Debt (Details) (Revolving Credit Facility [Member], USD $)	0 Months Ended
	Oct. 16, 2013	Jun. 30, 2014
Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 300,000,000
Line of Credit Facility, Expiration Date	Oct. 16, 2018
Line of Credit Facility, Difference Between Current Borrowing Capacity and Maximum Borrowing Capacity	200,000,000
Line of Credit Facility, Maximum Borrowing Capacity	500,000,000
Debt Instrument, Description of Variable Rate Basis	LIBOR
Line of Credit Facility, Amount Outstanding		0
Standby Letters of Credit [Member]
Line of Credit Facility [Line Items]
Sublimit, Revolving Credit Facility	25,000,000
Line of Credit Facility, Amount Outstanding		0
Loans [Member]
Line of Credit Facility [Line Items]
Sublimit, Revolving Credit Facility	10,000,000
Line of Credit Facility, Amount Outstanding		$ 0
Minimum [Member] | Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.75%
Debt Instrument, Basis Spread on Variable Rate	1.75%
Maximum [Member] | Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.75%
Debt Instrument, Basis Spread on Variable Rate	2.75%