​

​

Nine Months Ended September 30, 

​

  ​ ​ ​

2026

  ​ ​ ​

2025

Contingent decommissioning obligations, beginning of period

​

$

36,157

​

$

22,551

Liabilities settled

​

(4,772)

​

(1,660)

Accrual for additional estimated liabilities

​

—

​

13,659

Contingent decommissioning obligations, end of period

​

​

31,385

​

​

34,550

Less: Current portion

​

(17,534)

​

(759)

Long-term

​

$

13,851

​

$

33,791