Annual report pursuant to Section 13 and 15(d)

EQUITY-BASED AWARDS - Narrative (Details)

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EQUITY-BASED AWARDS - Narrative (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended 36 Months Ended
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
LTIP units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Aggregate fair value of LTIP units vested during period $ 1.1 $ 2.7 $ 1.5    
Total compensation cost recognized $ 1.1 3.0 $ 1.5    
Unvested compensation cost not yet recognized   $ 2.3     $ 2.3
Recognition period on unvested shares   2 years      
2013 Long-Term Incentive Plan [Member] | LTIP units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares authorized under 2013 equity incentive plan (in shares)   2,500,000     2,500,000
Total shares issued (in shares)         2,474,710
Granted (in shares) 406,600 6,000 378,550    
LP Agreement [Member] | LTIP units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total shares issued (in shares)         310,051
2015 Plan [Member] | Restricted Common Shares [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognition period on unvested shares   2 years      
Percent of shares outstanding issuable   5.00%      
Restricted common shares granted (in shares)   17,210      
Vesting period for restricted common shares   2 years 6 months      
Aggregate fair value and total compensation cost of vested shares   $ 0.1      
Compensation cost not yet recognized on unvested restricted common shares   0.1     $ 0.1
Participating Regional Operator [Member] | Management [Member] | 2013 Long-Term Incentive Plan [Member] | LTIP units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Aggregate fair value of LTIP units vested during period $ 2.9 $ 1.4 $ 3.7    
Granted (in shares)       1,683,560  
Acquisition Consultants [Member] | LP Agreement [Member] | LTIP units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock Issued During Period, Shares, Issued for Services   88,981 221,070    
Stock Issued During Period, Value, Issued for Services   $ 1.0 $ 2.1