Subsequent Events (Tables)

12 Months Ended

Dec. 31, 2015

Subsequent Events [Abstract]

Schedule of Dividends Declared and Distributions Per Unit

On February 17, 2016, the Company declared the following dividends per share. The Operating Partnership will make an equivalent distribution per unit.

Share / Unit Class	Series E Preferred Stock and Unit		Series F Preferred Stock and Unit		Series G Preferred Stock and Unit		Series H Preferred Stock and Unit		Series I Preferred Stock and Unit		Common stock and common unit
Dividend and distribution amount	$	0.437500	$	0.414063	$	0.367188	$	0.460938	$	0.396875	$	0.880000
Dividend and distribution payable date	March 31, 2016		March 31, 2016		March 31, 2016		March 31, 2016		March 31, 2016		March 31, 2016
Dividend and distribution payable to holders of record on	March 15, 2016		March 15, 2016		March 15, 2016		March 15, 2016		March 15, 2016		March 15, 2016
Annual equivalent rate of dividend and distribution	$	1.750	$	1.656	$	1.469	$	1.844	$	1.588	$	3.520