Debt (Details) (Revolving Credit Facility [Member], USD $)	0 Months Ended
	Oct. 16, 2013	Sep. 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
Line of Credit Facility, Amount Outstanding		0
Standby Letters of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	25,000,000
Line of Credit Facility, Amount Outstanding		0
Loans [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	10,000,000
Line of Credit Facility, Amount Outstanding		$ 0
Base Rate [Member] | Minimum [Member] | Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.75%
Base Rate [Member] | Maximum [Member] | Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.75%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.75%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Revolving Credit Agreement - WNRL [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.75%