Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables disaggregate the Company’s coal revenues by product category and by market to depict how the nature, amount, timing, and uncertainty of the Company’s coal revenues and cash flows are affected by economic factors:

	Year Ended December 31, 2021
	Met Coal		Thermal Coal		Total
Export coal revenues	$	1,675,147	$	30,879	$	1,706,026
Domestic coal revenues	396,160		150,411		546,571
Total coal revenues	$	2,071,307	$	181,290	$	2,252,597

	Year Ended December 31, 2020
	Met Coal		Thermal Coal		Total
Export coal revenues	$	870,121	$	27,904	$	898,025
Domestic coal revenues	362,654		152,445		515,099
Total coal revenues	$	1,232,775	$	180,349	$	1,413,124

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied as of December 31, 2021.

	2022		2023		2024		2025		2026		Total
Estimated coal revenues (1)	$	65,768	$	14,199	$	—	$	—	$	—	$	79,967

(1) Amounts only include estimated coal revenues associated with contracts with customers with fixed pricing with original expected duration of more than one year. The Company has elected not to disclose the aggregate amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period for performance obligations with either of the following conditions: 1) the remaining performance obligation is part of a contract that has an original expected duration of one year or less; or 2) the remaining performance obligation has variable consideration that is allocated entirely to a wholly unsatisfied performance obligation.