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Capital Stock (Tables)
12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Schedule of Dividends Payable
We have paid the following dividends to holders of our common stock for the years ended December 31, 2017 and 2016:

Payment Date
 
Record Date
 
Dividend
per Share
April 12, 2016
 
March 31, 2016
 
$0.125
July 12, 2016
 
June 30, 2016
 
$0.125
October 12, 2016
 
September 30, 2016
 
$0.125
January 12, 2017
 
December 30, 2016
 
$0.125
April 12, 2017
 
March 31, 2017
 
$0.125
July 12, 2017
 
June 30, 2017
 
$0.125
October 12, 2017
 
September 29, 2017
 
$0.125
January 12, 2018
 
December 29, 2017
 
$0.125