The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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Related Party Transactions (Details) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended			6 Months Ended
Related Party Transactions (Details) $ in Thousands	Oct. 31, 2014 bbl $ / gal	Dec. 31, 2013 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($) bbl	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Related Party Transaction [Line Items]
Deferred revenue - affiliate			$ 9,226	$ 6,779		$ 9,226
Operating Leases, Rent Expense			2,300		$ 2,500	4,600	$ 4,600
Northern Tier Energy LP [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party						100
Western Refining, Inc. [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party			$ 10,967		$ 10,514	$ 21,957	$ 20,997
Maximum [Member] \| Ground Lease and Access Agreements [Member] \| Western Refining, Inc. [Member]
Related Party Transaction [Line Items]
Operating Leases, Rent Expense		$ 100
Product Supply Agreement [Member]
Related Party Transaction [Line Items]
Long-term Purchase Commitment, Minimum Quantity Required \| bbl				79,000
Fuel Distribution and Supply Agreement [Member]
Related Party Transaction [Line Items]
Deferred revenue - affiliate				$ 0
Long-term Purchase Commitment, Minimum Quantity Required \| bbl	645,000
Profit Margin, per Gallon \| $ / gal	0.03
Crude Oil Trucking Transportation Services Agreement [Member]
Related Party Transaction [Line Items]
Long-term Purchase Commitment, Minimum Quantity Required \| bbl	1,525,000