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SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS Noncontrolling Interest (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | $ 447,459,000 |  |  |  |  | $ 447,459,000 |  |
Distributions declared | $ 0.23 | $ 0.21 | $ 0.21 | $ 0.21 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.86 | $ 0.72 | $ 0.72
Net income for the period January 1 through December 31, 2013 |  |  |  |  |  |  |  |  | (4,525,000) | (50,230,000) | (2,160,000)
Conversion of 92,514 OP Units to Common Shares by limited partners of the Operating Partnership |  |  |  |  |  |  |  |  |  | 0 | 0
Issuance of OP Units to acquire real estate |  |  |  |  |  |  |  |  | 33,300,000 | 2,279,000 | 0
Other comprehensive income - unrealized loss on valuation of swap agreements |  |  |  |  |  |  |  |  | 3,610,000 | (3,519,000) | (5,611,000)
Reclassification of realized interest on swap agreements |  |  |  |  |  |  |  |  | 2,892,000 | 2,268,000 | 3,081,000
Noncontrolling Interest contributions |  |  |  |  |  |  |  |  | 49,324,000 | 172,228,000 | 117,945,000
Noncontrolling interest distributions and other reductions |  |  |  |  |  |  |  |  | (87,688,000) | (160,663,000) | (7,697,000)
Employee Long-term Incentive Plan Unit Awards |  |  |  |  |  |  |  |  | 7,672,000 | 6,691,000 | 6,122,000
Balance | 417,352,000 |  |  |  | 447,459,000 |  |  |  | 417,352,000 | 447,459,000 |
Limited Partners' Capital Account, Units Issued and Converted | 92,514 |  |  |  |  |  |  |  | 92,514 |  |
Share-based Compensation, Units converted from Series A Preferred OP Units | 185,600 |  |  |  |  |  |  |  | 185,600 |  |
Denominator for Series A Preferred OP Unit Conversion | 7.50 |  |  |  |  |  |  |  | 7.50 |  |
LTIP Units [Member] |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation, Units Outstanding | 1,368,086 |  |  |  | 1,109,727 |  |  |  | 1,368,086 | 1,109,727 |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Per Unit Conversion Amount, Series A Preferred OP Units | 22.50 |  |  |  |  |  |  |  | 22.50 |  |
Per Unit Conversion Annual Rate, Series A Preferred OP Units | 9.00% |  |  |  |  |  |  |  | 9.00% |  |
Limited Partners' Capital Account, Units Issued and Converted | 1,392 |  |  |  |  |  |  |  | 1,392 |  |
Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Conversion of 92,514 OP Units to Common Shares by limited partners of the Operating Partnership |  |  |  |  |  |  |  |  | (1,548,000) | (5,880,000) | (56,000)
Issuance of OP Units to acquire real estate |  |  |  |  |  |  |  |  | 33,300,000 | 2,279,000 |
Other comprehensive income - unrealized loss on valuation of swap agreements |  |  |  |  |  |  |  |  | 69,000 | (1,704,000) | (2,150,000)
Reclassification of realized interest on swap agreements |  |  |  |  |  |  |  |  | 994,000 | 847,000 | 676,000
Noncontrolling Interest contributions |  |  |  |  |  |  |  |  | 49,324,000 | 172,228,000 | 117,945,000
Noncontrolling interest distributions and other reductions |  |  |  |  |  |  |  |  | (87,688,000) | (160,663,000) | (7,697,000)
Employee Long-term Incentive Plan Unit Awards |  |  |  |  |  |  |  |  | 6,530,000 | 6,025,000 | 5,991,000
Noncontrolling Interests | Partially-Owned Affiliates [Member] |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | 435,665,000 |  |  |  |  | 435,665,000 |  |
Distributions declared of $0.86 per Common OP Unit |  |  |  |  |  |  |  |  | 0 |  |
Net income for the period January 1 through December 31, 2013 |  |  |  |  |  |  |  |  | 4,033,000 |  |
Conversion of 92,514 OP Units to Common Shares by limited partners of the Operating Partnership |  |  |  |  |  |  |  |  | 0 |  |
Issuance of LTIP Unit awards to employees |  |  |  |  |  |  |  |  | (33,949,000) |  |
Issuance of OP Units to acquire real estate |  |  |  |  |  |  |  |  | 0 |  |
Other comprehensive income - unrealized loss on valuation of swap agreements |  |  |  |  |  |  |  |  | 46,000 |  |
Reclassification of realized interest on swap agreements |  |  |  |  |  |  |  |  | 973,000 |  |
Noncontrolling Interest contributions |  |  |  |  |  |  |  |  | 49,324,000 |  |
Noncontrolling interest distributions and other reductions |  |  |  |  |  |  |  |  | (87,688,000) |  |
Employee Long-term Incentive Plan Unit Awards |  |  |  |  |  |  |  |  | 0 |  |
Balance | 368,404,000 |  |  |  |  |  |  |  | 368,404,000 |  |
Operating Partnership, as General Partner or Managing Member [Member] |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Series A Preferred OP Units | 1,457,467 |  |  |  | 284,097 |  |  |  | 1,457,467 | 284,097 |
Operating Partnership, as General Partner or Managing Member [Member] | Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Series A Preferred OP Units | 188 |  |  |  | 188 |  |  |  | 188 | 188 |
Limited Partners' Capital Account, Value Per Unit | 1,000 |  |  |  | 1,000 |  |  |  | 1,000 | 1,000 |
Operating Partnership, as General Partner or Managing Member [Member] | Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | 11,794,000 |  |  |  |  | 11,794,000 |  |
Distributions declared of $0.86 per Common OP Unit |  |  |  |  |  |  |  |  | (1,664,000) |  |
Net income for the period January 1 through December 31, 2013 |  |  |  |  |  |  |  |  | 492,000 |  |
Conversion of 92,514 OP Units to Common Shares by limited partners of the Operating Partnership |  |  |  |  |  |  |  |  | (1,548,000) |  |
Issuance of LTIP Unit awards to employees |  |  |  |  |  |  |  |  | 0 |  |
Issuance of OP Units to acquire real estate |  |  |  |  |  |  |  |  | 33,300,000 |  |
Other comprehensive income - unrealized loss on valuation of swap agreements |  |  |  |  |  |  |  |  | 23,000 |  |
Reclassification of realized interest on swap agreements |  |  |  |  |  |  |  |  | 21,000 |  |
Noncontrolling Interest contributions |  |  |  |  |  |  |  |  | 0 |  |
Noncontrolling interest distributions and other reductions |  |  |  |  |  |  |  |  | 0 |  |
Employee Long-term Incentive Plan Unit Awards |  |  |  |  |  |  |  |  | 6,530,000 |  |
Balance | $ 48,948,000 |  |  |  |  |  |  |  | $ 48,948,000 |  |

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