Segment Reporting - Information Concerning Business Activities (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of reportable segments \| segment	3
Number of operating segments \| segment	3
Segment Reporting Information [Line Items]
Revenues	$ 325,491	$ 353,477
Segment operating earnings (losses)	3,851	(19,940)
Depreciation and amortization	5,053	4,473
Property and equipment additions	170	2,212
Refund received	300
Leasehold Improvements
Segment Reporting Information [Line Items]
Property and equipment additions	8	100
Marketing
Segment Reporting Information [Line Items]
Revenues	304,023	337,221
Depreciation and amortization	1,798	2,007
Property and equipment additions	210	2,032
Inventory liquidation (losses) gains	6,900	(24,200)
Transportation
Segment Reporting Information [Line Items]
Revenues	21,235	16,256
Depreciation and amortization	3,001	2,466
Property and equipment additions	(58)	41
Pipeline and storage
Segment Reporting Information [Line Items]
Revenues	233	0
Depreciation and amortization	254	0
Property and equipment additions	10	0
Operating segments
Segment Reporting Information [Line Items]
Revenues	325,710	353,477
Segment operating earnings (losses)	7,227	(17,046)
Operating segments \| Marketing
Segment Reporting Information [Line Items]
Revenues	304,023	337,221
Segment operating earnings (losses)	7,018	(17,651)
Operating segments \| Transportation
Segment Reporting Information [Line Items]
Revenues	21,268	16,256
Segment operating earnings (losses)	774	605
Operating segments \| Pipeline and storage
Segment Reporting Information [Line Items]
Revenues	419	0
Segment operating earnings (losses)	(565)	0
Other
Segment Reporting Information [Line Items]
Revenues	0	0
Segment operating earnings (losses)	0	0
Depreciation and amortization	0	0
Property and equipment additions	8	139
Intersegment
Segment Reporting Information [Line Items]
Revenues	(219)	0
Intersegment \| Marketing
Segment Reporting Information [Line Items]
Revenues	0	0
Intersegment \| Transportation
Segment Reporting Information [Line Items]
Revenues	(33)	0
Intersegment \| Pipeline and storage
Segment Reporting Information [Line Items]
Revenues	$ (186)	$ 0

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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The effect of liquidating LIFO (last in first out) inventory layers on income.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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