Annual report pursuant to Section 13 and 15(d)

EQUITY-BASED AWARDS - Acquisition Related LTIP Units (Details)

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EQUITY-BASED AWARDS - Acquisition Related LTIP Units (Details) - LTIP units - 2013 Plan - PRO - shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of LTIP units      
Unvested units at beginning of year (in shares) 224,000 224,000 260,400
Vested (in shares) 0 0 (36,400)
Unvested units at end of year (in shares) 224,000 224,000 224,000