Related Party Transactions (Leasing Agreements) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	3 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Maximum [Member] Western Refining, Inc. [Member] Ground Lease and Access Agreements [Member]
Related Party Transaction [Line Items]
Operating Leases, Rent Expense	$ 0.58	$ 0.06	$ 0.06	$ 0.10

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration