Consolidated Statement of Changes in Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Restricted Stock and Restricted Stock Units (RSUs) [Member]	Series A Preferred Stock [Member]	Series D Preferred Stock [Member]	Series E Preferred Stock [Member]	Common Stock	Preferred Stock Series A Preferred Stock [Member]	Preferred Stock Series D Preferred Stock [Member]	Preferred Stock Series E Preferred Stock [Member]	Common Stock	Additional Paid In Capital	Additional Paid In Capital Restricted Stock and Restricted Stock Units (RSUs) [Member]	Accumulated Deficit	Accumulated Deficit Series A Preferred Stock [Member]	Accumulated Deficit Series D Preferred Stock [Member]	Accumulated Deficit Series E Preferred Stock [Member]	Accumulated Deficit Common Stock	Accumulated Other Comprehensive Loss	Treasury Stock	Treasury Stock Restricted Stock and Restricted Stock Units (RSUs) [Member]	Noncontrolling Interests In Consolidated Entities	Noncontrolling Interests in Operating Partnership	Noncontrolling Interests in Operating Partnership Restricted Stock and Restricted Stock Units (RSUs) [Member]
Beginning balance, value at Dec. 31, 2013	$ 618,837						$ 17	$ 95	$ 46	$ 1,249	$ 1,652,743		$ (896,110)					$ (197)	$ (140,054)		$ 1,048	$ 134,206
Beginning balance, shares (in shares) at Dec. 31, 2013							1,657,000	9,469,000	4,630,000	124,897,000									44,331,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchases of treasury shares	(458)																		(458)
Purchases of treasury shares (in shares)																			(41,000)
Equity-based compensation	2,413										2,413											14,551
Forfeitures of restricted shares	(12)										32								(20)
Forfeitures of restricted shares (in shares)																			(8,000)
Issuances of stock		0										(993)								993			50
Issuances of stock (in shares)																				423,000
Reissuance of treasury shares	85,840										72,243									13,597
Reissuance of treasury shares (in shares)																				8,350,000
Dividends			(2,657)	(15,001)	(7,813)	(31,161)				(30,930)				(2,657)	(15,001)	(7,813)	(31,161)
Reclassification to interest expense	87																	87				13
Distributions to noncontrolling interests	(255)																				(255)	(8,050)
Sale of consolidated noncontrolling interest	1,200										640										560
Redemption/conversion of operating partnership units	1,415										1,574		(401)							242		(1,415)
Redemption/conversion of operating partnership units (in shares)																				160,000
Redemption value adjustment	(42,350)												(42,350)									42,350
Unvested operating partnership units reclassified to equity	(272)										(272)											272
Deferred compensation to be settled in shares	391										958		(567)
Net loss attributable to the Company	(17,469)												(17,469)
Net loss	(17,615)																				(146)
Net loss attributable to noncontrolling interest in operating partnership units																						(4,234)
Ending balance, value at Sep. 30, 2014	592,613						17	95	46	1,249	1,729,338		(1,013,529)					(110)	(125,700)		1,207	177,743
Ending balance, shares (in shares) at Sep. 30, 2014							1,657,000	9,469,000	4,630,000	124,897,000									35,447,000
Beginning balance, value at Jun. 30, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends										(10,661)
Net loss attributable to the Company	(13,495)
Net loss attributable to noncontrolling interest in operating partnership units	(2,585)
Ending balance, value at Sep. 30, 2014	$ 592,613						$ 17	$ 95	$ 46	$ 1,249
Ending balance, shares (in shares) at Sep. 30, 2014							1,657,000	9,469,000	4,630,000	124,897,000