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Other Accrued Liabilities (Tables)
6 Months Ended
Jun. 30, 2021
Payables and Accruals [Abstract]  
Schedule of Other Accrued Liabilities
June 30,
2021
December 31,
2020
Royalties$85,968 $72,401 
Accrued Interest41,310 26,549 
Transportation Charges17,648 15,969 
Accrued Other Taxes13,430 10,580 
Deferred Revenue10,980 10,986 
Accrued Payroll & Benefits7,070 5,009 
Short-Term Incentive Compensation5,323 20,340 
Litigation Contingency2,410 2,025 
Purchased Gas Payable428 1,528 
Other9,306 23,144 
Current Portion of Long-Term Liabilities:
Asset Retirement Obligations8,455 8,455 
Salary Retirement1,817 1,787 
Total Other Accrued Liabilities$204,145 $198,773