10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

☒Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended September 30, 2021

or

☐Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from                      to                      .

Commission file number: 1-13105

Arch Resources, Inc.

(Exact name of registrant as specified in its charter)

Delaware	43-0921172
(State or other jurisdiction	(I.R.S. Employer
of incorporation or organization)	Identification Number)

One CityPlace Drive
Suite 300
St. Louis
Missouri	63141
(Address of principal executive offices)	(Zip code)
Registrant’s telephone number, including area code: (314) 994-2700 (Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading symbol	Name of each exchange on which registered
Common stock, $.01 par value	ARCH	New York Stock Exchange

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒  No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒  No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☒
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐  No ☒

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court. Yes ☒  No ☐

At October 18, 2021 there were 15,316,069 shares of the registrant’s common stock outstanding.

TABLE OF CONTENTS

	Page
Part I FINANCIAL INFORMATION	3
Item 1. Financial Statements	3
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3. Quantitative and Qualitative Disclosures About Market Risk	48
Item 4. Controls and Procedures	48
Part II OTHER INFORMATION	49
Item 1. Legal Proceedings	49
Item 1A. Risk Factors	49
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	49
Item 4. Mine Safety Disclosures	49
Item 6. Exhibits	50
Signatures	55

2

Part I

FINANCIAL INFORMATION

Item 1.Financial Statements.

Arch Resources, Inc. and Subsidiaries

Condensed Consolidated Statements of Operations

(in thousands, except per share data)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(Unaudited)				(Unaudited)
Revenues	$	594,412	$	382,261	$	1,402,345	$	1,107,014
Costs, expenses and other operating
Cost of sales (exclusive of items shown separately below)		423,826		345,539		1,089,061		1,036,886
Depreciation, depletion and amortization		30,760		32,630		84,441		94,105
Accretion on asset retirement obligations		5,437		4,947		16,311		14,939
Change in fair value of coal derivatives and coal trading activities, net		19,641		2,649		28,931		3,263
Selling, general and administrative expenses		21,081		21,541		66,679		64,024
Costs related to proposed joint venture with Peabody Energy		—		4,423		—		15,938
Asset impairment and restructuring		—		163,106		—		176,371
Gain on property insurance recovery related to Mountain Laurel longwall		—		—		—		(23,518)
Gain on divestitures		—		—		—		(1,369)
Other operating income, net		(1,731)		(4,894)		(11,344)		(16,768)
		499,014		569,941		1,274,079		1,363,871
Income (loss) from operations		95,398		(187,680)		128,266		(256,857)
Interest expense, net
Interest expense		(6,151)		(2,989)		(13,220)		(9,900)
Interest and investment income		—		459		474		3,511
		(6,151)		(2,530)		(12,746)		(6,389)
Income (loss) before nonoperating expenses		89,247		(190,210)		115,520		(263,246)
Nonoperating (expenses) income
Non-service related pension and postretirement benefit costs		(1,186)		(878)		(3,252)		(3,076)
Reorganization items, net		—		—		—		26
		(1,186)		(878)		(3,252)		(3,050)
Income (loss) before income taxes		88,061		(191,088)		112,268		(266,296)
Provision for (benefit from) income taxes		(1,082)		379		1,301		(206)
Net income (loss)	$	89,143	$	(191,467)	$	110,967	$	(266,090)
Net income (loss) per common share
Basic earnings (loss) per share	$	5.83	$	(12.64)	$	7.26	$	(17.57)
Diluted earnings (loss) per share	$	4.92	$	(12.64)	$	6.49	$	(17.57)
Weighted average shares outstanding
Basic weighted average shares outstanding		15,302		15,147		15,293		15,144
Diluted weighted average shares outstanding		18,105		15,147		17,101		15,144
Dividends declared per common share	$	—	$	—	$	—	$	0.50

The accompanying notes are an integral part of the condensed consolidated financial statements.

3

Arch Resources, Inc. and Subsidiaries

Condensed Consolidated Statements of Comprehensive Income (Loss)

(in thousands)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(Unaudited)					(Unaudited)
Net income (loss)	$	89,143	$	(191,467)	$	110,967	$	(266,090)
Derivative instruments
Comprehensive income (loss) before tax		299		476		1,626		(1,830)
Income tax benefit (provision)		—		—		—		—
		299		476		1,626		(1,830)
Pension, postretirement and other post-employment benefits
Comprehensive income (loss) before tax		2,189		4,164		6,698		(12,439)
Income tax benefit (provision)		—		—		—		—
		2,189		4,164		6,698		(12,439)
Available-for-sale securities
Comprehensive income (loss) before tax		135		(255)		220		(189)
Income tax benefit (provision)		—		—		—		—
		135		(255)		220		(189)
Total other comprehensive income (loss)		2,623		4,385		8,544		(14,458)
Total comprehensive income (loss)	$	91,766	$	(187,082)	$	119,511	$	(280,548)

The accompanying notes are an integral part of the condensed consolidated financial statements.

4

Arch Resources, Inc. and Subsidiaries

Condensed Consolidated Balance Sheets

(in thousands, except per share data)

	September 30, 2021		December 31, 2020
Assets	(Unaudited)
Current assets
Cash and cash equivalents	$	189,707	$	187,492
Short-term investments		20,084		96,765
Restricted cash		1,101		5,953
Trade accounts receivable (net of $0 allowance at September 30, 2021 and December 31, 2020)		226,206		110,869
Other receivables		3,573		3,053
Inventories		155,870		126,008
Other current assets		52,098		58,000
Total current assets		648,639		588,140
Property, plant and equipment, net		1,135,399		1,007,303
Other assets
Equity investments		80,016		71,783
Other noncurrent assets		66,895		55,246
Total other assets		146,911		127,029
Total assets	$	1,930,949	$	1,722,472
Liabilities and Stockholders' Equity
Current Liabilities
Accounts payable	$	102,025	$	103,743
Accrued expenses and other current liabilities		198,268		155,256
Current maturities of debt		138,587		31,097
Total current liabilities		438,880		290,096
Long-term debt		416,446		477,215
Asset retirement obligations		210,843		230,732
Accrued pension benefits		1,527		2,879
Accrued postretirement benefits other than pension		93,317		94,388
Accrued workers’ compensation		249,594		244,695
Other noncurrent liabilities		105,699		98,906
Total liabilities		1,516,306		1,438,911
Stockholders' equity
Common stock, $0.01 par value, authorized 300,000 shares, issued 25,394 and 25,323 shares at September 30, 2021 and December 31, 2020, respectively		254		253
Paid-in capital		779,013		767,484
Retained earnings		489,914		378,906
Treasury stock, 10,088 shares at September 30, 2021 and December 31, 2020, respectively, at cost		(827,381)		(827,381)
Accumulated other comprehensive loss		(27,157)		(35,701)
Total stockholders’ equity		414,643		283,561
Total liabilities and stockholders’ equity	$	1,930,949	$	1,722,472

The accompanying notes are an integral part of the condensed consolidated financial statements.

5

Arch Resources, Inc. and Subsidiaries

Condensed Consolidated Statements of Cash Flows

(in thousands)

	Nine Months Ended September 30,
	2021		2020
Operating activities		(Unaudited)
Net income (loss)	$	110,967	$	(266,090)
Adjustments to reconcile to cash from operating activities:
Depreciation, depletion and amortization		84,441		94,105
Accretion on asset retirement obligations		16,311		14,939
Deferred income taxes		11		14,227
Employee stock-based compensation expense		12,841		13,907
Amortization relating to financing activities		4,801		3,189
Gain on property insurance recovery related to Mountain Laurel longwall		—		(23,518)
Gain on disposals and divestitures, net		(857)		(3,460)
Reclamation work completed		(36,200)		(10,423)
Non-cash asset impairment and restructuring		—		163,088
Changes in:
Receivables		(115,858)		47,416
Inventories		(29,862)		(12,499)
Accounts payable, accrued expenses and other current liabilities		12,827		(50,474)
Income taxes, net		1,247		22,855
Other		30,913		48,652
Cash provided by operating activities		91,582		55,914
Investing activities
Capital expenditures		(212,046)		(205,661)
Minimum royalty payments		(1,186)		(1,186)
Proceeds from disposals and divestitures		1,135		856
Purchases of short-term investments		—		(76,593)
Proceeds from sales of short-term investments		81,986		148,670
Investments in and advances to affiliates, net		(2,723)		(1,549)
Proceeds from property insurance recovery related to Mountain Laurel longwall		—		23,518
Cash used in investing activities		(132,834)		(111,945)
Financing activities
Payments on term loan		(2,250)		(2,250)
Proceeds from equipment financing		19,438		53,611
Proceeds from tax exempt bonds		44,985		53,090
Net payments on other debt		(20,208)		(19,347)
Debt financing costs		(2,057)		(3,528)
Dividends paid		—		(7,645)
Payments for taxes related to net share settlement of equity awards		(1,293)		(346)
Cash provided by financing activities		38,615		73,585
(Decrease) increase in cash and cash equivalents, including restricted cash		(2,637)		17,554
Cash and cash equivalents, including restricted cash, beginning of period	$	193,445	$	153,020
Cash and cash equivalents, including restricted cash, end of period	$	190,808	$	170,574
Cash and cash equivalents, including restricted cash, end of period
Cash and cash equivalents	$	189,707	$	156,655
Restricted Cash		1,101		13,919
	$	190,808	$	170,574

The accompanying notes are an integral part of the condensed consolidated financial statements.

6

Arch Resources, Inc. and Subsidiaries

Condensed Consolidated Statements of Stockholders’ Equity

(Unaudited)

							Treasury		Accumulated Other
	Common		Paid-In				Stock at		Comprehensive
	Stock		Capital		Retained Earnings		Cost		Income (loss)		Total
	(In thousands)
Balances, January 1, 2021	$	253	$	767,484	$	378,906	$	(827,381)	$	(35,701)	$	283,561
Total comprehensive income (loss)		—		—		(6,042)		—		1,337		(4,705)
Employee stock-based compensation		—		3,885		18		—		—		3,903
Issuance of 59,166 shares of common stock under long-term incentive plan		1		—		—		—		—		1
Common stock withheld related to net share settlement of equity awards		—		(1,317)		—		—		—		(1,317)
Balances at March 31, 2021	$	254	$	770,052	$	372,882	$	(827,381)	$	(34,364)	$	281,443
Total comprehensive income (loss)		—		—		27,866		—		4,584		32,450
Employee stock-based compensation		—		4,613		23		—		—		4,636
Balances at June 30, 2021	$	254	$	774,665	$	400,771	$	(827,381)	$	(29,780)	$	318,529
Total comprehensive income (loss)		—		—		89,143		—		2,623		91,766
Employee stock-based compensation		—		4,343		—		—		—		4,343
Warrants exercised		—		5		—		—		—		5
Balances at September 30, 2021	$	254	$	779,013	$	489,914	$	(827,381)	$	(27,157)	$	414,643

The accompanying notes are an integral part of the condensed consolidated financial statements.

7

Arch Resources, Inc. and Subsidiaries

Condensed Consolidated Statements of Stockholders’ Equity

(Unaudited)

							Treasury		Accumulated Other
	Common		Paid-In				Stock at		Comprehensive
	Stock		Capital		Retained Earnings		Cost		Income (loss)		Total
	(In thousands)
Balances, January 1, 2020	$	252	$	730,551	$	731,425	$	(827,381)	$	5,689	$	640,536
Dividends on common shares ($0.50/share)		—		—		(7,834)		—		—		(7,834)
Total comprehensive income (loss)		—		—		(25,299)		—		(17,403)		(42,702)
Employee stock-based compensation		—		3,962		—		—		—		3,962
Common stock withheld related to net share settlement of equity awards		—		(198)		—		—		—		(198)
Balances at March 31, 2020	$	252	$	734,315	$	698,292	$	(827,381)	$	(11,714)	$	593,764
Total comprehensive income (loss)		—		—		(49,324)		—		(1,440)		(50,764)
Employee stock-based compensation		—		4,891		—		—		—		4,891
Common stock withheld related to net share settlement of equity awards		—		(50)		—		—		—		(50)
Dividend Equivalents earned on RSU grants		—		—		(59)		—		—		(59)
Balances at June 30, 2020	$	252	$	739,156	$	648,909	$	(827,381)	$	(13,154)	$	547,782
Total comprehensive income (loss)		—		—		(191,467)		—		4,385		(187,082)
Employee stock-based compensation		—		4,971		—		—		—		4,971
Common stock withheld related to net share settlement of equity awards		—		(15)		—		—		—		(15)
Dividend Equivalents earned on RSU grants		—		—		(10)		—		—		(10)
Balances at September 30, 2020	$	252	$	744,112	$	457,432	$	(827,381)	$	(8,769)	$	365,646

The accompanying notes are an integral part of the condensed consolidated financial statements.

8

Arch Resources, Inc. and Subsidiaries

Notes to Condensed Consolidated Financial Statements

(unaudited)

1. Basis of Presentation

The accompanying unaudited condensed consolidated financial statements include the accounts of Arch Resources, Inc. (“Arch Resources”) and its subsidiaries (“Arch” or the “Company”). Unless the context indicates otherwise, the terms “Arch” and the “Company” are used interchangeably in this Quarterly Report on Form 10-Q. The Company’s primary business is the production of metallurgical and thermal coal from underground and surface mines located throughout the United States, for sale to steel producers, utility companies, and industrial accounts both in the United States and around the world. The Company currently operates mining complexes in West Virginia, Wyoming and Colorado. All subsidiaries are wholly owned. Intercompany transactions and accounts have been eliminated in consolidation.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial reporting and U.S. Securities and Exchange Commission regulations. In the opinion of management, all adjustments, consisting of normal, recurring accruals considered necessary for a fair presentation, have been included. Results of operations for the three and nine months ended September 30, 2021 are not necessarily indicative of results to be expected for the year ending December 31, 2021. These financial statements should be read in conjunction with the audited financial statements and related notes as of and for the year ended December 31, 2020 included in the Company’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission.

2. Accounting Policies

Recently Adopted Accounting Guidance

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting." The amendments provide optional guidance for a limited time to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference the London interbank offered rate (“LIBOR”) or another reference rate expected to be discontinued due to reference rate reform. These amendments are effective immediately and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. We are currently evaluating our contracts and the optional expedients provided by the new standard.

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes.” ASU 2019-12 eliminates certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The ASU is effective for public companies for fiscal years beginning after December 15, 2020, and interim periods therein with early adoption permitted. The Company adopted this ASU with minimal impact to the Company’s financial statements.

Recent Accounting Guidance Issued Not Yet Effective

In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40)—Accounting for Convertible Instruments and Contracts in an Entity's Own Equity.  ASU 2020-06 reduces the number of accounting models for convertible debt instruments and convertible preferred stock. For convertible instruments with conversion features that are not required to be accounted for as derivatives under Topic 815, Derivatives and Hedging, or that do not result in substantial premiums accounted for as paid-in capital, the embedded conversion features no longer are separated from

9

the host contract.  ASU 2020-06 also removes certain conditions that should be considered in the derivatives scope exception evaluation under Subtopic 815-40, Derivatives and Hedging—Contracts in Entity’s Own Equity, and clarify the scope and certain requirements under Subtopic 815-40.  In addition, ASU 2020-06 improves the guidance related to the disclosures and earnings-per-share (EPS) for convertible instruments and contract in entity’s own equity.  ASU 2020-06 is effective for public business entities that meet the definition of a Securities and Exchange Commission (SEC) filer, excluding entities eligible to be smaller reporting companies as defined by the SEC, for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The FASB specified that an entity should adopt the guidance as of the beginning of its annual fiscal year.  The Company is currently evaluating the impact this ASU will have on its consolidated financial statements.

3. Joint Venture with Peabody Energy

The Company incurred expenses of $4.4 million and $15.9 million for the three and nine months ended September 30, 2020, respectively, associated with the regulatory approval process related to the proposed joint venture with Peabody that was terminated jointly by the parties due to the Federal Trade Commission blocking the joint venture during the third quarter of 2020. No amounts related to the joint venture were incurred for the three and nine months ended September 30, 2021.

4. Gain on Property Insurance Recovery Related to Mountain Laurel Longwall

The Company recorded a gain of $23.5 million related to a property insurance recovery at its Mountain Laurel operation during the nine months ended September 30, 2020. As a result of geologic conditions in the final longwall panel, Mountain Laurel was unable to recover 123 of the longwall system’s 176 hydraulic shields. No amounts related to the property insurance recovery were incurred for the three and nine months ended September 30, 2021.

5. Asset Impairment and Restructuring

During the third quarter of 2020, the Company determined that indicators of impairment existed with respect to certain of its thermal long-lived assets. As a result, the Company recorded impairment charges during both the three and nine months ended September 30, 2020 of $51.8 million related to the Coal Creek Mine, $33.5 million related to the Viper Mine, $41.6 million related to the West Elk Mine, and $36.2 million related to the Company’s equity method investment in Knight Hawk Holdings, LLC. No amounts related to asset impairment were incurred for the three and nine months ended September 30, 2021.

The Company recorded $13.3 million of employee severance expense related to a voluntary separation plan that was accepted by 53 members of the corporate staff and 201 employees from the Company’s thermal operations during the three and nine months ended September 30, 2020. No amounts related to the employee severance expense were incurred for the three and nine months ended September 30, 2021.

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6. Accumulated Other Comprehensive Income (Loss)

The following items are included in accumulated other comprehensive income (loss) (“AOCI”), net of tax:

			Pension,
			Postretirement				Accumulated
			and Other Post-				Other
	Derivative		Employment		Available-for-		Comprehensive
	Instruments		Benefits		Sale Securities		Income (loss)
	(In thousands)
Balance at December 31, 2020	$	(3,891)	$	(31,459)	$	(351)	$	(35,701)
Unrealized losses		35		6,429		245		6,709
Amounts reclassified from accumulated other comprehensive income (loss)		1,591		269		(25)		1,835
Balances at September 30, 2021	$	(2,265)	$	(24,761)	$	(131)	$	(27,157)

The following amounts were reclassified out of AOCI:

	Three Months Ended September 30,				Nine Months Ended September 30,				Line Item in the Condensed Consolidated
Details About AOCI Components	2021		2020		2021		2020		Statements of Operations
	(In thousands)
Coal hedges	$	—	$	98	$	—	$	294	Revenues
Interest rate hedges		(336)		(638)		(1,591)		(1,502)	Interest expense
		—		—		—		—	Provision for (benefit from) income taxes
	$	(336)	$	(540)	$	(1,591)	$	(1,208)	Net of tax
Pension, postretirement and other post-employment benefits
Amortization of actuarial gains (losses), net 1	$	(590)	$	(138)	$	(1,772)	$	328	Non-service related pension and postretirement benefit (costs) credits
Amortization of prior service credits		52		30		139		84	Non-service related pension and postretirement benefit (costs) credits
Pension settlement		376		437		1,364		567	Non-service related pension and postretirement benefit (costs) credits
		—		—		—		—	Provision for (benefit from) income taxes
	$	(162)	$	329	$	(269)	$	979	Net of tax
Available-for-sale securities 2	$	(1)	$	128	$	25	$	140	Interest and investment income
		—		—		—		—	Provision for (benefit from) income taxes
	$	(1)	$	128	$	25	$	140	Net of tax

¹ Production-related benefits and workers’ compensation costs are included in costs to produce coal.

² The gains and losses on sales of available-for-sale-securities are determined on a specific identification basis.

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7. Inventories

Inventories consist of the following:

	September 30,		December 31,
	2021		2020
	(In thousands)
Coal	$	74,422	$	49,436
Repair parts and supplies		81,448		76,572
	$	155,870	$	126,008

The repair parts and supplies are stated net of an allowance for slow-moving and obsolete inventories of $0.8 million at September 30, 2021 and $0.6 million at December 31, 2020.

8. Investments in Available-for-Sale Securities

The Company has invested in marketable debt securities, primarily highly liquid U.S. Treasury securities and investment grade corporate bonds. These investments are held in the custody of a major financial institution. These securities are classified as available-for-sale securities and, accordingly, the unrealized gains and losses are recorded through other comprehensive income.

The Company’s investments in available-for-sale marketable securities are as follows:

	September 30, 2021
			Gross					Allowance
			Unrealized					for - Credit	Fair
	Cost Basis		Gains		Losses			Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	6,075	$	—	$	(33)	$	—	$	6,042
Corporate notes and bonds		14,140		—		(98)		—		14,042
Total Investments	$	20,215	$	—	$	(131)	$	—	$	20,084

	December 31, 2020
			Gross					Allowance
			Unrealized					for - Credit	Fair
	Cost Basis		Gains			Losses		Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	57,299	$	11	$	(86)	$	—	$	57,224
Corporate notes and bonds		39,817		1		(277)		—		39,541
Total Investments	$	97,116	$	12	$	(363)	$	—	$	96,765

The aggregate fair value of investments with unrealized losses that were owned for less than a year was $2.0 million and $45.3 million at September 30, 2021 and December 31, 2020, respectively. The aggregate fair value of investments with unrealized losses that were owned for over a year was $18.1 million and $8.1 million at September 30, 2021 and December 31, 2020, respectively. The unrealized losses in the Company’s portfolio at September 30, 2021 are the result of normal market fluctuations. The Company does not currently intend to sell these investments before recovery of their amortized cost base.

The debt securities outstanding at September 30, 2021 have maturity dates ranging from the fourth quarter of 2021 through the first quarter of 2022. The Company classifies its investments as current based on the nature of the investments and their availability to provide cash for use in current operations.

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9. Derivatives

Interest rate risk management

The Company has entered into interest rate swaps to reduce the variability of cash outflows associated with interest payments on its variable rate term loan. These swaps have been designated as cash flow hedges. For additional information on these arrangements, see Note 11, “Debt and Financing Arrangements,” in the Condensed Consolidated Financial Statements.

Diesel fuel price risk management

The Company is exposed to price risk with respect to diesel fuel purchased for use in its operations. The Company anticipates purchasing approximately 35 to 40 million gallons of diesel fuel for use in its operations during 2021. To protect the Company’s cash flows from increases in the price of diesel fuel for its operations, the Company uses forward physical diesel purchase contracts and purchased heating oil call options. At September 30, 2021, the Company had no heating oil call options outstanding.

Coal price risk management positions

The Company may sell or purchase forward contracts, swaps and options in the over-the-counter coal market in order to manage its exposure to coal prices. The Company has exposure to the risk of fluctuating coal prices related to forecasted, index-priced sales or purchases of coal or to the risk of changes in the fair value of a fixed price physical sales contract. Certain derivative contracts may be designated as hedges of these risks.

At September 30, 2021, the Company held derivatives for risk management purposes that are expected to settle in the following years:

(Tons in thousands)	2021	2022	Total
Coal sales	338	33	371
Coal purchases	31	33	64

Coal trading positions

The Company may sell or purchase forward contracts, swaps and options in the over-the-counter coal market for trading purposes. The Company is exposed to the risk of changes in coal prices on the value of its coal trading portfolio. The unrecognized gains of $0.1 million in the trading portfolio are expected to be realized during the remainder of 2021.

Tabular derivatives disclosures

The Company has master netting agreements with all of its counterparties which allow for the settlement of contracts in an asset position with contracts in a liability position in the event of default or termination. Such netting arrangements reduce the Company’s credit exposure related to these counterparties. For classification purposes, the Company records the net fair value of all the positions with a given counterparty as a net asset or liability in the Condensed Consolidated Balance Sheets. The amounts shown in the table below represent the fair value position of individual contracts, and not the net position presented in the accompanying Condensed Consolidated Balance Sheets.

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The fair value and location of derivatives reflected in the accompanying Condensed Consolidated Balance Sheets are as follows:

	September 30, 2021						December 31, 2020
Fair Value of Derivatives	Asset		Liability				Asset		Liability
(In thousands)	Derivative		Derivative				Derivative		Derivative
Derivatives Designated as Hedging Instruments
Coal	$	—	$	—			$	—	$	—
Derivatives Not Designated as Hedging Instruments
Heating oil -- diesel purchases		—		—				237		—
Coal -- held for trading purposes		7,768		(7,688)				1,914		(1,595)
Coal -- risk management		3,233		(31,874)				1,094		(804)
Total	$	11,001	$	(39,562)			$	3,245	$	(2,399)
Total derivatives	$	11,001	$	(39,562)			$	3,245	$	(2,399)
Effect of counterparty netting		(11,001)		11,001				(2,392)		2,392
Net derivatives as classified in the balance sheets	$	—	$	(28,561)	$	(28,561)	$	853	$	(7)	$	846

		September 30,		December 31,
		2021		2020
Net derivatives as reflected on the balance sheets (in thousands)
Heating Oil and coal	Other current assets	$	—	$	853
Coal	Accrued expenses and other current liabilities		(28,561)		(7)
		$	(28,561)	$	846

The Company had a current asset representing cash collateral posted to a margin account for derivative positions primarily related to coal derivatives of $25.1 million and $1.4 million at September 30, 2021 and December 31, 2020, respectively. These amounts are not included with the derivatives presented in the table above and are included in “other current assets” in the accompanying Condensed Consolidated Balance Sheets.

The effects of derivatives on measures of financial performance are as follows:

Derivatives Used in Cash Flow Hedging Relationships (in thousands)

Three Months Ended September 30,

		Gain (Loss) Recognized in Other Comprehensive Income				Gains (Losses) Reclassified from Other Comprehensive Income into Income
		2021		2020		2021		2020
Coal sales	(1)	$	—	$	(25)	$	—	$	(569)
Coal purchases	(2)		—		25		—		471
Totals		$	—	$	—	$	—	$	(98)

At September 30, 2021, the Company did not have any derivative contracts designated as hedging instruments.

Derivatives Not Designated as Hedging Instruments (in thousands)

Three Months Ended September 30,

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		Gain (Loss) Recognized
			2021		2020
Coal  trading — realized and unrealized	(3)	$	—	$	1
Coal risk management — unrealized	(3)		(19,641)		(2,650)
Change in fair value of coal derivatives and coal trading activities, net total		$	(19,641)	$	(2,649)
Coal risk management— realized	(4)	$	(6,495)	$	2,593
Heating oil — diesel purchases	(4)	$	—	$	(184)

Location in statement of operations:

(1) — Revenues

(2) — Cost of sales

(3) — Change in fair value of coal derivatives and coal trading activities, net

(4) — Other operating (income) expense, net

Derivatives Used in Cash Flow Hedging Relationships (in thousands)

Nine Months Ended September 30,

		Gain (Loss) Recognized in Other Comprehensive Income				Gains (Losses) Reclassified from Other Comprehensive Income into Income
		2021		2020		2021		2020
Coal sales	(1)	$	—	$	574	$	—	$	(1,471)
Coal purchases	(2)		—		(570)		—		1,177
Totals		$	—	$	4	$	—	$	(294)

At September 30, 2021, the Company did not have any derivative contracts designated as hedging instruments.

Derivatives Not Designated as Hedging Instruments (in thousands)

Nine Months Ended September 30,

		Gain (Loss) Recognized
		2021		2020
Coal trading— realized and unrealized	(3)	$	—	$	222
Coal risk management— unrealized	(3)		(28,931)		(3,561)
Natural gas trading — realized and unrealized	(3)		—		76
Change in fair value of coal derivatives and coal trading activities, net total		$	(28,931)	$	(3,263)
Coal risk management — realized	(4)	$	(7,008)	$	6,950
Heating oil — diesel purchases	(4)	$	—	$	(889)

Location in statement of operations:

(1) — Revenues

(2) — Cost of sales

(3) — Change in fair value of coal derivatives and coal trading activities, net

(4) — Other operating (income) expense, net

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10. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consist of the following:

	September 30,		December 31,
	2021		2020
	(In thousands)
Payroll and employee benefits	$	59,655	$	39,443
Taxes other than income taxes		54,130		56,232
Interest		4,346		2,795
Workers’ compensation		13,860		15,259
Asset retirement obligations		27,032		27,032
Coal derivatives		28,561		7
Other		10,684		14,488
	$	198,268	$	155,256

11. Debt and Financing Arrangements

	September 30,		December 31,
	2021		2020
	(In thousands)
Term loan due 2024 ($286.5 million face value)	$	285,943	$	288,033
Tax Exempt Bonds ($98.1 million face value)		98,075		53,090
Convertible Debt ($155.3 million face value)		119,979		115,367
Other		61,995		62,695
Debt issuance costs		(10,959)		(10,873)
		555,033		508,312
Less: current maturities of debt		138,587		31,097
Long-term debt	$	416,446	$	477,215

Term Loan Facility

In 2017, the Company entered into a senior secured term loan credit agreement in an aggregate principal amount of $300 million (the “Term Loan Debt Facility”) with Credit Suisse AG, Cayman Islands Branch, as administrative agent and collateral agent, and the other financial institutions from time to time party thereto (collectively, the “Lenders”). The Term Loan Debt Facility was issued at 99.50% of the face amount and will mature on March 7, 2024. The term loans provided under the Term Loan Debt Facility (the “Term Loans”) are subject to quarterly principal amortization payments in an amount equal to $750,000. The interest rate on the Term Loan Debt Facility is, at the option of Arch Resources, either (i) LIBOR plus an applicable margin of 2.75%, subject to a 1.00% LIBOR floor, or (ii) a base rate plus an applicable margin of 1.75%.

The Term Loan Debt Facility is guaranteed by all existing and future wholly owned domestic subsidiaries of the Company (collectively, the “Subsidiary Guarantors” and, together with Arch Resources, the “Loan Parties”), subject to customary exceptions, and is secured by first priority security interests on substantially all assets of the Loan Parties, including 100% of the voting equity interests of directly owned domestic subsidiaries and 65% of the voting equity interests of directly owned foreign subsidiaries, subject to customary exceptions.

