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Long-Term Debt And Other Long-Term Liabilities (Tables)
 6 Months Ended
Jun. 30, 2021
Debt Disclosure [Abstract]  
Long-Term Debt As of the date indicated, our long-term debt consisted of the following:
June 30,
2021		December 31,
2020
 (In thousands)
Current portion of long-term debt:
Exit credit agreement with an average interest rate of 6.7% and 6.6% at June 30, 2021 and December 31, 2020, respectively
$— $600 
Long-term debt:
Exit credit agreement with an average interest rate of 6.7% and 6.6% at June 30, 2021 and December 31, 2020, respectively
$35,000 $98,400 
Other Long-Term Liabilities Other long-term liabilities consisted of the following:
June 30,
2021		December 31,
2020
 (In thousands)
Asset retirement obligation (ARO) liability$23,172 $23,356 
Workers’ compensation11,730 10,164 
Finance lease obligations— 3,216 
Contract liability2,724 4,172 
Separation benefit plans3,237 4,201 
Gas balancing liability4,238 3,997 
Other long-term liability1,321 1,321 
46,422 50,427 
Less current portion7,551 11,168 
Total other long-term liabilities$38,871 $39,259