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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | $ 7,927 | $ 3,380 | $ 1,736
Cash paid for income taxes | 2,250 | 1,232 | 416
Income taxes payable | 665 | 385 |
Difference between partnership's tax basis and reported amounts | 112,841 | 91,893 |
Martin Transportation Inc |  |  |
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | 7,431 | 3,080 | 1,268
State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes payable | 451 | 304 |
MTI |  |  |
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | 7,431 | 3,080 | 1,268
Net operating loss carryforwards | 33,169 |  |
Net operating loss carryforwards, subject to expiration | 9,001 |  |
Net operating loss carryforwards, not subject to expiration | 24,168 |  |
MTI | State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 214 | 81 |
MTI | Federal |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 374 | 70 |
Texas |  |  |
Operating Loss Carryforwards |  |  |
State income taxes | $ 496 | $ 300 | $ 468

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