Consolidated Statements of Changes in Equity (USD $) In Thousands, unless otherwise specified	Total	$0.4875 per Series A preferred share	$0.50 per Series C depositary preferred share	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Accumulated Deficit $0.4875 per Series A preferred share	Accumulated Deficit $0.50 per Series C depositary preferred share	Noncontrolling Interests in Other Parnerhsips	Comprehensive Loss
Stockholders' Equity, beginning balance at Dec. 31, 2011	$ 586,895			$ 478,774	$ 1,243	$ 2,353,251	$ 25,738	$ (2,297,468)			$ 25,357
Shares, Issued - beginning balance at Dec. 31, 2011				12,948	124,281
Increase (Decrease) in Stockholders' Equity
Amortization of stock awards	232					232
Forfeiture of stock awards - shares					(63)
Forfeiture of stock awards - value	(7)				(1)	193		(199)
Conversion of operating partnership units into common shares - shares					0
Conversion of operating partnership units into common shares - value	1					1
Allocation to redeemable noncontrolling interests	(230)					(230)
Contribution from noncontrolling interests	291										291
Distribution to noncontrolling interests	(455)										(455)
Other	(4)					0		(4)
Preferred dividends:
Preferred dividends		(6,279)	(3,399)						(6,279)	(3,399)
Comprehensive Loss:
Foreign exchange translation							306					306
Net loss								(28,463)			(202)	(28,665)
Comprehensive loss	(28,359)											(28,359)
Stockholders' Equity, ending balance at Mar. 31, 2012	548,686			478,774	1,242	2,353,447	26,044	(2,335,812)			24,991
Shares, Issued - ending balance at Mar. 31, 2012				12,948	124,218
Stockholders' Equity, beginning balance at Dec. 31, 2012	422,019			478,774	1,241	2,353,581	26,039	(2,464,968)			27,352
Shares, Issued - beginning balance at Dec. 31, 2012				12,948	124,117
Increase (Decrease) in Stockholders' Equity
Issuance of stock awards - shares					5
Amortization of stock awards	671					671
Conversion of operating partnership units into common shares - value	0
Allocation to redeemable noncontrolling interests	(977)					(977)
Contribution from noncontrolling interests	602										602
Distribution to noncontrolling interests	(284)										(284)
Preferred dividends:
Preferred dividends		(6,279)	(3,399)						(6,279)	(3,399)
Comprehensive Loss:
Foreign exchange translation							(355)					(355)
Net loss								(26,185)			(240)	(26,425)
Comprehensive loss	(26,780)											(26,780)
Stockholders' Equity, ending balance at Mar. 31, 2013	$ 385,573			$ 478,774	$ 1,241	$ 2,353,275	$ 25,684	$ (2,500,831)			$ 27,430
Shares, Issued - ending balance at Mar. 31, 2013				12,948	124,122