Commitment and Contingencies (Tables)

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Restrictions on Cash and Cash Equivalents

Amounts included in restricted cash provide collateral to secure the following obligations:

	December 31,
	2022		2021
Workers’ compensation and black lung obligations	$	15,334	$	70,637
Reclamation-related obligations	3,220		10,449
Financial payments and other performance obligations	10,387		8,340
Contingent Revenue Obligation escrow	24,547		11,977
Total restricted cash	$	53,488	$	101,403
Less current portion	(24,547)		(11,977)
Restricted cash, net of current portion	$	28,941	$	89,426

Prepaid Expenses and Other Current Assets

Amounts included in restricted investments provide collateral to secure the following obligations:

	December 31,
	2022		2021
Workers’ compensation and black lung obligations	$	72,136	$	2,716
Reclamation-related obligations	31,718		26,225
Financial payments and other performance obligations	1,881		2,008
Total restricted investments (1)	$	105,735	$	30,949

(1) Classified as trading securities as of December 31, 2022 and 2021.

Amounts included in deposits provide collateral to secure the following obligations:

	December 31,
	2022		2021
Reclamation-related obligations	$	102	$	118
Financial payments and other performance obligations	391		403
Other operating agreements (1)	85,618		1,275
Total deposits (2)	$	86,111	$	1,796

(1) Includes $84,748 related to the Company’s dividend payable. Refer to Note 9 for additional information.

(2) Included within Short-term deposits and Other non-current assets on the Company’s Consolidated Balance Sheets.