Earnings per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015		Oct. 30, 2015
Earnings Per Share [Abstract]
Net income	$ 17,874	$ 14,653		$ 31,881	$ 28,064
Less net loss attributable to General Partner	0	(1,262)	[1]	0	(3,174)	[1]
Net Income (Loss) Allocated to Limited Partners	17,874	15,915		31,881	31,238
Incentive Distribution, Distribution	(921)	(139)		(1,682)	(155)
Distribution Made to Limited Partner, Cash Distributions Declared				(39,270)
Net income attributable to Predecessor	0	(1,262)		0	(3,174)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(2,086)	(497)		(7,389)	(749)
Common Units [Member]
Earnings Per Share [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared	(9,858)	(8,346)		(19,453)	(16,320)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(1,119)	(255)		(3,895)	(384)
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic	$ 8,739	$ 8,091		$ 15,558	$ 15,936
Weighted Average Number of Shares Outstanding, Basic	26,409,000	24,017,000		25,429,000	24,001,000
Weighted Average Number of Shares Outstanding, Diluted	26,427,000	24,051,000		25,441,000	24,023,000
Earnings Per Share, Basic	$ 0.33	$ 0.34		$ 0.61	$ 0.66
Earnings Per Share, Diluted	$ 0.33	$ 0.34		$ 0.61	$ 0.66
Subordinated Units [Member]
Earnings Per Share [Abstract]
Distribution Made to Limited Partner, Cash Distributions Declared	$ (9,181)	$ (7,927)		$ (18,135)	$ (15,512)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(967)	(242)		(3,494)	(365)
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic	$ 8,214	$ 7,685		$ 14,641	$ 15,147
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	$ 0.36	$ 0.34		$ 0.64	$ 0.66
Weighted Average Number Diluted Shares Outstanding Adjustment				0
General Partner [Member]
Earnings Per Share [Abstract]
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic	$ 921	$ (1,123)		$ 1,682	$ (3,019)
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.