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Asset Retirement Obligations (Tables)
 6 Months Ended
Jun. 30, 2024
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Changes in Asset Retirement Obligation Liabilities
The components of the changes in the asset retirement obligation liabilities were:
(Dollars in thousands)Short-Term
Portion		Long-Term
Portion		Total
Balance as of December 31, 2023$206 $7,191 $7,397 
Accretion295 54 349 
Amounts paid(247)— (247)
Reclassifications48 (48)— 
Balance as of June 30, 2024$302 $7,197 $7,499