Earnings Per Common Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Footnote) (Details) - RSUs and LTIP Units - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
RSUs vested (in shares)			0
Common shares issued (in shares)	1,191,000	1,429,000	1,191,000	1,429,000
Weighted average common shares outstanding — diluted (in shares)	0	1,429,000	1,146,000	1,555,000