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ACQUISITIONS - Unaudited Pro Forma Information (Details) - The Partnership (acquiree) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Acquisitions    
Pro forma operating revenues $ 90,453 $ 149,949
Pro forma net income (loss) (228,401) 18,082
Pro forma net income (loss) attributable to limited partners $ (220,273) $ 17,438
Pro forma net income (loss) per limited partner common and subordinated units - basic and diluted $ (10.85) $ 0.86