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Other Accrued Liabilities (Tables)
3 Months Ended
Mar. 31, 2021
Payables and Accruals [Abstract]  
Schedule of Other Accrued Liabilities
March 31,
2021
December 31,
2020
Royalties$83,682 $72,401 
Transportation Charges17,228 15,969 
Accrued Interest16,677 26,549 
Deferred Revenue10,889 10,986 
Accrued Other Taxes9,980 10,580 
Accrued Payroll & Benefits6,026 5,009 
Litigation Contingency5,884 2,025 
Purchased Gas Payable3,280 1,528 
Short-Term Incentive Compensation2,608 20,340 
Other13,405 23,144 
Current Portion of Long-Term Liabilities:
Asset Retirement Obligations8,455 8,455 
Salary Retirement1,802 1,787 
Total Other Accrued Liabilities$179,916 $198,773