Contingencies (Tables)

12 Months Ended

Dec. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Contingencies Reserve Balance

For the years ended December 31, 2024, 2023 and 2022, the following undiscounted activity was recorded in connection with the New Idria Mercury Mine:

	For the Year Ended December 31,
	2024			2023			2022
Beginning reserve balance	$	13,182		$	11,855		$	8,213
Changes in estimated environmental liability		3,100			6,500			4,400
Payments made (1) (4)		(3,857	)		(5,173	)		(758	)
Ending reserve balance (2)	$	12,425		$	13,182		$	11,855
Beginning receivable balance	$	7,245		$	6,000		$	—
Changes in estimated insurance recovery		3,300			3,300			6,000
Insurance recovery reimbursements		(2,141	)		(2,055	)		—
Ending receivable balance (3)	$	8,404		$	7,245		$	6,000

(1) Payments made in the years ended December 31, 2022 were offset by insurance refunds of $0.8 million. In the fourth quarter of 2022, Buckhorn reached an agreement with respect to certain insurance coverage related to defense costs for which recovery of accrued costs are recorded as a receivable to the extent such recovery is determined to be probable under this agreement.

(2) As of December 31, 2024, Buckhorn has a total ending reserve balance of $12.4 million related to the New Idria Mine, of which $6.5 million is classified in Other current liabilities and $5.9 million in Other liabilities (long-term).

(3) As of December 31, 2024, Buckhorn has a total receivable balance related to the probable insurance recovery of $8.4 million, of which $3.9 million is classified in Other accounts receivable and $4.5 million is classified in Other (long-term).

(4) Payments made for the year ended December 31, 2023 include a $1.9 million payment related to a settlement agreement with the EPA to resolve the past costs claim, which Buckhorn paid in the first quarter of 2023.