Accounts Receivable Securitization Facility

On September 30, 2020, the Company amended and extended its existing trade accounts receivable securitization facility provided to Arch Receivable Company, LLC, a special-purpose entity that is a wholly owned subsidiary of Arch Resources (“Arch Receivable”) (the “Securitization Facility”), which supports the issuance of letters of credit and requests for cash advances. The amendment to the Securitization Facility reduced the size of the facility from $160 million to $110 million of borrowing capacity and extended the maturity date to September 29, 2023.

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Under the Securitization Facility, Arch Receivable, Arch Resources and certain of Arch Resources’s subsidiaries party to the Securitization Facility have granted to the administrator of the Securitization Facility a first priority security interest in eligible trade accounts receivable generated by such parties from the sale of coal and all proceeds thereof. As of September 30, 2021, letters of credit totaling $61.2 million were outstanding under the facility with $30.5 million available for borrowings.

Inventory-Based Revolving Credit Facility

On September 30, 2020, Arch Resources amended the senior secured inventory-based revolving credit facility in an aggregate principal amount of $50 million (the “Inventory Facility”) with Regions Bank (“Regions”) as administrative agent and collateral agent, as lender and swingline lender (in such capacities, the “Lender”) and as letter of credit issuer. Availability under the Inventory Facility is subject to a borrowing base consisting of (i) 85% of the net orderly liquidation value of eligible coal inventory, plus (ii) the lesser of (x) 85% of the net orderly liquidation value of eligible parts and supplies inventory and (y) 35% of the amount determined pursuant to clause (i), plus (iii) 100% of Arch Resources’s Eligible Cash (defined in the Inventory Facility), subject to reduction for reserves imposed by Regions.

The amendment of the Inventory Facility extended the maturity of the facility to September 29, 2023; eliminated the provision that accelerated maturity upon Liquidity (as defined in the Inventory Facility) falling below a specified level; and reduced the minimum Liquidity requirement from $175 million to $100 million. Additionally, the amendment included provisions that reduce the advance rates for coal inventory and parts and supplies, depending on “Liquidity” as defined as of any date of determination, the sum of, without duplication, (a) unrestricted cash or Permitted Investments as of such date of the Parent and its Subsidiaries (other than the Securitization Subsidiaries and Bonding Subsidiaries) that are not Foreign Subsidiaries, (b) withdrawable funds from brokerage accounts of Borrowers as of such date, (c) Availability as of such date, and (d) any unused commitments that are available to be drawn as of such date by the Parent pursuant to the terms of any Permitted Receivables Financing.

The Inventory Facility contains certain customary affirmative and negative covenants; events of default, subject to customary thresholds and exceptions; and representations, including certain cash management and reporting requirements that are customary for asset-based credit facilities. The Inventory Facility also includes a requirement to maintain Liquidity equal to or exceeding $100 million at all times. As of September 30, 2021, letters of credit totaling $27.7 million were outstanding under the facility with $13.3 million available for borrowings.

Equipment Financing

On March 4, 2020, the Company entered into an equipment financing arrangement accounted for as debt. The Company received $53.6 million in exchange for conveying an interest in certain equipment in operation at its Leer Mine and entered into a master lease arrangement for that equipment. The financing arrangement contains customary terms and events of default and provides for 48 monthly payments with an average interest rate of 6.34% maturing on March 4, 2024. Upon maturity, all interests in the subject equipment will revert back to the Company.

On July 29, 2021, the Company entered into an additional equipment financing arrangement accounted for as debt. The Company received $23.5 million in exchange for conveying an interest in certain equipment in operation at its Powder River Basin operations and entered into a master lease arrangement for that equipment. The financing arrangement contains customary terms and events of default and provides for 42 monthly payments with an average implied interest rate of 7.35% maturing on February 1, 2025. Upon maturity, the Company will have the option to purchase the equipment.

Tax Exempt Bonds

On July 2, 2020, the West Virginia Economic Development Authority (the “Issuer”) issued $53.1 million aggregate principal amount of Solid Waste Disposal Facility Revenue Bonds (Arch Resources Project), Series 2020 (the “Tax Exempt Bonds”) pursuant to an Indenture of Trust dated as of June 1, 2020 (the “Indenture of Trust”) between the Issuer and Citibank, N.A., as trustee (the “Trustee”). On March 4, 2021, the Issuer issued an additional $45.0 million of Series 2021 Tax Exempt Bonds. The proceeds of the Tax Exempt Bonds were loaned to the Company pursuant to a Loan Agreement dated as of June 1, as supplemented by a First Amendment to Loan Agreement dated as of March 1, 2021

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(collectively, the “Loan Agreement”), each between the Issuer and the Company. The Tax Exempt Bonds are payable solely from payments to be made by the Company under the Loan Agreement as evidenced by a Note from the Company to the Trustee. The proceeds of the Tax Exempt Bonds are being used to finance certain costs of the acquisition, construction, reconstruction, and equipping of solid waste disposal facilities at the Company’s Leer South development, and for capitalized interest and certain costs related to issuance of the Tax Exempt Bonds.

The Tax Exempt Bonds will bear interest payable each January 1 and July 1, commencing January 1, 2021 for the Series 2020 and July 1, 2021 for the Series 2021, and have a final maturity of July 1, 2045; however, the Tax Exempt Bonds are subject to mandatory tender on July 1, 2025 at a purchase price equal to 100% of the principal amount of the Tax Exempt Bonds, plus accrued interest to July 1, 2025. The Series 2020 and Series 2021 Tax Exempt Bonds bear interest of 5% and 4.125%, respectively.

The Tax Exempt Bonds are subject to redemption (i) in whole or in part at any time on or after January 1, 2025 at the option of the Issuer, upon the Company’s direction at a redemption price of par, plus interest accrued to the redemption date; and (ii) at par plus interest accrued to the redemption date from certain excess Tax Exempt Bonds proceeds as further described in the Indenture of Trust.

The Company’s obligations under the Loan Agreement are (i) except as otherwise described below, secured by first priority liens on and security interests in substantially all of the Company’s and Subsidiary Guarantors’ real property and other assets, subject to certain customary exceptions and permitted liens, and in any event excluding our accounts receivable and inventory; and (ii) jointly and severally guaranteed by the Subsidiary Guarantors, subject to customary exceptions.

The collateral securing the Company’s obligations under the Loan Agreement is substantially the same as the collateral securing the obligations under the Term Loan Debt Facility other than with respect to variances in certain real property collateral. The real property securing the Company’s obligations under the Loan Agreement includes a subset of the real property collateral securing the obligations under the Term Loan Debt Facility and includes only mortgages on substantially all of the Company’s revenue generating real property and assets.

The Loan Agreement contains certain affirmative covenants and representations, including but not limited to: (i) maintenance of a rating on the Tax Exempt Bonds; (ii) maintenance of proper books of records and accounts; (iii) agreement to add additional guarantors to guarantee the obligations under the Loan Agreement in certain circumstances; (iv) procurement of customary insurance; and (v) preservation of legal existence and certain rights, franchises, licenses and permits. The Loan Agreement also contains certain customary negative covenants, which, among other things, and subject to certain exceptions, include restrictions on (i) release of collateral securing the Company’s obligations under the Loan Agreement; (ii) mergers and consolidations and disposition of assets, and (iii) restrictions on actions that may jeopardize the tax-exempt status of the Tax Exempt Bonds.

The Loan Agreement contains customary events of default, subject to customary thresholds and exceptions, including, among other things: (i) nonpayment of principal, purchase price, interest and other fees (subject to certain cure periods); (ii) bankruptcy or insolvency proceedings relating to us; (iii) material inaccuracy of a representation or warranty at the time made; (iv) cross-events of default to indebtedness of at least $50 million; and (v) cross defaults to the Indenture of Trust, the guaranty related to the Tax Exempt Bonds or any related security documents.

As of September 30, 2021, the Company has utilized the total Tax Exempt Bond proceeds.

Convertible Debt

On November 3, 2020, the Company issued $155.3 million in aggregate principal amount of 5.25% convertible senior notes due 2025 (“Convertible Notes ” or “Convertible Debt”). The net proceeds from the issuance of the Convertible Notes, after deducting offering related costs of $5.1 million and cost of a “Capped Call Transaction” as defined below of $17.5 million, were approximately $132.7 million. The Convertible Notes bear interest at the annual rate of 5.25%, payable semiannually in arrears on May 15 and November 15 of each year, beginning on May 15, 2021, and will mature on November 15, 2025, unless earlier converted, redeemed or repurchased by the Company.

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The Convertible Notes are convertible into cash, shares of the Company’s common stock or a combination thereof, at the Company’s election, at an initial conversion rate of 26.7917 shares of common stock per $1,000 principal amount of Convertible Notes, which is equivalent to an initial conversion price of approximately $37.325 per share, subject to adjustment pursuant to the terms of the indenture governing the Convertible Notes (the "Indenture"). Before July 15, 2025, noteholders will have the right to convert their Convertible Notes only upon the occurrence of certain events. From and after July 15, 2025, noteholders may convert their Convertible Notes at any time until the close of business on the second scheduled trading day immediately before the maturity date.

The conversion rate of the Convertible Notes may be adjusted in certain circumstances, including in connection with a conversion of the Convertible Notes made following certain fundamental changes and under other circumstances set forth in the Indenture. It is the Company’s current intent and policy to settle any conversions of notes through a combination of cash and shares.

The Convertible Notes will be redeemable, in whole and not part, at the Company’s option at any time on or after November 20, 2023 and on or before the 40th scheduled trading day immediately before the maturity date, at a cash redemption price equal to the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date, but only if the last reported sale price per share of the Company’s common stock exceeds 130% of the conversion price on: (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company sends the related redemption notice; and (ii) the trading day immediately before the date the Company sends such notice. In addition, calling the Convertible Notes for redemption will constitute a Make-Whole Fundamental Change, which will result in an increase to the conversion rate in certain circumstances for a specified period of time. No sinking fund is provided for the Convertible Notes.

During the third quarter of 2021, the common stock sale condition of the Convertible Notes was satisfied. As described in the Indenture, this condition is satisfied when the closing stock price exceeds 130% of the conversion price of $37.325 per share for at least 20 trading days of the last 30 trading days prior to quarter end. As a result, the Convertible Notes are currently convertible at the election of noteholders during the fourth quarter. Due to the Company’s stated intent to settle the principal value in cash, the liability portion of $120.0 million of the Convertible Notes was included in current maturities of debt on the Company’s Condensed Consolidated Balance Sheet at September 30, 2021.

As of September 30, 2021, all of the Convertible Notes remained outstanding. In addition, from October 1, 2021 to the date of this filing, the Company has not received any conversion requests for Convertible Notes and does not anticipate receiving any conversion requests in the near term as the market value of the Convertible Notes exceeds the conversion value of the Convertible Notes. As of September 30, 2021, the if-converted value of the Convertible Notes exceeded the principal amount by $230.5 million.

Total interest expense related to the Convertible Debt for the three months ended September 30, 2021 was $3.8 million and was comprised of $2.0 million related to the contractual interest coupon and $1.8 million related to the amortization of the discount on the liability component. Total interest expense related to the Convertible Debt for the nine months ended September 30, 2021 was $11.2 million and was comprised of $6.1 million related to the contractual interest coupon and $5.1 million related to the amortization of the discount on the liability component.

Capped Call Transactions

In connection with the offering of the Convertible Notes, the Company entered into privately negotiated convertible note hedge transactions (collectively, the “Capped Call Transactions”). The Capped Call Transactions cover, subject to customary anti-dilution adjustments, the number of shares of the Company’s common stock that initially underlie the Convertible Notes.

The Capped Call Transactions are expected generally to reduce the potential dilution and/or offset any cash payments the Company is required to make in excess of the principal amount due upon conversion of the Convertible

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Notes in the event that the market price of the Company’s common stock is greater than the strike price of the Capped Call Transactions, which was initially $37.325 per share (subject to adjustment under the terms of the Capped Call Transactions). The strike price of $37.325 corresponds to the initial conversion price of the Convertible Notes. The number of shares underlying the Capped Call Transactions is 4.2 million.

The cap price of the Capped Call Transactions is $52.2550 per share, which represents a premium of 75% over the last reported sale price of the Company’s common stock on October 29, 2020. The cost of the Capped Call Transactions was approximately $17.5 million.

The Capped Call Transactions are separate transactions, in each case entered into between the Company and the respective Option Counterparty, and are not part of the terms of the Convertible Notes and will not affect any holder’s rights under the Convertible Notes. Holders of the Convertible Notes will not have any rights with respect to the Capped Call Transactions. Additionally, the cost of the Capped Call Transactions is not expected to be tax deductible as the Company did not elect to integrate the Capped Call Transactions into the notes for tax purposes.

Accounting Treatment of the Convertible Notes and Related Hedge Transactions

As the Capped Call Transactions meet certain accounting criteria, the Capped Call Transactions were classified as equity and are not accounted for as derivatives. The proceeds from the offering of the Convertible Notes were separated into liability and equity components. On the date of issuance, the liability and equity components of the Convertible Notes were calculated to be approximately $114.5 million and $40.8 million, respectively. The initial $114.5 million liability component was determined based on the fair value of similar debt instruments excluding the conversion feature assuming a hypothetical interest rate of 12.43%. The inputs and assumptions used in the calculated fair value of the liability component of the convertible debt fall within Level 2 of the fair value hierarchy. The initial $40.8 million equity component represents the difference between the fair value of the initial $114.5 million in debt and the $155.3 million of gross proceeds. The equity component is included in additional paid-in capital in the Condensed Consolidated Balance Sheets and will not be subsequently remeasured as long as it continues to meet the conditions for equity classification. The related initial debt discount of $40.8 million is being amortized over the life of the Convertible Notes as non-cash interest expense using the effective interest method.

In connection with the above-noted transactions, the Company incurred approximately $5.9 million of debt issuance costs. These offering expenses were allocated to the liability and equity components in proportion to the allocation of proceeds and accounted for as debt and equity issuance costs, respectively. The Company allocated $4.4 million of debt issuance costs to the liability component, which were capitalized as deferred financing costs within long-term debt. These costs are being amortized as interest expense over the term of the debt (which coincides with the five year life of the Convertible Notes) using the effective interest method. The remaining $1.5 million of transaction costs allocated to the equity component were recorded as a reduction of the equity component.

Interest Rate Swaps

The Company has entered into a series of interest rate swaps to fix a portion of the LIBOR interest payments due under the Term Loan Debt Facility. The interest rate swaps qualify for cash flow hedge accounting treatment and as such, the change in the fair value of the interest rate swaps is recorded on the Company’s Condensed Consolidated Balance Sheet as an asset or liability with the effective portion of the gains or losses reported as a component of accumulated other comprehensive income and the ineffective portion reported in earnings. As interest payments are made on the Term Loan, amounts in accumulated other comprehensive income will be reclassified into earnings through interest expense to reflect a net interest on the Term Loan equal to the effective yield of the fixed rate of the swap plus 2.75% which is the spread on the revised Term Loan. In the event that an interest rate swap is terminated prior to maturity, gains or losses in accumulated other comprehensive income will remain deferred and be reclassified into earnings in the periods which the hedged forecasted transaction affects earnings.

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Below is a summary of the Company’s outstanding interest rate swap agreements designated as hedges as of September 30, 2021:

Notional Amount
(in millions)		Effective Date	Fixed Rate		Receive Rate	Expiration Date
$	100.0	June 30, 2021	2.315	%	1-month LIBOR	June 30, 2023

The fair value of the interest rate swaps at September 30, 2021 is a liability of $2.3 million, which is recorded within Other noncurrent liabilities, with the offset to accumulated other comprehensive income on the Company’s Condensed Consolidated Balance Sheet. The Company realized $0.3 million and $1.6 million of losses during the three and nine months ended September 30, 2021, respectively, related to settlements of the interest rate swaps, which were recorded to interest expense on the Company’s Condensed Consolidated Statement of Operations. The interest rate swaps are classified as Level 2 within the fair value hierarchy.

12. Income Taxes

A reconciliation of the federal income tax provision at the statutory rate to the actual provision for (benefit from) income taxes follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Income tax provision (benefit) at statutory rate	$	18,493	$	(40,128)	$	23,576	$	(55,922)
Percentage depletion and other perm items		(3,357)		2,242		(6,313)		(3,358)
State taxes, net of effect of federal taxes		944		(2,695)		1,832		(4,197)
Change in valuation allowance		(15,984)		40,734		(18,814)		61,115
Current expense associated with uncertain tax positions		(1,128)		226		1,081		3,327
AMT sequestration refund		—		—		—		(1,171)
Other, net		(50)		—		(61)		—
Provision for (benefit from) income taxes	$	(1,082)	$	379	$	1,301	$	(206)

13. Fair Value Measurements

The hierarchy of fair value measurements assigns a level to fair value measurements based on the inputs used in the respective valuation techniques. The levels of the hierarchy, as defined below, give the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs.

● Level 1 is defined as observable inputs such as quoted prices in active markets for identical assets. Level 1 assets include U.S. Treasury securities, U.S. government agency securities, and coal swaps and futures that are submitted for clearing on the New York Mercantile Exchange.

● Level 2 is defined as observable inputs other than Level 1 prices. These include quoted prices for similar assets or liabilities in an active market, quoted prices for identical assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. The Company’s Level 2 assets and liabilities include Corporate debt securities, coal commodity contracts, and interest rate swaps with fair values derived from quoted prices in over-the-counter markets or from prices received from direct broker quotes.

● Level 3 is defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. These include the Company’s commodity option contracts (coal, natural gas and heating oil) valued using modeling techniques, such as Black-Scholes, that require the use of inputs, particularly volatility, that are rarely observable.

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The table below sets forth, by level, the Company’s financial assets and liabilities that are recorded at fair value in the accompanying Condensed Consolidated Balance Sheet:

	September 30, 2021
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Investments in marketable securities	$	20,084	$	6,042	$	14,042	$	—
Derivatives		—		—		—		—
Total assets	$	20,084	$	6,042	$	14,042	$	—
Liabilities:
Derivatives	$	30,826	$	6,336	$	24,490	$	—

The Company’s contracts with its counterparties allow for the settlement of contracts in an asset position with contracts in a liability position in the event of default or termination. For classification purposes, the Company records the net fair value of all the positions with these counterparties as a net asset or liability. Each level in the table above displays the underlying contracts according to their classification in the accompanying Condensed Consolidated Balance Sheet, based on this counterparty netting.

There were no financial instruments categorized as Level 3 instruments at September 30, 2021.

Fair Value of Long-Term Debt

At September 30, 2021 and December 31, 2020, the fair value of the Company’s debt, including amounts classified as current, was $815.2 million and $533.8 million, respectively. Fair values are based upon observed prices in an active market, when available, or from valuation models using market information, which fall into Level 2 in the fair value hierarchy.

14. Earnings (Loss) per Common Share

The Company computes basic net income (loss) per share using the weighted average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the weighted average number of common shares and the effect of potentially dilutive securities outstanding during the period. Potentially dilutive securities may consist of warrants, restricted stock units or other contingently issuable shares. The dilutive effect of outstanding warrants, restricted stock units, convertible debt, and other contingently issuable shares is reflected in diluted earnings per share by application of the treasury stock method. The weighted average share impact of warrants and restricted stock units that were excluded from the calculation of diluted shares due to the Company incurring a net loss for the three and nine months ending September 30, 2020 were 178,333 and 169,555 shares, respectively.

The following table provides the basic and diluted earnings per share by reconciling the denominators of the computations:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2021	2020	2021	2020
(In Thousands)
Weighted average shares outstanding:
Basic weighted average shares outstanding	15,302	15,147	15,293	15,144
Effect of dilutive securities	2,803	—	1,808	—
Diluted weighted average shares outstanding	18,105	15,147	17,101	15,144

The Company expects to settle the principal amount of Convertible Notes in cash, but settle the conversion premium in shares. As a result, only the amount by which the conversion value exceeds the aggregate principal amount of the Convertible Debt (the “conversion premium”) is considered in the diluted earnings per share calculation. The conversion premium has a potentially dilutive effect on diluted net income per share when the average market price of the

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Company’s common stock for a given period exceeds the initial conversion price of $37.325 per share for the Convertible Notes. The Company calculates the number of shares needed to satisfy the conversion premium by using an average monthly stock price for each month; and the resulting dilutive impact for the three months ended is 1,915,000 shares and 1,338,444 shares nine months ended September 30, 2021.

The Capped Call Transaction is anti-dilutive and is excluded from the calculation of diluted earnings per share.

15. Workers Compensation Expense

The Company is liable under the Federal Mine Safety and Health Act of 1969, as subsequently amended, to provide for pneumoconiosis (occupational disease) benefits to eligible employees, former employees and dependents. The Company currently provides for federal claims principally through a self-insurance program. The Company is also liable under various state workers’ compensation statutes for occupational disease benefits. The occupational disease benefit obligation represents the present value of the actuarially computed present and future liabilities for such benefits over the employees’ applicable years of service.

In October 2019, the Company filed an application with the Office of Workers’ Compensation Programs (“OWCP”) within the Department of Labor for reauthorization to self-insure federal black lung benefits. In February 2020, the Company received a reply from the OWCP confirming Arch’s status to remain self-insured contingent upon posting additional collateral of $71.1 million within 30 days of receipt of the letter. The Company is currently appealing the ruling from the OWCP and has received an extension to self-insure during the appeal process. The Company is evaluating alternatives to self-insurance, including the purchase of commercial insurance to cover these claims.

In addition, the Company is liable for workers’ compensation benefits for traumatic injuries which are calculated using actuarially-based loss rates, loss development factors and discounted based on a risk free rate. Traumatic workers’ compensation claims are insured with varying retentions/deductibles, or through state-sponsored workers’ compensation programs.

Workers’ compensation expense consists of the following components:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Self-insured occupational disease benefits:
Service cost	$	1,949	$	1,892	$	5,847	$	5,674
Interest cost(1)		1,110		1,398		3,330		4,196
Net amortization(1)		590		297		1,772		892
Total occupational disease	$	3,649	$	3,587	$	10,949	$	10,762
Traumatic injury claims and assessments		1,779		2,030		5,449		6,312
Total workers’ compensation expense	$	5,428	$	5,617	$	16,398	$	17,074

(1) In accordance with the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” these costs are recorded within Nonoperating expenses in the Condensed Consolidated Statement of Operations on the line item “Non-service related pension and postretirement benefit costs.”

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16. Employee Benefit Plans

The following table details the components of pension benefit costs (credits):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Interest cost(1)	$	1,099	$	1,255	$	3,234	$	4,342
Expected return on plan assets(1)		(1,812)		(2,022)		(5,460)		(6,333)
Pension settlement(1)		(376)		(437)		(1,364)		(567)
Amortization of prior service costs (credits) (1)		(52)		(27)		(139)		(83)
Net benefit credit	$	(1,141)	$	(1,231)	$	(3,729)	$	(2,641)

The following table details the components of other postretirement benefit costs:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Service cost	$	86	$	104	$	256	$	316
Interest cost(1)		529		543		1,585		1,849
Amortization of other actuarial losses (gains)(1)		—		(160)		—		(1,219)
Net benefit cost	$	615	$	487	$	1,841	$	946

(1) In accordance with the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” these costs are recorded within Nonoperating expenses in the Condensed Consolidated Statement of Operations on the line item “Non-service related pension and postretirement benefit costs.”

(1)

17. Commitments and Contingencies

The Company accrues for costs related to contingencies when a loss is probable and the amount is reasonably determinable. Disclosure of contingencies is included in the financial statements when it is at least reasonably possible that a material loss or an additional material loss in excess of amounts already accrued may be incurred.

The Company is a party to numerous claims and lawsuits with respect to various matters. The ultimate resolution of any such legal matter could result in outcomes that may be materially different from amounts the Company has accrued for such matters. The Company believes it has recorded adequate reserves for these matters.

18. Segment Information

On December 31, 2020, the Company sold its Viper operation. As a result, the Company revised its reportable segments beginning in the first quarter of 2021 to reflect the manner in which the chief operating decision maker (CODM) views the Company’s businesses going forward for purposes of reviewing performance, allocating resources and assessing future prospects and strategic execution. Prior to the first quarter of 2021, the Company had three reportable segments: MET, Powder River Basin (PRB), and Other Thermal. After the divestment of Viper, the Company has three remaining active thermal mines: West Elk, Black Thunder, and Coal Creek. With two distinct lines of business, metallurgical and thermal, the movement to two segments aligns with how the Company makes decisions and allocates resources. No changes were made to the MET Segment and the three remaining thermal mines are now reported as the “Thermal Segment”. The prior periods have been restated to reflect the change in reportable segments.

The Company’s reportable business segments are based on two distinct lines of business, metallurgical and thermal, and may include a number of mine complexes. The Company manages its coal sales by market, not by individual mining complex. Geology, coal transportation routes to customers, and regulatory environments also have a significant impact on the Company’s marketing and operations management. Mining operations are evaluated based on Adjusted EBITDA,

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per-ton cash operating costs (defined as including all mining costs except depreciation, depletion, amortization, accretion on asset retirement obligations, and pass-through transportation expenses, divided by segment tons sold), and on other non-financial measures, such as safety and environmental performance. Adjusted EBITDA is not a measure of financial performance in accordance with generally accepted accounting principles, and items excluded from Adjusted EBITDA are significant in understanding and assessing the Company’s financial condition. Therefore, Adjusted EBITDA should not be considered in isolation, nor as an alternative to net income (loss), income (loss) from operations, cash flows from operations or as a measure of our profitability, liquidity or performance under generally accepted accounting principles. The Company uses Adjusted EBITDA to measure the operating performance of its segments and allocate resources to the segments. Furthermore, analogous measures are used by industry analysts and investors to evaluate the Company’s operating performance. Investors should be aware that the Company’s presentation of Adjusted EBITDA may not be comparable to similarly titled measures used by other companies. The Company reports its results of operations primarily through the following reportable segments: Metallurgical (MET) segment, containing the Company’s metallurgical operations in West Virginia, and the Thermal segment containing the Company’s thermal operations in Wyoming and Colorado.

Reporting segment results for the three and nine months ended September 30, 2021 and 2020 are presented below. The Corporate, Other, and Eliminations grouping includes these charges: idle operations; change in fair value of coal

derivatives and coal trading activities, net; corporate overhead; land management activities; other support functions; and the elimination of intercompany transactions.

					Corporate,
					Other and
(In thousands)	MET		Thermal		Eliminations		Consolidated
Three Months Ended September 30, 2021
Revenues	$	295,291	$	299,096	$	25	$	594,412
Adjusted EBITDA		118,548		52,737		(39,690)		131,595
Depreciation, depletion and amortization		25,041		5,488		231		30,760
Accretion on asset retirement obligation		508		4,419		510		5,437
Total assets		965,252		193,060		772,637		1,930,949
Capital expenditures		61,504		507		2,078		64,089
Three Months Ended September 30, 2020
Revenues	$	168,054	$	213,299	$	908	$	382,261
Adjusted EBITDA		12,407		31,616		(26,597)		17,426
Depreciation, depletion and amortization		24,221		8,150		259		32,630
Accretion on asset retirement obligation		486		3,842		619		4,947
Total assets		759,202		216,708		677,427		1,653,337
Capital expenditures		57,424		568		(892)		57,100
Nine Months Ended September 30, 2021
Revenues	$	693,522	$	707,394	$	1,429	$	1,402,345
Adjusted EBITDA		221,391		107,589		(99,962)		229,018
Depreciation, depletion and amortization		68,577		15,170		694		84,441
Accretion on asset retirement obligation		1,523		13,256		1,532		16,311
Total assets		965,252		193,060		772,637		1,930,949
Capital expenditures		204,347		1,370		6,329		212,046
Nine Months Ended September 30, 2020
Revenues	$	489,660	$	597,887	$	19,467	$	1,107,014
Adjusted EBITDA		76,037		19,600		(76,028)		19,609
Depreciation, depletion and amortization		69,028		23,310		1,767		94,105
Accretion on asset retirement obligation		1,458		11,526		1,955		14,939
Total assets		759,202		216,708		677,427		1,653,337
Capital expenditures		193,586		9,381		2,694		205,661

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A reconciliation of net income (loss) to adjusted EBITDA and segment Adjusted EBITDA from coal operations follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2021		2020		2021		2020
Net income (loss)	$	89,143	$	(191,467)	$	110,967	$	(266,090)
Provision for (benefit from) income taxes		(1,082)		379		1,301		(206)
Interest expense, net		6,151		2,530		12,746		6,389
Depreciation, depletion and amortization		30,760		32,630		84,441		94,105
Accretion on asset retirement obligations		5,437		4,947		16,311		14,939
Costs related to proposed joint venture with Peabody Energy		—		4,423		—		15,938
Asset impairment and restructuring		—		163,106		—		176,371
Gain on property insurance recovery related to Mountain Laurel longwall		—		—		—		(23,518)
Gain on divestitures		—		—		—		(1,369)
Non-service related pension and postretirement benefit costs		1,186		878		3,252		3,076
Reorganization items, net		—		—		—		(26)
Adjusted EBITDA	$	131,595	$	17,426	$	229,018	$	19,609
EBITDA from idled or otherwise disposed operations		3,074		2,896		10,637		10,691
Selling, general and administrative expenses		21,081		21,541		66,679		64,024
Other		15,535		2,160		22,646		1,313
Segment Adjusted EBITDA from coal operations	$	171,285	$	44,023	$	328,980	$	95,637

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19. Revenue Recognition

ASC 606-10-50-5 requires that entities disclose disaggregated revenue information in categories (such as type of good or service, geography, market, type of contract, etc.) that depict how the nature, amount, timing, and uncertainty of revenue and cash flow are affected by economic factors. ASC 606-10-55-89 explains that the extent to which an entity’s revenue is disaggregated depends on the facts and circumstances that pertain to the entity’s contracts with customers and that some entities may need to use more than one type of category to meet the objective for disaggregating revenue.

