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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | $ 3,380 | $ 1,736 | $ 1,900
Cash paid for income taxes | 1,232 | 416 | 515
Income taxes payable | 385 | 556 |
Difference between partnership's tax basis and reported amounts | 91,893 | 88,526 |
State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes payable | 304 | 455 |
MTI |  |  |
Operating Loss Carryforwards |  |  |
Income Tax Expense (Benefit) | 3,080 | 1,268 |
Net operating loss carryforwards | 67,681 |  |
Net operating loss carryforwards, subject to expiration | 19,379 |  |
Net operating loss carryforwards, not subject to expiration | 48,302 |  |
MTI | State |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 81 | 101 |
MTI | Federal |  |  |
Operating Loss Carryforwards |  |  |
Income taxes refundable | 70 | 0 |
Texas |  |  |
Operating Loss Carryforwards |  |  |
State income taxes | $ 300 | $ 468 | $ 458

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