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LONG-TERM INCENTIVE COMPENSATION (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 12 Months Ended | 0 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Feb. 28, 2014 Officer | Dec. 31, 2009 Senior Executives Long Term Investment Alignment Program | Dec. 31, 2009 Senior Executives Long Term Investment Alignment Program Fund IV | Feb. 28, 2014 LTIP Units Officer | Mar. 31, 2014 LTIP Units Kenneth Bernstein | Jun. 04, 2014 LTIP Units Trustee Vesting on first anniversary | Feb. 28, 2014 Restricted Stock Officer | Feb. 28, 2014 Restricted Stock Other Employees | Jun. 04, 2014 Restricted Stock Trustee | Jun. 04, 2014 Restricted Stock Trustee Vesting on first anniversary | Jun. 04, 2014 Restricted Stock Trustee Vesting over each of next three years | Sep. 30, 2014 LTIP Units and Restricted Stock | Mar. 31, 2014 LTIP Units and Restricted Stock | Sep. 30, 2013 LTIP Units and Restricted Stock | Sep. 30, 2014 LTIP Units and Restricted Stock | Sep. 30, 2013 LTIP Units and Restricted Stock | Dec. 31, 2013 LTIP Units and Restricted Stock | Sep. 30, 2014 LTIP Units and Restricted Stock Trustee | Sep. 30, 2014 LTIP Units and Restricted Stock Trustee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, shares, share-based compensation, net of forfeitures (in shares) |  |  |  |  |  |  |  | 326,230 | 114,198 | 1,518 | 918 | 10,527 | 17,118 | 6,276 | 10,842 |  |  |  |  |  |  |  |
Percent of awards issued to officers subject to performance measures |  |  |  |  | 16.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting period |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Stock granted during period, value, share-based compensation, net of forfeitures |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,900,000 |  | $ 11,400,000 |  |  |  |
Long term incentive and share based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,600,000 |  | 1,300,000 | 4,600,000 | 3,800,000 | 500,000 |  |
Share-based compensation expense |  |  | 5,542,000 | 4,590,000 |  |  |  |  |  |  |  |  |  |  |  | 600,000 |  |  | 1,600,000 |  |  |  |
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% |  |  |  |  |  |  |  |  |  |
Trustee fee expense | $ 200,000 | $ 100,000 | $ 600,000 | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 80,000 | $ 120,000
Maximum percentage of promote to be awarded as share based compensation awards |  |  |  |  |  | 25.00% | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Maximum Percentage of Promote To Be Awarded as Share Based Compensation Awards. Promote is defined as the amount above a certain performance measurement threshold. + References No definition available. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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