In general, the Company’s business segmentation is aligned according to the nature and economic characteristics of its coal and customer relationships and provides meaningful disaggregation of each segment’s results. The Company has further disaggregated revenue between North America and Seaborne revenues which depicts the pricing and contract differences between the two. North America revenue is characterized by contracts that typically have a term of one year or longer and typically the pricing is fixed; whereas Seaborne revenue generally is derived by spot or short term contracts with pricing determined at the time of shipment or based on a market index.

					Corporate,
					Other and
	MET		Thermal		Eliminations		Consolidated
	(in thousands)
Three Months Ended September 30, 2021
North America revenues	$	52,654	$	247,955	$	25	$	300,634
Seaborne revenues		242,637		51,141		—		293,778
Total revenues	$	295,291	$	299,096	$	25	$	594,412
Three Months Ended September 30, 2020
North America revenues	$	47,197	$	208,273	$	908	$	256,378
Seaborne revenues		120,857		5,026		—		125,883
Total revenues	$	168,054	$	213,299	$	908	$	382,261
Nine Months Ended September 30, 2021
North America revenues	$	124,782	$	612,406	$	1,429	$	738,617
Seaborne revenues		568,740		94,988		—		663,728
Total revenues	$	693,522	$	707,394	$	1,429	$	1,402,345
Nine Months Ended September 30, 2020
North America revenues	$	117,058	$	579,380	$	19,467	$	715,905
Seaborne revenues		372,602		18,507		—		391,109
Total revenues	$	489,660	$	597,887	$	19,467	$	1,107,014

As of September 30, 2021, the Company has outstanding performance obligations for the remainder of 2021 of 20 million tons of fixed price contracts and 2.2 million tons of variable price contracts. Additionally, the Company has outstanding performance obligations beyond 2021 of approximately 91.2 million tons of fixed price contracts and 4.2 million tons of variable price contracts.

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20. Leases

The Company has operating and financing leases for mining equipment, office equipment, office space and transloading terminals with remaining lease terms ranging from less than one year to approximately six years. Some of these leases include both lease and non-lease components which are accounted for as a single lease component as the Company has elected the practical expedient to combine these components for all leases. As most of the leases do not provide an implicit rate, the Company calculated the “right-of-use” (“ROU”) assets and lease liabilities using its secured incremental borrowing rate at the lease commencement date.

As of September 30, 2021 and December 31, 2020, the Company had the following ROU assets and lease liabilities within the Company’s Condensed Consolidated Balance Sheets:

		September 30,		December 31,
		2021		2020
Assets	Balance Sheet Classification
Operating lease right-of-use assets	Other noncurrent assets	$	15,127	$	17,069
Financing lease right-of-use assets	Other noncurrent assets		4,539		5,512
Total Lease Assets		$	19,666	$	22,581
Liabilities	Balance Sheet Classification
Financing lease liabilities - current	Accrued expenses and other current liabilities	$	902	$	860
Operating lease liabilities - current	Accrued expenses and other current liabilities		2,515		2,454
Financing lease liabilities - long-term	Other noncurrent liabilities		4,332		5,014
Operating lease liabilities - long-term	Other noncurrent liabilities		13,272		15,278
		$	21,021	$	23,606
Weighted average remaining lease term in years
Operating leases			5.25
Finance leases			3.50
Weighted average discount rate
Operating leases			5.5%
Finance leases			6.4%

Information related to leases was as follows:

		Three Months Ended September 30,					Nine Months Ended September 30,
		2021		2020			2021		2020
	(In thousands)					(In thousands)
Operating lease information:
Operating lease cost		$	841	$	846		$	2,533	$	2,774
Operating cash flows from operating leases			865		860			2,551		2,787
Financing lease information:
Financing lease cost		$	393	$	393		$	1,179	$	1,179
Operating cash flows from financing leases			303		303			909		909

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Future minimum lease payments under non-cancellable leases as of September 30, 2021 were as follows:

	Operating		Finance
Year	Leases		Leases
	(In thousands)
2021	$	816	$	303
2022		3,317		1,210
2023		3,285		1,210
2024		3,200		1,210
2025		3,185		2,111
Thereafter		4,613		—
Total minimum lease payments	$	18,416	$	6,044
Less imputed interest		(2,629)		(810)
Total lease liabilities	$	15,787	$	5,234

21. Subsequent Event

On October 26, 2021, the Company announced the initiation of a $0.25 per share quarterly dividend. The first dividend payment of approximately $3.8 million will be made to shareholders of record as of November 30, 2021, payable on December 15, 2021.

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Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Unless the context otherwise requires, all references in this report to “Arch”, “we”, “us”, or “our” are to Arch Resources, Inc. and its subsidiaries.

Cautionary Notice Regarding Forward-Looking Statements

This report contains “forward-looking statements” - that is, statements related to future, not past, events. In this context, forward-looking statements often address our expected future business and financial performance, and often contain words such as “should,” “appears,” “expects,” “anticipates,” “intends,” “plans,” “believes,” “seeks,” or “will.” Forward-looking statements by their nature address matters that are, to different degrees, uncertain. For us, particular uncertainties arise from the COVID-19 pandemic, including its adverse effects on businesses, economies, and financial markets worldwide; from the impact of COVID-19 on efficiency, costs and production; from changes in the demand for our coal by the steel production and electricity generation industries; from our ability to access the capital markets on acceptable terms and conditions; from policy, legislation and regulations relating to the Clean Air Act, greenhouse gas emissions, incentives for alternative energy sources, and other environmental initiatives; from competition within our industry and with producers of competing energy sources; from our ability to successfully acquire or develop coal reserves, including the integration of our Leer South mine and its ramp up to full production levels; from operational, geological, permit, labor, transportation, and weather-related factors; from the effects of foreign and domestic trade policies, actions or disputes; from fluctuations in the amount of cash we generate from operations, which could impact, among other things, our ability to service our outstanding indebtedness and fund capital expenditures; from our ability to successfully integrate the operations that we acquire; from our ability to generate significant revenue to make payments required by, and to comply with restrictions related to, our indebtedness, including our ability to repurchase our Convertible Notes; from additional demands for credit support by third parties; from the loss of, or significant reduction in, purchases by our largest customers; from the development of future technology to replace coal with hydrogen in the steelmaking process; and from numerous other matters of national, regional and global scale, including those of a political, economic, business, competitive or regulatory nature. These uncertainties may cause our actual future results to be materially different than those expressed in our forward-looking statements. We do not undertake to update our forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by law. For a description of some of the risks and uncertainties that may affect our future results, you should see the “Risk Factors” in Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2020 and subsequent Form 10-Q filings.

COVID-19

In the first quarter of 2020, COVID-19 emerged as a global pandemic. The continuing responses to the COVID-19 outbreak include actions that have a significant impact on domestic and global economies, including travel restrictions, gathering bans, stay at home orders, and many other restrictive measures. All of our operations have been classified as essential in the states in which we operate. We instituted many policies and procedures, in alignment with CDC guidelines along with state and local mandates, to protect our employees during the COVID-19 outbreak. These policies and procedures included, but were not limited to, staggering shift times to limit the number of people in common areas at one time, limiting meetings and meeting sizes, continual cleaning and disinfecting of high touch and high traffic areas, including door handles, bathrooms, bathhouses, access elevators, mining equipment, and other areas, limiting contractor access to our properties, limiting business travel, and instituting work from home for administrative employees. During the third quarter of 2021, vaccination rates among our workforce began to level off in alignment with national and local trends. Furthermore, with the advent of the Delta variant, infection rates among our workforce increased at certain operations, in alignment with national and local trends, and we reinstated stricter protocols at these operations. During the third quarter of 2021, over thirty unit production shifts in our metallurgical segment were adversely impacted by staffing shortfalls related to increased COVID-19 case rates, and our requisite quarantine protocols. We continue to encourage vaccination among our workforce and adjust our COVID-19 responses. We continually evaluate our policies and procedures, in accordance with CDC, state, and local guidelines, and make any necessary adjustments to respond to the particular circumstances in the areas in which we operate.

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We recognize that the COVID-19 outbreak and responses thereto also continue to impact both our customers and suppliers. To date, we have not had any significant issues with critical suppliers, and we continue to communicate with them and closely monitor their developments to ensure we have access to the goods and services required to maintain our operations. Our customers have reacted, and continue to react, in various ways and to varying degrees to changes in demand for their products. Our current view of our customer demand situation is discussed in greater detail in the “Overview” section below.

Overview

Our results for the third quarter of 2021 benefited from continued improvement in metallurgical and thermal coal markets. During the third quarter of 2021, global economic growth continued to accelerate as pent up demand from the responses to the global pandemic seeks to be fulfilled. Global steel production appears to currently exceed pre-pandemic levels. At the same time, increased COVID-19 cases in certain coal producing jurisdictions, particularly Mongolia, have constrained coking coal supply, and a wetter than normal rainy season in Indonesia, has constrained thermal coal supply. Furthermore, global supply chain constraints, COVID-19 related and otherwise, have restricted hydrocarbon supplies across the energy sector. Through the third quarter of 2021, supply chain constraints have had a relatively minor impact on our shipment volumes, although we did have two coking coal vessels that we planned to ship late in the third quarter, delayed to early in the fourth quarter. If rail or vessel supply chain constraints increased in our areas of operation, our future results could be negatively impacted.

During the third quarter of 2021, accelerating global economic growth, historically high steel prices, and production and supply chain constraints, combined to drive international coking coal indices to historically high levels. Despite historically high coking coal prices, North American coking coal supply remains constrained compared to pre-COVID-19 levels. Some new supplies have been added to the market, in particular, our new Leer South longwall operation that will be ramping up production throughout the fourth quarter of 2021. Still, some of the high cost coking coal mine idlings announced during 2020 remain in place, and more recent supply disruptions also constrain supply. The duration of specific supply disruptions is unknown. We believe that under investment in the sector in recent years underlies the current market situation. In the current environment, we expect coking coal prices to be volatile. Longer term, we believe continued limited global capital investment in new coking coal production capacity, normal reserve depletion, and continuing economic growth will provide support to coking coal markets.

During the fourth quarter of 2020, a major political dispute that manifested itself as a trade dispute escalated between China, a major importer of coking coal, and Australia, the world’s largest exporter of coking coal. Specifically, China has effectively banned the import of coking coal and thermal coal, among other export products, from Australia. Historical trade patterns remain disrupted, and new trade patterns have emerged in the international coking coal markets. Indices for United States (US) East Coast coking coal continued to increase during the third quarter of 2021, as strong demand, particularly from China, has had a positive impact on these markets. Australian Premium Low Volatile (“PLV”) coking coal indices have also increased to historic levels as demand outside of China has increased though Australian export volumes remain below pre-pandemic levels. Recently, China has announced plans to reduce steel production. This planned reduction has not yet impacted coking coal prices, but depending on the magnitude of the reduction, could put pressure on all international coking coal indices.

Domestic thermal coal consumption increased in the third quarter of 2021, compared to the third quarter of 2020, due to significantly increased natural gas prices and continuing economic recovery from the responses to COVID-19. Longer term, we continue to believe thermal coal demand will remain pressured by continuing increases in subsidized renewable generation sources, particularly wind and solar, and planned retirements of coal fueled generating facilities. Currently, however; the significant increase in natural gas prices has led to an increase in coal fired generation. We believe coal generator stockpiles likely declined significantly during the current quarter, and domestic thermal coal indices have reached historically high levels. Importantly, this increase in domestic prices has allowed us to place significant volumes of domestic term business at prices meaningfully higher than seen prior to the third quarter of 2021. During the third quarter of 2021, international thermal coal market pricing increased to historical highs that economically support exports from our thermal operations. We continue to layer in additional thermal export commitments for the current year and 2022.

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On September 29, 2020, the U.S. District Court ruled against our proposal with Peabody to form a joint venture that would have combined our Powder River Basin and Colorado mining operations with Peabody’s, and we subsequently announced the termination of our joint venture efforts. We continue to pursue other strategic alternatives for our thermal assets, including, among other things, potential divestiture. We are concurrently shrinking our operational footprint at our thermal operations. During the first nine months of 2021, we have completed approximately $32.2 million of Asset Retirement Obligation (ARO) work at these operations, compared to approximately $4.5 million in the first nine months of 2020. We are also planning to establish self-funding mechanisms for these long-term reclamation liabilities at those operations. Currently, we will exercise our operational flexibility to maximize cash generation from our thermal operations. Longer term, we will maintain our focus on aligning our thermal production rates with the secular decline in domestic thermal coal demand, while adjusting our thermal operating plans to minimize future cash requirements and maintain flexibility to react to future short-term market fluctuations. We continue to streamline our entire organizational structure to reflect our long-term strategic direction as a leading producer of metallurgical products for the steelmaking industry.

Results of Operations

Three Months Ended September 30, 2021 and 2020

Revenues. Our revenues include sales to customers of coal produced at our operations and coal purchased from third parties. Transportation costs are included in cost of coal sales and amounts billed by us to our customers for transportation are included in revenues.

Coal Sales. The following table summarizes information about our coal sales during the three months ended September 30, 2021 and 2020:

	Three Months Ended September 30,
	2021		2020		(Decrease) / Increase
	(In thousands)
Coal sales	$	594,412	$	382,261	$	212,151
Tons sold		21,005		17,128		3,877

On a consolidated basis, coal sales in the third quarter of 2021 were approximately $212.2 million, or 55.5%, more than in the third quarter of 2020, while tons sold increased approximately 3.9 million tons, or 22.6%. Coal sales from Metallurgical operations increased approximately $127.2 million, primarily due to increased pricing. Thermal coal sales increased approximately $85.8 million due to increased pricing and volume. In the prior year quarter, our Viper operation, which was sold in December 2020, provided approximately $10.0 million in coal sales and 0.3 million tons sold. See the discussion in “Operational Performance” for further information about segment results.

Costs, expenses and other. The following table summarizes costs, expenses and other components of operating income during the three months ended September 30, 2021 and 2020:

	Three Months Ended September 30,
	2021		2020		Increase (Decrease) in Net Income
	(In thousands)
Cost of sales (exclusive of items shown separately below)	$	423,826	$	345,539	$	(78,287)
Depreciation, depletion and amortization		30,760		32,630		1,870
Accretion on asset retirement obligations		5,437		4,947		(490)
Change in fair value of coal derivatives and coal trading activities, net		19,641		2,649		(16,992)
Selling, general and administrative expenses		21,081		21,541		460
Costs related to proposed joint venture with Peabody Energy		—		4,423		4,423
Asset impairment and restructuring		—		163,106		163,106
Other operating income, net		(1,731)		(4,894)		(3,163)
Total costs, expenses and other	$	499,014	$	569,941	$	70,927

32

Cost of sales. Our cost of sales for the third quarter of 2021 increased approximately $78.3 million, or 22.7%, versus the third quarter of 2020. In the prior year quarter, our Viper operation, which was sold in December 2020, accounted for approximately $11.8 million in cost of sales. The increase in cost of sales at ongoing operations consists of increased transportation costs of approximately $30.9 million, increased repairs and supplies costs of approximately $28.0 million, increased operating taxes and royalties resulting from higher sales prices of approximately $22.9 million, and increased compensation costs of approximately $10.7 million. These cost increases were partially offset by an increase in credit for ARO reclamation work completed primarily at our Thermal operations of approximately $4.1 million. See discussion in “Operational Performance” for further information about segment results.

Depreciation, depletion, and amortization. The decrease in depreciation, depletion, and amortization in the third quarter of 2021 versus the third quarter of 2020 is primarily due to the reduced depreciation expense of approximately $2.7 million resulting from the asset impairment we recorded in the third quarter of 2020 in our Thermal segment.

Accretion on asset retirement obligations. The increase in accretion expense in the third quarter of 2021 versus the third quarter of 2020 is primarily related to the changes in the planned timing of reclamation work to be completed at our Thermal operations, specifically at the Coal Creek mine.

Change in fair value of coal derivatives and coal trading activities, net. The costs in both the third quarter of 2021 and 2020 are primarily related to mark-to-market losses on coal derivatives that we had entered to hedge our price risk for planned international thermal coal shipments.

Selling, general and administrative expenses. Selling, general and administrative expenses in the third quarter of 2021 decreased versus the third quarter of 2020 due to reduced contractor services of approximately $1.6 million, partially offset by increased compensation costs of approximately $1.0 million, primarily related to higher incentive compensation accruals recorded in the third quarter of 2021.

Costs related to proposed joint venture with Peabody Energy. We incurred expenses of $4.4 million in the third quarter of 2020 associated with the regulatory approval process related to the proposed joint venture with Peabody that was terminated jointly by the parties following the Federal Trade Commission’s successful lawsuit to block the joint venture.

Asset impairment and restructuring. In the third quarter of 2020, we recorded $163.1 million of impairment charges relating to three of our thermal operations, Coal Creek, West Elk, and Viper, as well as, our equity investment in Knight Hawk Holdings, LLC. For further information on our Asset Impairment costs, see Note 5, “Asset Impairment and Restructuring” to the Condensed Consolidated Financial Statements.

Other operating income, net. The decrease in other operating income, net in the third quarter of 2021 versus the third quarter of 2020 consists primarily of the net unfavorable impact of certain coal derivative settlements of approximately $9.1 million, partially offset by increased income from equity investments of approximately $3.7 million.

Nonoperating expenses. The following table summarizes our nonoperating expenses during the three months ended September 30, 2021 and 2020:

	Three Months Ended September 30,
	2021		2020		Increase (Decrease) in Net Income
	(In thousands)
Non-service related pension and postretirement benefit costs	$	(1,186)	$	(878)	$	(308)

Non-service related pension and postretirement benefit costs. The increase in non-service related pension and postretirement benefit costs in the third quarter of 2021 versus the third quarter of 2020 is primarily due to the increased postretirement benefit loss amortization in the third quarter of 2021.

33

Provision for (benefit from) income taxes. The following table summarizes our provision for (benefit from) income taxes for the three months ended September 30, 2021 and 2020:

	Three Months Ended September 30,
	2021		2020		Increase (Decrease) in Net Income
	(In thousands)
Provision for (benefit from) income taxes	$	(1,082)	$	379	$	1,461

See Note 12, “Income Taxes” to the Condensed Consolidated Financial Statements for a reconciliation of the federal income tax provision at the statutory rate to the actual provision for income taxes.

Nine Months Ended September 30, 2021 and 2020

Revenues. Our revenues include sales to customers of coal produced at our operations and coal purchased from third parties. Transportation costs are included in cost of coal sales and amounts billed by us to our customers for transportation are included in revenues.

Coal Sales. The following table summarizes information about our coal sales during the nine months ended September 30, 2021 and 2020:

	Nine Months Ended September 30,
	2021		2020		(Decrease) / Increase
	(In thousands)
Coal sales	$	1,402,345	$	1,107,014	$	295,331
Tons sold		52,262		47,367		4,895

On a consolidated basis, coal sales in the first nine months of 2021 were approximately $295.3 million, or 26.7%, more than in the first nine months of 2020, while tons sold increased approximately 4.9 million tons, or 10.3%. Coal sales from Metallurgical operations increased approximately $203.9 million due to increased pricing and volume. Thermal coal sales increased approximately $109.5 million due to increased pricing and volume. In the prior year period, our Viper operation, which was sold in December 2020, provided approximately $27.1 million in coal sales and 0.7 million tons sold. See the discussion in “Operational Performance” for further information about segment results.

Costs, expenses and other. The following table summarizes costs, expenses and other components of operating income during the nine months ended September 30, 2021 and 2020:

	Nine Months Ended September 30,
	2021		2020		Increase (Decrease) in Net Income
	(In thousands)
Cost of sales (exclusive of items shown separately below)	$	1,089,061	$	1,036,886	$	(52,175)
Depreciation, depletion and amortization		84,441		94,105		9,664
Accretion on asset retirement obligations		16,311		14,939		(1,372)
Change in fair value of coal derivatives and coal trading activities, net		28,931		3,263		(25,668)
Selling, general and administrative expenses		66,679		64,024		(2,655)
Costs related to proposed joint venture with Peabody Energy		—		15,938		15,938
Asset impairment and restructuring		—		176,371		176,371
Gain on property insurance recovery related to Mountain Laurel longwall		—		(23,518)		(23,518)
Gain on divestitures		—		(1,369)		(1,369)
Other operating income, net		(11,344)		(16,768)		(5,424)
Total costs, expenses and other	$	1,274,079	$	1,363,871	$	89,792

34

Cost of sales. Our cost of sales for the first nine months of 2021 increased approximately $52.2 million, or 5.0%, versus the first nine months of 2020. In the prior year period, our Viper operation, which was sold in December 2020, accounted for approximately $33.9 million in cost of sales. The increase in cost of sales at ongoing operations consists of increased transportation costs of approximately $56.2 million, increased operating taxes and royalties resulting from higher sales prices of approximately $33.6 million, increased compensation costs of approximately $15.8 million, and increased repairs and supplies costs of approximately $14.7 million. These cost increases were partially offset by an increase in credit for ARO reclamation work completed primarily at our Thermal operations of approximately $26.3 million and a decrease in purchased coal costs of approximately $12.5 million. See discussion in “Operational Performance” for further information about segment results.

Depreciation, depletion, and amortization. The decrease in depreciation, depletion, and amortization in the first nine months of 2021 versus the first nine months of 2020 is primarily due to the reduced depreciation expense of approximately $8.1 million resulting from the asset impairment we recorded in the third quarter of 2020 in our Thermal segment.

Accretion on asset retirement obligations. The increase in accretion expense in the first nine months of 2021 versus the first nine months of 2020 is primarily related to the changes in the planned timing of reclamation work to be completed at our Thermal operations, specifically at the Coal Creek mine.

Change in fair value of coal derivatives and coal trading activities, net. The costs in both the first nine months of 2021 and 2020 are primarily related to mark-to-market losses on coal derivatives that we had entered to hedge our price risk for planned international thermal coal shipments.

Selling, general and administrative expenses. Selling, general and administrative expenses in the first nine months of 2021 increased versus the first nine months of 2020 due to increased compensation costs of approximately $4.5 million, primarily related to higher incentive compensation accruals recorded in the first nine months of 2021, partially offset by reduced IT related costs of approximately $1.4 million.

Costs related to proposed joint venture with Peabody Energy. During the first nine months of 2020, we incurred expenses of $15.9 million associated with the regulatory approval process related to the proposed joint venture with Peabody that was terminated jointly by the parties following the Federal Trade Commission’s successful lawsuit to block the joint venture.

Asset impairment and restructuring. During the first nine months of 2020, we recorded $163.1 million of impairment charges relating to three of our thermal operations, Coal Creek, West Elk, and Viper, as well as, our equity investment in Knight Hawk Holdings, LLC. Also, during the first nine months of 2020, we recorded $13.3 million of employee severance expense related to voluntary separation plans that were accepted by 53 employees of the corporate staff and 201 employees of our Thermal operations. For further information on our Asset Impairment costs, see Note 5, “Asset Impairment and Restructuring” to the Condensed Consolidated Financial Statements.

Gain on property insurance recovery related to Mountain Laurel longwall. During the first nine months of 2020, we recorded a $23.5 million benefit from insurance proceeds related to the loss of certain longwall shields at our Mountain Laurel operation.

Gain on divestitures. During the first nine months of 2020, we recorded a $1.4 million gain on the sale of our idle Dal-Tex and Briar Branch properties.

Other operating income, net. The decrease in other operating income, net in the first nine months of 2021 versus the first nine months of 2020 consists primarily of the net unfavorable impact of certain coal derivative settlements of approximately $14.0 million, partially offset by increased income from equity investments of approximately $5.9 million and an unfavorable impact of mark to market movements on heating oil positions of approximately $2.0 million recorded in the first nine months of 2020.

35

Nonoperating expenses. The following table summarizes our nonoperating expenses during the nine months ended September 30, 2021 and 2020:

	Nine Months Ended September 30,
	2021		2020		Increase (Decrease) in Net Income
	(In thousands)
Non-service related pension and postretirement benefit costs	$	(3,252)	$	(3,076)	$	(176)
Reorganization items, net		—		26		(26)
Total nonoperating expenses	$	(3,252)	$	(3,050)	$	(202)

Non-service related pension and postretirement benefit costs. The increase in non-service related pension and postretirement benefit costs in the first nine months of 2021 versus the first nine months of 2020 is primarily due to the increased postretirement benefit loss amortization in the first nine months of 2021, partially offset by the increased pension settlement recorded in the same nine-month period.

Provision for (benefit from) income taxes. The following table summarizes our provision for (benefit from) income taxes during the nine months ended September 30, 2021 and 2020:

	Nine Months Ended September 30,
	2021		2020		Increase (Decrease) in Net Income
	(In thousands)
Provision for (benefit from) income taxes	$	1,301	$	(206)	$	(1,507)

See Note 12, “Income Taxes” to the Condensed Consolidated Financial Statements for a reconciliation of the federal income tax provision (benefit) at the statutory rate to the actual provision for (benefit from) income taxes.

36

Operational Performance

Three and Nine Months Ended September 30, 2021 and 2020

On December 31, 2020, we sold our Viper operation. As a result, we revised our reportable segments beginning in the first quarter of 2021 to better reflect the manner in which the chief operating decision maker (CODM) views our businesses going forward for purposes of reviewing performance, allocating resources and assessing future prospects and strategic execution. Prior to the first quarter of 2021, we had three reportable segments: MET, Powder River Basin (PRB), and Other Thermal. After the divestment of Viper, we have three remaining active thermal mines: West Elk, Black Thunder, and Coal Creek. With two distinct lines of business, metallurgical and thermal, the movement to two segments better aligns with how we make decisions and allocate resources. No changes were made to the MET Segment and the three remaining thermal mines have been combined as the “Thermal Segment”. The prior periods have been restated to reflect the change in reportable segments.

Our mining operations are evaluated based on Adjusted EBITDA, per-ton cash operating costs (defined as including all mining costs except depreciation, depletion, amortization, accretion on asset retirements obligations, and pass-through transportation expenses, divided by segment tons sold), and on other non-financial measures, such as safety and environmental performance. Adjusted EBITDA is defined as net income (loss) attributable to us before the effect of net interest expense, income taxes, depreciation, depletion and amortization, the accretion on asset retirement obligations and nonoperating expenses. Adjusted EBITDA may also be adjusted for items that may not reflect the trend of future results by excluding transactions that are not indicative of our core operating performance. Adjusted EBITDA is not a measure of financial performance in accordance with generally accepted accounting principles, and items excluded from Adjusted EBITDA are significant in understanding and assessing our financial condition. Therefore, Adjusted EBITDA should not be considered in isolation, nor as an alternative to net income (loss), income (loss) from operations, cash flows from operations or as a measure of our profitability, liquidity or performance under generally accepted accounting principles. Furthermore, analogous measures are used by industry analysts and investors to evaluate our operating performance. Investors should be aware that our presentation of Adjusted EBITDA may not be comparable to similarly titled measures used by other companies.

The following table shows results by operating segment for the three and nine months ended September 30, 2021 and September 30, 2020.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2021		2020		Variance		2021		2020		Variance
Metallurgical
Tons sold (in thousands)		1,980		1,971		9		5,706		5,225		481
Coal sales per ton sold	$	128.77	$	67.04	$	61.73	$	101.48	$	74.83	$	26.65
Cash cost per ton sold	$	68.84	$	60.78	$	(8.06)	$	62.74	$	60.31	$	(2.43)
Cash margin per ton sold	$	59.93	$	6.26	$	53.67	$	38.74	$	14.52	$	24.22
Adjusted EBITDA (in thousands)	$	118,548	$	12,407	$	106,141	$	221,391	$	76,037	$	145,354
Thermal
Tons sold (in thousands)		19,025		15,131		3,894		46,521		41,649		4,872
Coal sales per ton sold	$	13.38	$	13.47	$	(0.09)	$	13.36	$	13.56	$	(0.20)
Cash cost per ton sold	$	10.70	$	11.39	$	0.69	$	11.15	$	13.17	$	2.02
Cash margin per ton sold	$	2.68	$	2.08	$	0.59	$	2.21	$	0.39	$	1.82
Adjusted EBITDA (in thousands)	$	52,737	$	31,616	$	21,121	$	107,589	$	19,600	$	87,989

This table reflects numbers reported under a basis that differs from U.S. GAAP. See “Reconciliation of Non-GAAP measures” below for explanation and reconciliation of these amounts to the nearest GAAP measures. Other companies may calculate these per ton amounts differently, and our calculation may not be comparable to other similarly titled measures.

37

Metallurgical — Adjusted EBITDA for the three and nine months ended September 30, 2021 increased from the three and nine months ended September 30, 2020 due to increased pricing and increased volume in the case of the nine month period. These benefits were partially offset by increased cash cost of sales per ton sold. The improvement in the current year periods over the prior year periods is largely due to the difference in trajectory of the COVID-19 pandemic during the respective periods in time. During the first nine months of 2021, increasing vaccine availability and decreasing infection rates led to accelerating economic growth, and increasing steel demand and pricing, improving prompt coking coal index prices. In contrast, during the first nine months of 2020, coking coal prices fell as large scale industrial shutdowns were initiated in response to the emergence of COVID-19. Particularly, in the three months ended September 30, 2021, surging coking coal demand, largely from China, and constrained supply led to historically high pricing across all coking coal indices. The increase in cash cost per ton sold is largely due to increased taxes and royalties that are based on a percentage of coal sales per ton sold.

During the end of the third quarter of 2021, we completed our Leer South longwall development, and initiated longwall production in late August of 2021. The ramp up is ongoing, and we expect to achieve planned productivity levels by early 2022. The addition of this second longwall operation to our Metallurgical Segment is expected to significantly increase our future volumes and strengthen our low average segment cost structure relative to our peers.

