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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Operating Loss Carryforwards |  |  |
Income tax expense | $ 4,197 | $ 5,918 | $ 7,927
Cash paid for income taxes | 3,356 | 1,404 | 2,250
Income taxes payable | 1,283 | 652 |
Difference between partnership's tax basis and reported amounts | 69,103 | 124,695 |
Martin Transportation Inc |  |  |
Operating Loss Carryforwards |  |  |
Income tax expense | 3,272 | 5,478 | 7,431
State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes payable | 931 | 567 |
MTI |  |  |
Operating Loss Carryforwards |  |  |
Income tax expense | 3,272 | 5,478 | 7,431
Net operating loss carryforwards | 2,546 |  |
Net operating loss carryforwards, subject to expiration | 2,445 |  |
Net operating loss carryforwards, not subject to expiration | 101 |  |
MTI | Federal |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 44 | 29 |
MTI | State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 352 | 85 |
Texas |  |  |
Operating Loss Carryforwards |  |  |
State income taxes | $ 925 | $ 440 | $ 496

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