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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2025

Commitments and Contingencies Disclosure [Abstract]

Schedule of Restricted Cash Deposits

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

			March 31, 2025						December 31, 2024
Workers’ compensation and black lung obligations			$	114,094					$	113,144
Reclamation-related obligations			1,199						697
Financial payments and other performance obligations			8,892						8,742
Total long-term restricted cash			$	124,185					$	122,583

Schedule of Restricted Investments and Deposit Assets

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

			March 31, 2025						December 31, 2024
Workers’ compensation obligations			$	3,134					$	3,119
Reclamation-related obligations			33,803						34,018
Financial payments and other performance obligations			6,023						5,994
Total restricted investments (1)			$	42,960					$	43,131

(1) Classified as long-term trading securities as of March 31, 2025 and December 31, 2024.

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

			March 31, 2025						December 31, 2024
Workers’ compensation obligations			$	4,108					$	4,108
Other operating agreements			845						866
Total deposits			4,953						4,974
Less current portion			—						(21)
Total deposits, net of current portion (1)			$	4,953					$	4,953

(1) Included within Other non-current assets on the Company’s Condensed Consolidated Balance Sheets.

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- References

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- Definition

Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs.

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- Definition

Tabular disclosure of cash and cash equivalents restricted as to withdrawal or usage.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(1)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-8

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