Our Metallurgical segment sold 1.8 million tons of coking coal and 0.2 million tons of associated thermal coal in the three months ended September 30, 2021, compared to 1.7 million tons of coking coal and 0.3 million tons of associated thermal coal in the three months ended September 30, 2020. In the nine months ended September 30, 2021, we sold 5.1 million tons of coking coal and 0.6 million tons of associated thermal coal compared to 4.5 million tons of coking coal and 0.7 million tons of associated thermal coal in the nine months ended September 30, 2020. Longwall operations accounted for approximately 70% of our shipment volume in the three and nine months ended September 30, 2021, compared to approximately 60% of our shipment volume in the three and nine months ended September 30, 2020.

Thermal — Adjusted EBITDA for the three and nine months ended September 30, 2021 increased versus the three and nine months ended September 30, 2020, due to increased sales volume and decreased cash cost per ton sold, partially offset by decreased coal sales per ton sold. The improvement in the current year periods over the prior year periods is largely due to increased domestic utility coal burn, resulting from higher natural gas pricing and improved economic growth. The reduction in both coal sales per ton sold and cash cost per ton sold is driven by the increased percentage of volume from our lower cost and lower priced Black Thunder operation. Our cash cost per ton sold also benefited from our operational flexibility to take advantage of increasing demand, despite the substantial progress we have made in our efforts to align production levels with the secular decline in domestic thermal coal demand. Also, contributing to the decreases in cost and price is the inclusion of approximately 0.7 million tons sold from our former Viper operation in the nine months ended September 30, 2020. During the first nine months of 2021, we completed approximately $32.2 million of ARO work at our current Thermal operations, compared to $4.5 million during the first nine months of 2020.

38

Reconciliation of Non-GAAP measures

Segment coal sales per ton sold

Non-GAAP Segment coal sales per ton sold is calculated as segment coal sales revenues divided by segment tons sold. Segment coal sales revenues are adjusted for transportation costs, and may be adjusted for other items that, due to generally accepted accounting principles, are classified in “other income” on the statement of operations, but relate to price protection on the sale of coal. Segment coal sales per ton sold is not a measure of financial performance in accordance with generally accepted accounting principles. We believe segment coal sales per ton sold provides useful information to investors as it better reflects our revenue for the quality of coal sold and our operating results by including all income from coal sales. The adjustments made to arrive at these measures are significant in understanding and assessing our financial condition. Therefore, segment coal sales revenues should not be considered in isolation, nor as an alternative to coal sales revenues under generally accepted accounting principles.

					Idle and
Three Months Ended September 30, 2021	Metallurgical		Thermal		Other		Consolidated
(In thousands)
GAAP Revenues in the Condensed Consolidated Statements of Operations	$	295,291	$	299,096	$	25	$	594,412
Less: Adjustments to reconcile to Non-GAAP Segment coal sales revenue
Coal risk management derivative settlements classified in "other income"		(502)		6,997		—		6,495
Coal sales revenues from idled or otherwise disposed operations not included in segments		—		—		26		26
Transportation costs		40,845		37,565		(1)		78,409
Non-GAAP Segment coal sales revenues	$	254,948	$	254,534	$	—	$	509,482
Tons sold		1,980		19,025
Coal sales per ton sold	$	128.77	$	13.38

					Idle and
Three Months Ended September 30, 2020	Metallurgical		Thermal		Other		Consolidated
(In thousands)
GAAP Revenues in the Condensed Consolidated Statements of Operations	$	168,054	$	213,299	$	908	$	382,261
Less: Adjustments to reconcile to Non-GAAP Segment coal sales revenue
Coal risk management derivative settlements classified in "other income"		(29)		(2,552)		—		(2,581)
Coal sales revenues from idled or otherwise disposed operations not included in segments		—		—		903		903
Transportation costs		35,951		11,996		5		47,952
Non-GAAP Segment coal sales revenues	$	132,132	$	203,855	$	—	$	335,987
Tons sold		1,971		15,131
Coal sales per ton sold	$	67.04	$	13.47

39

					Idle and
Nine Months Ended September 30, 2021	Metallurgical		Thermal		Other		Consolidated
(In thousands)
GAAP Revenues in the Condensed Consolidated Statements of Operations	$	693,522	$	707,394	$	1,429	$	1,402,345
Less: Adjustments to reconcile to Non-GAAP Segment coal sales revenue
Coal risk management derivative settlements classified in "other income"		(1,192)		8,200		—		7,008
Coal sales revenues from idled or otherwise disposed operations not included in segments		—		—		1,424		1,424
Transportation costs		115,682		77,631		5		193,318
Non-GAAP Segment coal sales revenues	$	579,032	$	621,563	$	—	$	1,200,595
Tons sold		5,706		46,521
Coal sales per ton sold	$	101.48	$	13.36

					Idle and
Nine Months Ended September 30, 2020	Metallurgical		Thermal		Other		Consolidated
(In thousands)
GAAP Revenues in the Condensed Consolidated Statements of Operations	$	489,660	$	597,887	$	19,467	$	1,107,014
Less: Adjustments to reconcile to Non-GAAP Segment coal sales revenue
Coal risk management derivative settlements classified in "other income"		(548)		(6,366)		—		(6,914)
Coal sales revenues from idled or otherwise disposed operations not included in segments		—		—		19,395		19,395
Transportation costs		99,188		39,418		72		138,678
Non-GAAP Segment coal sales revenues	$	391,020	$	564,835	$	—	$	955,855
Tons sold		5,225		41,649
Coal sales per ton sold	$	74.83	$	13.56

40

Segment cash cost per ton sold

Non-GAAP Segment cash cost per ton sold is calculated as segment cash cost of coal sales divided by segment tons sold. Segment cash cost of coal sales is adjusted for transportation costs, and may be adjusted for other items that, due to generally accepted accounting principles, are classified in “other income” on the statement of operations, but relate directly to the costs incurred to produce coal. Segment cash cost per ton sold is not a measure of financial performance in accordance with generally accepted accounting principles. We believe segment cash cost per ton sold better reflects our controllable costs and our operating results by including all costs incurred to produce coal. The adjustments made to arrive at these measures are significant in understanding and assessing our financial condition. Therefore, segment cash cost of coal sales should not be considered in isolation, nor as an alternative to cost of sales under generally accepted accounting principles.

					Idle and
Three Months Ended September 30, 2021	Metallurgical		Thermal		Other		Consolidated
(In thousands)
GAAP Cost of sales in the Condensed Consolidated Statements of Operations	$	177,146	$	241,158	$	5,522	$	423,826
Less: Adjustments to reconcile to Non-GAAP Segment cash cost of coal sales
Transportation costs		40,845		37,565		(1)		78,409
Cost of coal sales from idled or otherwise disposed operations not included in segments		—		—		4,012		4,012
Other (operating overhead, certain actuarial, etc.)		—		—		1,511		1,511
Non-GAAP Segment cash cost of coal sales	$	136,301	$	203,593	$	—	$	339,894
Tons sold		1,980		19,025
Cash Cost Per Ton Sold	$	68.84	$	10.70

					Idle and
Three Months Ended September 30, 2020	Metallurgical		Thermal		Other		Consolidated
(In thousands)
GAAP Cost of sales in the Condensed Consolidated Statements of Operations	$	155,729	$	184,045	$	5,765	$	345,539
Less: Adjustments to reconcile to Non-GAAP Segment cash cost of coal sales
Diesel fuel risk management derivative settlements classified in "other income"		—		(278)		—		(278)
Transportation costs		35,951		11,996		5		47,952
Cost of coal sales from idled or otherwise disposed operations not included in segments		—		—		4,007		4,007
Other (operating overhead, certain actuarial, etc.)		—		—		1,753		1,753
Non-GAAP Segment cash cost of coal sales	$	119,778	$	172,327	$	—	$	292,105
Tons sold		1,971		15,131
Cash Cost Per Ton Sold	$	60.78	$	11.39

41

						Idle and
Nine Months Ended September 30, 2021	Metallurgical		Thermal			Other		Consolidated
(In thousands)
GAAP Cost of sales in the Condensed Consolidated Statements of Operations	$	473,687	$	596,344		$	19,030	$	1,089,061
Less: Adjustments to reconcile to Non-GAAP Segment cash cost of coal sales
Transportation costs		115,682		77,631			5		193,318
Cost of coal sales from idled or otherwise disposed operations not included in segments		—		—			13,584		13,584
Other (operating overhead, certain actuarial, etc.)		—		—			5,441		5,441
Non-GAAP Segment cash cost of coal sales	$	358,005	$	518,713	$		—	$	876,718
Tons sold		5,706		46,521
Cash Cost Per Ton Sold	$	62.74	$	11.15

					Idle and
Nine Months Ended September 30, 2020	Metallurgical		Thermal		Other		Consolidated
(In thousands)
GAAP Cost of sales in the Condensed Consolidated Statements of Operations	$	414,301	$	585,837	$	36,748	$	1,036,886
Less: Adjustments to reconcile to Non-GAAP Segment cash cost of coal sales
Diesel fuel risk management derivative settlements classified in "other income"		—		(1,976)		—		(1,976)
Transportation costs		99,188		39,418		72		138,678
Cost of coal sales from idled or otherwise disposed operations not included in segments		—		—		30,960		30,960
Other (operating overhead, certain actuarial, etc.)		—		—		5,716		5,716
Non-GAAP Segment cash cost of coal sales	$	315,113	$	548,395	$	—	$	863,508
Tons sold		5,225		41,649
Cash Cost Per Ton Sold	$	60.31	$	13.17

42

Reconciliation of Segment Adjusted EBITDA to Net Income (Loss)

The discussion in “Results of Operations” above includes references to our Adjusted EBITDA for each of our reportable segments. Adjusted EBITDA is defined as net income (loss) attributable to us before the effect of net interest expense, income taxes, depreciation, depletion and amortization, the accretion on asset retirement obligations and nonoperating expenses. Adjusted EBITDA may also be adjusted for items that may not reflect the trend of future results by excluding transactions that are not indicative of our core operating performance. We use Adjusted EBITDA to measure the operating performance of our segments and allocate resources to our segments. Adjusted EBITDA is not a measure of financial performance in accordance with generally accepted accounting principles, and items excluded from Adjusted EBITDA are significant in understanding and assessing our financial condition. Therefore, Adjusted EBITDA should not be considered in isolation, nor as an alternative to net income (loss), income (loss) from operations, cash flows from operations or as a measure of our profitability, liquidity or performance under generally accepted accounting principles. Investors should be aware that our presentation of Adjusted EBITDA may not be comparable to similarly titled measures used by other companies. The table below shows how we calculate Adjusted EBITDA.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Net income (loss)	$	89,143	$	(191,467)	$	110,967	$	(266,090)
Provision for (benefit from) income taxes		(1,082)		379		1,301		(206)
Interest expense, net		6,151		2,530		12,746		6,389
Depreciation, depletion and amortization		30,760		32,630		84,441		94,105
Accretion on asset retirement obligations		5,437		4,947		16,311		14,939
Costs related to proposed joint venture with Peabody Energy		—		4,423		—		15,938
Asset impairment and restructuring		—		163,106		—		176,371
Gain on property insurance recovery related to Mountain Laurel longwall		—		—		—		(23,518)
Gain on divestitures		—		—		—		(1,369)
Non-service related pension and postretirement benefit costs		1,186		878		3,252		3,076
Reorganization items, net		—		—		—		(26)
Adjusted EBITDA		131,595		17,426		229,018		19,609
EBITDA from idled or otherwise disposed operations		3,074		2,896		10,637		10,691
Selling, general and administrative expenses		21,081		21,541		66,679		64,024
Other		15,535		2,160		22,646		1,313
Segment Adjusted EBITDA from coal operations	$	171,285	$	44,023	$	328,980	$	95,637

Other includes primarily income from our equity investments, certain changes in fair value of heating oil and diesel fuel derivatives we use to manage our exposure to diesel fuel pricing, certain changes in the fair value of coal derivatives and coal trading activities, EBITDA provided by our land company, and certain miscellaneous revenue.

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Liquidity and Capital Resources

Our primary sources of liquidity are proceeds from coal sales to customers and certain financing arrangements. Excluding significant investing activity, we intend to satisfy our working capital requirements and fund capital expenditures and debt-service obligations with cash generated from operations and cash on hand. As we continue to evaluate the impacts of COVID-19 and the responses thereto on our business, we remain focused on prudently managing costs, including capital expenditures, maintaining a strong balance sheet, and ensuring adequate liquidity.

Given the volatile nature of coal markets, and the significant challenges and uncertainty surrounding COVID-19, we believe it remains important to take a prudent approach to managing our balance sheet and liquidity. Due to the current economic uncertainties related to COVID-19 and the related disruption in the financial markets, we may be limited in accessing capital markets or obtaining additional bank financing, or the cost of accessing this financing could become more expensive. We believe our current liquidity level is sufficient to fund our business, and given the completion of our Leer South development and current favorable pricing environment, we expect our liquidity to grow in the near term. With the improvement in liquidity, we plan to begin funding a sinking fund for our long-term reclamation liabilities at our thermal operations in the Powder River Basin, and have committed to make contributions of $15 million in the fourth quarter of 2021 and $30 million in 2022. If cashflows are supportive, we will also make contributions above those minimum amounts. Additionally, we are reinstating our quarterly dividend, and will pay a $0.25 per share quarterly dividend in the fourth quarter of 2021. In the near term, our financial priorities will be to increase liquidity and reduce debt and other obligations. Moving forward, we will continue to evaluate our capital allocation initiatives in light of the current state of, and our outlook for coal markets, the amount of our planned production that has been committed and priced, the capital needs of the business, other strategic opportunities, and developments in the COVID-19 outbreak and the responses thereto.

On March 7, 2017, we entered into a senior secured term loan credit agreement in an aggregate principal amount of $300 million (the “Term Loan Debt Facility”) with Credit Suisse AG, Cayman Islands Branch, as administrative agent and collateral agent and the other financial institutions from time to time party thereto. The Term Loan Debt Facility was issued at 99.50% of the face amount and will mature on March 7, 2024. The term loans provided under the Term Loan Debt Facility (the “Term Loans”) are subject to quarterly principal amortization payments in an amount equal to $750,000. Proceeds from the Term Loan Debt Facility were used to repay all outstanding obligations under our previously existing term loan credit agreement, dated as of October 5, 2016. The interest rate on the Term Loan is, at our option, either (i) the London interbank offered rate (“LIBOR”) plus an applicable margin of 2.75%, subject to a 1.00% LIBOR floor, or (ii) a base rate plus an applicable margin of 1.75%. For further information regarding the Term Loan Debt Facility, see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

We have entered into a series of interest rate swaps to fix a portion of the LIBOR interest payments due under the Term Loans. As interest payments are made on the Term Loans, amounts in accumulated other comprehensive income will be reclassified into earnings through interest expense to reflect a net interest on the Term Loans equal to the effective yield of the fixed rate of the swap plus 2.75%, which is the spread on the Term Loans as amended. For further information regarding the interest rate swaps, see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

On September 30, 2020, we extended and amended our existing trade accounts receivable securitization facility provided to Arch Receivable Company, LLC, a special-purpose entity that is a wholly owned subsidiary of Arch Resources (“Arch Receivable”) (the “Securitization Facility”), which supports the issuance of letters of credit and requests for cash advances. The amendment to the Securitization Facility reduced the facility size from $160 million to $110 million and extended the maturity date to September 29, 2023. For further information regarding the Securitization Facility see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

On September 30, 2020, we amended the senior secured inventory-based revolving credit facility in an aggregate principal amount of $50 million (the “Inventory Facility”) with Regions Bank (“Regions”) as administrative agent and collateral agent, as lender and swingline lender (in such capacities, the “Lender”) and as letter of credit issuer. Availability under the Inventory Facility is subject to a borrowing base consisting of (i) 85% of the net orderly liquidation value of eligible coal inventory, plus (ii) the lesser of (x) 85% of the net orderly liquidation value of eligible parts and supplies inventory and (y) 35% of the amount determined pursuant to clause (i), plus (iii) 100% of our Eligible

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Cash (defined in the Inventory Facility), subject to reduction for reserves imposed by Regions. The amendment of the Inventory Facility extended the maturity date to September 29, 2023, eliminated the provision that accelerated maturity of the facility upon falling below a specified level of liquidity, and reduced the minimum liquidity requirement from $175 million to $100 million. Additionally, the amendment includes provisions that reduce the advance rates for coal inventory and parts and supplies, depending on liquidity. During the second quarter of 2021, we entered into an amendment to temporarily suspend certain of the Liquidity requirements within the existing facility through the filing of the September 2021 borrowing base. For further information regarding the Inventory Facility, see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

On July 2, 2020, the West Virginia Economic Development Authority (the “Issuer”) issued $53.1 million aggregate principal amount of Solid Waste Disposal Facility Revenue Bonds (Arch Resources Project), Series 2020 (the “Tax Exempt Bonds”) pursuant to an Indenture of Trust dated as of June 1, 2020 (the “Indenture of Trust”) between the Issuer and Citibank, N.A., as trustee (the “Trustee”). As a follow-on to our $53.1 million offering, on March 4, 2021, the Issuer issued an additional $45.0 million in Series 2021 Tax Exempt Bonds. The proceeds of the Tax Exempt Bonds are loaned to us as we make qualifying expenditures pursuant to a Loan Agreement dated as of June 1, 2020, as supplemented by a First Amendment to the Loan Agreement dated March 1, 2021 (collectively, the “Loan Agreement”), each between the Issuer and us. The Tax Exempt Bonds are payable solely from payments to be made by us under the Loan Agreement as evidenced by a Note from us to the Trustee. The proceeds of the Tax Exempt Bonds were used to finance certain costs of the acquisition, construction, reconstruction, and equipping of solid waste disposal facilities at our Leer South development, and for capitalized interest and certain costs related to the issuance of the Tax Exempt Bonds. As of September 30, 2021, the Company has utilized the total Tax Exempt Bond proceeds. For further information regarding the Tax Exempt Bonds, see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

In November, 2020, we issued $155.3 million in aggregate principal amount of 5.25% convertible senior notes due 2025 (“Convertible Notes” or “Convertible Debt”). The net proceeds from the issuance of the Convertible Notes, after deducting offering related costs of $5.1 million and the cost of a capped call transaction of $17.5 million, were approximately $132.7 million. The Convertible Notes bear interest at the annual rate of 5.25%, payable semiannually in arrears on May 15 and November 15 of each year, and will mature on November 15, 2025, unless earlier converted, redeemed or repurchased by us. For further information regarding the Convertible Debt, see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

During the third quarter of 2021, the common stock price condition of the Convertible Notes was satisfied, as the closing stock price exceeded 130% of the conversion price of approximately $37.325 for at least 20 trading days of the last 30 trading days prior to quarter end. As a result, the Convertible Notes are convertible at the election of the noteholders during the fourth quarter, and due to our stated intent to settle the principal value in cash, the liability portion of $120.0 million of the Convertible Notes was included in current maturities of debt on our Condensed Consolidated Balance Sheet at September 30, 2021. As of the date of this Quarterly Report on Form 10-Q, we have not received any conversion requests for the Convertible Notes and do not anticipate receiving any conversion requests as the market value of the Convertible Notes exceeds the conversion value of the Convertible Notes. As of September 30, 2021, the if-converted value of the Convertible Notes exceeded the principal amount by $230.5 million. For further information regarding the Convertible Notes and the capped call transactions, see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

On July 29, 2021, we entered into an equipment financing arrangement accounted for as debt. We received $23.5 million in exchange for conveying an interest in certain equipment in operation at our Powder River Basin operations and entered into a master lease arrangement for that equipment. The financing arrangement contains customary terms and events of default and provides for 42 monthly payments with an average implied interest rate of 7.35% maturing on February 1, 2025. Upon maturity, we will have the option to purchase the equipment. For further information regarding the Equipment Financing, see Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements.

On April 27, 2017, our Board of Directors authorized a capital return program consisting of a share repurchase program and a quarterly cash dividend. The share repurchase plan has a total authorization of $1.05 billion, of which we have used $827.4 million. During the three months ended September 30, 2021, we did not repurchase any shares of our

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stock. The timing and amount of any future share purchases and the ultimate number of shares to be purchased will depend on a number of factors, including business and market conditions, our future financial performance, and other capital priorities. Any shares acquired would be in the open market or through private transactions in accordance with Securities and Exchange Commission requirements. On April 23, 2020, we announced the suspension of our quarterly dividend due to the significant economic uncertainty surrounding the COVID-19 pandemic and the steps being taken to control the virus. During the three months ended September 30, 2021, we did not pay any dividends on shares of our stock. On October 26, 2021, we announced the initiation of a $0.25 per share quarterly dividend. The first dividend payment will be made to shareholders of record as of November 30, 2021, payable on December 15, 2021.

On September 30, 2021, we had total liquidity of approximately $254 million, including $210 million in unrestricted cash and equivalents and short-term investments in debt securities, with the remainder provided by availability under our credit facilities and funds withdrawable from brokerage accounts. The table below summarizes our availability under our credit facilities as of September 30, 2021:

					Letters of
			Borrowing		Credit				Contractual
	Face Amount		Base		Outstanding		Availability		Expiration
	(Dollars in thousands)
Securitization Facility	$	110,000	$	91,700	$	61,183	$	30,517		September 29, 2023
Inventory Facility		50,000		40,968		27,712		13,256		September 29, 2023
Total	$	160,000	$	132,668	$	88,895	$	43,773

The above standby letters of credit outstanding have primarily been issued to satisfy certain insurance-related collateral requirements. The amount of collateral required by counterparties is based on their assessment of our ability to satisfy our obligations and may change at the time of policy renewal or based on a change in their assessment. Future increases in the amount of collateral required by counterparties would reduce our available liquidity.

The following is a summary of cash provided by or used in each of the indicated types of activities during the nine months ended September 30, 2021 and 2020:

	Nine Months Ended September 30,
	2021		2020
(In thousands)
Cash provided by (used in):
Operating activities	$	91,582	$	55,914
Investing activities		(132,834)		(111,945)
Financing activities		38,615		73,585

Cash Flow

Cash provided by operating activities increased in the nine months ended September 30, 2021 versus the nine months ended September 30, 2020 mainly due to the improvement in results from operations discussed in the “Overview” and “Operational Performance” sections above, partially offset by a greater increase in working capital requirements of approximately $117 million in the current year period, primarily in receivables; receipt of an approximately $38 million income tax refund in the prior year period; and an increase in reclamation work completed of approximately $26 million in the current year period.

Cash used in investing activities increased in the nine months ended September 30, 2021 versus the nine months ended September 30, 2020 primarily due to the approximately $24 million in property insurance proceeds received on our Mountain Laurel longwall claim in the nine months ended September 30, 2020, and approximately $6 million in increased capital spending in the nine months ended September 30, 2021, partially offset by a net increase in proceeds from sale of short term investments in the nine months ended September 30, 2021 of approximately $10 million.

Cash provided by financing activities decreased in the nine months ended September 30, 2021 compared to the nine months ended September 30, 2020 primarily due to a net decrease in proceeds from Equipment Financing transactions of

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approximately $34 million and a net decrease in proceeds from the issuance of our Tax Exempt Bonds of approximately $8 million, partially offset by a dividend payment of approximately $8 million in the first nine months of 2020.

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Item 3.Quantitative and Qualitative Disclosures About Market Risk

We manage our commodity price risk for our non-trading, thermal coal sales through the use of long-term coal supply agreements, and to a limited extent, through the use of derivative instruments. Sales commitments in the metallurgical coal market are typically not long term in nature, and we are therefore subject to fluctuations in market pricing.

Our sales commitments for 2021 were as follows as of September 30, 2021:

	2021
	Tons	$ per ton
Metallurgical	(in millions)
Committed, North America Priced Coking	1.8	$	90.77
Committed, North America Unpriced Coking	—
Committed, Seaborne Priced Coking	4.3		120.05
Committed, Seaborne Unpriced Coking	1.1
Committed, Priced Thermal	0.7		24.36
Committed, Unpriced Thermal	—
Thermal
Committed, Priced	66.0	$	14.03
Committed, Unpriced	0.5

For 2022, North American steel producers have begun to lock in their coking coal requirements for 2022. We have sales committed of approximately 400,000 tons for 2022. Of these sale commitments, we have committed Low-Vol and High-Vol A coal at both fixed prices of approximately $230 per ton and prices linked to the USA East Coast indexes.

For our Thermal Segment, we have sales committed of approximately 70 million tons of PRB coal for delivery in 2022, at an average price across all those tons at approximately $16 per ton.  Based on our existing North American commitments as well as already locked-in but not priced seaborne volumes, our expectation is that West Elk will produce approximately 4 million tons in 2022.

We have exposure to price risk for supplies that are used directly or indirectly in the normal course of production, such as diesel fuel, steel, explosives and other items. We manage our risk for these items through strategic sourcing contracts in normal quantities with our suppliers. We may sell or purchase forward contracts, swaps and options in the over-the-counter market in order to manage its exposure to price risk related to these items.

We are exposed to market risk associated with interest rates due to our existing level of indebtedness. At September 30, 2021, of our $601.8 million principal amount of debt outstanding, approximately $286.5 million of outstanding borrowings have interest rates that fluctuate based on changes in the market rates. An increase in the interest rates related to these borrowings of 25 basis points would not result in a material annualized increase in interest expense based on interest rates in effect at September 30, 2021, because we have fixed a significant portion of the LIBOR portion of the interest rate on our Term Loans using interest rate swaps. As of September 30, 2021, the LIBOR rate was well below the 1% floor established in our Term Loan Debt Facility. See Note 11, “Debt and Financing Arrangements” to the Condensed Consolidated Financial Statements for additional information on the interest rate swaps.

Item 4.Controls and Procedures

We performed an evaluation under the supervision and with the participation of our management, including our chief executive officer and chief financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures as of September 30, 2021. Based on that evaluation, our management, including our chief

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executive officer and chief financial officer, concluded that the disclosure controls and procedures were effective as of such date. There were no changes in our internal control over financial reporting during the fiscal quarter to which this report relates that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II

OTHER INFORMATION

Item 1.Legal Proceedings

We are involved in various claims and legal actions arising in the ordinary course of business, including employee injury claims. After conferring with counsel, it is the opinion of management that the ultimate resolution of these claims, to the extent not previously provided for, will not have a material adverse effect on our consolidated financial condition, results of operations or liquidity.

Item 1A. Risk Factors

There have been no material changes to the “Risk Factors” disclosed in Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2020.

Item 2.Unregistered Sales of Equity Securities and Use of Proceeds

On April 17, 2019, the Board of Directors authorized an additional $300 million to the share repurchase program, bringing the total authorization since the program’s launch to $1.05 billion. The timing of any future share purchases, and the ultimate number of shares to be purchased, will depend on a number of factors, including business and market conditions, our future financial performance, and other capital priorities. The shares will be acquired in the open market or through private transactions in accordance with Securities and Exchange Commission requirements. The share repurchase program has no termination date, but may be amended, suspended or discontinued at any time and does not commit us to repurchase shares of our common stock. The actual number and value of the shares to be purchased will depend on the performance of our stock price and other market conditions. We did not purchase any shares of our common stock under this program for the quarter ended September 30, 2021.

As of September 30, 2021, we had approximately $223 million remaining authorized for stock repurchases under this program.

Item 4.Mine Safety Disclosures

The statement concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K is included in Exhibit 95 to this Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021.

Item 5. Other Information

Upon the recommendation of the Personnel and Compensation Committee of our Board of Directors, on October 25, 2021, the independent members of our Board of Directors approved an amendment and restatement of the April 30, 2020 letter agreement with John W. Eaves that outlines the terms of Mr. Eaves service as our Executive Chair of the Board (the “Eaves Agreement”).  The Eaves Agreement, as amended and restated, extends Mr. Eaves’ service as Executive Chair from February 27, 2023 until December 31, 2023 and, in addition to the previously disclosed terms of the Eaves Agreement and the standard terms of his LTIP awards, provides that the award granted to him on October 13, 2021 will fully vest if he is terminated without cause prior to October 13, 2023.

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Item 6. Exhibits

2.1	Debtors’ Fourth Amended Joint Plan of Reorganization Under Chapter 11 of the Bankruptcy Code (incorporated by reference to Exhibit 2.2 of Arch Resources’s Current Report on Form 8-K filed on September 15, 2016).
2.2	Order Confirming Debtors’ Fourth Amended Joint Plan of Reorganization Under Chapter 11 of the Bankruptcy Code on September 13, 2016 (incorporated by reference to Exhibit 2.1 of Arch Resources’s Current Report on Form 8-K filed on September 15, 2016).
3.1	Restated Certificate of Incorporation of Arch Resources, Inc. (incorporated by reference to Exhibit 3.2 of Arch Resources’s registration statement on Form 8-K filed on May 15, 2020).
3.2	Restated Bylaws of Arch Resources, Inc. (incorporated by reference to Exhibit 3.3 of Arch Resources’s Current Report on Form 8-K filed on May 15, 2020).
4.1	Form of specimen Class A Common Stock certificate (incorporated by reference to Exhibit 4.1 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).
4.2	Form of specimen Class B Common Stock certificate (incorporated by reference to Exhibit 4.2 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).
4.3	Form of specimen Series A Warrant certificate (incorporated by reference to Exhibit A of Exhibit 10.5 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).
4.4	Description of Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934, as amended (incorporated by reference to Exhibit 4.4 of Arch Resources’s Current Report on Form 10-K filed for the year ended 2019).
4.5	Indenture, dated as of November 3, 2020, between Arch Resources, Inc. and UMB Bank, National Association, as trustee (incorporated by reference to Exhibit 4.1 of Arch Resources’s Current Report on Form 8-K filed on November 4, 2020).
4.6	Form of certificate representing the 5.25% Convertible Senior Notes due 2025 (incorporated by reference to Exhibit 4.2 of Arch Resources’s Current Report on Form 8-K filed on November 4, 2020).
10.1	Credit Agreement, dated as of March 7, 2017, among Arch Resources, Inc. as borrower, the lenders from time to time party thereto and Credit Suisse AG, Cayman Islands Branch, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.1 of Arch Resources’s Current Report on Form 8-K filed on March 8, 2017).
10.2	First Amendment to Credit Agreement, dated as of September 25, 2017, among Arch Resources, Inc. as borrower, the lenders from time to time party thereto and Credit Suisse AG, Cayman Islands Branch, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.1 of Arch Resources’s Current Report on Form 8-K filed on September 25, 2017).
10.3	Second Amendment to Credit Agreement, dated as of April 3, 2018, among Arch Resources, Inc. as borrower, the lenders from time to time party thereto and Credit Suisse AG, Cayman Islands Branch, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.1 of Arch Resources’s Current Report on Form 8-K filed on April 3, 2018).
10.4	Credit Agreement, dated as of April 27, 2017, among Arch Resources, Inc. and certain of its subsidiaries, as borrowers, the lenders from time to time party thereto and Regions Bank, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.1 of Arch Resources’s Current Report on Form 8-K filed on May 2, 2017).

