Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Operating Real Estate From Consolidated Variable Interest Entities	$ 264,821	$ 264,821	$ 264,506
Accumulated depreciation and amortization, consolidated variable interest entities	15,579	15,579	12,024
Accumulated Amortization, Deferred Finance Costs	10,488	10,488	10,140
Mortgage Payable From Consolidated Variable Interest Entities	$ 204,055	$ 204,055	$ 205,299
Preferred Stock, Shares Authorized	15,000,000	15,000,000	15,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01
Preferred Stock, Liquidation Preference Per Share	$ 25	$ 25	$ 25
Preferred Stock, Shares Issued	399,896	399,896	399,896
Preferred Stock, Shares Outstanding	399,896	399,896	399,896
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01
Common Stock, Shares Authorized	100,000,000	100,000,000	100,000,000
Common Stock, Shares, Issued	65,687,234	65,687,234	64,815,446
Common Stock, Shares, Outstanding	65,687,234	65,687,234	64,815,446
5.417% Series 1 Cumulative Convertible Preferred [Member]
Preferred Stock, Dividend Rate, Percentage	5.417%	5.417%	5.417%