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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | $ 5,918 | $ 7,927 | $ 3,380
Cash paid for income taxes | 1,404 | 2,250 | 1,232
Income taxes payable | 652 | 665 |
Difference between partnership's tax basis and reported amounts | 124,695 | 112,841 |
Martin Transportation Inc |  |  |
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | 5,478 | 7,431 | 3,080
State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes payable | 567 | 451 |
MTI |  |  |
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | 5,478 | 7,431 | 3,080
Net operating loss carryforwards | 10,680 |  |
Net operating loss carryforwards, subject to expiration | 4,797 |  |
Net operating loss carryforwards, not subject to expiration | 5,883 |  |
MTI | Federal |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 29 | 374 |
MTI | State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 85 | 214 |
Texas |  |  |
Operating Loss Carryforwards |  |  |
State income taxes | $ 440 | $ 496 | $ 300

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