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Share-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2016
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
The following table summarizes our restricted stock award activity:
 
 
Shares
 
Weighted Average Grant Date Fair Value Per Share
 
 
 
 
 
 
Granted on May 26, 2016
 
74,376

 
$
63.94

Vested
 

 

Forfeited
 

 

Unvested at June 30, 2016
 
74,376

 
$
63.94