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SEGMENT REPORTING Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Real Estate at Cost | $ 1,819,053 | $ 1,287,198 | $ 897,370
Total Assets | 2,244,523 | 1,670,163 | 1,077,694
Acquisition of Real Estate | 220,041 | 241,894 | 116,408
Investment in Redevelopment and Improvements | 106,883 | 82,127 | 61,311
Core Portfolio [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Real Estate at Cost | 1,059,257 | 722,345 | 475,685
Total Assets | 1,012,553 | 727,423 | 487,469
Acquisition of Real Estate | 143,616 | 175,556 | 56,103
Investment in Redevelopment and Improvements | 10,611 | 3,862 | 12,266
Opportunity Funds [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Real Estate at Cost | 759,796 | 564,853 | 421,685
Total Assets | 1,105,264 | 811,855 | 530,236
Acquisition of Real Estate | 76,425 | 66,338 | 60,305
Investment in Redevelopment and Improvements | 96,272 | 78,265 | 49,045
Notes Receivable [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Real Estate at Cost | 0 | 0 | 0
Total Assets | 126,706 | 130,885 | 59,989
Acquisition of Real Estate | 0 | 0 | 0
Investment in Redevelopment and Improvements | $ 0 | $ 0 | $ 0

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