v3.25.2
Contingencies - Schedule of Contingencies Reserve Balance (Details) - New Idria Mercury Mine [Member] - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Loss Contingencies [Line Items]        
Beginning reserve balance $ 11,719 $ 12,315 $ 12,425 $ 13,182
Changes in estimated environmental liability 0 800 0 800
Payments made (478) (623) (1,184) (1,490)
Ending reserve balance [1] 11,241 12,492 11,241 12,492
Beginning receivable balance 7,487 7,020 8,404 7,245
Changes in estimated insurance recovery 0 700 0 1,000
Insurance recovery reimbursements (437) (606) (1,354) (1,131)
Ending receivable balance [2] $ 7,050 $ 7,114 $ 7,050 $ 7,114
[1]

(1) As of June 30, 2025, Buckhorn has a total ending reserve balance of $11.2 million related to the New Idria Mine, of which $6.4 million is classified in Other current liabilities and $4.8 million in Other liabilities (long-term).
[2]

(2) As of June 30, 2025, Buckhorn has a total receivable balance related to the probable insurance recovery of $7.0 million, of which $2.8 million is classified in Other accounts receivable and $4.2 million is classified in Other assets (long-term).