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Net Income per Common Share (Tables)
 9 Months Ended
Apr. 30, 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 April 30,
 
Nine months ended April 30,
 
2013
 
2012
 
2013
 
2012
Numerator: (in thousands)
 
 
 
 
 
 
 
Earnings from continuing operations
$
21,838

 
$
28,039

 
$
37,669

 
$
84,328

Less:
 
 
 
 
 
 
 
Restricted stock dividends
(60
)
 
(57
)
 
(179
)
 
(172
)
Numerator for basic and diluted earnings from continuing operations per Class A Nonvoting Common Share
$
21,778

 
$
27,982

 
$
37,490

 
$
84,156

Less:
 
 
 
 
 
 
 
Preferential dividends
—

 
—

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

 
—

 
(5
)
 
(5
)
Numerator for basic and diluted earnings from continuing operations per Class B Voting Common Share
$
21,778

 
$
27,982

 
$
36,688

 
$
83,333

Denominator: (in thousands)
 
 
 
 
 
 
 
Denominator for basic earnings from continuing operations per share for both Class A and Class B
51,415

 
52,513

 
51,210

 
52,539

Plus: Effect of dilutive stock options
626

 
490

 
475

 
407

Denominator for diluted earnings from continuing operations per share for both Class A and Class B
52,041

 
53,003

 
51,685

 
52,946

Earnings from continuing operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.42

 
$
0.53

 
$
0.73

 
$
1.60

Diluted
$
0.42

 
$
0.53

 
$
0.73

 
$
1.59

Earnings from continuing operations per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.42

 
$
0.53

 
$
0.72

 
$
1.59

Diluted
$
0.42

 
$
0.53

 
$
0.71

 
$
1.57

(Loss) from discontinued operations per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
(0.34
)
 
$
—

 
$
(0.29
)
 
$
(2.17
)
Diluted
$
(0.34
)
 
$
(0.01
)
 
$
(0.29
)
 
$
(2.16
)
(Loss) from discontinued operations per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
(0.34
)
 
$
—

 
$
(0.30
)
 
$
(2.17
)
Diluted
$
(0.34
)
 
$
(0.01
)
 
$
(0.29
)
 
$
(2.15
)
Net earnings (loss) per Class A Nonvoting Common Share:
 
 
 
 
 
 
 
Basic
$
0.08

 
$
0.53

 
$
0.44

 
$
(0.57
)
Diluted
$
0.08

 
$
0.52

 
$
0.44

 
$
(0.57
)
Net earnings (loss) per Class B Voting Common Share:
 
 
 
 
 
 
 
Basic
$
0.08

 
$
0.53

 
$
0.42

 
$
(0.58
)
Diluted
$
0.08

 
$
0.52

 
$
0.42

 
$
(0.58
)