Earnings per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Oct. 30, 2015
Earnings Per Share [Abstract]
Net income		$ 6,858	$ 12,233	$ 22,595	$ 24,735
Less net loss attributable to General Partner	[1]	(7,165)	(4,260)	(23,309)	(22,996)
Net Income (Loss) Allocated to Limited Partners		14,023	16,493	45,904	47,731
Incentive Distribution, Distribution		(1,175)	(326)	(2,857)	(481)
Distribution Made to Limited Partner, Cash Distributions Declared				(61,767)
Net loss attributable to General Partner		(7,165)	(4,260)	(23,309)	(22,996)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		(8,474)	(925)	(15,863)	(1,674)
TexNew Mex 16 inch pipeline [Member] | Western Refining, Inc. [Member]
Earnings Per Share [Abstract]
Economic Rights, Crude Oil Throughput, Percent						80.00%
Common Units [Member]
Earnings Per Share [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared		(11,913)	(8,766)	(31,366)	(25,086)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		(4,874)	(474)	(8,636)	(858)
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic		$ 7,039	$ 8,292	$ 22,730	$ 24,228
Weighted Average Number of Shares Outstanding, Basic		30,884,000	24,017,000	27,260,000	24,006,000
Weighted Average Number of Shares Outstanding, Diluted		30,901,000	24,024,000	27,274,000	24,024,000
Earnings Per Share, Basic		$ 0.23	$ 0.35	$ 0.83	$ 1.01
Earnings Per Share, Diluted		$ 0.23	$ 0.35	$ 0.83	$ 1.01
Subordinated Units [Member]
Earnings Per Share [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared		$ (9,409)	$ (8,326)	$ (27,544)	$ (23,838)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		(3,600)	(451)	(7,227)	(816)
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic		$ 5,809	$ 7,875	$ 20,317	$ 23,022
Weighted Average Number of Shares Outstanding, Basic and Diluted		22,811,000	22,811,000	22,811,000	22,811,000
Earnings Per Share, Basic and Diluted		$ 0.25	$ 0.35	$ 0.89	$ 1.01
Weighted Average Number Diluted Shares Outstanding Adjustment				0
General Partner [Member]
Earnings Per Share [Abstract]
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic		$ (5,990)	$ (3,934)	$ (20,452)	$ (22,515)

[1] We apply the two-class method to calculate earnings per unit and allocate the results of operations of the St. Paul Park Logistics Assets prior to the St. Paul Park Logistics Transaction and the TexNew Mex Pipeline System prior to the TexNew Mex Pipeline Acquisition entirely to our general partner. The limited partners had no rights to the results of operations before these acquisitions.