CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Real Estate and Other Assets Held for Sale, Net of Accumulated Depreciation and Amortization	$ 3,050	$ 39,413
Leasing Intangibles Held for Sale, Net of Accumulated Amortization	$ 0	$ 415
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	150,000,000	150,000,000
Common Stock, shares issued	103,092,027	91,131,516
Common Stock, shares outstanding	98,767,913	86,807,402
Treasury Shares at cost, shares	4,324,114	4,324,114