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Earning Per Share (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Earnings Per Share [Abstract] |  |  |  |
Weighted average nonvested restricted shares outstanding | 3,100,000 |  | 3,100,000 |
Weighted average number of OP units outstanding | 462,000 | 1,415,000 | 637,000 | 1,415,000
Warrants oustanding to purchase OP units | 83,000 |  | 83,000 |

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