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Asset Retirement Obligations (Tables)
 6 Months Ended
Jun. 30, 2025
Asset Retirement Obligations  
Schedule of asset retirement obligations The following table describes the changes in our AROs (in thousands):

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2025

    

2024

AROs at January 1,

​

$

62,947

​

$

61,356

Accretion expense

​

 

2,847

​

 

2,794

AROs at June 30, 

​

$

65,794

​

$

64,150

​