Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Commitments and Contingencies          
Environmental expenses $ 300 $ 1,500 $ 700 $ 2,900  
Environmental Remediation Expense, before Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration] Direct Operating Costs Direct Operating Costs Direct Operating Costs Direct Operating Costs  
Accrued insurance proceeds and third-party receivables $ 5,900   $ 5,900   $ 5,700
Insurance proceeds and third-party receivables included in Other Receivables 4,342   4,342   4,064
Insurance proceeds and third-party receivables included in Other Assets 1,600   $ 1,600   $ 1,600
Delivery Commitment          
Commitments and Contingencies          
Remaining commitment agreement term     6 years    
Remaining minimum commitment 23,300   $ 23,300    
Purchase Obligations          
Commitments and Contingencies          
Purchase obligations and commitments $ 14,800   $ 14,800