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Equity-Based Compensation (Details) (WNRL 2013 LTIP [Member], USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Common Stock, Capital Shares Reserved for Future Issuance 4,207,195 4,207,195
Phantom Share Units (PSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense $ 0.5 $ 1.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Total Weighted Average Grant Date Fair Value 8.0 8.0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 6.7 $ 6.7
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   4 years 3 months 25 days