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Earnings Per Share (Tables)
 3 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
Three Months Ended September 30,
 
2013
 
2012
Net Income
$
49,788

 
$
42,475

Common share information:
 
 
 
Weighted average shares outstanding for basic earnings per share
85,294

 
86,109

Dilutive effect of stock options and restricted stock
560

 
496

Weighted average shares outstanding for diluted earnings per share
85,854

 
86,605

Basic earnings per share
$
0.58

 
$
0.49

Diluted earnings per share
$
0.58

 
$
0.49