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Commitments and Contingencies (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Loss Contingencies [Line Items] |  |  |
Restricted cash | $ 5,401,000 | $ 6,151,000 | $ 8,191,000
Asset retirement obligation | 1,100,000 | 1,200,000 |
Health claims |  |  |
Loss Contingencies [Line Items] |  |  |
Threshold for claims to be insured by third party insurers | 250,000 |  |
Accrued liabilities for uninsured portion of claims | 700,000 | 700,000 |
Workers compensation auto and general liability claims |  |  |
Loss Contingencies [Line Items] |  |  |
Threshold for claims to be insured by third party insurers | 750,000 |  |
Accrued liabilities for uninsured portion of claims | 2,500,000 | $ 2,800,000 |
Performance Bonds |  |  |
Loss Contingencies [Line Items] |  |  |
Restricted cash | 5,400,000 |  |
Credit Agreement | Performance Bonds |  |  |
Loss Contingencies [Line Items] |  |  |
Letters of credit outstanding, amount | $ 45,300,000 |  |

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