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10.5	First Amendment to Credit Agreement dated November 19, 2018 by and among Arch Resources, Inc. and certain of its subsidiaries, as borrowers, the lenders from time to time party thereto and Regions Bank, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.5 to Arch Resources’s Annual Report on Form 10-K for the year ended 2018).
10.6	Waiver Letter Agreement and Second Amendment to Credit Agreement dated June 17, 2020 by and among Arch Resources, Inc. and certain of its subsidiaries, as borrowers, the lenders from time to time party thereto and Regions Bank, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.6 of Arch Resources’s Quarterly Report on Form 10-Q for the period ended September 30, 2020).
10.7	Third Amendment to Credit Agreement dated September 30, 2020, by and among Arch Resources, Inc. and certain of its subsidiaries, as borrowers, the lenders from time to time party thereto and Regions Bank, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.7 of Arch Resources’s Quarterly Report on Form 10-Q for the period ended September 30, 2020).
10.8	Fourth Amendment to Credit Agreement dated May 27, 2021, by and among Arch Resources, Inc. and certain of its subsidiaries, as borrowers, the lenders from time to time party thereto and Regions Bank, in its capacities as administrative agent and as collateral agent (incorporated by reference to Exhibit 10.8 of Arch Resources’s Quarterly Report on Form 10-Q for the period ended June 30, 2021).
10.9	Third Amended and Restated Receivables Purchase Agreement among Arch Receivable Company, LLC, as seller, Arch Coal Sales Company, Inc., as initial servicer, PNC Bank, National Association as administrator and issuer of letters of credit thereunder and the other parties party thereto, as securitization purchasers (incorporated by reference to Exhibit 10.2 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).
10.10	First Amendment to Third Amended and Restated Receivables Purchase Agreement, dated as of April 27, 2017, among Arch Receivable Company, LLC, as seller, Arch Coal Sales Company, Inc., as servicer, PNC Bank, National Association as administrator and issuer of letters of credit thereunder and the other parties party thereto, as securitization purchasers (incorporated by reference to Exhibit 10.2 of Arch Resources’s Current Report on Form 8-K filed on May 2, 2017).
10.11	Second Amendment to Third Amended and Restated Receivables Purchase Agreement, dated as of August 27, 2018, among Arch Receivable Company, LLC, as seller, Arch Coal Sales Company, Inc., as servicer, PNC Bank, National Association as administrator and issuer of letters of credit thereunder and the other parties party thereto, as securitization purchasers (incorporated by reference to Exhibit 10.7 of Arch Resources’s Quarterly Report on Form 10-Q for the period ended September 30, 2018).
10.12	Third Amendment to Third Amended and Restated Receivables Purchase Agreement, dated as of May 1, 2019, among Arch Receivable Company, LLC, as seller, Arch Coal Sales Company, Inc., as servicer, PNC Bank, National Association as administrator and issuer of letters of credit thereunder and the other parties party thereto, as securitization purchasers (incorporated by reference to Exhibit 10.9 of Arch Resources’s Quarterly Report on Form 10-Q for the period ended June 30, 2019).
10.13	Fourth Amendment to Third Amended and Restated Receivables Purchase Agreement, dated September 30, 2020, among Arch Receivable Company, LLC, as seller, Arch Coal Sales Company, Inc., as servicer, PNC Bank, National Association as administrator and issuer of letters of credit thereunder and the other parties party thereto, as securitization purchasers (incorporated by reference to Exhibit 10.12 of Arch Resources’s Quarterly Report on Form 10-Q for the period ended September 30, 2020).
10.14	Fifth Amendment to Third Amended and Restated Receivables Purchase Agreement dated as of December 4, 2020 among Arch Receivable Company, LLC, as seller, Arch Coal Sales Company, Inc., as servicer, PNC Bank, National Association as administrator and issuer of letters of credit thereunder and the other parties party

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	thereto, as securitization purchasers (incorporated by reference to Exhibit 10.13 of Arch Resources’s Quarterly Report on Form 10-Q for the period ended March 31, 2021).
10.15	Sixth Amendment to Third Amended and Restated Receivables Purchase Agreement dated as of October 8, 2021 among Arch Receivable Company, LLC, as seller, Arch Coal Sales Company, Inc., as servicer, PNC Bank, National Association as administrator and issuer of letters of credit thereunder and the other parties party thereto, as securitization purchasers.
10.16	Second Amended and Restated Purchase and Sale Agreement among Arch Resources, Inc. and certain subsidiaries of Arch Resources, Inc., as originators (incorporated by reference to Exhibit 10.3 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).
10.17	First Amendment to the Second Amended and Restated Purchase and Sale Agreement, dated as of December 21, 2016, among Arch Resources, Inc. and certain subsidiaries of Arch Resources, Inc., as originators (incorporated by reference to Exhibit 10.7 of Arch Resources’s Current Report on Form 8-K filed for the period ended September 30, 2017).
10.18	Second Amendment to the Second Amended and Restated Purchase and Sale Agreement, dated as of April 27, 2017, among Arch Resources, Inc. and certain subsidiaries of Arch Resources, Inc., as originators (incorporated by reference to Exhibit 10.3 of Arch Resources’s Current Report on Form 8-K filed on May 2, 2017).
10.19	Third Amendment to Second Amended and Restated Purchase and Sale Agreement, dated as of September 14, 2017, among Arch Resources, Inc. and certain subsidiaries of Arch Resources, Inc., as originators (incorporated by reference to Exhibit 10.16 of Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2020).
10.20	Fourth Amendment to Second Amended and Restated Purchase and Sale Agreement, dated as of December 13, 2019, among Arch Resources, Inc. and certain subsidiaries of Arch Resources, Inc., as originators (incorporated by reference to Exhibit 10.17 of Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2020).
10.21	Fifth Amendment and Waiver to Second Amended and Restated Purchase and Sale Agreement dated June 17, 2020, among Arch Resources, Inc. and certain subsidiaries of Arch Resources, Inc., as originators (incorporated by reference to Exhibit 10.18 of Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2020).
10.22	Sixth Amendment to Second Amended and Restated Purchase and Sale Agreement dated December 31, 2020, among Arch Resources, Inc. and certain subsidiaries of Arch Resources, Inc., as originators (incorporated by reference to Exhibit 10.19 of Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2020).
10.23	Second Amended and Restated Sale and Contribution Agreement between Arch Resources, Inc., as the transferor, and Arch Receivable Company, LLC (incorporated by reference to Exhibit 10.4 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).
10.24	First Amendment to the Second Amended and Restated Sale and Contribution Agreement, dated as of April 27, 2017, between Arch Resources, Inc., as the transferor, and Arch Receivable Company, LLC (incorporated by reference to Exhibit 10.4 of Arch Resources’s Current Report on Form 8-K filed on May 2, 2017).
10.25	Warrant Agreement, dated as of October 5, 2016, between Arch Resources, Inc. and American Stock Transfer & Trust Company, LLC, as Warrant Agent (incorporated by reference to Exhibit 10.5 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).

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10.26	Indemnification Agreement between Arch Resources, Inc. and the directors and officers of Arch Resources, Inc. and its subsidiaries (form) (incorporated by reference to Exhibit 10.6 of Arch Resources’s Current Report on Form 8-K filed on October 11, 2016).
10.27	Registration Rights Agreement between Arch Resources, Inc. and Monarch Alternative Capital LP and certain other affiliated funds (incorporated by reference to Exhibit 10.1 of Arch Resources’s Current Report on Form 8-K filed on November 21, 2016)
10.28	Coal Lease Agreement dated as of March 31, 1992, among Allegheny Land Company, as lessee, and UAC and Phoenix Coal Corporation, as lessors, and related guarantee (incorporated by reference to the Current Report on Form 8-K filed by Ashland Coal, Inc. on April 6, 1992).
10.29	Federal Coal Lease dated as of January 24, 1996 between the U.S. Department of the Interior and the Thunder Basin Coal Company (incorporated by reference to Exhibit 10.20 to Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 1998).
10.30	Federal Coal Lease dated as of November 1, 1967 between the U.S. Department of the Interior and the Thunder Basin Coal Company (incorporated by reference to Exhibit 10.21 to Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 1998).
10.31	Federal Coal Lease effective as of May 1, 1995 between the U.S. Department of the Interior and Mountain Coal Company (incorporated by reference to Exhibit 10.22 to Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 1998).
10.32	Federal Coal Lease dated as of January 1, 1999 between the Department of the Interior and Ark Land Company (incorporated by reference to Exhibit 10.23 to Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 1998).
10.33	Federal Coal Lease effective as of March 1, 2005 by and between the United States of America and Ark Land LT, Inc. covering the tract of land known as “Little Thunder” in Campbell County, Wyoming (incorporated by reference to Exhibit 99.1 to the Current Report on Form 8-K filed by Arch Resources on February 10, 2005).
10.34	Modified Coal Lease (WYW71692) executed January 1, 2003 by and between the United States of America, through the Bureau of Land Management, as lessor, and Triton Coal Company, LLC, as lessee, covering a tract of land known as “North Rochelle” in Campbell County, Wyoming (incorporated by reference to Exhibit 10.24 to Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2004).
10.35	Coal Lease (WYW127221) executed January 1, 1998 by and between the United States of America, through the Bureau of Land Management, as lessor, and Triton Coal Company, LLC, as lessee, covering a tract of land known as “North Roundup” in Campbell County, Wyoming (incorporated by reference to Exhibit 10.25 to Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2004).
10.36*	Letter Agreement dated October 25, 2021 by and between Arch Resources, Inc. and John W. Eaves.
10.37*	Form of Employment Agreement for Executive Officers of Arch Resources, Inc. (incorporated by reference to Exhibit 10.4 of Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2011).
10.38*	Arch Resources, Inc. Deferred Compensation Plan (incorporated by reference to Exhibit 10.26 to Arch Resources’s Annual Report on Form 10-K for the year ended December 31, 2014).
10.39	Arch Resources, Inc. Outside Directors’ Deferred Compensation Plan (incorporated by reference to Exhibit 10.4 of Arch Resources’s Current Report on Form 8-K filed on December 12, 2008).

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10.40*	Arch Resources, Inc. Supplemental Retirement Plan (as amended on December 5, 2008) (incorporated by reference to Exhibit 10.2 to Arch Resources’s Current Report on Form 8-K filed on December 12, 2008).
10.41*	Arch Resources, Inc. 2016 Omnibus Incentive Plan (incorporated by reference to Exhibit 99.1 to Arch Resources’s Registration Statement on Form S-8 filed on November 1, 2016).
10.42*	Form of Restricted Stock Unit Contract (Time-Based Vesting) (incorporated by reference to Exhibit 10.1 to Arch Resources’s Current Report on Form 8-K filed on November 30, 2016).
10.43*	Form of Restricted Stock Unit Contract (Performance-Based Vesting) (incorporated by reference to Exhibit 10.2 to Arch Resources’s Current Report on Form 8-K filed on November 30, 2016).
10.44	Stock Repurchase Agreement dated September 13, 2017, among Arch Resources, Inc. and Monarch Alternative Solutions Master Fund Ltd, Monarch Capital Master Partners III LP, MCP Holdings Master LP, Monarch Debt Recovery Master Fund Ltd and P Monarch Recovery Ltd. (incorporated by reference to Exhibit 10.1 of Arch Resources’s Current Report on Form 8-K filed on September 19, 2017).
10.45	Stock Repurchase Agreement dated December 8, 2017, among Arch Resources, Inc. and Monarch Alternative Solutions Master Fund Ltd, Monarch Capital Master Partners III LP, MCP Holdings Master LP, and Monarch Debt Recovery Master Fund Ltd (incorporated by reference to Exhibit 10.1 of Arch Resources’s Current Report on Form 8-K filed on December 11, 2017).
10.46*	Form of Cash Retention Award Agreement for the Chief Executive Officer, Chief Operating Officer and Chief Financial Officer of the Company (incorporated by reference to Exhibit 10.37 to Arch Resources’s Annual Report on Form 10-K for the year ended 2018).
31.1	Rule 13a-14(a)/15d-14(a) Certification of Paul A. Lang.
31.2	Rule 13a-14(a)/15d-14(a) Certification of Matthew C. Giljum.
32.1	Section 1350 Certification of Paul A. Lang.
32.2	Section 1350 Certification of Matthew C. Giljum.
95	Mine Safety Disclosure Exhibit.
101	The following financial statements from the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2021, formatted in Inline XBRL: (1) Condensed Consolidated Statement of Operations, (2) Condensed Consolidated Statements of Comprehensive Income (Loss), (3) Condensed Consolidated Balance Sheets, (4) Condensed Consolidated Statements of Cash Flows, (5) Condensed Consolidated Statements of Stockholders’ Equity and (6) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text and including detailed tags.
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

* Denotes a management contract or compensatory plan or arrangement.

54

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Arch Resources, Inc.
By:	/s/ Matthew C. Giljum
	Matthew C. Giljum
	Senior Vice President and Chief Financial Officer (On behalf of the registrant and as Principal Financial Officer)
	October 26, 2021

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EX-10.15

EXHIBIT 10.15

SIXTH AMENDMENT TO THIRD AMENDED AND RESTATED

RECEIVABLES PURCHASE AGREEMENT

THIS SIXTH AMENDMENT TO THIRD AMENDED AND RESTATED RECEIVABLES PURCHASE AGREEMENT (this “Amendment”), dated as of October 8, 2021, is entered into among ARCH RECEIVABLE COMPANY, LLC (the “Seller”), ARCH COAL SALES COMPANY, INC. (the “Servicer”), the various financial institutions party to the Agreement (as defined below) as Conduit Purchasers (the “Conduit Purchasers”), as Related Committed Purchasers (the “Related Committed Purchasers”), as LC Participants (the “LC Participants”), and as Purchaser Agents (the “Purchaser Agents”), and PNC BANK, NATIONAL ASSOCIATION (“PNC”), as Administrator (the “Administrator”) and as LC Bank (the “LC Bank”; together with the Conduit Purchasers, the Related Committed Purchasers and the LC Participants, the “Purchasers”).

RECITALS

1.The parties hereto are parties to the Third Amended and Restated Receivables Purchase Agreement, dated as of October 5, 2016 (as amended, restated, supplemented or otherwise modified through the date hereof, the “Agreement”).

2.The parties hereto desire to amend the Agreement as hereinafter set forth.

NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties agree as follows:

SECTION 1.Certain Defined Terms.  Capitalized terms that are used but not defined herein shall have the meanings set forth in the Agreement.

SECTION 2.Amendment to the Agreement.  

2.1Exhibit I of the Agreement is hereby amended by adding the following defined term in appropriate alphabetical order:

“Tier 1 Eligible Foreign Obligor” means an Obligor which is a resident of any country (other than the United States of America) that has a short-term foreign currency rating (or, if such country does not have such a short-term foreign currency rating, a long-term foreign currency rating) of at least “A2” (or “A”) by Standard & Poor’s and “P-1” (or “A2”) by Moody’s.

“Tier 2 Eligible Foreign Obligor” means any Eligible Foreign Obligor that is not a Tier 1 Eligible Foreign Obligor.

2.2The definition of “Concentration Percentage” set forth in Exhibit I of the Agreement is hereby amended in its entirety by amending and restating it as follows:

“Concentration Percentage” means: (a) for any Group A Obligor, 25%, (b) for any Group B Obligor, 20%, (c) for any Group C Obligor, 10% and (d) for any Group D Obligor, 5%.

743954167 15494375

2.3The definition of “Eligible Foreign Obligor” set forth in Exhibit I of the Agreement is hereby amended in its entirety by amending and restating it as follows:

“Eligible Foreign Obligor” means an Obligor which is a resident of any country (other than the United States of America) that is not a Sanctioned Country.

2.4The definition of “Exception Account” set forth in Exhibit I of the Agreement is hereby amended in its entirety by amending and restating it as follows:

“Exception Account”: means the deposit account maintained at PNC in the name of Arch Coal Sales Company, Inc. with the following account number: 1082061214.

2.5The definition of “Exception Account Conditions” set forth in Exhibit I of the Agreement is hereby amended in its entirety by amending and restating it as follows:

“Exception Account Conditions” means, as of any date of determination, the satisfaction of each of the following: (a) no Termination Event has occurred and is continuing, (b) all Collections on Pool Receivables received in any Exception Account are then being swept directly to a Collection Account no later than one (1) Business Day following receipt and identification thereof pursuant to a zero account balance arrangement or an automatic daily sweep arrangement established with PNC, (c) each Exception Account is maintained at PNC and subject to a Lock-Box Agreement in favor of the Administrator, (d) no Exception Account is subject to any account control agreement or similar agreement granting (or purporting to grant) any Person (other than the Administrator) “control” (as defined in Section 9-104 of the UCC) over such Exception Account and (e) no amounts other than Collections on Receivables the Obligor of which is Hyundai Steel Company or another Obligor approved in writing by the Administrator in its sole discretion are being deposited in any Exception Account.

2.6The definition of “Excess Concentration” set forth in Exhibit I of the Agreement is hereby amended in its entirety by amending and restating it as follows:

“Excess Concentration” means the sum, without duplication, of the following amounts:

(i) the amount by which the Outstanding Balance of Eligible Receivables of each Obligor then in the Receivables Pool exceeds an amount equal to the Concentration Percentage for such Obligor multiplied by the Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(ii) the sum of (a) the amount by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool that have a stated maturity which is more than 45 days but not more than 60 days from the original invoice date of such Eligible Receivables exceeds 35% (or solely during a Minimum Liquidity Period, such lesser percentage (not to be reduced below 10%) from time to time designated by the Administrator or any Purchaser Agent in its sole

2

discretion in a written notice delivered to Seller and each Purchaser Agent) of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool plus (b) the amount by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool that have a stated maturity which is more than 60 days after the original invoice date of such Eligible Receivables exceeds 20% (or solely during a Minimum Liquidity Period, such lesser percentage from time to time designated by the Administrator or any Purchaser Agent in its sole discretion in a written notice delivered to Seller and each Purchaser Agent) of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(iii) the amount by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool the Obligor of which is a Tier 1 Eligible Foreign Obligor exceeds 35% of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(iv)the amount by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool the Obligor of which is a Tier 2 Eligible Foreign Obligor exceeds 3% of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(v) the amount by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool the coal with respect to which has been shipped but not yet billed for more than 30 days but not more than 60 days from shipment exceeds 10% of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(vi) the amount by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool the coal with respect to which has been shipped but not yet billed exceeds 50% of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool; plus

(vii) the amount by which the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool the Collections with respect thereto were deposited in an Exception Account exceeds 12.5% (or such lesser percentage from time to time designated by the Administrator or any Purchaser Agent in its sole discretion in a written notice delivered to Seller and each Purchaser Agent) of the aggregate Outstanding Balance of all Eligible Receivables then in the Receivables Pool;

provided, that, for purposes of determining the “Excess Concentration” pursuant to clause (i) above, with respect to any Eligible Receivable that is supported by an Eligible Supporting Letter of Credit or any Eligible Receivable that is an Insured Designated Receivable, the “Obligor” thereof shall be deemed to be the related Eligible Supporting Letter of Credit Provider or Eligible Credit Insurance Provider, as applicable, provided, further that, for purposes of determining the “Excess Concentration” pursuant to clause (iii) or (iv) above, with respect to any Eligible

3

Receivable that is supported by an Eligible Supporting Letter of Credit or any Eligible Receivable that is an Insured Designated Receivable, the “Obligor” thereof shall be deemed to be the related Eligible Supporting Letter of Credit Provider or Eligible Credit Insurance Provider, as applicable (and, with respect to any Eligible Receivable that is supported by an Eligible Supporting Letter of Credit or any Eligible Receivable that is an Insured Designated Receivable, such Obligor shall be deemed to be organized under the laws of the country in which the office from which it is obligated to make payment with respect to such Eligible Supporting Letter of Credit or Eligible Credit Insurance is located) and provided, further that (x) if any Pool Receivable is partially supported by an Eligible Supporting Letter of Credit, then the “Obligor” thereof shall be deemed to be (i) with respect to the Unsupported Outstanding Balance of such Pool Receivable, the Obligor of such Pool Receivable and (ii) with respect to the Supported Outstanding Balance of such Pool Receivable, the related Eligible Supporting Letter of Credit Provider and (y) if any Pool Receivable is an Insured Designated Receivable, the “Obligor” thereof shall be deemed to be (i) with respect to the Insured Amount of such Insured Designated Receivable, the related Eligible Credit Insurance Provider and (ii) with respect to the remaining Outstanding Balance of such Insured Designated Receivable, the Obligor of such Insured Receivable.

2.7Clause (k) of Section 1 of Exhibit IV of the Agreement is amended by striking the last sentence thereof.

2.8Clause (j) of Section 2 of Exhibit IV of the Agreement is amended by striking the last sentence thereof.

2.9Exhibit V of the Agreement is amended by adding the following new clause (s) thereto and, in connection therewith, deleting the “.” at the end of clause (r) thereof and substituting “; or” therefor:

(s) clause (b) of the Exception Account Conditions shall cease to be satisfied without the prior written consent of the Administrator (not to be unreasonably withheld, conditioned or delayed) unless, promptly after the Servicer obtains knowledge thereof, the Servicer shall have delivered a revised Information Package identifying each Receivable the Obligor of which has been instructed to make payments to an Exception Account or made its most recent remittance of Collections to an Exception Account with information sufficient to re-determine the Purchased Interest without such Receivables included as Eligible Receivables.

SECTION 3.Representations and Warranties.  Each of the Seller and the Servicer hereby represents and warrants to the Administrator, the Purchaser Agents and the Purchasers as follows:

(a)Representations and Warranties.  The representations and warranties made by such Person in the Agreement and each of the other Transaction Documents are true and correct as of the date hereof (unless stated to relate solely to an earlier date, in which case such representations or warranties were true and correct as of such earlier date).

4

(b)Enforceability.  The execution and delivery by such Person of this Amendment, and the performance of each of its obligations under this Amendment and the Agreement, as amended hereby, are within each of its organizational powers and have been duly authorized by all necessary action on its part.  This Amendment and the Agreement, as amended hereby, are such Person’s valid and legally binding obligations, enforceable in accordance with their respective terms.

(c)No Default. Both before and immediately after giving effect to this Amendment and the transactions contemplated hereby, no Termination Event or Unmatured Termination Event exists or shall exist.

SECTION 4.Effect of Amendment; Ratification.  All provisions of the Agreement, as expressly amended and modified by this Amendment, shall remain in full force and effect.  After this Amendment becomes effective, all references in the Agreement (or in any other Transaction Document) to “the Receivables Purchase Agreement”, “this Agreement”, “hereof”, “herein” or words of similar effect, in each case referring to the Agreement shall be deemed to be references to the Agreement as amended by this Amendment. This Amendment shall not be deemed, either expressly or impliedly, to waive, amend or supplement any provision of the Agreement other than as specifically set forth herein.  The Agreement, as amended by this Amendment, is hereby ratified and confirmed in all respects.

SECTION 5.Effectiveness.  This Amendment shall become effective as of the date hereof, upon receipt by the Administrator of duly executed counterparts of the Amendment.

SECTION 6.Counterparts.  This Amendment may be executed in any number of counterparts and by different parties on separate counterparts, each of which when so executed shall be deemed to be an original and all of which when taken together shall constitute but one and the same instrument.  Delivery of an executed counterpart of a signature page to this Amendment by facsimile or electronic transmission shall be effective as delivery of a manually executed counterpart hereof.

SECTION 7.Governing Law.  This Amendment shall be governed by, and construed in accordance with, the internal laws of the State of New York (including for such purposes Sections 5-1401 and 5-1402 of the General Obligations Law of the State of New York).

SECTION 8.Section Headings.  The various headings of this Amendment are included for convenience only and shall not affect the meaning or interpretation of this Amendment, the Agreement or any provision hereof or thereof.

SECTION 9.Successors and Assigns.  This Amendment shall be binding upon and shall inure to the benefit of the parties hereto and their respective successors and permitted assigns.

SECTION 10.Ratification.  After giving effect to this Amendment and the transactions contemplated by this Amendment, all of the provisions of the Performance Guaranty shall remain in full force and effect and the Performance Guarantor hereby ratifies and affirms the Performance Guaranty and acknowledges that the Performance Guaranty has continued and shall continue in full force and effect in accordance with its terms.

5

SECTION 11.Transaction Document.  For the avoidance of doubt, each party hereto agrees that this Amendment constitutes a Transaction Document.

SECTION 12.Severability.  Each provision of this Amendment shall be severable from every other provision of this Amendment for the purpose of determining the legal enforceability of any provision hereof, and the unenforceability of one or more provisions of this Amendment in one jurisdiction shall not have the effect of rendering such provision or provisions unenforceable in any other jurisdiction.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

6

IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first written above.

ARCH RECEIVABLE COMPANY, LLC,
as Seller

By: /s/ Matthew C. Giljum
Name:Matthew C. Giljum

Title:Vice President & Treasurer

ARCH COAL SALES COMPANY, INC.,
as Servicer

By: /s/ Matthew C. Giljum

Name:Matthew C. Giljum

Title:Vice President & Treasurer

ARCH RESOURCES, INC.,
as Performance Guarantor

By: /s/ Matthew C. Giljum

Name:Matthew C. Giljum

Title: Senior Vice President & Chief Operating Officer

PNC BANK, NATIONAL ASSOCIATION,

as Administrator

By: /s/ Deric Bradford
Name:Deric Bradford

Title:Managing Director

PNC BANK, NATIONAL ASSOCIATION,

as a Purchaser Agent

By: /s/ Deric Bradford

Name:Deric Bradford

Title: Managing Director

PNC BANK, NATIONAL ASSOCIATION,

as the LC Bank and as an LC Participant

By: /s/ Deric Bradford

Name:Deric Bradford

Title: Managing Director

PNC BANK, NATIONAL ASSOCIATION,

as a Related Committed Purchaser

By: /s/ Deric Bradford
Name:Deric Bradford

Title: Managing Director

REGIONS BANK,
as a Purchaser Agent


By: /s/ Mark A. Kassis
Name: Mark A. Kassis

Title: Managing Director

REGIONS BANK,
as a Related Committed Purchaser


By: /s/ Mark A. Kassis
Name: Mark A. Kassis

Title: Managing Director

REGIONS BANK,
as an LC Participant


By: /s/ Mark A. Kassis
Name: Mark A. Kassis

Title: Managing Director

EX-10.36

John A. Ziegler, Jr.

Senior Vice President & Chief Administrative Officer

(314) 994-2759

jziegler@archrsc.com

October 25, 2021

Mr. John W. Eaves

2460 Lantern Lane

Naples, FL 34102

Dear John:

The purpose of this amended and restated letter agreement is to extend the term of your service as Executive Chairman of the Board of Directors of Arch Resources, Inc. (the “Company”) from February 27, 2023 to December 31, 2023, as well as to reflect the special performance achievement award granted to you on October 13, 2021. All other terms of this amended and restated letter agreement are consistent with your original letter agreement, dated April 30, 2020 regarding your transition from Chief Executive Officer of the Company to Executive Chairman. Such transition has and will occur on the following terms and conditions:

● On April 30, 2020, you resigned as Chief Executive Officer of the Company and assumed the role of Executive Chairman.

● As Executive Chairman, you are and will remain a full-time employee of the Company and shall have such duties, responsibilities and authorities customarily associated with such position. Your employment with the Company will continue to be “at will,” meaning that either you or the Company will be entitled to terminate your employment at any time, with or without cause, subject to the terms of the Letter Agreement (as defined below).

● Your compensation as Executive Chairman will consist of the following components:

1. Base Salary: You will receive an annual base salary of $540,000, pro-rated for any partial year of service as Executive Chairman.

2. Annual Bonus: You will be eligible to participate in the Company’s Annual Incentive Compensation Plan with a target bonus opportunity of 100% of your annual base salary.

3. LTIP: You will be eligible to receive Long-Term Incentive Plan (LTIP) awards with an annual target award amount of 200% of your annual base salary.

◾ Future LTIP Grants. For the avoidance of doubt, subject to your continued service as Executive Chairman through the date of grant, you will be eligible to receive the annual LTIP awards currently planned for February 2022 and February 2023, which awards will be subject to the terms and conditions of the Company’s 2016 Omnibus Incentive Plan (the “2016

Plan”) and the applicable award agreements evidencing such awards. You will be eligible for pro-rated retirement vesting under and pursuant to the terms of the applicable LTIP awards should you retire prior to fully vesting in such awards.

◾ Outstanding LTIP Awards. You will continue to vest in your outstanding LTIP awards while serving as Executive Chairman, subject to the terms and conditions of the 2016 Plan and the applicable award agreements. If you should depart from the Company prior to February 27, 2023 for any reason other than for Cause (as defined in your Letter Agreement), your outstanding 2020 LTIP award, granted February 27, 2020, will vest in full, subject to the achievement of the performance measures set forth in the 2020 LTIP award.

