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Other Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Payables and Accruals [Abstract]    
Royalties $ 184,769 $ 152,498
Accrued Interest 34,568 36,035
Deferred Revenue 15,724 18,984
Transportation Charges 14,705 15,808
Accrued Other Taxes 13,553 12,681
Short-Term Incentive Compensation 6,114 19,591
Accrued Payroll & Benefits 5,868 5,747
Litigation Contingency 5,683 1,200
Purchased Gas Payable 1,257 757
Other 10,950 15,435
Current Portion of Long-Term Liabilities:    
Asset Retirement Obligations 7,529 7,154
Salary Retirement 1,879 1,842
Total Other Accrued Liabilities $ 302,599 $ 287,732