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Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions
The following assumptions were used to determine the grant date fair value of the equity component (February 17, 2016) and the period-end fair value of the liability component of the TSR Performance Share Awards:
 
 
Grant Date
 
September 30, 2016
Fair value per performance share award
 
$
18.57

 
$5.26 - $9.14
Assumptions:
 
 

 
 
     Stock price volatility
 
34.4
%
 
30.4% - 38.4%
     Risk free rate of return
 
0.9
%
 
0.3% - 0.8%