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Earnings Per Share (Tables)
 6 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
Three Months Ended
 
Six Months Ended
 
December 31,
 
December 31,
 
2011
 
2010
 
2011
 
2010
Net Income
$
38,525

 
$
36,045

 
$
74,999

 
$
67,816

Common share information:
 
 
 
 
 
 
 
Weighted average shares outstanding for basic earnings per share
86,572

 
85,770

 
86,488

 
85,620

Dilutive effect of stock options and restricted stock
799

 
753

 
765

 
715

Weighted average shares outstanding for diluted earnings per share
87,371

 
86,523

 
87,253

 
86,335

Basic earnings per share
$
0.45

 
$
0.42

 
$
0.87

 
$
0.79

Diluted earnings per share
$
0.44

 
$
0.42

 
$
0.86

 
$
0.79