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Stockholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2016
Stockholders' Equity Note [Abstract]  
Schedule of Dividends Payable [Table Text Block]
The following table provides information about our per share dividends:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Per common share cash dividend declared for the period
$
0.125

 
$
0.49

 
$
0.250

 
$
0.97

Per common share cash dividend paid in the period
$
0.125

 
$
0.48

 
$
0.250

 
$
0.93