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Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 140,112	$ 142,268	$ 117,637	$ 163,401	$ 138,610	$ 137,556	$ 155,342	$ 152,483	$ 563,418	$ 583,992	$ 657,609
Lease Revenue - Affiliate									260,088	193,865
Amortization of customer contract intangible assets									7,211	7,211	6,009
Service Revenue - Third Party
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									18,230	23,730
Service Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									51,400	35,208
Product Revenue - Third Party
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									162,522	299,248
Product Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									71,178	31,941
Pipelines and Transportation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									251,469	178,318	153,567
Lease Revenue - Affiliate									216,105	155,211
Pipelines and Transportation | Service Revenue - Third Party
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									17,596	23,107
Pipelines and Transportation | Service Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									17,768	0
Pipelines and Transportation | Product Revenue - Third Party
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									0	0
Pipelines and Transportation | Product Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									0	0
Wholesale Marketing and Terminalling
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									311,949	405,674	$ 504,042
Lease Revenue - Affiliate									43,983	38,654
Wholesale Marketing and Terminalling | Service Revenue - Third Party
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									634	623
Wholesale Marketing and Terminalling | Service Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									33,632	35,208
Wholesale Marketing and Terminalling | Product Revenue - Third Party
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									162,522	299,248
Wholesale Marketing and Terminalling | Product Revenue - Affiliate
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers									$ 71,178	$ 31,941

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Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable.

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