The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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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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Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs.

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Segment Information (Narrative) (Details) $ in Thousands	3 Months Ended			6 Months Ended
Segment Information (Narrative) (Details) $ in Thousands	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Shipping, Handling and Transportation Costs		$ 24,000
Number of Reportable Segments	3
Equity Method Investment, Ownership Percentage	50.00%			50.00%
Revenues	$ 4,471,236		$ 3,458,864	$ 8,599,663	$ 6,539,347
UNEV Pipeline [Member]
Segment Reporting Information [Line Items]
Equity Method Investment, Ownership Percentage	75.00%			75.00%