Annual report pursuant to Section 13 and 15(d)

EQUITY-BASED AWARDS - Narrative (Details)

v3.8.0.1
EQUITY-BASED AWARDS - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended 36 Months Ended 60 Months Ended
Dec. 31, 2013
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2017
Dec. 31, 2017
2015 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of shares outstanding issuable   5.00%        
LTIP units [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total compensation cost recognized   $ 3.5 $ 2.5 $ 3.0    
Unvested compensation cost not yet recognized   $ 3.4     $ 3.4 $ 3.4
Recognition period on unvested shares   2 years        
LTIP units [Member] | 2013 Long-Term Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Maximum number of shares authorized under under plan (in shares)   2,500,000     2,500,000 2,500,000
Total shares issued (in shares)           2,474,710
LTIP units [Member] | LP Agreement [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total shares issued (in shares)           313,585
LTIP units [Member] | 2015 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total shares issued (in shares)           396,471
Time-Based LTIP Unit [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Aggregate fair value of LTIP units vested during period   $ 2.6 $ 1.2 $ 2.7    
Granted (in shares)   128,051 177,546 6,000    
Time-Based LTIP Unit [Member] | Minimum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period (in years)   1 year        
Time-Based LTIP Unit [Member] | Maximum [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period (in years)   3 years        
Restricted Common Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total compensation cost recognized   $ 0.2 $ 0.1 $ 0.1    
Restricted Common Shares [Member] | 2015 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period (in years)         3 years  
Unvested compensation cost not yet recognized   $ 0.3     $ 0.3 $ 0.3
Recognition period on unvested shares   2 years        
Restricted common shares granted (in shares)   16,525 8,090 17,210 41,825  
Aggregate fair value and total compensation cost of vested shares   $ 0.1 $ 0.1 $ 0.1    
Participating Regional Operator [Member] | Management [Member] | LTIP units [Member] | 2013 Long-Term Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Aggregate fair value of LTIP units vested during period   $ 0.9 $ 0.8 $ 1.4    
Granted (in shares) 1,683,560          
Acquisition Consultants [Member] | LTIP units [Member] | LP Agreement [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares issued for services (in shares)   776 2,758 88,981    
Shares issued for services (fair value)   $ 0.1 $ 0.1 $ 1.0