Earnings Per Unit (Details) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares bbl	Sep. 30, 2015 USD ($) $ / shares shares	Jun. 30, 2015 USD ($) $ / shares shares	Mar. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Sep. 30, 2014 USD ($) $ / shares shares	Jun. 30, 2014 USD ($) $ / shares shares	Mar. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) $ / shares shares	Oct. 30, 2015
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 15,387	$ 20,174	$ 14,653	$ 13,411	$ 20,988	$ 15,390	$ 16,012	$ 15,206	$ 63,625	$ 67,596	$ (42,727)
Less net income (loss) attributable to General Partner									1,052	14,604	(51,255)
Net income attributable to limited partners	$ 14,842	$ 16,493	$ 15,915	$ 15,323	$ 18,819	$ 12,265	$ 10,975	$ 10,933	62,573	52,992	8,528
Incentive Distribution, Distribution									(1,085)	0	0
Net Income (Loss) Allocated to General Partners									1,052	14,604	(51,255)
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									(5,821)	(444)	8,528
Weighted Average Number of Shares Outstanding, Basic | shares	24,314,000	24,017,000	24,017,000	23,985,000	23,795,000	22,811,000	22,811,000	22,811,000
Weighted Average Number of Shares Outstanding, Diluted | shares	24,321,000	24,024,000	24,051,000	23,996,000	23,861,000	22,883,000	22,861,000	22,815,000
Weighted Average Number of Shares Outstanding, Basic and Diluted | shares	22,811,000	22,811,000	22,811,000	22,811,000	22,811,000	22,811,000	22,811,000	22,811,000
Earnings Per Share, Basic | $ / shares	$ 0.30	$ 0.35	$ 0.34	$ 0.33	$ 0.40	$ 0.27	$ 0.24	$ 0.24
Earnings Per Share, Diluted | $ / shares	0.30	0.35	0.34	0.33	0.40	0.27	0.24	0.24
Earnings Per Share, Basic and Diluted | $ / shares	$ 0.29	$ 0.35	$ 0.34	$ 0.33	$ 0.40	$ 0.27	$ 0.24	$ 0.24
TexNew Mex Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Distribution Made to Limited Partner, Cash Distributions Declared									(310)	0	0
Subordinated Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									(2,831)	(221)	4,264
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic									29,732	26,313	4,264
Distribution Made to Limited Partner, Cash Distributions Declared									$ (32,563)	$ (26,534)	$ 0
Weighted Average Number of Shares Outstanding, Basic and Diluted | shares									22,811,000	22,811,000	22,811,000
Earnings Per Share, Basic and Diluted | $ / shares									$ 1.30	$ 1.15	$ 0.19
Weighted Average Number Diluted Shares Outstanding Adjustment | shares									0
General Partner [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic									$ 2,137	$ 14,604	$ (51,255)
Common Units [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									(2,990)	(223)	4,264
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic									31,446	26,679	4,264
Distribution Made to Limited Partner, Cash Distributions Declared									$ (34,436)	$ (26,902)	$ 0
Weighted Average Number of Shares Outstanding, Basic | shares									24,084,000	23,059,000	22,811,000
Weighted Average Number of Shares Outstanding, Diluted | shares									24,099,000	23,107,000	22,813,000
Earnings Per Share, Basic | $ / shares									$ 1.31	$ 1.16	$ 0.19
Earnings Per Share, Diluted | $ / shares									$ 1.30	$ 1.15	$ 0.19
TexNew Mex 16 inch pipeline [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Long-term Purchase Commitment, Minimum Volume Required | bbl	13,000
TexNew Mex 16 inch pipeline [Member] | Western Refining, Inc. [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Economic Rights, Crude Oil Throughput, Percent												80.00%