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Organization and Basis of Presentation (Details)
3 Months Ended 3 Months Ended
Mar. 31, 2014
item
Dec. 31, 2013
Mar. 31, 2014
Affiliates of general partner
Feb. 28, 2013
Basin Transload LLC
Feb. 01, 2013
Basin Transload LLC
Feb. 15, 2013
Cascade Kelly
Organization            
Number of owned, leased and/or supplied gasoline stations 900          
Percentage of outstanding membership interests acquired       60.00% 60.00% 100.00%
General partner interest (as a percent) 0.83%          
Number of common units held 27,260,747 27,260,747 11,559,252      
Limited partner ownership interest (as a percent)     42.10%