4. Special Performance Achievement Award: If your service is terminated by the Company for any reason other than for Cause (as defined in your Letter Agreement) prior to October 13, 2023, your outstanding Special Performance Achievement Award (the “Achievement Award”) granted on October 13, 2021, will vest in full. If you terminate your service for any reason prior to October 13, 2023, the Achievement Award will vest on a pro rata basis.

5. Employee Benefits: You will remain eligible to participate in the employee benefit plans and programs offered to other employees of the Company, consistent with the terms thereof and as such plans and programs may be amended from time to time.

● You will serve as Executive Chairman until your retirement on December 31, 2023, or your earlier removal or resignation.

● The terms of that certain letter agreement between you and the Company dated April 26, 2012 (the “Letter Agreement”) regarding certain severance payments and benefit to which you may be entitled following a qualifying termination of employment shall continue in full force and effect, including any restrictive covenants contained therein. The terms of your indemnification agreement with the Company shall remain in full force and effect.

● The Company may withhold from any amounts payable to you hereunder all federal, state, city or other taxes or deductions that the Company reasonably determines are required to be withheld pursuant to any applicable law or regulation.

If this document correctly sets forth our agreement on the subject matter hereof, please sign and return to the Company the enclosed copy of this agreement which will then constitute our agreement on this matter and supersede in its entirety the letter agreement between you and the Company dated April 30, 2020.

Sincerely,

2

ARCH RESOURCES, INC.

By: /s/John A. Ziegler, Jr.                   
John A. Ziegler, Jr.

Sr. Vice President & Chief Administrative Officer

ACKNOWLEDGED AND ACCEPTED as
of this 25th day of October, 2021.

/s/ John W. Eaves  

John W. Eaves

3

EX-31.1

EXHIBIT 31.1

Certification

I, Paul A. Lang, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Arch Resources, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Paul A. Lang

Paul A. Lang

Chief Executive Officer, Director

Date: October 26, 2021

EX-31.2

EXHIBIT 31.2

Certification

I, Matthew C. Giljum, certify that:

1.I have reviewed this quarterly report on Form 10-Q of Arch Resources, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

/s/ Matthew C. Giljum

Matthew C. Giljum

Senior Vice President and Chief Financial Officer

Date: October 26, 2021

EX-32.1

EXHIBIT 32.1

Certification of Periodic Financial Reports

I, Paul A. Lang, Chief Executive Officer, Director of Arch Resources, Inc., certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)the Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021 (the “Periodic Report”) which this statement accompanies fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2)information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of Arch Resources, Inc.

/s/ Paul A. Lang

Paul A. Lang

Chief Executive Officer, Director

Date: October 26, 2021

EX-32.2

EXHIBIT 32.2

Certification of Periodic Financial Reports

I, Matthew C. Giljum, Senior Vice President and Chief Financial Officer of Arch Resources, Inc., certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)the Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021 (the “Periodic Report”) which this statement accompanies fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2)information contained in the Periodic Report fairly presents, in all material respects, the financial condition and results of operations of Arch Resources, Inc.

/s/ Matthew C. Giljum

Matthew C. Giljum

Senior Vice President and Chief Financial Officer

Date: October 26, 2021

EX-95

EXHIBIT 95

Mine Safety and Health Administration Safety Data

We believe that Arch Resources, Inc. (“Arch Resources”) is one of the safest coal mining companies in the world.  Safety is a core value at Arch Resources and at our subsidiary operations.  We have in place a comprehensive safety program that includes extensive health & safety training for all employees, site inspections, emergency response preparedness, crisis communications training, incident investigation, regulatory compliance training and process auditing, as well as an open dialogue between all levels of employees.  The goals of our processes are to eliminate exposure to hazards in the workplace, ensure that we comply with all mine safety regulations, and support regulatory and industry efforts to improve the health and safety of our employees along with the industry as a whole.

The operation of our mines is subject to regulation by the Federal Mine Safety and Health Administration (MSHA) under the Federal Mine Safety and Health Act of 1977 (Mine Act).  MSHA inspects our mines on a regular basis and issues various citations, orders and violations when it believes a violation has occurred under the Mine Act.  We present information below regarding certain mining safety and health violations, orders and citations, issued by MSHA and related assessments and legal actions and mine-related fatalities with respect to our coal mining operations.  In evaluating the above information regarding mine safety and health, investors should take into account factors such as: (i) the number of citations and orders will vary depending on the size of a coal mine, (ii) the number of citations issued will vary from inspector to inspector and mine to mine, and (iii) citations and orders can be contested and appealed, and in that process are often reduced in severity and amount, and are sometimes dismissed or vacated.

The table below sets forth for the three months ended September 30, 2021 for each active MSHA identification number of Arch Resources and its subsidiaries, the total number of: (i) violations of mandatory health or safety standards that could significantly and substantially contribute to the cause and effect of a coal or other mine safety or health hazard under section 104 of the Mine Act for which the operator received a citation from MSHA; (ii) orders issued under section 104(b) of the Mine Act; (iii) citations and orders for unwarrantable failure of the mine operator to comply with mandatory health or safety standards under section 104(d) of the Mine Act; (iv) flagrant violations under section 110(b)(2) of the Mine Act; (v) imminent danger orders issued under section 107(a) of the Mine Act; (vi) proposed assessments from MHSA (regardless of whether Arch Coal has challenged or appealed the assessment); (vii) mining-related fatalities; (viii) notices from MSHA of a pattern of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of coal or other mine health or safety hazards under section 104(e) of the Mine Act; (ix) notices from MSHA regarding the potential to have a pattern of violations as referenced in (viii) above; and (x) pending legal actions before the Federal Mine Safety and Health Review Commission (as of September 30, 2021) involving such coal or other mine, as well as the aggregate number of legal actions instituted and the aggregate number of legal actions resolved during the reporting period.

1

Mine or Operating Name / MSHA Identification Number	Section 104 S&S Citations (#)	Section 104(b) Orders (#)	Section 104(d) Citations and Orders (#)	Section 110(b)(2) Violations (#)	Section 107(a) Orders (#)	Total Dollar Value of MSHA Assessments Proposed (in thousands) ($)	Total Number of Mining Related Fatalities (#)	Received Notice of Pattern of Violations Under Section 104(e) (Yes/No)	Received Notice of Potential to Have Pattern of Violations Under Section 104(e) (Yes/No)	Legal Actions Initiated During Period (#)	Legal Actions Resolved During Period (#)	Legal Actions Pending as of Last Day of Period(1) (#)
Active Operations
Vindex Cabin Run / 18-00133	—	—	—	—	—	—	—	No	No	—	—	—
Vindex Bismarck / 46-09369	—	—	—	—	—	—	—	No	No	—	—	—
Vindex Jackson Mt. / 18-00170	—	—	—	—	—	—	—	No	No	—	—	—
Vindex Wolf Den Run / 18-00790	—	—	—	—	—	—	—	No	No	—	—	—
Vindex Energy / Vindex / 46-02151	—	—	—	—	—	—	—	No	No	—	—	—
Vidnex Energy / Carlos Surface / 18-00769	—	—	—	—	—	—	—	No	No	—	—	—
Vindex Energy / Douglas Island / 18-00749	—	—	—	—	—	—	—	No	No	—	—	—
Vindex Energy / Dobbin Ridge Prep Plant / 46-07837	—	—	—	—	—	—	—	No	No	—	—	—
Vindex Energy / Frostburg Blend Yard / 18-00709	—	—	—	—	—	—	—	No	No	—	—	—
Beckley Pocahontas Mine / 46-05252	8	—	—	—	—	31.1	—	No	No	3	2	3
Beckley Pocahontas Plant / 46-09216	—	—	—	—	—	—	—	No	No	—	1	—
Coal Mac Holden #22 Prep Plant / 46-05909	—	—	—	—	—	—	—	No	No	—	—	—
Coal Mac Ragland Loadout / 46-08563	—	—	—	—	—	—	—	No	No	—	—	—
Coal Mac Holden #22 Surface / 46-08984	—	—	—	—	—	—	—	No	No	—	—	—
Eastern Birch River Mine / 46-07945	—	—	—	—	—	0.1	—	No	No	—	—	—
Sentinel Mine / 46-04168	31	2	—	—	—	144.4	—	No	No	—	—	—
Sentinel Prep Plant / 46-08777	—	—	—	—	—	—	—	No	No	—	—	—

2

Mingo Logan Mountaineer II / 46-09029	33	—	3	—	-—	91.7	—	No	No	9	7	6
Mingo Logan Cardinal Prep Plant / 46-09046	4	—	—	—	—	2.3	—	No	No	1	1	2
Mingo Logan Daniel Hollow / 46-09047	—	—	—	—	—	—	—	No	No	—	—	—
Leer #1 Mine / 46-09192	—	—	—	—	—	5.7	—	No	No	1	—	1
Arch of Wyoming Elk Mountain / 48-01694	—	—	—	—	—	—	—	No	No	—	—	—
Black Thunder / 48-00977	—	—	—	—	—	2.2	1	No	No	1	—	1
Coal Creek / 48-01215	—	—	—	—	—	1.5	—	No	No	—	—	—
West Elk Mine / 05-03672	6	—	—	—	—	27.1	—	No	No	—	—	—
Leer #1 Prep Plant / 46-09191	—	—	—	—	—	—	—	No	No	—	—	—
Wolf Run Mining – Sawmill Run Prep Plant / 46-05544	—	—	—	—	—	—	—	No	No	—	—	—
Wolf Run Mining / Imperial / 46-09115	—	—	—	—	—	—	—	No	No	—	—	—
Wolf Run Mining / Upshur / 46-05823	—	—	—	—	—	—	—	No	No	—	—	—

3

(1) See table below for additional details regarding Legal Actions Pending as of September 30, 2021.

Mine or Operating Name/MSHA Identification Number	Contests of Citations, Orders (as of September 30, 2021)	Contests of Proposed Penalties (as of September 30, 2021)	Complaints for Compensation (as of September 30, 2021)	Complaints of Discharge, Discrimination or Interference (as of September 30, 2021)	Applications for Temporary Relief (as of September 30, 2021)	Appeals of Judges’ Decisions or Orders (as of September 30, 2021)
Beckley Pocahontas Mine / 46-05252	—	3	—	—	—	—
Mingo Logan Mountaineer II / 46-09029	2	4	—	—	—	—
Mingo Logan/Cardinal Prep/49-09046	—	2	—	—	—	—
ICG Tygart Valley/Leer Mine/46-09192	—	1	—	—	—	—
Thunder Basin/Black Thunder/48-00977	1

4

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 18, 2021
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	1-13105
Entity Registrant Name	Arch Resources, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	43-0921172
Entity Address, Address Line One	One CityPlace Drive
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63141
City Area Code	314
Local Phone Number	994-2700
Title of 12(b) Security	Common stock, $.01 par value
Trading Symbol	ARCH
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business Company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		15,316,069
Amendment Flag	false
Entity Central Index Key	0001037676
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3

XML

Condensed Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Condensed Consolidated Income Statements
Revenues	$ 594,412	$ 382,261	$ 1,402,345	$ 1,107,014
Costs, expenses and other operating
Cost of sales (exclusive of items shown separately below)	423,826	345,539	1,089,061	1,036,886
Depreciation, depletion and amortization	30,760	32,630	84,441	94,105
Accretion on asset retirement obligations	5,437	4,947	16,311	14,939
Change in fair value of coal derivatives and coal trading activities, net	19,641	2,649	28,931	3,263
Selling, general and administrative expenses	21,081	21,541	66,679	64,024
Costs related to proposed joint venture with Peabody Energy		4,423		15,938
Asset impairment and restructuring		163,106		176,371
Gain on property insurance recovery related to Mountain Laurel longwall				(23,518)
Gain on divestitures				(1,369)
Other operating income, net	(1,731)	(4,894)	(11,344)	(16,768)
Costs, expenses and other operating	499,014	569,941	1,274,079	1,363,871
Income (loss) from operations	95,398	(187,680)	128,266	(256,857)
Interest expense, net
Interest expense	(6,151)	(2,989)	(13,220)	(9,900)
Interest and investment income		459	474	3,511
Interest expense, net	(6,151)	(2,530)	(12,746)	(6,389)
Income (loss) before nonoperating expenses	89,247	(190,210)	115,520	(263,246)
Nonoperating (expenses) income
Non-service related pension and postretirement benefit costs	(1,186)	(878)	(3,252)	(3,076)
Reorganization items, net				26
Nonoperating (expenses) income	(1,186)	(878)	(3,252)	(3,050)
Income (loss) before income taxes	88,061	(191,088)	112,268	(266,296)
Provision for (benefit from) income taxes	(1,082)	379	1,301	(206)
Net income (loss)	$ 89,143	$ (191,467)	$ 110,967	$ (266,090)
Net income (loss) per common share
Basic earnings (loss) per share (in dollars per share)	$ 5.83	$ (12.64)	$ 7.26	$ (17.57)
Diluted earnings (loss) per share (in dollars per share)	$ 4.92	$ (12.64)	$ 6.49	$ (17.57)
Weighted average shares outstanding
Basic weighted average shares outstanding (in shares)	15,302	15,147	15,293	15,144
Diluted weighted average shares outstanding (in shares)	18,105	15,147	17,101	15,144
Dividends declared per common share (in dollars per share)				$ 0.50

XML

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 89,143	$ (191,467)	$ 110,967	$ (266,090)
Derivative instruments
Comprehensive income (loss) before tax	299	476	1,626	(1,830)
Other comprehensive income (loss), derivative instruments, net of tax	299	476	1,626	(1,830)
Pension, postretirement and other post-employment benefits
Comprehensive income (loss) before tax	2,189	4,164	6,698	(12,439)
Other comprehensive income (loss), pension, postretirement and other post-employment benefits, net of tax	2,189	4,164	6,698	(12,439)
Available-for-sale securities
Comprehensive income (loss) before tax	135	(255)	220	(189)
Other comprehensive income (loss), available-for-sale securities, net of tax	135	(255)	220	(189)
Total other comprehensive income (loss)	2,623	4,385	8,544	(14,458)
Total comprehensive income (loss)	$ 91,766	$ (187,082)	$ 119,511	$ (280,548)

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Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 189,707	$ 187,492
Short-term investments	20,084	96,765
Restricted Cash	1,101	5,953
Trade accounts receivable (net of $0 allowance at September 30, 2021 and December 31, 2020)	226,206	110,869
Other receivables	3,573	3,053
Inventories	155,870	126,008
Other current assets	52,098	58,000
Total current assets	648,639	588,140
Property, plant and equipment
Property, plant and equipment, net	1,135,399	1,007,303
Other assets
Equity investments	80,016	71,783
Other noncurrent assets	66,895	55,246
Total other assets	146,911	127,029
Total assets	1,930,949	1,722,472
Current Liabilities
Accounts payable	102,025	103,743
Accrued expenses and other current liabilities	198,268	155,256
Current maturities of debt	138,587	31,097
Total current liabilities	438,880	290,096
Long-term debt	416,446	477,215
Asset retirement obligations	210,843	230,732
Accrued pension benefits	1,527	2,879
Accrued postretirement benefits other than pension	93,317	94,388
Accrued workers' compensation	249,594	244,695
Other noncurrent liabilities	105,699	98,906
Total liabilities	1,516,306	1,438,911
Stockholders' equity
Common stock, $0.01 par value, authorized 300,000 shares, issued 25,394 and 25,323 shares at September 30, 2021 and December 31, 2020, respectively	254	253
Paid-in capital	779,013	767,484
Retained earnings	489,914	378,906
Treasury stock, 10,088 shares at September 30, 2021 and December 31, 2020, respectively, at cost	(827,381)	(827,381)
Accumulated other comprehensive loss	(27,157)	(35,701)
Total stockholders' equity	414,643	283,561
Total liabilities and stockholders' equity	$ 1,930,949	$ 1,722,472

XML

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Condensed Consolidated Balance Sheets
Trade accounts receivable, allowance	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	25,394,000	25,323,000
Treasury stock, shares (in shares)	10,088,000	10,088,000

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities
Net income (loss)	$ 110,967	$ (266,090)
Adjustments to reconcile to cash from operating activities:
Depreciation, depletion and amortization	84,441	94,105
Accretion on asset retirement obligations	16,311	14,939
Deferred income taxes	11	14,227
Employee stock-based compensation expense	12,841	13,907
Amortization relating to financing activities	4,801	3,189
Gain on property insurance recovery related to Mountain Laurel longwall		(23,518)
Gain on disposals and divestitures, net	(857)	(3,460)
Reclamation work completed	(36,200)	(10,423)
Non-cash asset impairment and restructuring		163,088
Changes in:
Receivables	(115,858)	47,416
Inventories	(29,862)	(12,499)
Accounts payable, accrued expenses and other current liabilities	12,827	(50,474)
Income taxes, net	1,247	22,855
Other	30,913	48,652
Cash provided by operating activities	91,582	55,914
Investing activities
Capital expenditures	(212,046)	(205,661)
Minimum royalty payments	(1,186)	(1,186)
Proceeds from disposals and divestitures	1,135	856
Purchases of short-term investments		(76,593)
Proceeds from sales of short-term investments	81,986	148,670
Investments in and advances to affiliates, net	(2,723)	(1,549)
Proceeds from property insurance recovery related to Mountain Laurel longwall		23,518
Cash used in investing activities	(132,834)	(111,945)
Financing activities
Payments on term loan	(2,250)	(2,250)
Proceeds from equipment financing	19,438	53,611
Proceeds from tax exempt bonds	44,985	53,090
Net payments on other debt	(20,208)	(19,347)
Debt financing costs	(2,057)	(3,528)
Dividends paid		(7,645)
Payments for taxes related to net share settlement of equity awards	(1,293)	(346)
Cash provided by financing activities	38,615	73,585
(Decrease) increase in cash and cash equivalents, including restricted cash	(2,637)	17,554
Cash and cash equivalents, including restricted cash, beginning of period	193,445	153,020
Cash and cash equivalents, including restricted cash, end of period	190,808	170,574
SUPPLEMENTAL CASH FLOW INFORMATION
Cash and cash equivalents	189,707	156,655
Restricted Cash	1,101	13,919
Cash and cash equivalents, including restricted cash	$ 190,808	$ 170,574

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Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock, at cost	Accumulated Other Comprehensive Income (Loss)	Total
Beginning Balance at Dec. 31, 2019	$ 252	$ 730,551	$ 731,425	$ (827,381)	$ 5,689	$ 640,536
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends on common shares			(7,834)			(7,834)
Total comprehensive income (loss)			(25,299)		(17,403)	(42,702)
Employee stock-based compensation		3,962				3,962
Common stock withheld related to net share settlement of equity awards		(198)				(198)
Ending Balance at Mar. 31, 2020	252	734,315	698,292	(827,381)	(11,714)	593,764
Beginning Balance at Dec. 31, 2019	252	730,551	731,425	(827,381)	5,689	640,536
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)						(280,548)
Ending Balance at Sep. 30, 2020	252	744,112	457,432	(827,381)	(8,769)	365,646
Beginning Balance at Mar. 31, 2020	252	734,315	698,292	(827,381)	(11,714)	593,764
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)			(49,324)		(1,440)	(50,764)
Employee stock-based compensation		4,891				4,891
Common stock withheld related to net share settlement of equity awards		(50)				(50)
Dividend Equivalents earned on RSU grants			(59)			(59)
Ending Balance at Jun. 30, 2020	252	739,156	648,909	(827,381)	(13,154)	547,782
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)			(191,467)		4,385	(187,082)
Employee stock-based compensation		4,971				4,971
Common stock withheld related to net share settlement of equity awards		(15)				(15)
Dividend Equivalents earned on RSU grants			(10)			(10)
Ending Balance at Sep. 30, 2020	252	744,112	457,432	(827,381)	(8,769)	365,646
Beginning Balance at Dec. 31, 2020	253	767,484	378,906	(827,381)	(35,701)	283,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)			(6,042)		1,337	(4,705)
Employee stock-based compensation		3,885	18			3,903
Issuance of shares of common stock under long-term incentive plan	1					1
Common stock withheld related to net share settlement of equity awards		(1,317)				(1,317)
Ending Balance at Mar. 31, 2021	254	770,052	372,882	(827,381)	(34,364)	281,443
Beginning Balance at Dec. 31, 2020	253	767,484	378,906	(827,381)	(35,701)	283,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)						119,511
Ending Balance at Sep. 30, 2021	254	779,013	489,914	(827,381)	(27,157)	414,643
Beginning Balance at Mar. 31, 2021	254	770,052	372,882	(827,381)	(34,364)	281,443
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)			27,866		4,584	32,450
Employee stock-based compensation		4,613	23			4,636
Ending Balance at Jun. 30, 2021	254	774,665	400,771	(827,381)	(29,780)	318,529
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)			89,143		2,623	91,766
Employee stock-based compensation		4,343				4,343
Warrants exercised		5				5
Ending Balance at Sep. 30, 2021	$ 254	$ 779,013	$ 489,914	$ (827,381)	$ (27,157)	$ 414,643

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Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Condensed Consolidated Statements of Stockholders' Equity (Deficit)
Issuance of shares of common stock under long-term incentive plan (in shares) | shares	59,166
Dividends (in dollars per share) | $ / shares	$ 0.50

XML

Basis of Presentation

9 Months Ended

Sep. 30, 2021

Basis of Presentation

Basis of Presentation

1. Basis of Presentation

The accompanying unaudited condensed consolidated financial statements include the accounts of Arch Resources, Inc. (“Arch Resources”) and its subsidiaries (“Arch” or the “Company”). Unless the context indicates otherwise, the terms “Arch” and the “Company” are used interchangeably in this Quarterly Report on Form 10-Q. The Company’s primary business is the production of metallurgical and thermal coal from underground and surface mines located throughout the United States, for sale to steel producers, utility companies, and industrial accounts both in the United States and around the world. The Company currently operates mining complexes in West Virginia, Wyoming and Colorado. All subsidiaries are wholly owned. Intercompany transactions and accounts have been eliminated in consolidation.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial reporting and U.S. Securities and Exchange Commission regulations. In the opinion of management, all adjustments, consisting of normal, recurring accruals considered necessary for a fair presentation, have been included. Results of operations for the three and nine months ended September 30, 2021 are not necessarily indicative of results to be expected for the year ending December 31, 2021. These financial statements should be read in conjunction with the audited financial statements and related notes as of and for the year ended December 31, 2020 included in the Company’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission.

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Accounting Policies

9 Months Ended

Sep. 30, 2021

Accounting Policies

Accounting Policies

2. Accounting Policies

Recently Adopted Accounting Guidance

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting." The amendments provide optional guidance for a limited time to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference the London interbank offered rate (“LIBOR”) or another reference rate expected to be discontinued due to reference rate reform. These amendments are effective immediately and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. We are currently evaluating our contracts and the optional expedients provided by the new standard.

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes.” ASU 2019-12 eliminates certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The ASU is effective for public companies for fiscal years beginning after December 15, 2020, and interim periods therein with early adoption permitted. The Company adopted this ASU with minimal impact to the Company’s financial statements.

Recent Accounting Guidance Issued Not Yet Effective

In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40)—Accounting for Convertible Instruments and Contracts in an Entity's Own Equity.  ASU 2020-06 reduces the number of accounting models for convertible debt instruments and convertible preferred stock. For convertible instruments with conversion features that are not required to be accounted for as derivatives under Topic 815, Derivatives and Hedging, or that do not result in substantial premiums accounted for as paid-in capital, the embedded conversion features no longer are separated from

the host contract.  ASU 2020-06 also removes certain conditions that should be considered in the derivatives scope exception evaluation under Subtopic 815-40, Derivatives and Hedging—Contracts in Entity’s Own Equity, and clarify the scope and certain requirements under Subtopic 815-40.  In addition, ASU 2020-06 improves the guidance related to the disclosures and earnings-per-share (EPS) for convertible instruments and contract in entity’s own equity.  ASU 2020-06 is effective for public business entities that meet the definition of a Securities and Exchange Commission (SEC) filer, excluding entities eligible to be smaller reporting companies as defined by the SEC, for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The FASB specified that an entity should adopt the guidance as of the beginning of its annual fiscal year.  The Company is currently evaluating the impact this ASU will have on its consolidated financial statements.

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Joint Venture with Peabody Energy

9 Months Ended

Sep. 30, 2021

Joint Venture with Peabody Energy

Joint Venture with Peabody Energy

3. Joint Venture with Peabody Energy

The Company incurred expenses of $4.4 million and $15.9 million for the three and nine months ended September 30, 2020, respectively, associated with the regulatory approval process related to the proposed joint venture with Peabody that was terminated jointly by the parties due to the Federal Trade Commission blocking the joint venture during the third quarter of 2020. No amounts related to the joint venture were incurred for the three and nine months ended September 30, 2021.

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Gain on Property Insurance Recovery Related to Mountain Laurel Longwall

9 Months Ended

Sep. 30, 2021

Gain on Property Insurance Recovery Related to Mountain Laurel Longwall

Gain on Property Insurance Recovery Related to Mountain Laurel Longwall

4. Gain on Property Insurance Recovery Related to Mountain Laurel Longwall

The Company recorded a gain of $23.5 million related to a property insurance recovery at its Mountain Laurel operation during the nine months ended September 30, 2020. As a result of geologic conditions in the final longwall panel, Mountain Laurel was unable to recover 123 of the longwall system’s 176 hydraulic shields. No amounts related to the property insurance recovery were incurred for the three and nine months ended September 30, 2021.

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Asset Impairment and Restructuring

9 Months Ended

Sep. 30, 2021

Asset Impairment and Restructuring

Asset Impairment and Restructuring

5. Asset Impairment and Restructuring

During the third quarter of 2020, the Company determined that indicators of impairment existed with respect to certain of its thermal long-lived assets. As a result, the Company recorded impairment charges during both the three and nine months ended September 30, 2020 of $51.8 million related to the Coal Creek Mine, $33.5 million related to the Viper Mine, $41.6 million related to the West Elk Mine, and $36.2 million related to the Company’s equity method investment in Knight Hawk Holdings, LLC. No amounts related to asset impairment were incurred for the three and nine months ended September 30, 2021.

The Company recorded $13.3 million of employee severance expense related to a voluntary separation plan that was accepted by 53 members of the corporate staff and 201 employees from the Company’s thermal operations during the three and nine months ended September 30, 2020. No amounts related to the employee severance expense were incurred for the three and nine months ended September 30, 2021.

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2021

Accumulated Other Comprehensive Income (Loss).

Accumulated Other Comprehensive Income (Loss)

6. Accumulated Other Comprehensive Income (Loss)

The following items are included in accumulated other comprehensive income (loss) (“AOCI”), net of tax:

			Pension,
			Postretirement				Accumulated
			and Other Post-				Other
	Derivative		Employment		Available-for-		Comprehensive
	Instruments		Benefits		Sale Securities		Income (loss)
	(In thousands)
Balance at December 31, 2020	$	(3,891)	$	(31,459)	$	(351)	$	(35,701)
Unrealized losses		35		6,429		245		6,709
Amounts reclassified from accumulated other comprehensive income (loss)		1,591		269		(25)		1,835
Balances at September 30, 2021	$	(2,265)	$	(24,761)	$	(131)	$	(27,157)

The following amounts were reclassified out of AOCI:

	Three Months Ended September 30,				Nine Months Ended September 30,				Line Item in the Condensed Consolidated
Details About AOCI Components	2021		2020		2021		2020		Statements of Operations
	(In thousands)
Coal hedges	$	—	$	98	$	—	$	294	Revenues
Interest rate hedges		(336)		(638)		(1,591)		(1,502)	Interest expense
		—		—		—		—	Provision for (benefit from) income taxes
	$	(336)	$	(540)	$	(1,591)	$	(1,208)	Net of tax
Pension, postretirement and other post-employment benefits
Amortization of actuarial gains (losses), net 1	$	(590)	$	(138)	$	(1,772)	$	328	Non-service related pension and postretirement benefit (costs) credits
Amortization of prior service credits		52		30		139		84	Non-service related pension and postretirement benefit (costs) credits
Pension settlement		376		437		1,364		567	Non-service related pension and postretirement benefit (costs) credits
		—		—		—		—	Provision for (benefit from) income taxes
	$	(162)	$	329	$	(269)	$	979	Net of tax
Available-for-sale securities 2	$	(1)	$	128	$	25	$	140	Interest and investment income
		—		—		—		—	Provision for (benefit from) income taxes
	$	(1)	$	128	$	25	$	140	Net of tax

¹ Production-related benefits and workers’ compensation costs are included in costs to produce coal.

² The gains and losses on sales of available-for-sale-securities are determined on a specific identification basis.

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Inventories

9 Months Ended

Sep. 30, 2021

Inventories

Inventories

7. Inventories

Inventories consist of the following:

	September 30,		December 31,
	2021		2020
	(In thousands)
Coal	$	74,422	$	49,436
Repair parts and supplies		81,448		76,572
	$	155,870	$	126,008

The repair parts and supplies are stated net of an allowance for slow-moving and obsolete inventories of $0.8 million at September 30, 2021 and $0.6 million at December 31, 2020.

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Investments in Available-for-Sale Securities

9 Months Ended

Sep. 30, 2021

Investments in Available-for-Sale Securities

Investments in Available-for-Sale Securities

8. Investments in Available-for-Sale Securities

The Company has invested in marketable debt securities, primarily highly liquid U.S. Treasury securities and investment grade corporate bonds. These investments are held in the custody of a major financial institution. These securities are classified as available-for-sale securities and, accordingly, the unrealized gains and losses are recorded through other comprehensive income.

