Related Party Transactions (Details) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended			6 Months Ended
	Oct. 31, 2014 bbl $ / gal	Dec. 31, 2013 USD ($)	Jun. 30, 2016 USD ($) bbl	Dec. 31, 2015 USD ($) bbl	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) bbl	Jun. 30, 2015 USD ($) bbl	Oct. 30, 2015 bbl
Related Party Transaction [Line Items]
Active Storage Capacity | bbl			8,400,000			8,400,000
Deferred revenue - affiliate | $			$ 13,808	$ 10,130		$ 13,808
Related Party Transaction, Expenses from Transactions with Related Party | $			12,347		$ 10,967	24,372	$ 21,957
Operating Leases, Rent Expense | $			2,500		2,300	4,900	4,600
Northern Tier Energy LP [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party | $			$ 100		$ 0	$ 200	$ 90
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
Pipelines and related assets | TexNew Mex 16 inch pipeline [Member]
Related Party Transaction [Line Items]
Active Storage Capacity | bbl								80,000
TexNew Mex 16 inch pipeline [Member]
Related Party Transaction [Line Items]
Long-term Purchase Commitment, Minimum Volume Required | bbl				13,000
TexNew Mex 16 inch pipeline [Member] | Western Refining, Inc. [Member]
Related Party Transaction [Line Items]
Economic Rights, Crude Oil Throughput, Percent								80.00%