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Dividends Dividends
 12 Months Ended
Dec. 31, 2017
Disclosure Cash Dividends [Abstract]  
Dividends
Dividends
All dividends of the Company are made on a discretionary basis as determined by the Board. The Company declares and pays the dividend on its commons shares in U.S. dollars. Dividends declared in Canadian equivalent dollars during the year were as follows:
 
2017
 
2016
 
Dividend
 
Dividend per share
 
Dividend
 
Dividend per share
Common shares
$
242,509

 
$
0.6084

 
$
149,158

 
$
0.5452

Series A preferred shares
$
5,400

 
$
1.1250

 
$
5,400

 
$
1.1250

Series D preferred shares
$
5,000

 
$
1.2500

 
$
5,000

 
$
1.2500