CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS EQUITY (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Distributions in Excess of Accumulated Earnings	Accumulated Other Comprehensive Loss	Treasury Shares at Cost	Noncontrolling Interest
Balance at Dec. 31, 2012	$ 1,145,653	$ 0	$ 1,031	$ 1,906,490	$ (657,567)	$ (6,557)	$ (140,018)	$ 42,274
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock, Net of Issuance Costs	132,050		84	131,966
Stock Based Compensation Activity	712		3	1,179	(470)
Reallocation-Additional Paid in Capital				(2,268)				2,268
Distributions	(9,536)				(9,136)			(400)
Preferred Dividends	(3,837)				(3,837)
Net Loss	(1,123)				(903)			(220)
Reallocation-Other Comprehensive Income								22
Reallocation-Other Comprehensive Income						(22)		22
Other Comprehensive Income	770					736		34
Balance at Mar. 31, 2013	$ 1,264,689	$ 0	$ 1,118	$ 2,037,367	$ (671,913)	$ (5,843)	$ (140,018)	$ 43,978