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SHARE-BASED COMPENSATION - Additional Information (Details) - USD ($)
9 Months Ended
May 09, 2019
Apr. 04, 2019
Apr. 01, 2019
Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of options grated (in shares)       180,213
Number of options vested (in shares)       693,441
2019 LTIP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of REIT peer groups   14    
LTIP Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number or equity awards granted (in shares)       276,482
Number of awards vested (in shares)       80,681
LTIP Units | 2019 LTIP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance measurement period of equity awards   3 years    
LTIP Units | 2019 LTIP | Trustees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number or equity awards granted (in shares) 28,040      
Weighted average grant date fair value of awards granted during period (in dollars per share) $ 14.98      
Time-based LTIP Shares | 2019 LTIP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number or equity awards granted (in shares)   112,910    
Weighted percentage of equity awards   $ 0.3333    
Award vesting period   3 years    
Grant date fair value of equity awards   $ 2,000,000.0    
Time-based LTIP Shares | 2019 LTIP | CEO        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period   4 years    
Performance-based LTIP Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Equity awards percentage of relative component of TSR equal to 35 percentile of peer group   3500.00%    
Equity awards percentage of relative component of TSR equal to 55 percentile of peer group   5500.00%    
Equity awards percentage of relative component of TSR equal to 75 percentile of peer group   7500.00%    
Aggregate notional amount of grant     $ 4,300,000  
Performance-based LTIP Shares | 2019 LTIP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance measurement period of equity awards   3 years    
Weighted percentage of equity awards   $ 0.6666    
Number of equity awards issued (in shares)   489,319    
Equity awards earned percentage based on absolute TSR component of equal to 18%   40.00%    
Equity awards percentage of absolute component of TSR equal to 18%   18.00%    
Equity awards earned percentage based on absolute TSR component of equal to 27%   100.00%    
Equity awards percentage of absolute component of TSR equal to 27%   27.00%    
Equity awards earned percentage based on absolute TSR component of equal to 36%   165.00%    
Equity awards percentage of absolute component of TSR equal to 36%   36.00%    
Equity awards earned percentage based on relative TSR component of 35 percentile of peer group   40.00%    
Equity awards earned percentage based on relative TSR component of 55 percentile of peer group   100.00%    
Equity awards earned percentage based on relative TSR component of 75 percentile of peer group   165.00%    
Restricted Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number or equity awards granted (in shares)       34,638
Number of awards vested (in shares)       96,378
Deferred share units | 2019 LTIP | Trustees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number or equity awards granted (in shares) 5,608      
Weighted average grant date fair value of awards granted during period (in dollars per share) $ 15.60