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Other Long-Term Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2022
Other Liabilities, Noncurrent [Abstract] |
Schedule of Other Long-term Liabilities | Other long-term liabilities consist of the following as of December 31, 2021 and March 31, 2022 (in thousands):
| December 31, 2021 |  | March 31, 2022
Contract liabilities, net of current portion | $ | 34,704 |  |  | $ | 35,259 |
Asset retirement obligations | 9,122 |  |  | 9,423 |
Other | 3,263 |  |  | 3,405 |
Other long-term liabilities | $ | 47,089 |  |  | $ | 48,087 |

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- Definition Tabular disclosure of other noncurrent liabilities. + References No definition available. + Details
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