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Benefit Plans - Unfunded Status (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | $ 41,367 | $ 56,411 | $ 60,479
Fair value of plan assets | 40,639 | 49,821 | $ 46,161
WY Refining |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | 24,730 | 34,333 |
Fair value of plan assets | 21,940 | 28,076 |
Underfunded/(overfunded) status | 2,790 | 6,257 |
Non-current assets | 0 | 0 |
Non-current liabilities | (2,790) | (6,257) |
Net amount recorded | (2,790) | (6,257) |
Net actuarial gain (loss) | 5,243 | 2,188 |
Total accumulated other comprehensive income (loss) | 5,243 | 2,188 |
U.S. Oil |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | 16,637 | 22,078 |
Fair value of plan assets | 18,699 | 21,745 |
Underfunded/(overfunded) status | (2,062) | 333 |
Non-current assets | 2,062 | 0 |
Non-current liabilities | 0 | (333) |
Net amount recorded | 2,062 | (333) |
Net actuarial gain (loss) | (318) | (2,892) |
Total accumulated other comprehensive income (loss) | $ (318) | $ (2,892) |

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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 + Details
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