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Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2022
Asset Retirement Obligation [Abstract]  
Reconciliation of the company's asset retirement obligation
A reconciliation of the Company's liability, which the current portion is included in other accrued liabilities on the Consolidated Balance Sheets, for the years ended December 31 was as follows:
2022 2021 
(In thousands)
Balance at beginning of year$468,686 $446,919 
Liabilities incurred5,972 12,454 
Liabilities acquired 1,805 
Liabilities settled(9,646)(15,155)
Accretion expense*23,188 21,214 
Revisions in estimates(77,692)1,449 
Balance at end of year$410,508 $468,686 
*Includes $21.8 million and $19.6 million in 2022 and 2021, respectively, recorded to regulatory assets.