Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands	Total	$1.4625 per Series A preferred share	Series C Preferred Stock [Member]	Dividend per common stock	Preferred Stock	Preferred Stock Series C Preferred Stock [Member]	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Series C Preferred Stock [Member]	Accumulated Other Comprehensive Income	Accumulated Deficit	Accumulated Deficit $1.4625 per Series A preferred share	Accumulated Deficit Series C Preferred Stock [Member]	Accumulated Deficit Dividend per common stock	Noncontrolling Interests in Other Partnerships	Preferred Equity in Consolidated Joint Venture	Comprehensive Income (Loss)
Shares, Issued - beginning balance at Dec. 31, 2013					12,948		124,051
Stockholders' Equity, beginning balance at Dec. 31, 2013	$ 314,230				$ 478,774		$ 1,240	$ 2,354,328		$ 24,937	$ (2,568,350)				$ 23,301	$ 0
Increase (Decrease) in Stockholders' Equity
Conversion of preferred stock into common stock	0				$ (8)			8
Issuance of stock awards - shares							349
Issuance of stock awards - value	0						$ 4	(4)
Stock awards - amortization	3,066							3,066
Redemption of preferred stock	0
Forfeiture of stock awards - shares							(117)
Forfeiture of stock awards - value	(932)						$ (1)	0			(931)
Conversion of operating partnership units into common shares - shares							6
Conversion of operating partnership units into common shares, Value	56							56
Allocation to redeemable noncontrolling interests	(642)							(642)
Contribution from noncontrolling interests	5,508														5,508
Distribution to noncontrolling interests	(8,634)														(8,634)
Acquisition of noncontrolling interests	(5,850)							(3,508)							(2,342)
Dividends, Common Stock				$ (7,556)										$ (7,556)
Preferred dividends	(870)	$ (18,837)	$ (10,197)									$ (18,837)	$ (10,197)			(870)
Issuance of preferred equity - consolidated joint venture	41,443															41,443
Foreign exchange translation										(489)							$ (489)
Reclassification of foreign currency translation to gain										(24,448)							(24,448)
Net income (loss)											81,854				830	870	83,554
Comprehensive Income (Loss)	58,617																58,617
Shares, Issued - ending balance at Sep. 30, 2014					12,948		124,289
Stockholders' Equity, ending balance at Sep. 30, 2014	369,402				$ 478,766		$ 1,243	2,353,304		0	(2,524,017)				18,663	41,443
Shares, Issued - beginning balance at Dec. 31, 2014					12,947		124,605
Stockholders' Equity, beginning balance at Dec. 31, 2014	362,867				$ 478,749		$ 1,246	2,353,666		0	(2,530,671)				18,435	41,442
Increase (Decrease) in Stockholders' Equity
Issuance of common stock - shares							18,400
Issuance of common stock	198,651						$ 184	198,467
Issuance of stock awards - shares							379
Issuance of stock awards - value	694						$ 4	690
Stock awards - amortization and severance	5,702							5,702
Redemption of Preferred Stock, Shares						(68)
Redemption of preferred stock	(6,096)		(169,986)			$ (169,412)			$ 5,522				(6,096)
Forfeiture of stock awards - shares							(2)
Forfeiture of stock awards - value	(8)						$ 0	0			(8)
Conversion of operating partnership units into common shares, Value	0
Allocation to redeemable noncontrolling interests	2,076							2,076
Contribution from noncontrolling interests	2,544														2,544
Distribution to noncontrolling interests	(16,294)														(16,294)
Dividends, Common Stock				$ (17,382)										$ (17,382)
Preferred dividends	(1,070)	$ (18,837)	$ (5,023)								0	$ (18,837)	$ (5,023)			(1,070)
Issuance of preferred equity - consolidated joint venture	1,744															1,744
Net income (loss)											(4,709)				4,405	1,070	766
Comprehensive Income (Loss)	766																$ 766
Shares, Issued - ending balance at Sep. 30, 2015					12,879		143,382
Stockholders' Equity, ending balance at Sep. 30, 2015	$ 346,444				$ 309,337		$ 1,434	$ 2,566,123		$ 0	$ (2,582,726)				$ 9,090	$ 43,186