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Related Party Transactions - Summary of Transactions (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Related Party Transaction [Line Items] |  |  |  |  |
Revenues | [1] | $ 88,722 | $ 87,629 | $ 184,916 | $ 194,328
Delek US and affiliates |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenues |  | 88,722 | 87,629 | 184,916 | 194,328
General and administrative expenses |  | 1,994 | 2,703 | 4,113 | 6,072
Purchases from Affiliates | Delek US and affiliates |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Purchases from Affiliates |  | 74,128 | 29,730 | 139,943 | 110,493
Operating and maintenance expense | Delek US and affiliates |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Operating and maintenance expenses |  | $ 9,477 | $ 10,310 | $ 19,561 | $ 23,067
[1] | See Note 3 for a description of our material affiliate revenue transactions.

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- Definition Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.1(c)) -URI http://asc.fasb.org/extlink&oid=120401555&loc=SL114874292-224272 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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