Segment Disclosures, Results (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
REVENUES
Affiliate	$ 109,580	$ 47,892
Third-party	15,469	3,730
Total Revenues	125,049	51,622
OPERATING AND MAINTENANCE EXPENSES
Segment Operating and Maintenance Expenses	45,098	19,489
IMBALANCE SETTLEMENT GAINS
Segment Imbalance Settlement Gains	(2,417)	(2,424)
GENERAL AND ADMINISTRATIVE EXPENSES
Segment General and Administrative Expenses	6,167	1,736
DEPRECIATION AND AMORTIZATION EXPENSES
Segment Depreciation and Amortization Expenses	15,525	4,081
LOSS (GAIN) ON ASSET DISPOSALS AND IMPAIRMENTS
Segment Loss (Gain) on Asset Disposals	(4,748)	164
OPERATING INCOME
Segment Operating Income	65,424	28,576
Interest and financing costs, net	(17,747)	(5,604)
Interest income	0	23
NET INCOME	44,498	18,678
Segment Reporting Information, Additional Information
Capital Expenditures	26,484	10,236
Identifiable Assets	1,536,186		1,502,312
Crude Oil Gathering
REVENUES
Affiliate	23,251	21,377
Third-party	1,373	314
Total Revenues	24,624	21,691
OPERATING AND MAINTENANCE EXPENSES
Segment Operating and Maintenance Expenses	12,072	12,360
IMBALANCE SETTLEMENT GAINS
Segment Imbalance Settlement Gains	(1,137)	(1,396)
GENERAL AND ADMINISTRATIVE EXPENSES
Segment General and Administrative Expenses	1,652	694
DEPRECIATION AND AMORTIZATION EXPENSES
Segment Depreciation and Amortization Expenses	1,023	1,006
LOSS (GAIN) ON ASSET DISPOSALS AND IMPAIRMENTS
Segment Loss (Gain) on Asset Disposals	0	0
OPERATING INCOME
Segment Operating Income	11,014	9,027
Segment Reporting Information, Additional Information
Capital Expenditures	17,655	3,945
Identifiable Assets	173,993		154,583
Terminalling and Transportation
REVENUES
Affiliate	86,329	26,515
Third-party	14,096	3,416
Total Revenues	100,425	29,931
OPERATING AND MAINTENANCE EXPENSES
Segment Operating and Maintenance Expenses	33,026	7,129
IMBALANCE SETTLEMENT GAINS
Segment Imbalance Settlement Gains	(1,280)	(1,028)
GENERAL AND ADMINISTRATIVE EXPENSES
Segment General and Administrative Expenses	4,515	1,042
DEPRECIATION AND AMORTIZATION EXPENSES
Segment Depreciation and Amortization Expenses	14,502	3,075
LOSS (GAIN) ON ASSET DISPOSALS AND IMPAIRMENTS
Segment Loss (Gain) on Asset Disposals	(4,748)	164
OPERATING INCOME
Segment Operating Income	54,410	19,549
Segment Reporting Information, Additional Information
Capital Expenditures	8,829	6,291
Identifiable Assets	1,292,336		1,298,073
Other
OPERATING INCOME
Unallocated general and administrative expenses	(3,179)	(4,317)
Interest and financing costs, net	(17,747)	(5,604)
Interest income	0	23
Segment Reporting Information, Additional Information
Identifiable Assets	$ 69,857		$ 49,656