Segment Disclosures, Results (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013		Jun. 30, 2014	Jun. 30, 2013		Dec. 31, 2013
REVENUES
Affiliate	$ 114,214	$ 54,102		$ 223,794	$ 101,994
Third-party	16,111	6,003		31,580	9,733
Total Revenues	130,325	60,105		255,374	111,727
OPERATING INCOME
Segment Operating Income	54,951	23,731		120,375	52,307
Interest and financing costs, net	(17,473)	(6,571)		(35,220)	(12,175)
Interest income	0	470		0	493
NET INCOME	32,766	13,526		77,264	32,204
Segment Reporting Information, Additional Information
Capital Expenditures	47,545	22,434		74,029	32,670
Identifiable Assets	1,747,539			1,747,539			1,502,312
Crude Oil Gathering
REVENUES
Affiliate	25,115	20,529		48,366	41,906
Third-party	1,968	416		3,341	730
Total Revenues	27,083	20,945		51,707	42,636
OPERATING INCOME
Segment Operating Income	11,925	7,688		22,939	16,715
Segment Reporting Information, Additional Information
Capital Expenditures	33,667	14,924		51,322	18,869
Identifiable Assets	212,603			212,603			154,583
Terminalling and Transportation
REVENUES
Affiliate	89,099	33,573	[1]	175,428	60,088	[1]
Third-party	14,143	5,587		28,239	9,003
Total Revenues	103,242	39,160		203,667	69,091
OPERATING INCOME
Segment Operating Income	43,026	16,043		97,436	35,592
Segment Reporting Information, Additional Information
Capital Expenditures	13,878	7,510		22,707	13,801
Identifiable Assets	1,503,002			1,503,002			1,299,310
Other
OPERATING INCOME
Unallocated general and administrative expenses	(4,712)	(4,104)		(7,891)	(8,421)
Interest and financing costs, net	(17,473)	(6,571)		(35,220)	(12,175)
Interest income	0	470		0	493
Segment Reporting Information, Additional Information
Identifiable Assets	$ 31,934			$ 31,934			$ 48,419

[1] Our Predecessor did not record revenue for transactions with Tesoro in the Terminalling and Transportation segment for assets acquired in the Acquisitions from Tesoro prior to the effective date of each acquisition.