55

 
$
0.30

Diluted
$
0.20

 
$
(0.21
)
 
$
0.55

 
$
0.30

Earnings (loss) from continuing operations per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.20

 
$
(0.21
)
 
$
0.53

 
$
0.29

Diluted
$
0.20

 
$
(0.21
)
 
$
0.53

 
$
0.29

Earnings from discontinued operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.11

 
$
0.04

 
$
0.22

 
$
0.06

Diluted
$
0.11

 
$
0.04

 
$
0.22

 
$
0.06

Earnings from discontinued operations per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.11

 
$
0.04

 
$
0.23

 
$
0.05

Diluted
$
0.11

 
$
0.04

 
$
0.22

 
$
0.05

Net earnings (loss) per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.31

 
$
(0.17
)
 
$
0.77

 
$
0.36

Diluted
$
0.31

 
$
(0.17
)
 
$
0.77

 
$
0.36

Net earnings (loss) per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.31

 
$
(0.17
)
 
$
0.76

 
$
0.34

Diluted
$
0.31

 
$
(0.17
)
 
$
0.75

 
$
0.34