Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified	Total	$0.975 per Series A preferred share	$1.00 per Series C depositary preferred share	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Accumulated Deficit $0.975 per Series A preferred share	Accumulated Deficit $1.00 per Series C depositary preferred share	Treasury Stock	Noncontrolling Interests in Other Parnerhsips	Comprehensive Loss
Stockholders' Equity, beginning balance at Dec. 31, 2010	$ 588,378			$ 478,774	$ 1,010	$ 2,190,308	$ 26,457	$ (2,054,625)			$ (73,341)	$ 19,795
Shares, Issued - beginning balance at Dec. 31, 2010				12,948	101,038
Increase (Decrease) in Stockholders' Equity
Issuance of common stock - shares					27,600
Issuance of common stock - value	158,476				276	158,200
Retirement of treasury stock - shares					(4,156)
Retirement of treasury shares - value	0				(41)			(73,300)			73,341
Issuance of stock awards - shares					86
Issuance of stock awards - value	500				1	499
Amortization of stock awards	1,626					1,626
Forfeiture of stock awards - shares					(10)
Forfeiture of stock awards - value	(78)							(78)
Conversion of operating partnership units into common shares - shares					11
Conversion of operating partnership units into common shares - value	79					79
Allocation to redeemable noncontrolling interests	239					239
Contribution from noncontrolling interests	796											796
Distribution to noncontrolling interests	(670)											(670)
Other	(70)					(68)		(2)
Preferred dividends:
Preferred dividends		(12,558)	(6,798)						(12,558)	(6,798)
Comprehensive Loss:
Foreign exchange translation							1,474						1,474
Net loss								(73,929)				109	(73,820)
Comprehensive loss	(72,346)												(72,346)
Stockholders' Equity, ending balance at Jun. 30, 2011	657,574			478,774	1,246	2,350,883	27,931	(2,221,290)			0	20,030
Shares, Issued - ending balance at Jun. 30, 2011				12,948	124,569
Stockholders' Equity, beginning balance at Dec. 31, 2011	586,895			478,774	1,243	2,353,251	25,738	(2,297,468)			0	25,357
Shares, Issued - beginning balance at Dec. 31, 2011				12,948	124,281
Increase (Decrease) in Stockholders' Equity
Amortization of stock awards	432					432
Forfeiture of stock awards - shares					(63)
Forfeiture of stock awards - value	(7)				(1)	193		(199)
Conversion of operating partnership units into common shares - shares					9
Conversion of operating partnership units into common shares - value	33					33
Allocation to redeemable noncontrolling interests	(512)					(512)
Contribution from noncontrolling interests	2,310											2,310
Distribution to noncontrolling interests	(620)											(620)
Other	(4)							(4)
Preferred dividends:
Preferred dividends		(12,558)	(6,798)						(12,558)	(6,798)
Comprehensive Loss:
Foreign exchange translation							(9)						(9)
Net loss								(16,594)				(54)	(16,648)
Comprehensive loss	(16,657)												(16,657)
Stockholders' Equity, ending balance at Jun. 30, 2012	$ 552,514			$ 478,774	$ 1,242	$ 2,353,397	$ 25,729	$ (2,333,621)			$ 0	$ 26,993
Shares, Issued - ending balance at Jun. 30, 2012				12,948	124,227