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Non-Controlling Interests, Preferred Shares, Common Shares and Common Shares in Treasury (Tables)
 12 Months Ended
Dec. 31, 2017
Common Shares [Member]  
Redeemable Noncontrolling Interest [Line Items]  
Common Share Dividends Declared

Common share dividends declared were as follows:

 

 

 

For the Year Ended December 31,

 

 

 

2017

 

 

2016

 

 

2015

 

Common share dividends declared per share

 

$

0.76

 

 

$

0.76

 

 

$

0.69