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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2015
Stock-Based Compensation  
Schedule of weighted-average assumptions for stock options

 

 

2015

 

2014

 

Expected dividend yield

 
1.1 

%
1.2 

%

Expected life in years

 
5.71 

 
5.74 

 

Expected volatility

 
27.3 

%
29.3 

%

Risk-free interest rate

 
1.4 

%
1.7 

%

Weighted-average fair value

 

$
21.19 

 

$
19.15