Quarterly report pursuant to Section 13 or 15(d)

Additional Financial Statement Information - Other Balance Sheet information (Details)

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Additional Financial Statement Information - Other Balance Sheet information (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Other Receivables    
Insurance and Third Party Receivables for Remediation Expenses $ 3,919 $ 3,600
Reimbursable Projects and Other 852 754
Total Other Receivables 4,771 4,354
Prepaids and Deposits    
Prepaid Insurance and Other 4,499 5,744
Deposits 44 61
Total Prepaids and Deposits 4,543 5,805
Accrued and Other Current Liabilities    
Accrued Operating Expense 24,546 28,877
Accrued Capital Costs 25,366 16,161
Accrued Interest 15,951 8,262
Accrued Compensation 3,272 4,809
Lease Liabilities $ 1,204 $ 1,176
Current Lease Liabilities, Classification Total Accrued and Other Current Liabilities Total Accrued and Other Current Liabilities
Asset Retirement Obligation $ 1,203 $ 2,242
Other 3,643 3,884
Total Accrued and Other Current Liabilities 75,185 65,411
Other Long-Term Liabilities    
Noncurrent Lease Liabilities 7,489 7,719
Contingent Consideration Liability 2,559 2,702
Total Other Long-Term Liabilities $ 10,048 $ 10,421