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Equity-Based Compensation (Details) (WNRL 2013 LTIP [Member], USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Common Stock, Capital Shares Reserved for Future Issuance 4,251,947 4,251,947
Phantom Share Units (PSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense $ 0.4 $ 0.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Total Weighted Average Grant Date Fair Value 7.0 7.0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 6.3 $ 6.3
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   4 years 8 months 12 days