UNIT-BASED COMPENSATION (Unit-based Compensation) (Details) (Long-term Incentive Plan, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Long-term Incentive Plan
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unit-based compensation $ 2,999 $ 269 $ 0