Consolidated Statement of Changes in Equity - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Total	7.75% Series A Cumulative Redeemable Preferred Stock	8.375% Series B Cumulative Redeemable Preferred Stock	8.875% Series C Cumulative Redeemable Preferred Stock	Common Shares	Additional Paid In Capital	AOCI	Retained Earnings (Deficit)	Total Shareholders' Equity	Noncontrolling Interests
Beginning Balance at Dec. 31, 2017	$ 179,787	$ 53	$ 23	$ 17	$ 2,791	$ 2,094,804	$ 0	$ (1,921,533)	$ 176,155	$ 3,632
Beginning Balance (in shares) at Dec. 31, 2017		5,344,353	2,340,969	1,640,425	93,045,152
Cumulative effect adjustments from adoption of recently issued accounting pronouncements at Dec. 31, 2017	761						9,257	(8,496)	761
Adjusted Balance at Dec. 31, 2017	180,548	$ 53	$ 23	$ 17	$ 2,791	2,094,804	9,257	(1,930,029)	176,916	3,632
Net income (loss)	(84,728)							(84,728)	(84,728)
Preferred shares issued, net	4,366	$ 4	$ 2	$ 1		4,359			4,366
Preferred shares issued, net (shares)		383,147	167,828	117,605
Preferred dividends paid	(6,397)							(6,397)	(6,397)
Impact of Series D redemption	11,932							11,932	11,932
Common dividends declared	(105)							(105)	(105)
Other comprehensive income (loss), net	3,287						3,287		3,287
Share-based compensation	(277)					(277)			(277)
Issuance of noncontrolling interests	76									76
Distribution to noncontrolling interests	(15)									(15)
Acquisition of noncontrolling interests	(343)					3,239			3,239	(3,582)
Derecognition of noncontrolling interests	(111)									$ (111)
Common shares activity related to equity compensation	(74)				$ (15)	(59)			(74)
Common shares activity related to equity compensation (in shares)					(512,403)
Ending Balance at Jun. 30, 2018	$ 108,159	$ 57	$ 25	$ 18	$ 2,776	$ 2,102,066	$ 12,544	$ (2,009,327)	$ 108,159
Ending Balance (in shares) at Jun. 30, 2018		5,727,500	2,508,797	1,758,030	92,532,749