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TRANSACTIONS WITH RELATED PARTIES - Cash Distributions (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 14, 2016
Aug. 12, 2016
May 13, 2016
Feb. 19, 2016
Nov. 13, 2015
Aug. 14, 2015
May 15, 2015
Feb. 13, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Related Party Transaction [Line Items]                      
Payments of capital distribution                 $ 29,665 $ 24,032 $ 107,828
USDG                      
Related Party Transaction [Line Items]                      
Amount Paid to USDG $ 3,727 $ 3,640 $ 3,554 $ 3,467 $ 3,381 $ 3,352 $ 3,322 $ 2,817 14,388 12,872  
USD Group LLC                      
Related Party Transaction [Line Items]                      
Amount Paid to USD Partners GP LLC $ 149 $ 145 $ 142 $ 138 $ 125 $ 124 $ 123 $ 102 $ 574 $ 474