RELATED PARTY TRANSACTIONS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Blackstone and First Reserve [Member] | Series B Units [Member]
Related Party Transaction [Line Items]
Distributions to Series B Unitholders	$ 19,592,000	$ 130,523,000	$ 6,427,000	$ 0
Fuel Strategies International, Inc, [Member]
Related Party Transaction [Line Items]
Charges incurred during period	0	588,000	646,000
Executive Chairman of the Board of Directors [Member]
Related Party Transaction [Line Items]
Charges incurred during period	$ 957,000	$ 1,214,000	$ 1,274,000