The Company’s investments in available-for-sale marketable securities are as follows:

	September 30, 2021
			Gross					Allowance
			Unrealized					for - Credit	Fair
	Cost Basis		Gains		Losses			Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	6,075	$	—	$	(33)	$	—	$	6,042
Corporate notes and bonds		14,140		—		(98)		—		14,042
Total Investments	$	20,215	$	—	$	(131)	$	—	$	20,084

	December 31, 2020
			Gross					Allowance
			Unrealized					for - Credit	Fair
	Cost Basis		Gains			Losses		Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	57,299	$	11	$	(86)	$	—	$	57,224
Corporate notes and bonds		39,817		1		(277)		—		39,541
Total Investments	$	97,116	$	12	$	(363)	$	—	$	96,765

The aggregate fair value of investments with unrealized losses that were owned for less than a year was $2.0 million and $45.3 million at September 30, 2021 and December 31, 2020, respectively. The aggregate fair value of investments with unrealized losses that were owned for over a year was $18.1 million and $8.1 million at September 30, 2021 and December 31, 2020, respectively. The unrealized losses in the Company’s portfolio at September 30, 2021 are the result of normal market fluctuations. The Company does not currently intend to sell these investments before recovery of their amortized cost base.

The debt securities outstanding at September 30, 2021 have maturity dates ranging from the fourth quarter of 2021 through the first quarter of 2022. The Company classifies its investments as current based on the nature of the investments and their availability to provide cash for use in current operations.

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Derivatives

9 Months Ended

Sep. 30, 2021

Derivatives

Derivatives

9. Derivatives

Interest rate risk management

The Company has entered into interest rate swaps to reduce the variability of cash outflows associated with interest payments on its variable rate term loan. These swaps have been designated as cash flow hedges. For additional information on these arrangements, see Note 11, “Debt and Financing Arrangements,” in the Condensed Consolidated Financial Statements.

Diesel fuel price risk management

The Company is exposed to price risk with respect to diesel fuel purchased for use in its operations. The Company anticipates purchasing approximately 35 to 40 million gallons of diesel fuel for use in its operations during 2021. To protect the Company’s cash flows from increases in the price of diesel fuel for its operations, the Company uses forward physical diesel purchase contracts and purchased heating oil call options. At September 30, 2021, the Company had no heating oil call options outstanding.

Coal price risk management positions

The Company may sell or purchase forward contracts, swaps and options in the over-the-counter coal market in order to manage its exposure to coal prices. The Company has exposure to the risk of fluctuating coal prices related to forecasted, index-priced sales or purchases of coal or to the risk of changes in the fair value of a fixed price physical sales contract. Certain derivative contracts may be designated as hedges of these risks.

At September 30, 2021, the Company held derivatives for risk management purposes that are expected to settle in the following years:

(Tons in thousands)	2021	2022	Total
Coal sales	338	33	371
Coal purchases	31	33	64

Coal trading positions

The Company may sell or purchase forward contracts, swaps and options in the over-the-counter coal market for trading purposes. The Company is exposed to the risk of changes in coal prices on the value of its coal trading portfolio. The unrecognized gains of $0.1 million in the trading portfolio are expected to be realized during the remainder of 2021.

Tabular derivatives disclosures

The Company has master netting agreements with all of its counterparties which allow for the settlement of contracts in an asset position with contracts in a liability position in the event of default or termination. Such netting arrangements reduce the Company’s credit exposure related to these counterparties. For classification purposes, the Company records the net fair value of all the positions with a given counterparty as a net asset or liability in the Condensed Consolidated Balance Sheets. The amounts shown in the table below represent the fair value position of individual contracts, and not the net position presented in the accompanying Condensed Consolidated Balance Sheets.

The fair value and location of derivatives reflected in the accompanying Condensed Consolidated Balance Sheets are as follows:

	September 30, 2021						December 31, 2020
Fair Value of Derivatives	Asset		Liability				Asset		Liability
(In thousands)	Derivative		Derivative				Derivative		Derivative
Derivatives Designated as Hedging Instruments
Coal	$	—	$	—			$	—	$	—
Derivatives Not Designated as Hedging Instruments
Heating oil -- diesel purchases		—		—				237		—
Coal -- held for trading purposes		7,768		(7,688)				1,914		(1,595)
Coal -- risk management		3,233		(31,874)				1,094		(804)
Total	$	11,001	$	(39,562)			$	3,245	$	(2,399)
Total derivatives	$	11,001	$	(39,562)			$	3,245	$	(2,399)
Effect of counterparty netting		(11,001)		11,001				(2,392)		2,392
Net derivatives as classified in the balance sheets	$	—	$	(28,561)	$	(28,561)	$	853	$	(7)	$	846

		September 30,		December 31,
		2021		2020
Net derivatives as reflected on the balance sheets (in thousands)
Heating Oil and coal	Other current assets	$	—	$	853
Coal	Accrued expenses and other current liabilities		(28,561)		(7)
		$	(28,561)	$	846

The Company had a current asset representing cash collateral posted to a margin account for derivative positions primarily related to coal derivatives of $25.1 million and $1.4 million at September 30, 2021 and December 31, 2020, respectively. These amounts are not included with the derivatives presented in the table above and are included in “other current assets” in the accompanying Condensed Consolidated Balance Sheets.

The effects of derivatives on measures of financial performance are as follows:

Derivatives Used in Cash Flow Hedging Relationships (in thousands)

Three Months Ended September 30,

		Gain (Loss) Recognized in Other Comprehensive Income				Gains (Losses) Reclassified from Other Comprehensive Income into Income
		2021		2020		2021		2020
Coal sales	(1)	$	—	$	(25)	$	—	$	(569)
Coal purchases	(2)		—		25		—		471
Totals		$	—	$	—	$	—	$	(98)

At September 30, 2021, the Company did not have any derivative contracts designated as hedging instruments.

Derivatives Not Designated as Hedging Instruments (in thousands)

Three Months Ended September 30,

		Gain (Loss) Recognized
			2021		2020
Coal  trading — realized and unrealized	(3)	$	—	$	1
Coal risk management — unrealized	(3)		(19,641)		(2,650)
Change in fair value of coal derivatives and coal trading activities, net total		$	(19,641)	$	(2,649)
Coal risk management— realized	(4)	$	(6,495)	$	2,593
Heating oil — diesel purchases	(4)	$	—	$	(184)

Location in statement of operations:

(1) — Revenues

(2) — Cost of sales

(3) — Change in fair value of coal derivatives and coal trading activities, net

(4) — Other operating (income) expense, net

Derivatives Used in Cash Flow Hedging Relationships (in thousands)

Nine Months Ended September 30,

		Gain (Loss) Recognized in Other Comprehensive Income				Gains (Losses) Reclassified from Other Comprehensive Income into Income
		2021		2020		2021		2020
Coal sales	(1)	$	—	$	574	$	—	$	(1,471)
Coal purchases	(2)		—		(570)		—		1,177
Totals		$	—	$	4	$	—	$	(294)

At September 30, 2021, the Company did not have any derivative contracts designated as hedging instruments.

Derivatives Not Designated as Hedging Instruments (in thousands)

Nine Months Ended September 30,

		Gain (Loss) Recognized
		2021		2020
Coal trading— realized and unrealized	(3)	$	—	$	222
Coal risk management— unrealized	(3)		(28,931)		(3,561)
Natural gas trading — realized and unrealized	(3)		—		76
Change in fair value of coal derivatives and coal trading activities, net total		$	(28,931)	$	(3,263)
Coal risk management — realized	(4)	$	(7,008)	$	6,950
Heating oil — diesel purchases	(4)	$	—	$	(889)

Location in statement of operations:

(1) — Revenues

(2) — Cost of sales

(3) — Change in fair value of coal derivatives and coal trading activities, net

(4) — Other operating (income) expense, net

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Accrued Expenses and Other Current Liabilities

9 Months Ended

Sep. 30, 2021

Accrued Expenses and Other Current Liabilities.

Accrued Expenses and Other Current Liabilities

10. Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consist of the following:

	September 30,		December 31,
	2021		2020
	(In thousands)
Payroll and employee benefits	$	59,655	$	39,443
Taxes other than income taxes		54,130		56,232
Interest		4,346		2,795
Workers’ compensation		13,860		15,259
Asset retirement obligations		27,032		27,032
Coal derivatives		28,561		7
Other		10,684		14,488
	$	198,268	$	155,256

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Debt and Financing Arrangements

9 Months Ended

Sep. 30, 2021

Debt and Financing Arrangements

Debt and Financing Arrangements

11. Debt and Financing Arrangements

	September 30,		December 31,
	2021		2020
	(In thousands)
Term loan due 2024 ($286.5 million face value)	$	285,943	$	288,033
Tax Exempt Bonds ($98.1 million face value)		98,075		53,090
Convertible Debt ($155.3 million face value)		119,979		115,367
Other		61,995		62,695
Debt issuance costs		(10,959)		(10,873)
		555,033		508,312
Less: current maturities of debt		138,587		31,097
Long-term debt	$	416,446	$	477,215

Term Loan Facility

In 2017, the Company entered into a senior secured term loan credit agreement in an aggregate principal amount of $300 million (the “Term Loan Debt Facility”) with Credit Suisse AG, Cayman Islands Branch, as administrative agent and collateral agent, and the other financial institutions from time to time party thereto (collectively, the “Lenders”). The Term Loan Debt Facility was issued at 99.50% of the face amount and will mature on March 7, 2024. The term loans provided under the Term Loan Debt Facility (the “Term Loans”) are subject to quarterly principal amortization payments in an amount equal to $750,000. The interest rate on the Term Loan Debt Facility is, at the option of Arch Resources, either (i) LIBOR plus an applicable margin of 2.75%, subject to a 1.00% LIBOR floor, or (ii) a base rate plus an applicable margin of 1.75%.

The Term Loan Debt Facility is guaranteed by all existing and future wholly owned domestic subsidiaries of the Company (collectively, the “Subsidiary Guarantors” and, together with Arch Resources, the “Loan Parties”), subject to customary exceptions, and is secured by first priority security interests on substantially all assets of the Loan Parties, including 100% of the voting equity interests of directly owned domestic subsidiaries and 65% of the voting equity interests of directly owned foreign subsidiaries, subject to customary exceptions.

Accounts Receivable Securitization Facility

On September 30, 2020, the Company amended and extended its existing trade accounts receivable securitization facility provided to Arch Receivable Company, LLC, a special-purpose entity that is a wholly owned subsidiary of Arch Resources (“Arch Receivable”) (the “Securitization Facility”), which supports the issuance of letters of credit and requests for cash advances. The amendment to the Securitization Facility reduced the size of the facility from $160 million to $110 million of borrowing capacity and extended the maturity date to September 29, 2023.

Under the Securitization Facility, Arch Receivable, Arch Resources and certain of Arch Resources’s subsidiaries party to the Securitization Facility have granted to the administrator of the Securitization Facility a first priority security interest in eligible trade accounts receivable generated by such parties from the sale of coal and all proceeds thereof. As of September 30, 2021, letters of credit totaling $61.2 million were outstanding under the facility with $30.5 million available for borrowings.

Inventory-Based Revolving Credit Facility

On September 30, 2020, Arch Resources amended the senior secured inventory-based revolving credit facility in an aggregate principal amount of $50 million (the “Inventory Facility”) with Regions Bank (“Regions”) as administrative agent and collateral agent, as lender and swingline lender (in such capacities, the “Lender”) and as letter of credit issuer. Availability under the Inventory Facility is subject to a borrowing base consisting of (i) 85% of the net orderly liquidation value of eligible coal inventory, plus (ii) the lesser of (x) 85% of the net orderly liquidation value of eligible parts and supplies inventory and (y) 35% of the amount determined pursuant to clause (i), plus (iii) 100% of Arch Resources’s Eligible Cash (defined in the Inventory Facility), subject to reduction for reserves imposed by Regions.

The amendment of the Inventory Facility extended the maturity of the facility to September 29, 2023; eliminated the provision that accelerated maturity upon Liquidity (as defined in the Inventory Facility) falling below a specified level; and reduced the minimum Liquidity requirement from $175 million to $100 million. Additionally, the amendment included provisions that reduce the advance rates for coal inventory and parts and supplies, depending on “Liquidity” as defined as of any date of determination, the sum of, without duplication, (a) unrestricted cash or Permitted Investments as of such date of the Parent and its Subsidiaries (other than the Securitization Subsidiaries and Bonding Subsidiaries) that are not Foreign Subsidiaries, (b) withdrawable funds from brokerage accounts of Borrowers as of such date, (c) Availability as of such date, and (d) any unused commitments that are available to be drawn as of such date by the Parent pursuant to the terms of any Permitted Receivables Financing.

The Inventory Facility contains certain customary affirmative and negative covenants; events of default, subject to customary thresholds and exceptions; and representations, including certain cash management and reporting requirements that are customary for asset-based credit facilities. The Inventory Facility also includes a requirement to maintain Liquidity equal to or exceeding $100 million at all times. As of September 30, 2021, letters of credit totaling $27.7 million were outstanding under the facility with $13.3 million available for borrowings.

Equipment Financing

On March 4, 2020, the Company entered into an equipment financing arrangement accounted for as debt. The Company received $53.6 million in exchange for conveying an interest in certain equipment in operation at its Leer Mine and entered into a master lease arrangement for that equipment. The financing arrangement contains customary terms and events of default and provides for 48 monthly payments with an average interest rate of 6.34% maturing on March 4, 2024. Upon maturity, all interests in the subject equipment will revert back to the Company.

On July 29, 2021, the Company entered into an additional equipment financing arrangement accounted for as debt. The Company received $23.5 million in exchange for conveying an interest in certain equipment in operation at its Powder River Basin operations and entered into a master lease arrangement for that equipment. The financing arrangement contains customary terms and events of default and provides for 42 monthly payments with an average implied interest rate of 7.35% maturing on February 1, 2025. Upon maturity, the Company will have the option to purchase the equipment.

Tax Exempt Bonds

On July 2, 2020, the West Virginia Economic Development Authority (the “Issuer”) issued $53.1 million aggregate principal amount of Solid Waste Disposal Facility Revenue Bonds (Arch Resources Project), Series 2020 (the “Tax Exempt Bonds”) pursuant to an Indenture of Trust dated as of June 1, 2020 (the “Indenture of Trust”) between the Issuer and Citibank, N.A., as trustee (the “Trustee”). On March 4, 2021, the Issuer issued an additional $45.0 million of Series 2021 Tax Exempt Bonds. The proceeds of the Tax Exempt Bonds were loaned to the Company pursuant to a Loan Agreement dated as of June 1, as supplemented by a First Amendment to Loan Agreement dated as of March 1, 2021

(collectively, the “Loan Agreement”), each between the Issuer and the Company. The Tax Exempt Bonds are payable solely from payments to be made by the Company under the Loan Agreement as evidenced by a Note from the Company to the Trustee. The proceeds of the Tax Exempt Bonds are being used to finance certain costs of the acquisition, construction, reconstruction, and equipping of solid waste disposal facilities at the Company’s Leer South development, and for capitalized interest and certain costs related to issuance of the Tax Exempt Bonds.

The Tax Exempt Bonds will bear interest payable each January 1 and July 1, commencing January 1, 2021 for the Series 2020 and July 1, 2021 for the Series 2021, and have a final maturity of July 1, 2045; however, the Tax Exempt Bonds are subject to mandatory tender on July 1, 2025 at a purchase price equal to 100% of the principal amount of the Tax Exempt Bonds, plus accrued interest to July 1, 2025. The Series 2020 and Series 2021 Tax Exempt Bonds bear interest of 5% and 4.125%, respectively.

The Tax Exempt Bonds are subject to redemption (i) in whole or in part at any time on or after January 1, 2025 at the option of the Issuer, upon the Company’s direction at a redemption price of par, plus interest accrued to the redemption date; and (ii) at par plus interest accrued to the redemption date from certain excess Tax Exempt Bonds proceeds as further described in the Indenture of Trust.

The Company’s obligations under the Loan Agreement are (i) except as otherwise described below, secured by first priority liens on and security interests in substantially all of the Company’s and Subsidiary Guarantors’ real property and other assets, subject to certain customary exceptions and permitted liens, and in any event excluding our accounts receivable and inventory; and (ii) jointly and severally guaranteed by the Subsidiary Guarantors, subject to customary exceptions.

The collateral securing the Company’s obligations under the Loan Agreement is substantially the same as the collateral securing the obligations under the Term Loan Debt Facility other than with respect to variances in certain real property collateral. The real property securing the Company’s obligations under the Loan Agreement includes a subset of the real property collateral securing the obligations under the Term Loan Debt Facility and includes only mortgages on substantially all of the Company’s revenue generating real property and assets.

The Loan Agreement contains certain affirmative covenants and representations, including but not limited to: (i) maintenance of a rating on the Tax Exempt Bonds; (ii) maintenance of proper books of records and accounts; (iii) agreement to add additional guarantors to guarantee the obligations under the Loan Agreement in certain circumstances; (iv) procurement of customary insurance; and (v) preservation of legal existence and certain rights, franchises, licenses and permits. The Loan Agreement also contains certain customary negative covenants, which, among other things, and subject to certain exceptions, include restrictions on (i) release of collateral securing the Company’s obligations under the Loan Agreement; (ii) mergers and consolidations and disposition of assets, and (iii) restrictions on actions that may jeopardize the tax-exempt status of the Tax Exempt Bonds.

The Loan Agreement contains customary events of default, subject to customary thresholds and exceptions, including, among other things: (i) nonpayment of principal, purchase price, interest and other fees (subject to certain cure periods); (ii) bankruptcy or insolvency proceedings relating to us; (iii) material inaccuracy of a representation or warranty at the time made; (iv) cross-events of default to indebtedness of at least $50 million; and (v) cross defaults to the Indenture of Trust, the guaranty related to the Tax Exempt Bonds or any related security documents.

As of September 30, 2021, the Company has utilized the total Tax Exempt Bond proceeds.

Convertible Debt

On November 3, 2020, the Company issued $155.3 million in aggregate principal amount of 5.25% convertible senior notes due 2025 (“Convertible Notes ” or “Convertible Debt”). The net proceeds from the issuance of the Convertible Notes, after deducting offering related costs of $5.1 million and cost of a “Capped Call Transaction” as defined below of $17.5 million, were approximately $132.7 million. The Convertible Notes bear interest at the annual rate of 5.25%, payable semiannually in arrears on May 15 and November 15 of each year, beginning on May 15, 2021, and will mature on November 15, 2025, unless earlier converted, redeemed or repurchased by the Company.

The Convertible Notes are convertible into cash, shares of the Company’s common stock or a combination thereof, at the Company’s election, at an initial conversion rate of 26.7917 shares of common stock per $1,000 principal amount of Convertible Notes, which is equivalent to an initial conversion price of approximately $37.325 per share, subject to adjustment pursuant to the terms of the indenture governing the Convertible Notes (the "Indenture"). Before July 15, 2025, noteholders will have the right to convert their Convertible Notes only upon the occurrence of certain events. From and after July 15, 2025, noteholders may convert their Convertible Notes at any time until the close of business on the second scheduled trading day immediately before the maturity date.

The conversion rate of the Convertible Notes may be adjusted in certain circumstances, including in connection with a conversion of the Convertible Notes made following certain fundamental changes and under other circumstances set forth in the Indenture. It is the Company’s current intent and policy to settle any conversions of notes through a combination of cash and shares.

The Convertible Notes will be redeemable, in whole and not part, at the Company’s option at any time on or after November 20, 2023 and on or before the 40th scheduled trading day immediately before the maturity date, at a cash redemption price equal to the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest, if any, to, but excluding, the redemption date, but only if the last reported sale price per share of the Company’s common stock exceeds 130% of the conversion price on: (i) each of at least 20 trading days, whether or not consecutive, during the 30 consecutive trading days ending on, and including, the trading day immediately before the date the Company sends the related redemption notice; and (ii) the trading day immediately before the date the Company sends such notice. In addition, calling the Convertible Notes for redemption will constitute a Make-Whole Fundamental Change, which will result in an increase to the conversion rate in certain circumstances for a specified period of time. No sinking fund is provided for the Convertible Notes.

During the third quarter of 2021, the common stock sale condition of the Convertible Notes was satisfied. As described in the Indenture, this condition is satisfied when the closing stock price exceeds 130% of the conversion price of $37.325 per share for at least 20 trading days of the last 30 trading days prior to quarter end. As a result, the Convertible Notes are currently convertible at the election of noteholders during the fourth quarter. Due to the Company’s stated intent to settle the principal value in cash, the liability portion of $120.0 million of the Convertible Notes was included in current maturities of debt on the Company’s Condensed Consolidated Balance Sheet at September 30, 2021.

As of September 30, 2021, all of the Convertible Notes remained outstanding. In addition, from October 1, 2021 to the date of this filing, the Company has not received any conversion requests for Convertible Notes and does not anticipate receiving any conversion requests in the near term as the market value of the Convertible Notes exceeds the conversion value of the Convertible Notes. As of September 30, 2021, the if-converted value of the Convertible Notes exceeded the principal amount by $230.5 million.

Total interest expense related to the Convertible Debt for the three months ended September 30, 2021 was $3.8 million and was comprised of $2.0 million related to the contractual interest coupon and $1.8 million related to the amortization of the discount on the liability component. Total interest expense related to the Convertible Debt for the nine months ended September 30, 2021 was $11.2 million and was comprised of $6.1 million related to the contractual interest coupon and $5.1 million related to the amortization of the discount on the liability component.

Capped Call Transactions

In connection with the offering of the Convertible Notes, the Company entered into privately negotiated convertible note hedge transactions (collectively, the “Capped Call Transactions”). The Capped Call Transactions cover, subject to customary anti-dilution adjustments, the number of shares of the Company’s common stock that initially underlie the Convertible Notes.

The Capped Call Transactions are expected generally to reduce the potential dilution and/or offset any cash payments the Company is required to make in excess of the principal amount due upon conversion of the Convertible

Notes in the event that the market price of the Company’s common stock is greater than the strike price of the Capped Call Transactions, which was initially $37.325 per share (subject to adjustment under the terms of the Capped Call Transactions). The strike price of $37.325 corresponds to the initial conversion price of the Convertible Notes. The number of shares underlying the Capped Call Transactions is 4.2 million.

The cap price of the Capped Call Transactions is $52.2550 per share, which represents a premium of 75% over the last reported sale price of the Company’s common stock on October 29, 2020. The cost of the Capped Call Transactions was approximately $17.5 million.

The Capped Call Transactions are separate transactions, in each case entered into between the Company and the respective Option Counterparty, and are not part of the terms of the Convertible Notes and will not affect any holder’s rights under the Convertible Notes. Holders of the Convertible Notes will not have any rights with respect to the Capped Call Transactions. Additionally, the cost of the Capped Call Transactions is not expected to be tax deductible as the Company did not elect to integrate the Capped Call Transactions into the notes for tax purposes.

Accounting Treatment of the Convertible Notes and Related Hedge Transactions

As the Capped Call Transactions meet certain accounting criteria, the Capped Call Transactions were classified as equity and are not accounted for as derivatives. The proceeds from the offering of the Convertible Notes were separated into liability and equity components. On the date of issuance, the liability and equity components of the Convertible Notes were calculated to be approximately $114.5 million and $40.8 million, respectively. The initial $114.5 million liability component was determined based on the fair value of similar debt instruments excluding the conversion feature assuming a hypothetical interest rate of 12.43%. The inputs and assumptions used in the calculated fair value of the liability component of the convertible debt fall within Level 2 of the fair value hierarchy. The initial $40.8 million equity component represents the difference between the fair value of the initial $114.5 million in debt and the $155.3 million of gross proceeds. The equity component is included in additional paid-in capital in the Condensed Consolidated Balance Sheets and will not be subsequently remeasured as long as it continues to meet the conditions for equity classification. The related initial debt discount of $40.8 million is being amortized over the life of the Convertible Notes as non-cash interest expense using the effective interest method.

In connection with the above-noted transactions, the Company incurred approximately $5.9 million of debt issuance costs. These offering expenses were allocated to the liability and equity components in proportion to the allocation of proceeds and accounted for as debt and equity issuance costs, respectively. The Company allocated $4.4 million of debt issuance costs to the liability component, which were capitalized as deferred financing costs within long-term debt. These costs are being amortized as interest expense over the term of the debt (which coincides with the five year life of the Convertible Notes) using the effective interest method. The remaining $1.5 million of transaction costs allocated to the equity component were recorded as a reduction of the equity component.

Interest Rate Swaps

The Company has entered into a series of interest rate swaps to fix a portion of the LIBOR interest payments due under the Term Loan Debt Facility. The interest rate swaps qualify for cash flow hedge accounting treatment and as such, the change in the fair value of the interest rate swaps is recorded on the Company’s Condensed Consolidated Balance Sheet as an asset or liability with the effective portion of the gains or losses reported as a component of accumulated other comprehensive income and the ineffective portion reported in earnings. As interest payments are made on the Term Loan, amounts in accumulated other comprehensive income will be reclassified into earnings through interest expense to reflect a net interest on the Term Loan equal to the effective yield of the fixed rate of the swap plus 2.75% which is the spread on the revised Term Loan. In the event that an interest rate swap is terminated prior to maturity, gains or losses in accumulated other comprehensive income will remain deferred and be reclassified into earnings in the periods which the hedged forecasted transaction affects earnings.

Below is a summary of the Company’s outstanding interest rate swap agreements designated as hedges as of September 30, 2021:

Notional Amount
(in millions)		Effective Date	Fixed Rate		Receive Rate	Expiration Date
$	100.0	June 30, 2021	2.315	%	1-month LIBOR	June 30, 2023

The fair value of the interest rate swaps at September 30, 2021 is a liability of $2.3 million, which is recorded within Other noncurrent liabilities, with the offset to accumulated other comprehensive income on the Company’s Condensed Consolidated Balance Sheet. The Company realized $0.3 million and $1.6 million of losses during the three and nine months ended September 30, 2021, respectively, related to settlements of the interest rate swaps, which were recorded to interest expense on the Company’s Condensed Consolidated Statement of Operations. The interest rate swaps are classified as Level 2 within the fair value hierarchy.

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Income Taxes

9 Months Ended

Sep. 30, 2021

Income Taxes

Income Taxes

12. Income Taxes

A reconciliation of the federal income tax provision at the statutory rate to the actual provision for (benefit from) income taxes follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Income tax provision (benefit) at statutory rate	$	18,493	$	(40,128)	$	23,576	$	(55,922)
Percentage depletion and other perm items		(3,357)		2,242		(6,313)		(3,358)
State taxes, net of effect of federal taxes		944		(2,695)		1,832		(4,197)
Change in valuation allowance		(15,984)		40,734		(18,814)		61,115
Current expense associated with uncertain tax positions		(1,128)		226		1,081		3,327
AMT sequestration refund		—		—		—		(1,171)
Other, net		(50)		—		(61)		—
Provision for (benefit from) income taxes	$	(1,082)	$	379	$	1,301	$	(206)

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Fair Value Measurements

9 Months Ended

Sep. 30, 2021

Fair Value Measurements

Fair Value Measurements

13. Fair Value Measurements

The hierarchy of fair value measurements assigns a level to fair value measurements based on the inputs used in the respective valuation techniques. The levels of the hierarchy, as defined below, give the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs.

● Level 1 is defined as observable inputs such as quoted prices in active markets for identical assets. Level 1 assets include U.S. Treasury securities, U.S. government agency securities, and coal swaps and futures that are submitted for clearing on the New York Mercantile Exchange.

● Level 2 is defined as observable inputs other than Level 1 prices. These include quoted prices for similar assets or liabilities in an active market, quoted prices for identical assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. The Company’s Level 2 assets and liabilities include Corporate debt securities, coal commodity contracts, and interest rate swaps with fair values derived from quoted prices in over-the-counter markets or from prices received from direct broker quotes.

● Level 3 is defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. These include the Company’s commodity option contracts (coal, natural gas and heating oil) valued using modeling techniques, such as Black-Scholes, that require the use of inputs, particularly volatility, that are rarely observable.

The table below sets forth, by level, the Company’s financial assets and liabilities that are recorded at fair value in the accompanying Condensed Consolidated Balance Sheet:

	September 30, 2021
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Investments in marketable securities	$	20,084	$	6,042	$	14,042	$	—
Derivatives		—		—		—		—
Total assets	$	20,084	$	6,042	$	14,042	$	—
Liabilities:
Derivatives	$	30,826	$	6,336	$	24,490	$	—

The Company’s contracts with its counterparties allow for the settlement of contracts in an asset position with contracts in a liability position in the event of default or termination. For classification purposes, the Company records the net fair value of all the positions with these counterparties as a net asset or liability. Each level in the table above displays the underlying contracts according to their classification in the accompanying Condensed Consolidated Balance Sheet, based on this counterparty netting.

There were no financial instruments categorized as Level 3 instruments at September 30, 2021.

Fair Value of Long-Term Debt

At September 30, 2021 and December 31, 2020, the fair value of the Company’s debt, including amounts classified as current, was $815.2 million and $533.8 million, respectively. Fair values are based upon observed prices in an active market, when available, or from valuation models using market information, which fall into Level 2 in the fair value hierarchy.

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Earnings (Loss) per Common Share

9 Months Ended

Sep. 30, 2021

Earnings (Loss) per Common Share

Earnings (Loss) per Common Share

14. Earnings (Loss) per Common Share

The Company computes basic net income (loss) per share using the weighted average number of common shares outstanding during the period. Diluted net income (loss) per share is computed using the weighted average number of common shares and the effect of potentially dilutive securities outstanding during the period. Potentially dilutive securities may consist of warrants, restricted stock units or other contingently issuable shares. The dilutive effect of outstanding warrants, restricted stock units, convertible debt, and other contingently issuable shares is reflected in diluted earnings per share by application of the treasury stock method. The weighted average share impact of warrants and restricted stock units that were excluded from the calculation of diluted shares due to the Company incurring a net loss for the three and nine months ending September 30, 2020 were 178,333 and 169,555 shares, respectively.

