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Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2026

Commitments and Contingencies Disclosure [Abstract]

Schedule of Restricted Cash Deposits

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

			June 30, 2026						December 31, 2025
Workers’ compensation and black lung obligations			$	118,045					$	117,150
Reclamation-related obligations			1,294						959
Financial payments and other performance obligations			8,880						8,802
Total long-term restricted cash			$	128,219					$	126,911

Schedule of Restricted Investments and Deposit Assets

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

			June 30, 2026						December 31, 2025
Workers’ compensation obligations			$	3,168					$	3,172
Reclamation-related obligations			27,268						27,238
Financial payments and other performance obligations			4,017						3,946
Total long-term restricted investments (1)			$	34,453					$	34,356

(1) Classified as long-term trading securities as of June 30, 2026 and December 31, 2025.

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

			June 30, 2026						December 31, 2025
Workers’ compensation obligations			$	4,108					$	4,108
Other operating agreements			683						684
Total deposits			4,791						4,792
Less current portion			(29)						—
Total deposits, net of current portion (1)			$	4,762					$	4,792

(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/2003/role/recommendedDisclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-8

Reference 2: 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

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