CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	$ 7,737	$ 3,050
Leasing Intangibles Held for Sale Accumulated Amortization	$ 507	$ 0
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	150,000,000	150,000,000
Common Stock, shares issued	111,810,021	103,092,027
Common Stock, shares outstanding	107,485,907	98,767,913
Treasury Shares at Cost, shares	4,324,114	4,324,114