Share Incentive and Other Compensation - Schedule of Unvested Shares and LTIP Units (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares unvested, Beginning of period (in shares)	49,407	49,899
Shares granted (in shares)	19,442	24,583
Shares vested (in shares)	(21,771)	(24,886)
Shares forfeited (in shares)	(356)	(189)
Shares unvested, End of period (in shares)	46,722	49,407
Weighted Grant-Date Fair Value
Shares unvested, Weighted average grant date fair value, Beginning of period (in dollars per share)	$ 27.92	$ 25.90
Shares granted, Weighted average grant date fair value (in dollars per share)	29.85	33.35
Shares vested, Weighted average grant date fair value (in dollars per share)	30.91	29.17
Shares forfeited, Weighted average grant date fair value (in dollars per share)	35.56	35.37
Shares unvested, Weighted average grant date fair value, End of period(in dollars per share)	$ 27.28	$ 27.92
LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares unvested, Beginning of period (in shares)	856,877	1,020,121
Shares granted (in shares)	317,740	359,484
Shares vested (in shares)	(257,515)	(522,680)
Shares forfeited (in shares)	0	(48)
Shares unvested, End of period (in shares)	917,102	856,877
Weighted Grant-Date Fair Value
Shares unvested, Weighted average grant date fair value, Beginning of period (in dollars per share)	$ 26.99	$ 23.92
Shares granted, Weighted average grant date fair value (in dollars per share)	29.12	34.40
Shares vested, Weighted average grant date fair value (in dollars per share)	28.58	26.08
Shares forfeited, Weighted average grant date fair value (in dollars per share)	0.00	35.37
Shares unvested, Weighted average grant date fair value, End of period(in dollars per share)	$ 27.29	$ 26.99