Earnings per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Oct. 30, 2015
Earnings Per Share [Abstract]
Net income		$ 14,007	$ 13,411
Less net loss attributable to General Partner	[1]	0	(1,912)
Net Income (Loss) Allocated to Limited Partners		14,007	15,323
Incentive Distribution, Distribution		(761)	(16)
Distribution Made to Limited Partner, Cash Distributions Declared		(19,310)
Net income attributable to Predecessor		0	(1,912)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		(5,303)	(252)
Common Units [Member]
Earnings Per Share [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared		(9,595)	(7,974)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		(2,743)	(129)
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic		$ 6,852	$ 7,845
Weighted Average Number of Shares Outstanding, Basic		24,448,000	23,985,000
Weighted Average Number of Shares Outstanding, Diluted		24,454,000	23,996,000
Earnings Per Share, Basic		$ 0.28	$ 0.33
Earnings Per Share, Diluted		$ 0.28	$ 0.33
Subordinated Units [Member]
Earnings Per Share [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared		$ (8,954)	$ (7,585)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		(2,560)	(123)
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic		$ 6,394	$ 7,462
Weighted Average Number of Shares Outstanding, Basic and Diluted		22,811,000	22,811,000
Earnings Per Share, Basic and Diluted		$ 0.28	$ 0.33
Weighted Average Number Diluted Shares Outstanding Adjustment		0
General Partner [Member]
Earnings Per Share [Abstract]
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic		$ 761	$ (1,896)
TexNew Mex Units [Member]
Earnings Per Share [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared		$ 0
TexNew Mex 16 inch pipeline [Member] | Western Refining, Inc. [Member]
Earnings Per Share [Abstract]
Economic Rights, Crude Oil Throughput, Percent				80.00%

[1] We apply the two-class method to calculate earnings per unit and allocate the results of operations of 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 this acquisition.