Equity Method Investment (Narrative) (Details) $ in Thousands	6 Months Ended
Jun. 30, 2020 USD ($) item bbl	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Investment in equity method investee	$ 3,662	$ 4,329
NLR Energy Logistics LLC [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Delek Renewables LLC [Member] \| NLR Energy Logistics LLC [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
NLR Energy Logistics LLC [Member]
Related Party Transaction [Line Items]
Number of train car units \| item	110
Number of barrels of storage \| bbl	100,000
Investment in equity method investee	$ 3,700

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant