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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

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