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Asset Retirement Obligations (Tables)
 9 Months Ended
Sep. 30, 2022
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 at December 31, 2021$130 $6,355 $6,485 
Accretion103 407 510 
Amounts paid(214)— (214)
Reclassifications128 (128)— 
Balance at September 30, 2022$147 $6,634 $6,781