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SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) (USD $) | 6 Months Ended | 1 Months Ended | 6 Months Ended |  |  |  |  | 6 Months Ended |  |  | 1 Months Ended
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Jun. 30, 2012 | Jun. 30, 2011 | Jul. 31, 2012 At The Market Equity Program | Jun. 30, 2012 At The Market Equity Program | Jun. 30, 2012 At The Market Equity Program | Jun. 30, 2012 Operating Partnership, as General Partner or Managing Member | Dec. 31, 2011 Operating Partnership, as General Partner or Managing Member | Jun. 30, 2012 Series A Preferred Stock Operating Partnership, as General Partner or Managing Member | Dec. 31, 2011 Series A Preferred Stock Operating Partnership, as General Partner or Managing Member | Jun. 30, 2012 Common stock At The Market Equity Program | Jun. 30, 2012 LTIP Units | Dec. 31, 2011 LTIP Units | Jan. 31, 2012 Maximum Common stock
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Reserved for Future Issuance, Value, At The Market Equity Program |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,000,000
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  |  |  |  |  |  | 2,900,000 |  |  |
Gross Proceeds from Issuance of Common Stock |  |  |  |  | 65,700,000 |  |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock | $ 60,717,000 | $ 0 | $ 3,600,000 | $ 61,000,000 | $ 64,600,000 |  |  |  |  |  |  |  |
Limited Partners' Capital Account, Units Outstanding (in shares) |  |  |  |  |  | 384,376 | 279,748 | 188 | 188 |  |  |  |
Share-based Compensation, Units Outstanding (in shares) |  |  |  |  |  |  |  |  |  |  | 237,000 | 217,826 |

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