Debt Revolving Credit Facility (Details) - Revolving Credit Facility [Member] - USD ($)	Oct. 16, 2013	Sep. 30, 2015	Feb. 11, 2015
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, 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, Remaining Borrowing Capacity		$ 299,300,000
Letters of Credit Outstanding, Amount		700,000
Long-term Line of Credit		0	$ 269,000,000
Standby Letters of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	25,000,000
Loans [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 10,000,000
Long-term Line of Credit		$ 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%