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Asset Retirement Obligations
 9 Months Ended
Sep. 30, 2020
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations Asset Retirement Obligations
Activity related to the Company’s asset retirement obligations is as follows:
(In thousands)Nine Months Ended 
September 30, 2020
Balance at beginning of period$72,098 
Liabilities incurred8,976 
Liabilities settled (8)
Accretion expense3,104 
Balance at end of period84,170 
Less: current asset retirement obligations(500)
Noncurrent asset retirement obligations$83,670