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Asset Retirement Obligations (Tables)
6 Months Ended
Jun. 30, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Changes in Asset Retirement Obligations
The following table reflects the changes in the Company’s ARO during the six months ended June 30, 2020:
 (In thousands)
Balance at December 31, 2019$56,784  
Liabilities incurred during period508  
Liabilities settled during period(196) 
Accretion expense during period(1)
1,545  
Balance at June 30, 2020$58,641  
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(1)Included in depreciation, depletion and amortization on the Company’s Condensed Consolidated Statements of Operations.