Contingencies (Tables)

12 Months Ended

Dec. 31, 2025

Commitments and Contingencies Disclosure [Abstract]

Schedule of Contingencies Reserve Balance

For the years ended December 31, 2025, 2024 and 2023, the following undiscounted activity was recorded in connection with the New Idria Mercury Mine:

	For the Year Ended December 31,
	2025			2024			2023
Beginning reserve balance	$	12,425		$	13,182		$	11,855
Changes in estimated environmental liability		2,500			3,100			6,500
Payments made (3)		(2,421	)		(3,857	)		(5,173	)
Ending reserve balance (1)	$	12,504		$	12,425		$	13,182
Beginning receivable balance	$	8,404		$	7,245		$	6,000
Changes in estimated insurance recovery		2,300			3,300			3,300
Insurance recovery reimbursements		(2,372	)		(2,141	)		(2,055	)
Ending receivable balance (2)	$	8,332		$	8,404		$	7,245

(1) As of December 31, 2025, Buckhorn has a total ending reserve balance of $12.5 million related to the New Idria Mine, of which $8.8 million is classified in Other current liabilities, $3.3 million in Other liabilities (long-term) and $0.4 million in Accounts payable.

(2) As of December 31, 2025, Buckhorn has a total receivable balance related to the probable insurance recovery of $8.3 million, of which $5.2 million is classified in Other accounts receivable and $3.1 million is classified in Other assets (long-term).

(3) 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.