Description of Business and Presentation of Financial Statements (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Ownership Interests [Line Items]
Goodwill, Impairment Loss		$ 0
Ownership percentage, controlling interest	37.00%	37.00%
General partner interest		2.00%
Ownership percentage in equity method investment	50.00%	50.00%
Underlying Equity in Net Assets	$ 109,291,000	$ 109,291,000
Equity Method Investments	165,609,000.00	165,609,000.00	$ 79,438,000
Difference Between Carrying Amount and Underlying Equity	(56,318,000)	(56,318,000)
Asset Retirement Obligation	8,000,000	8,000,000	7,600,000
UNEV acquisition, contingent consideration	30,000,000	30,000,000
UNEV acquisition, HFC incentive distributions	1,250,000	1,250,000
Class B unit	40,319,000	40,319,000	33,941,000
Minimum Annualized Payments Receivable Aggregate	2,900,000,000	2,900,000,000
Accrual for Environmental Loss Contingencies	$ 7,100,000	$ 7,100,000	7,700,000
Partners' Capital Account, Units, Sold in Private Placement	3,420,000
Sale of Stock, Price Per Share	$ 30.18	$ 30.18
Proceeds from Issuance of Private Placement	$ 103,000,000	$ 103,000,000
Contribution from general partner	$ 2,100,000	$ 2,577,000	128,476,000	$ 120,111,000
SLC Pipeline [Member]
Other Ownership Interests [Line Items]
Ownership percentage in equity method investment	25.00%	25.00%
UNEV Pipeline [Member]
Other Ownership Interests [Line Items]
Ownership percentage in equity method investment	75.00%	75.00%
Frontier Pipeline [Member]
Other Ownership Interests [Line Items]
Ownership percentage in equity method investment	50.00%	50.00%
Osage Pipeline [Member]
Other Ownership Interests [Line Items]
Ownership percentage in equity method investment	50.00%	50.00%
Underlying Equity in Net Assets	$ 12,100,000	$ 12,100,000
Difference Between Carrying Amount and Underlying Equity	$ 33,100,000	$ 33,100,000
Cheyenne [Member]
Other Ownership Interests [Line Items]
Ownership percentage in equity method investment	50.00%	50.00%
Other Fixed Assets [Member] | Minimum [Member]
Other Ownership Interests [Line Items]
Property, Plant and Equipment, Useful Life		5 years
Other Fixed Assets [Member] | Maximum [Member]
Other Ownership Interests [Line Items]
Property, Plant and Equipment, Useful Life		10 years
Pipelines,terminals and tankage [Member] | Minimum [Member]
Other Ownership Interests [Line Items]
Property, Plant and Equipment, Useful Life		25 years
Pipelines,terminals and tankage [Member] | Maximum [Member]
Other Ownership Interests [Line Items]
Property, Plant and Equipment, Useful Life		32 years
Terminal Facilities and Tankage [Member] [Member] | Minimum [Member]
Other Ownership Interests [Line Items]
Property, Plant and Equipment, Useful Life		15 years
Terminal Facilities and Tankage [Member] [Member] | Maximum [Member]
Other Ownership Interests [Line Items]
Property, Plant and Equipment, Useful Life		25 years
Subsequent Event [Member]
Other Ownership Interests [Line Items]
Minimum Annualized Payments Receivable					$ 290,000,000	$ 295,000,000	$ 340,000,000	$ 363,000,000	$ 363,000,000
Cheyenne [Member]
Other Ownership Interests [Line Items]
Underlying Equity in Net Assets	$ 29,658,000	$ 29,658,000
Equity Method Investments	44,657,000	44,657,000
Difference Between Carrying Amount and Underlying Equity	(14,999,000)	(14,999,000)
Osage Pipeline [Member]
Other Ownership Interests [Line Items]
Underlying Equity in Net Assets	10,730,000	10,730,000
Equity Method Investments	43,375,000	43,375,000
Difference Between Carrying Amount and Underlying Equity	(32,645,000)	(32,645,000)
Frontier Pipeline [Member]
Other Ownership Interests [Line Items]
Underlying Equity in Net Assets	11,630,000	11,630,000
Equity Method Investments	53,160,000	53,160,000
Difference Between Carrying Amount and Underlying Equity	(41,530,000)	(41,530,000)
SLC Pipeline [Member]
Other Ownership Interests [Line Items]
Underlying Equity in Net Assets	57,273,000	57,273,000
Equity Method Investments	24,417,000	24,417,000
Difference Between Carrying Amount and Underlying Equity	$ 32,856,000	32,856,000
Tulsa Tanks [Member]
Other Ownership Interests [Line Items]
Woods Cross acquisition, net income adjustment			900,000	1,000,000
Contribution from general partner			924,000	2,904,000
Woods Cross [Member]
Other Ownership Interests [Line Items]
Woods Cross acquisition, net income adjustment			$ 1,800,000	$ 700,000
Contribution from general partner		$ 51,262,000