Annual report pursuant to Section 13 and 15(d)

EQUITY-BASED AWARDS - Performance-Based LTIP Units Activity (Details)

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EQUITY-BASED AWARDS - Performance-Based LTIP Units Activity (Details) - Performance-Based LTIP Units - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Weighted Average Grant-Date Fair Value      
Unvested at beginning of year (in dollars per share) $ 26.35 $ 27.63 $ 0
Granted (in dollars per share) 29.76 24.67 27.63
Unvested at end of year (in dollars per share) $ 27.71 $ 26.35 $ 27.63
Minimum      
Number of LTIP units      
Unvested units at beginning of year (in shares) 0 0 0
Granted (in shares) 0 0 0
Unvested units at end of year (in shares) 0 0 0
Target      
Number of LTIP units      
Unvested units at beginning of year (in shares) 86,407 40,390 0
Granted (in shares) 53,128 46,017 40,390
Unvested units at end of year (in shares) 139,535 86,407 40,390
Maximum      
Number of LTIP units      
Unvested units at beginning of year (in shares) 159,899 90,874 0
Granted (in shares) 106,252 69,025 90,874
Unvested units at end of year (in shares) 266,151 159,899 90,874