Contingencies (Tables)

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Contingencies Reserve Balance

the following activity was recorded in connection with the New Idria Mercury Mine:

	For the Quarter Ended March 31,
	2024			2023
Beginning reserve balance	$	13,182		$	11,855
Changes in estimated environmental liability		—			1,600
Payments made (3)		(867	)		(2,731	)
Ending reserve balance (1)	$	12,315		$	10,724
Beginning receivable balance	$	7,245		$	6,000
Changes in estimated insurance recovery		300			1,100
Insurance recovery reimbursements		(525	)		(876	)
Ending receivable balance (2)	$	7,020		$	6,224

(1) As of March 31, 2024, Buckhorn has a total ending reserve balance of $12.3 million related to the New Idria Mine, of which $6.2 million is classified in Other current liabilities and $6.1 million in Other liabilities (long-term).

(2) As of March 31, 2024, Buckhorn has a total receivable balance related to the probable insurance recovery of $7.0 million, of which $2.9 million

is classified in Other accounts receivable and $4.1 million is classified in Other (long-term).

(3) Payments made for the three months ended March 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.