CONSOLIDATED STATEMENTS OF EQUITY - 3 months ended Mar. 31, 2016 - USD ($) $ in Thousands	Series D Cumulative Redeemable Preferred Stock Preferred Stock	Series D Cumulative Redeemable Preferred Stock Cumulative Distributions	Series D Cumulative Redeemable Preferred Stock	Series E Cumulative Redeemable Preferred Stock Preferred Stock	Series E Cumulative Redeemable Preferred Stock Cumulative Distributions	Series E Cumulative Redeemable Preferred Stock	Common Stock	Additional Paid In Capital	Retained Earnings	Cumulative Distributions	Noncontrolling Interest in Consolidated Joint Venture	Total
Beginning Balance at Dec. 31, 2015	$ 115,000						$ 2,076	$ 2,458,889	$ 652,704	$ (927,868)	$ 50,319	$ 2,351,120
Beginning Balance (in shares) at Dec. 31, 2015	4,600,000						207,604,391
Increase (Decrease) in Stockholders' Equity
Net proceeds from sale of preferred stock				$ 115,000				(4,016)				110,984
Net proceeds from sale of preferred stock (in shares)				4,600,000
Deferred stock compensation, net							$ 15	1,519				1,534
Deferred stock compensation, net (in shares)							1,490,386
Issuance of common stock dividends							$ 74	78,749				78,823
Issuance of common stock dividends (in shares)							7,422,081
Common stock dividends and dividends payable										(10,826)		(10,826)
Preferred stock dividends and dividends payable		$ (2,300)	$ (2,300)		$ (466)	$ (466)
Distributions to noncontrolling interest											(775)	(775)
Net income (loss)									(434)		1,650	1,216
Ending Balance at Mar. 31, 2016	$ 115,000			$ 115,000			$ 2,165	$ 2,535,141	$ 652,270	$ (941,460)	$ 51,194	$ 2,529,310
Ending Balance (in shares) at Mar. 31, 2016	4,600,000			4,600,000			216,516,858