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Dividends Declared and Paid - Dividend Information (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Aug. 31, 2015
Jul. 31, 2015
Jun. 30, 2015
May. 29, 2015
Apr. 30, 2015
Mar. 31, 2015
Feb. 27, 2015
Jan. 30, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2015
Sep. 30, 2014
Equity [Abstract]                            
Common share distribution amount (in dollars per share) $ 0.1 $ 0.1 $ 0.1 $ 0.1 $ 0.1 $ 0.1 $ 0.10 $ 0.10 $ 0.10 $ 0.3 $ 0.3 $ 0.3 $ 0.9 $ 0.69
LTIP unit distribution amount (in dollars per share) $ 0.1 $ 0.1 $ 0.1 $ 0.1 $ 0.1 $ 0.1 $ 0.10 $ 0.10 $ 0.10 $ 0.3 $ 0.3 $ 0.3 $ 0.9 $ 0.69