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Commitments and Contingent Liabilities - Narratives (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Subsurface Remedial and Wetlands/Marsh Management |  |
Loss Contingencies |  |
Accrual for environmental loss contingencies | $ 410 | $ 510
Subsurface Remediation and Soil Vapor Extraction |  |
Loss Contingencies |  |
Accrual for environmental loss contingencies | 306 | $ 427
ABL Facility |  |
Loss Contingencies |  |
Letters of credit outstanding | $ 17,541 |

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