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Commitments and Contingencies - Legal, Environmental or Regulatory (Details) $ in Thousands | 1 Months Ended | 6 Months Ended | 71 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2015 bbl | Mar. 31, 2021 USD ($) | Mar. 31, 2021 USD ($) lawsuit | Dec. 31, 2020 USD ($) | Apr. 25, 2019 USD ($) | Sep. 07, 2018 count
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Estimated undiscounted reserve for environmental liabilities |  | $ 160,000 | $ 160,000 | $ 141,000 |  |
Estimated undiscounted reserve for environmental liabilities, short-term |  | 114,000 | 114,000 | 94,000 |  |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  | 114,000 | 114,000 | 97,000 |  |
Other long-term liabilities and deferred credits |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Estimated undiscounted reserve for environmental liabilities, long-term |  | 46,000 | 46,000 | 47,000 |  |
Trade accounts receivable and other receivables, net |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  | 113,000 | 113,000 | 96,000 |  |
Other long-term assets, net |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  | 1,000 | 1,000 | $ 1,000 |  |
Line 901 Incident |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Estimated undiscounted reserve for environmental liabilities |  | 105,000 | 105,000 |  |  |
Amounts probable of recovery under insurance and from third parties under indemnification agreements |  | 110,000 | 110,000 |  |  |
Estimated size of release (in bbl) | bbl | 2,934 |  |  |  |  |
Estimated size of release to reach Pacific Ocean (in bbl) | bbl | 598 |  |  |  |  |
Aggregate total estimated costs |  | 485,000 | 485,000 |  |  |
Recoveries from insurance carriers |  |  | 250,000 |  |  |
Total release costs probable of recovery |  | 360,000 | $ 360,000 |  |  |
Line 901 Incident | Civil Penalties |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Penalties or compensation paid |  | 24,000 |  |  |  |
Line 901 Incident | Compensation for Injuries to, Destruction of, Loss of Use of, Natural Resources |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Penalties or compensation paid |  | $ 22,325 |  |  |  |
Line 901 Incident | May 2016 Indictment |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Number of felony discharges found guilty | count |  |  |  |  |  | 1
Number of misdemeanor charges found guilty | count |  |  |  |  |  | 8
Number of misdemeanor charges found guilty, reporting | count |  |  |  |  |  | 1
Number of misdemeanor charges found guilty, strict liability discharge | count |  |  |  |  |  | 1
Number of misdemeanor charges found guilty, strict liability animal takings | count |  |  |  |  |  | 6
Number of misdemeanor charges found not guilty, strict liability animal takings | count |  |  |  |  |  | 1
Fines or penalties assessed |  |  |  |  | $ 3,350 |
Line 901 Incident | Class Action Lawsuits |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Number of cases filed during the period | lawsuit |  |  | 9 |  |  |
Line 901 Incident | Unitholder Derivative Lawsuits |  |  |  |  |  |
Legal, Environmental or Regulatory Matters |  |  |  |  |  |
Number of cases filed during the period | lawsuit |  |  | 4 |  |  |

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