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Stockholders' Equity Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2015
Stockholders' Equity Attributable to Parent [Abstract]  
QuarterlydividendsdeclaredTableTextBlock [Table Text Block]
Dividends

The Board declared quarterly dividends in 2015 and 2014 as follows:
 
 
2015
 
2014
 
 
 
(amounts per share)
 
First quarter
 
$
0.19

 
$
0.17

 
Second quarter
 
0.22

 
0.19

 
Third quarter
 
0.22

 
0.19

 
Fourth quarter
 
0.22

 
2.19

(1) 

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(1)    Includes a $2.00 per share special dividend