Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified	Total	$1.4625 per Series A preferred share	$1.50 per Series C depositary preferred share	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Accumulated Deficit $1.4625 per Series A preferred share	Accumulated Deficit $1.50 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					95
Issuance of stock awards - value	555				1	554
Amortization of stock awards	2,407					2,407
Forfeiture of stock awards - shares					(12)
Forfeiture of stock awards - value	(86)							(86)
Conversion of operating partnership units into common shares - shares					15
Conversion of operating partnership units into common shares - value	97					97
Allocation to redeemable noncontrolling interests	970					970
Contribution from noncontrolling interests	6,646											6,646
Distribution to noncontrolling interests	(868)											(868)
Other	(70)					(68)		(2)
Preferred dividends:
Preferred dividends		(18,837)	(10,197)						(18,837)	(10,197)
Comprehensive Loss:
Foreign exchange translation							(2,043)						(2,043)
Net loss								(96,761)				(269)	(97,030)
Comprehensive loss	(99,073)												(99,073)
Stockholders' Equity, ending balance at Sep. 30, 2011	628,398			478,774	1,246	2,352,468	24,414	(2,253,808)			0	25,304
Shares, Issued - ending balance at Sep. 30, 2011				12,948	124,580
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	630					630
Forfeiture of stock awards - shares					(63)
Forfeiture of stock awards - value	(7)				(1)	193		(199)
Conversion of operating partnership units into common shares - shares					11
Conversion of operating partnership units into common shares - value	45					45
Allocation to redeemable noncontrolling interests	(581)					(581)
Contribution from noncontrolling interests	2,756											2,756
Distribution to noncontrolling interests	(931)											(931)
Other	(4)							(4)
Preferred dividends:
Preferred dividends		(18,837)	(10,197)						(18,837)	(10,197)
Comprehensive Loss:
Foreign exchange translation							490						490
Net loss								(35,619)				(440)	(36,059)
Comprehensive loss	(35,569)												(35,569)
Stockholders' Equity, ending balance at Sep. 30, 2012	$ 524,200			$ 478,774	$ 1,242	$ 2,353,538	$ 26,228	$ (2,362,324)			$ 0	$ 26,742
Shares, Issued - ending balance at Sep. 30, 2012				12,948	124,229