Consolidated Statement of Changes in Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income/(Loss)	Treasury Stock	Noncontrolling Interests in Consolidated Joint Ventures	Redeemable Noncontrolling Interests in Operating Partnership	Series A Cumulative Preferred Stock	Series A Cumulative Preferred Stock Preferred Stock	Series A Cumulative Preferred Stock Accumulated Deficit	Series B-1 Preferred Shares	Series B-1 Preferred Shares Common Stock	Series B-1 Preferred Shares Additional Paid-in Capital	Series B-1 Preferred Shares Accumulated Deficit	Series D Cumulative Preferred Stock	Series D Cumulative Preferred Stock Preferred Stock	Series D Cumulative Preferred Stock Accumulated Deficit	Series E Cumulative Preferred Stock	Series E Cumulative Preferred Stock Preferred Stock	Series E Cumulative Preferred Stock Accumulated Deficit
Beginning balance at Dec. 31, 2010	$ 833,518	$ 1,234	$ 1,552,657	$ (543,788)	$ (550)	$ (192,850)	$ 16,710	$ 126,722		$ 15							$ 90			$ 0
Beginning balance, shares at Dec. 31, 2010		123,404				(64,404)				1,488							8,967			0
Reissuance of treasury shares	85,969		58,700			27,269
Reissuance of treasury shares, shares						7,300
Issuance of Series E preferred stock	80,832		80,798																	34
Issuance of Series E preferred stock, shares																				3,350
Conversion of Series B-1 preferred stock													14	17,349	(17,363)
Conversion of Series B-1 preferred stock, shares													1,393
Forfeiture of restricted shares	(327)		10			(337)
Forfeiture of restricted shares, shares						(33)
Issuance of restricted shares/units under equity-based compensation			(1,169)			1,169		111
Issuance of restricted shares/units under equity-based compensation, shares						275
Equity-based compensation expense	2,512		2,512					5,920
Net income (loss)	12,305			12,305			537	(1,207)
Net income	12,842
Shareholder short swing profit payments	859		859
Dividends declared - Common shares	(18,848)			(18,848)
Dividends declared - Preferred shares									(2,385)		(2,385)	(1,374)			(1,374)	(14,205)		(14,205)	(3,414)		(3,414)
Unrealized loss on derivatives	(14)				(14)			(2)
Reclassification to interest expense	499				391		108	54
Distributions to noncontrolling interests	(3,000)						(3,000)	(5,788)
Redemption/conversion of operating partnership units	965	1	1,030	(66)				(965)
Redemption/conversion of operating partnership units, shares		100
Operating partnership units redemption value adjustments	17,208			17,208				(17,208)
Ending balance at Sep. 30, 2011	$ 991,637	$ 1,249	$ 1,712,746	$ (571,930)	$ (173)	$ (164,749)	$ 14,355	$ 107,637		$ 15							$ 90			$ 34
Ending balance, shares at Sep. 30, 2011		124,897				(56,862)				1,488							8,967			3,350