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EQUITY-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of awards granted during the period
The following table summarizes awards granted during the year ended December 31, 2015. 
 
Total
Units
 
Phantom
Units
 
Restricted
Units
 
Fair Value per Unit
at Award Date
 
Outstanding at December 31, 2014
605,664

 
602,836

 
2,828

 
$
18.12

 
Granted
59,771

 
49,284

 
10,487

 
35.69

 
Vested
(401,011
)
 
(397,941
)
 
(3,070
)
 
17.5

 
Forfeitures
(39,424
)
 
(37,375
)
 
(2,049
)
 
33.33

 
Outstanding at December 31, 2015
225,000

 
216,804

 
8,196

 
$
21.22