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Earnings Per Share (Tables)
 12 Months Ended
Jun. 30, 2017
Earnings Per Share, Basic and Diluted [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table reflects the reconciliation between basic and diluted earnings per share.
 
Year Ended June 30,
 
2017
 
2016
 
2015
Net Income
$
245,793

 
$
248,867

 
$
211,221

Common share information:
 
 
 
 
 
Weighted average shares outstanding for basic earnings per share
77,856

 
79,416

 
81,353

Dilutive effect of stock options and restricted stock
399

 
318

 
248

Weighted average shares outstanding for diluted earnings per share
78,255

 
79,734

 
81,601

Basic earnings per share
$
3.16

 
$
3.13

 
$
2.60

Diluted earnings per share
$
3.14

 
$
3.12

 
$
2.59