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Contingencies (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) | Dec. 31, 2021 USD ($) name | Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items] |  |  |
Site Contingency, Names of Other Potentially Responsible Parties | name |  | 100 |
Litigation Settlement, Expense |  | $ 115,000 |
Loss Contingency, Range of Possible Loss, Maximum |  | 1,700,000 |
Loss Contingency, Range of Possible Loss, Portion Not Accrued |  | 500,000 |
Payments for Environmental Liabilities |  | 6,000 |
lower range of costs |  | 1,900,000 |
upper range of costs |  | 3,500,000 |
Litigation Settlement, Amount Awarded to Other Party | $ 6,750 |  |
Amount Authorized to Levy |  |  | $ 100
Estimated Litigation Liability |  | 750 |
EPA Investigation of Portland Harbor [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Loss Contingency, Damages Sought, Value |  | 1,200,000 |
Putative Shareholder Derivative Lawsuit [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Loss Contingency, Damages Sought, Value |  | $ 10,000 |

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- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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