Revenue

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Disaggregation of Revenue from Contracts with Customers

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:

	Three Months Ended September 30, 2020
	Met		Thermal		Total
Export coal revenues	$	202,339	$	6,707	$	209,046
Domestic coal revenues	84,675		106,233		190,908
Total coal revenues	$	287,014	$	112,940	$	399,954

	Three Months Ended September 30, 2019
	Met		Thermal		Total
Export coal revenues	$	248,628	$	13,187	$	261,815
Domestic coal revenues	137,146		125,026		262,172
Total coal revenues	$	385,774	$	138,213	$	523,987

	Nine Months Ended September 30, 2020
	Met		Thermal		Total
Export coal revenues	$	693,599	$	24,459	$	718,058
Domestic coal revenues	282,266		278,611		560,877
Total coal revenues	$	975,865	$	303,070	$	1,278,935

	Nine Months Ended September 30, 2019
	Met		Thermal		Total
Export coal revenues	$	928,390	$	39,569	$	967,959
Domestic coal revenues	429,457		387,359		816,816
Total coal revenues	$	1,357,847	$	426,928	$	1,784,775

Performance Obligations

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied as of September 30, 2020.

	Remainder of 2020		2021		2022		2023		2024		2025		Total
Estimated coal revenues	$	138,188	$	268,185	$	200,877	$	—	$	—	$	—	$	607,250