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Asset retirement obligations (Tables)
3 Months Ended
Mar. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligations And The Changes Due To Accretion Expense

The following table presents the balances for asset retirement obligations and the changes due to accretion expense (in thousands):

 

 

 

March 31, 2022

 

 

December 31, 2021

 

Asset retirement obligations, beginning of period

 

$

34,929

 

 

$

33,499

 

Accretion expense

 

 

367

 

 

 

1,430

 

Asset retirement obligations, end of period

 

$

35,296

 

 

$

34,929