The following table provides the basic and diluted earnings per share by reconciling the denominators of the computations:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2021	2020	2021	2020
(In Thousands)
Weighted average shares outstanding:
Basic weighted average shares outstanding	15,302	15,147	15,293	15,144
Effect of dilutive securities	2,803	—	1,808	—
Diluted weighted average shares outstanding	18,105	15,147	17,101	15,144

The Company expects to settle the principal amount of Convertible Notes in cash, but settle the conversion premium in shares. As a result, only the amount by which the conversion value exceeds the aggregate principal amount of the Convertible Debt (the “conversion premium”) is considered in the diluted earnings per share calculation. The conversion premium has a potentially dilutive effect on diluted net income per share when the average market price of the

Company’s common stock for a given period exceeds the initial conversion price of $37.325 per share for the Convertible Notes. The Company calculates the number of shares needed to satisfy the conversion premium by using an average monthly stock price for each month; and the resulting dilutive impact for the three months ended is 1,915,000 shares and 1,338,444 shares nine months ended September 30, 2021.

The Capped Call Transaction is anti-dilutive and is excluded from the calculation of diluted earnings per share.

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Workers Compensation Expense

9 Months Ended

Sep. 30, 2021

Workers Compensation Expense

Workers Compensation Expense

15. Workers Compensation Expense

The Company is liable under the Federal Mine Safety and Health Act of 1969, as subsequently amended, to provide for pneumoconiosis (occupational disease) benefits to eligible employees, former employees and dependents. The Company currently provides for federal claims principally through a self-insurance program. The Company is also liable under various state workers’ compensation statutes for occupational disease benefits. The occupational disease benefit obligation represents the present value of the actuarially computed present and future liabilities for such benefits over the employees’ applicable years of service.

In October 2019, the Company filed an application with the Office of Workers’ Compensation Programs (“OWCP”) within the Department of Labor for reauthorization to self-insure federal black lung benefits. In February 2020, the Company received a reply from the OWCP confirming Arch’s status to remain self-insured contingent upon posting additional collateral of $71.1 million within 30 days of receipt of the letter. The Company is currently appealing the ruling from the OWCP and has received an extension to self-insure during the appeal process. The Company is evaluating alternatives to self-insurance, including the purchase of commercial insurance to cover these claims.

In addition, the Company is liable for workers’ compensation benefits for traumatic injuries which are calculated using actuarially-based loss rates, loss development factors and discounted based on a risk free rate. Traumatic workers’ compensation claims are insured with varying retentions/deductibles, or through state-sponsored workers’ compensation programs.

Workers’ compensation expense consists of the following components:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Self-insured occupational disease benefits:
Service cost	$	1,949	$	1,892	$	5,847	$	5,674
Interest cost(1)		1,110		1,398		3,330		4,196
Net amortization(1)		590		297		1,772		892
Total occupational disease	$	3,649	$	3,587	$	10,949	$	10,762
Traumatic injury claims and assessments		1,779		2,030		5,449		6,312
Total workers’ compensation expense	$	5,428	$	5,617	$	16,398	$	17,074

(1) In accordance with the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” these costs are recorded within Nonoperating expenses in the Condensed Consolidated Statement of Operations on the line item “Non-service related pension and postretirement benefit costs.”

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Employee Benefit Plans

9 Months Ended

Sep. 30, 2021

Employee Benefit Plans

Employee Benefit Plans

16. Employee Benefit Plans

The following table details the components of pension benefit costs (credits):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Interest cost(1)	$	1,099	$	1,255	$	3,234	$	4,342
Expected return on plan assets(1)		(1,812)		(2,022)		(5,460)		(6,333)
Pension settlement(1)		(376)		(437)		(1,364)		(567)
Amortization of prior service costs (credits) (1)		(52)		(27)		(139)		(83)
Net benefit credit	$	(1,141)	$	(1,231)	$	(3,729)	$	(2,641)

The following table details the components of other postretirement benefit costs:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Service cost	$	86	$	104	$	256	$	316
Interest cost(1)		529		543		1,585		1,849
Amortization of other actuarial losses (gains)(1)		—		(160)		—		(1,219)
Net benefit cost	$	615	$	487	$	1,841	$	946

(1) In accordance with the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” these costs are recorded within Nonoperating expenses in the Condensed Consolidated Statement of Operations on the line item “Non-service related pension and postretirement benefit costs.”

(1)

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies

Commitments and Contingencies

17. Commitments and Contingencies

The Company accrues for costs related to contingencies when a loss is probable and the amount is reasonably determinable. Disclosure of contingencies is included in the financial statements when it is at least reasonably possible that a material loss or an additional material loss in excess of amounts already accrued may be incurred.

The Company is a party to numerous claims and lawsuits with respect to various matters. The ultimate resolution of any such legal matter could result in outcomes that may be materially different from amounts the Company has accrued for such matters. The Company believes it has recorded adequate reserves for these matters.

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Segment Information

9 Months Ended

Sep. 30, 2021

Segment Information

Segment Information

18. Segment Information

On December 31, 2020, the Company sold its Viper operation. As a result, the Company revised its reportable segments beginning in the first quarter of 2021 to reflect the manner in which the chief operating decision maker (CODM) views the Company’s businesses going forward for purposes of reviewing performance, allocating resources and assessing future prospects and strategic execution. Prior to the first quarter of 2021, the Company had three reportable segments: MET, Powder River Basin (PRB), and Other Thermal. After the divestment of Viper, the Company has three remaining active thermal mines: West Elk, Black Thunder, and Coal Creek. With two distinct lines of business, metallurgical and thermal, the movement to two segments aligns with how the Company makes decisions and allocates resources. No changes were made to the MET Segment and the three remaining thermal mines are now reported as the “Thermal Segment”. The prior periods have been restated to reflect the change in reportable segments.

The Company’s reportable business segments are based on two distinct lines of business, metallurgical and thermal, and may include a number of mine complexes. The Company manages its coal sales by market, not by individual mining complex. Geology, coal transportation routes to customers, and regulatory environments also have a significant impact on the Company’s marketing and operations management. Mining operations are evaluated based on Adjusted EBITDA,

per-ton cash operating costs (defined as including all mining costs except depreciation, depletion, amortization, accretion on asset retirement obligations, and pass-through transportation expenses, divided by segment tons sold), and on other non-financial measures, such as safety and environmental performance. Adjusted EBITDA is not a measure of financial performance in accordance with generally accepted accounting principles, and items excluded from Adjusted EBITDA are significant in understanding and assessing the Company’s financial condition. Therefore, Adjusted EBITDA should not be considered in isolation, nor as an alternative to net income (loss), income (loss) from operations, cash flows from operations or as a measure of our profitability, liquidity or performance under generally accepted accounting principles. The Company uses Adjusted EBITDA to measure the operating performance of its segments and allocate resources to the segments. Furthermore, analogous measures are used by industry analysts and investors to evaluate the Company’s operating performance. Investors should be aware that the Company’s presentation of Adjusted EBITDA may not be comparable to similarly titled measures used by other companies. The Company reports its results of operations primarily through the following reportable segments: Metallurgical (MET) segment, containing the Company’s metallurgical operations in West Virginia, and the Thermal segment containing the Company’s thermal operations in Wyoming and Colorado.

Reporting segment results for the three and nine months ended September 30, 2021 and 2020 are presented below. The Corporate, Other, and Eliminations grouping includes these charges: idle operations; change in fair value of coal

derivatives and coal trading activities, net; corporate overhead; land management activities; other support functions; and the elimination of intercompany transactions.

					Corporate,
					Other and
(In thousands)	MET		Thermal		Eliminations		Consolidated
Three Months Ended September 30, 2021
Revenues	$	295,291	$	299,096	$	25	$	594,412
Adjusted EBITDA		118,548		52,737		(39,690)		131,595
Depreciation, depletion and amortization		25,041		5,488		231		30,760
Accretion on asset retirement obligation		508		4,419		510		5,437
Total assets		965,252		193,060		772,637		1,930,949
Capital expenditures		61,504		507		2,078		64,089
Three Months Ended September 30, 2020
Revenues	$	168,054	$	213,299	$	908	$	382,261
Adjusted EBITDA		12,407		31,616		(26,597)		17,426
Depreciation, depletion and amortization		24,221		8,150		259		32,630
Accretion on asset retirement obligation		486		3,842		619		4,947
Total assets		759,202		216,708		677,427		1,653,337
Capital expenditures		57,424		568		(892)		57,100
Nine Months Ended September 30, 2021
Revenues	$	693,522	$	707,394	$	1,429	$	1,402,345
Adjusted EBITDA		221,391		107,589		(99,962)		229,018
Depreciation, depletion and amortization		68,577		15,170		694		84,441
Accretion on asset retirement obligation		1,523		13,256		1,532		16,311
Total assets		965,252		193,060		772,637		1,930,949
Capital expenditures		204,347		1,370		6,329		212,046
Nine Months Ended September 30, 2020
Revenues	$	489,660	$	597,887	$	19,467	$	1,107,014
Adjusted EBITDA		76,037		19,600		(76,028)		19,609
Depreciation, depletion and amortization		69,028		23,310		1,767		94,105
Accretion on asset retirement obligation		1,458		11,526		1,955		14,939
Total assets		759,202		216,708		677,427		1,653,337
Capital expenditures		193,586		9,381		2,694		205,661

A reconciliation of net income (loss) to adjusted EBITDA and segment Adjusted EBITDA from coal operations follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2021		2020		2021		2020
Net income (loss)	$	89,143	$	(191,467)	$	110,967	$	(266,090)
Provision for (benefit from) income taxes		(1,082)		379		1,301		(206)
Interest expense, net		6,151		2,530		12,746		6,389
Depreciation, depletion and amortization		30,760		32,630		84,441		94,105
Accretion on asset retirement obligations		5,437		4,947		16,311		14,939
Costs related to proposed joint venture with Peabody Energy		—		4,423		—		15,938
Asset impairment and restructuring		—		163,106		—		176,371
Gain on property insurance recovery related to Mountain Laurel longwall		—		—		—		(23,518)
Gain on divestitures		—		—		—		(1,369)
Non-service related pension and postretirement benefit costs		1,186		878		3,252		3,076
Reorganization items, net		—		—		—		(26)
Adjusted EBITDA	$	131,595	$	17,426	$	229,018	$	19,609
EBITDA from idled or otherwise disposed operations		3,074		2,896		10,637		10,691
Selling, general and administrative expenses		21,081		21,541		66,679		64,024
Other		15,535		2,160		22,646		1,313
Segment Adjusted EBITDA from coal operations	$	171,285	$	44,023	$	328,980	$	95,637

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Revenue Recognition

9 Months Ended

Sep. 30, 2021

Revenue Recognition

Revenue Recognition

19. Revenue Recognition

ASC 606-10-50-5 requires that entities disclose disaggregated revenue information in categories (such as type of good or service, geography, market, type of contract, etc.) that depict how the nature, amount, timing, and uncertainty of revenue and cash flow are affected by economic factors. ASC 606-10-55-89 explains that the extent to which an entity’s revenue is disaggregated depends on the facts and circumstances that pertain to the entity’s contracts with customers and that some entities may need to use more than one type of category to meet the objective for disaggregating revenue.

In general, the Company’s business segmentation is aligned according to the nature and economic characteristics of its coal and customer relationships and provides meaningful disaggregation of each segment’s results. The Company has further disaggregated revenue between North America and Seaborne revenues which depicts the pricing and contract differences between the two. North America revenue is characterized by contracts that typically have a term of one year or longer and typically the pricing is fixed; whereas Seaborne revenue generally is derived by spot or short term contracts with pricing determined at the time of shipment or based on a market index.

					Corporate,
					Other and
	MET		Thermal		Eliminations		Consolidated
	(in thousands)
Three Months Ended September 30, 2021
North America revenues	$	52,654	$	247,955	$	25	$	300,634
Seaborne revenues		242,637		51,141		—		293,778
Total revenues	$	295,291	$	299,096	$	25	$	594,412
Three Months Ended September 30, 2020
North America revenues	$	47,197	$	208,273	$	908	$	256,378
Seaborne revenues		120,857		5,026		—		125,883
Total revenues	$	168,054	$	213,299	$	908	$	382,261
Nine Months Ended September 30, 2021
North America revenues	$	124,782	$	612,406	$	1,429	$	738,617
Seaborne revenues		568,740		94,988		—		663,728
Total revenues	$	693,522	$	707,394	$	1,429	$	1,402,345
Nine Months Ended September 30, 2020
North America revenues	$	117,058	$	579,380	$	19,467	$	715,905
Seaborne revenues		372,602		18,507		—		391,109
Total revenues	$	489,660	$	597,887	$	19,467	$	1,107,014

As of September 30, 2021, the Company has outstanding performance obligations for the remainder of 2021 of 20 million tons of fixed price contracts and 2.2 million tons of variable price contracts. Additionally, the Company has outstanding performance obligations beyond 2021 of approximately 91.2 million tons of fixed price contracts and 4.2 million tons of variable price contracts.

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Leases

9 Months Ended

Sep. 30, 2021

Leases

Leases

20. Leases

The Company has operating and financing leases for mining equipment, office equipment, office space and transloading terminals with remaining lease terms ranging from less than one year to approximately six years. Some of these leases include both lease and non-lease components which are accounted for as a single lease component as the Company has elected the practical expedient to combine these components for all leases. As most of the leases do not provide an implicit rate, the Company calculated the “right-of-use” (“ROU”) assets and lease liabilities using its secured incremental borrowing rate at the lease commencement date.

As of September 30, 2021 and December 31, 2020, the Company had the following ROU assets and lease liabilities within the Company’s Condensed Consolidated Balance Sheets:

		September 30,		December 31,
		2021		2020
Assets	Balance Sheet Classification
Operating lease right-of-use assets	Other noncurrent assets	$	15,127	$	17,069
Financing lease right-of-use assets	Other noncurrent assets		4,539		5,512
Total Lease Assets		$	19,666	$	22,581
Liabilities	Balance Sheet Classification
Financing lease liabilities - current	Accrued expenses and other current liabilities	$	902	$	860
Operating lease liabilities - current	Accrued expenses and other current liabilities		2,515		2,454
Financing lease liabilities - long-term	Other noncurrent liabilities		4,332		5,014
Operating lease liabilities - long-term	Other noncurrent liabilities		13,272		15,278
		$	21,021	$	23,606
Weighted average remaining lease term in years
Operating leases			5.25
Finance leases			3.50
Weighted average discount rate
Operating leases			5.5%
Finance leases			6.4%

Information related to leases was as follows:

		Three Months Ended September 30,					Nine Months Ended September 30,
		2021		2020			2021		2020
	(In thousands)					(In thousands)
Operating lease information:
Operating lease cost		$	841	$	846		$	2,533	$	2,774
Operating cash flows from operating leases			865		860			2,551		2,787
Financing lease information:
Financing lease cost		$	393	$	393		$	1,179	$	1,179
Operating cash flows from financing leases			303		303			909		909

Future minimum lease payments under non-cancellable leases as of September 30, 2021 were as follows:

	Operating		Finance
Year	Leases		Leases
	(In thousands)
2021	$	816	$	303
2022		3,317		1,210
2023		3,285		1,210
2024		3,200		1,210
2025		3,185		2,111
Thereafter		4,613		—
Total minimum lease payments	$	18,416	$	6,044
Less imputed interest		(2,629)		(810)
Total lease liabilities	$	15,787	$	5,234

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Subsequent Events

9 Months Ended

Sep. 30, 2021

Subsequent Event.

Subsequent Event

21. Subsequent Event

On October 26, 2021, the Company announced the initiation of a $0.25 per share quarterly dividend. The first dividend payment of approximately $3.8 million will be made to shareholders of record as of November 30, 2021, payable on December 15, 2021.

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Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2021

Accounting Policies

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial reporting and U.S. Securities and Exchange Commission regulations. In the opinion of management, all adjustments, consisting of normal, recurring accruals considered necessary for a fair presentation, have been included. Results of operations for the three and nine months ended September 30, 2021 are not necessarily indicative of results to be expected for the year ending December 31, 2021. These financial statements should be read in conjunction with the audited financial statements and related notes as of and for the year ended December 31, 2020 included in the Company’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission.

Recently Adopted Accounting Guidance and Recent Accounting Guidance Issued Not Yet Effective

Recently Adopted Accounting Guidance

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting." The amendments provide optional guidance for a limited time to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference the London interbank offered rate (“LIBOR”) or another reference rate expected to be discontinued due to reference rate reform. These amendments are effective immediately and may be applied prospectively to contract modifications made and hedging relationships entered into or evaluated on or before December 31, 2022. We are currently evaluating our contracts and the optional expedients provided by the new standard.

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes.” ASU 2019-12 eliminates certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The ASU is effective for public companies for fiscal years beginning after December 15, 2020, and interim periods therein with early adoption permitted. The Company adopted this ASU with minimal impact to the Company’s financial statements.

Recent Accounting Guidance Issued Not Yet Effective

In August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40)—Accounting for Convertible Instruments and Contracts in an Entity's Own Equity.  ASU 2020-06 reduces the number of accounting models for convertible debt instruments and convertible preferred stock. For convertible instruments with conversion features that are not required to be accounted for as derivatives under Topic 815, Derivatives and Hedging, or that do not result in substantial premiums accounted for as paid-in capital, the embedded conversion features no longer are separated from

the host contract.  ASU 2020-06 also removes certain conditions that should be considered in the derivatives scope exception evaluation under Subtopic 815-40, Derivatives and Hedging—Contracts in Entity’s Own Equity, and clarify the scope and certain requirements under Subtopic 815-40.  In addition, ASU 2020-06 improves the guidance related to the disclosures and earnings-per-share (EPS) for convertible instruments and contract in entity’s own equity.  ASU 2020-06 is effective for public business entities that meet the definition of a Securities and Exchange Commission (SEC) filer, excluding entities eligible to be smaller reporting companies as defined by the SEC, for fiscal years beginning after December 15, 2021, including interim periods within those fiscal years. Early adoption is permitted, but no earlier than fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The FASB specified that an entity should adopt the guidance as of the beginning of its annual fiscal year.  The Company is currently evaluating the impact this ASU will have on its consolidated financial statements.

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2021

Accumulated Other Comprehensive Income (Loss).

Schedule of Accumulated Other Comprehensive Income (Loss)

			Pension,
			Postretirement				Accumulated
			and Other Post-				Other
	Derivative		Employment		Available-for-		Comprehensive
	Instruments		Benefits		Sale Securities		Income (loss)
	(In thousands)
Balance at December 31, 2020	$	(3,891)	$	(31,459)	$	(351)	$	(35,701)
Unrealized losses		35		6,429		245		6,709
Amounts reclassified from accumulated other comprehensive income (loss)		1,591		269		(25)		1,835
Balances at September 30, 2021	$	(2,265)	$	(24,761)	$	(131)	$	(27,157)

Schedule of Comprehensive Income Reclassifications

	Three Months Ended September 30,				Nine Months Ended September 30,				Line Item in the Condensed Consolidated
Details About AOCI Components	2021		2020		2021		2020		Statements of Operations
	(In thousands)
Coal hedges	$	—	$	98	$	—	$	294	Revenues
Interest rate hedges		(336)		(638)		(1,591)		(1,502)	Interest expense
		—		—		—		—	Provision for (benefit from) income taxes
	$	(336)	$	(540)	$	(1,591)	$	(1,208)	Net of tax
Pension, postretirement and other post-employment benefits
Amortization of actuarial gains (losses), net 1	$	(590)	$	(138)	$	(1,772)	$	328	Non-service related pension and postretirement benefit (costs) credits
Amortization of prior service credits		52		30		139		84	Non-service related pension and postretirement benefit (costs) credits
Pension settlement		376		437		1,364		567	Non-service related pension and postretirement benefit (costs) credits
		—		—		—		—	Provision for (benefit from) income taxes
	$	(162)	$	329	$	(269)	$	979	Net of tax
Available-for-sale securities 2	$	(1)	$	128	$	25	$	140	Interest and investment income
		—		—		—		—	Provision for (benefit from) income taxes
	$	(1)	$	128	$	25	$	140	Net of tax

¹ Production-related benefits and workers’ compensation costs are included in costs to produce coal.

² The gains and losses on sales of available-for-sale-securities are determined on a specific identification basis.

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Inventories (Tables)

9 Months Ended

Sep. 30, 2021

Inventories

Inventories

	September 30,		December 31,
	2021		2020
	(In thousands)
Coal	$	74,422	$	49,436
Repair parts and supplies		81,448		76,572
	$	155,870	$	126,008

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Investments in Available-for-Sale Securities (Tables)

9 Months Ended

Sep. 30, 2021

Investments in Available-for-Sale Securities

Available-for-sale Securities

	September 30, 2021
			Gross					Allowance
			Unrealized					for - Credit	Fair
	Cost Basis		Gains		Losses			Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	6,075	$	—	$	(33)	$	—	$	6,042
Corporate notes and bonds		14,140		—		(98)		—		14,042
Total Investments	$	20,215	$	—	$	(131)	$	—	$	20,084

	December 31, 2020
			Gross					Allowance
			Unrealized					for - Credit	Fair
	Cost Basis		Gains			Losses		Losses	Value
	(In thousands)
Available-for-sale:
U.S. government and agency securities	$	57,299	$	11	$	(86)	$	—	$	57,224
Corporate notes and bonds		39,817		1		(277)		—		39,541
Total Investments	$	97,116	$	12	$	(363)	$	—	$	96,765

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Derivatives (Tables)

9 Months Ended

Sep. 30, 2021

Derivatives

Schedule of Price Risk Derivatives

(Tons in thousands)	2021	2022	Total
Coal sales	338	33	371
Coal purchases	31	33	64

Disclosure of Fair Value of Derivatives

	September 30, 2021						December 31, 2020
Fair Value of Derivatives	Asset		Liability				Asset		Liability
(In thousands)	Derivative		Derivative				Derivative		Derivative
Derivatives Designated as Hedging Instruments
Coal	$	—	$	—			$	—	$	—
Derivatives Not Designated as Hedging Instruments
Heating oil -- diesel purchases		—		—				237		—
Coal -- held for trading purposes		7,768		(7,688)				1,914		(1,595)
Coal -- risk management		3,233		(31,874)				1,094		(804)
Total	$	11,001	$	(39,562)			$	3,245	$	(2,399)
Total derivatives	$	11,001	$	(39,562)			$	3,245	$	(2,399)
Effect of counterparty netting		(11,001)		11,001				(2,392)		2,392
Net derivatives as classified in the balance sheets	$	—	$	(28,561)	$	(28,561)	$	853	$	(7)	$	846

		September 30,		December 31,
		2021		2020
Net derivatives as reflected on the balance sheets (in thousands)
Heating Oil and coal	Other current assets	$	—	$	853
Coal	Accrued expenses and other current liabilities		(28,561)		(7)
		$	(28,561)	$	846

Effects of Derivatives on Measures of Financial Performance

		Gain (Loss) Recognized in Other Comprehensive Income				Gains (Losses) Reclassified from Other Comprehensive Income into Income
		2021		2020		2021		2020
Coal sales	(1)	$	—	$	(25)	$	—	$	(569)
Coal purchases	(2)		—		25		—		471
Totals		$	—	$	—	$	—	$	(98)

		Gain (Loss) Recognized
			2021		2020
Coal  trading — realized and unrealized	(3)	$	—	$	1
Coal risk management — unrealized	(3)		(19,641)		(2,650)
Change in fair value of coal derivatives and coal trading activities, net total		$	(19,641)	$	(2,649)
Coal risk management— realized	(4)	$	(6,495)	$	2,593
Heating oil — diesel purchases	(4)	$	—	$	(184)

Location in statement of operations:

(1) — Revenues

(2) — Cost of sales

(3) — Change in fair value of coal derivatives and coal trading activities, net

(4) — Other operating (income) expense, net

		Gain (Loss) Recognized in Other Comprehensive Income				Gains (Losses) Reclassified from Other Comprehensive Income into Income
		2021		2020		2021		2020
Coal sales	(1)	$	—	$	574	$	—	$	(1,471)
Coal purchases	(2)		—		(570)		—		1,177
Totals		$	—	$	4	$	—	$	(294)

		Gain (Loss) Recognized
		2021		2020
Coal trading— realized and unrealized	(3)	$	—	$	222
Coal risk management— unrealized	(3)		(28,931)		(3,561)
Natural gas trading — realized and unrealized	(3)		—		76
Change in fair value of coal derivatives and coal trading activities, net total		$	(28,931)	$	(3,263)
Coal risk management — realized	(4)	$	(7,008)	$	6,950
Heating oil — diesel purchases	(4)	$	—	$	(889)

Location in statement of operations:

(1) — Revenues

(2) — Cost of sales

(3) — Change in fair value of coal derivatives and coal trading activities, net

(4) — Other operating (income) expense, net

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Accrued Expenses and Other Current Liabilities (Tables)

9 Months Ended

Sep. 30, 2021

Accrued Expenses and Other Current Liabilities.

Schedule of Accrued Expenses and Other Current Liabilities

	September 30,		December 31,
	2021		2020
	(In thousands)
Payroll and employee benefits	$	59,655	$	39,443
Taxes other than income taxes		54,130		56,232
Interest		4,346		2,795
Workers’ compensation		13,860		15,259
Asset retirement obligations		27,032		27,032
Coal derivatives		28,561		7
Other		10,684		14,488
	$	198,268	$	155,256

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Debt and Financing Arrangements (Tables)

9 Months Ended

Sep. 30, 2021

Debt and Financing Arrangements

Schedule of Long-term debt

	September 30,		December 31,
	2021		2020
	(In thousands)
Term loan due 2024 ($286.5 million face value)	$	285,943	$	288,033
Tax Exempt Bonds ($98.1 million face value)		98,075		53,090
Convertible Debt ($155.3 million face value)		119,979		115,367
Other		61,995		62,695
Debt issuance costs		(10,959)		(10,873)
		555,033		508,312
Less: current maturities of debt		138,587		31,097
Long-term debt	$	416,446	$	477,215

Schedule of Interest Rate Derivatives

Below is a summary of the Company’s outstanding interest rate swap agreements designated as hedges as of September 30, 2021:

Notional Amount
(in millions)		Effective Date	Fixed Rate		Receive Rate	Expiration Date
$	100.0	June 30, 2021	2.315	%	1-month LIBOR	June 30, 2023

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2021

Income Taxes

Schedule of Effective Income Tax Rate Reconciliation

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Income tax provision (benefit) at statutory rate	$	18,493	$	(40,128)	$	23,576	$	(55,922)
Percentage depletion and other perm items		(3,357)		2,242		(6,313)		(3,358)
State taxes, net of effect of federal taxes		944		(2,695)		1,832		(4,197)
Change in valuation allowance		(15,984)		40,734		(18,814)		61,115
Current expense associated with uncertain tax positions		(1,128)		226		1,081		3,327
AMT sequestration refund		—		—		—		(1,171)
Other, net		(50)		—		(61)		—
Provision for (benefit from) income taxes	$	(1,082)	$	379	$	1,301	$	(206)

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Measurements

Summary of Financial Assets and Liabilities Accounted for at Fair Value

	September 30, 2021
	Total		Level 1		Level 2		Level 3
	(In thousands)
Assets:
Investments in marketable securities	$	20,084	$	6,042	$	14,042	$	—
Derivatives		—		—		—		—
Total assets	$	20,084	$	6,042	$	14,042	$	—
Liabilities:
Derivatives	$	30,826	$	6,336	$	24,490	$	—

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Earnings (Loss) per Common Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings (Loss) per Common Share

Schedule of Weighted Average Number of Shares

	Three Months Ended September 30,		Nine Months Ended September 30,
	2021	2020	2021	2020
(In Thousands)
Weighted average shares outstanding:
Basic weighted average shares outstanding	15,302	15,147	15,293	15,144
Effect of dilutive securities	2,803	—	1,808	—
Diluted weighted average shares outstanding	18,105	15,147	17,101	15,144

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Workers Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2021

Workers Compensation Expense

Workers' compensation expense

Workers’ compensation expense consists of the following components:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Self-insured occupational disease benefits:
Service cost	$	1,949	$	1,892	$	5,847	$	5,674
Interest cost(1)		1,110		1,398		3,330		4,196
Net amortization(1)		590		297		1,772		892
Total occupational disease	$	3,649	$	3,587	$	10,949	$	10,762
Traumatic injury claims and assessments		1,779		2,030		5,449		6,312
Total workers’ compensation expense	$	5,428	$	5,617	$	16,398	$	17,074

(1) In accordance with the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” these costs are recorded within Nonoperating expenses in the Condensed Consolidated Statement of Operations on the line item “Non-service related pension and postretirement benefit costs.”

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Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2021

Employee Benefit Plans

Schedule of Pension Benefit Costs (Credits)

The following table details the components of pension benefit costs (credits):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Interest cost(1)	$	1,099	$	1,255	$	3,234	$	4,342
Expected return on plan assets(1)		(1,812)		(2,022)		(5,460)		(6,333)
Pension settlement(1)		(376)		(437)		(1,364)		(567)
Amortization of prior service costs (credits) (1)		(52)		(27)		(139)		(83)
Net benefit credit	$	(1,141)	$	(1,231)	$	(3,729)	$	(2,641)

The following table details the components of other postretirement benefit costs:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Service cost	$	86	$	104	$	256	$	316
Interest cost(1)		529		543		1,585		1,849
Amortization of other actuarial losses (gains)(1)		—		(160)		—		(1,219)
Net benefit cost	$	615	$	487	$	1,841	$	946

(1) In accordance with the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” these costs are recorded within Nonoperating expenses in the Condensed Consolidated Statement of Operations on the line item “Non-service related pension and postretirement benefit costs.”

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Segment Information (Tables)

9 Months Ended

Sep. 30, 2021

Segment Information

Schedule of Operating Segment Results

					Corporate,
					Other and
(In thousands)	MET		Thermal		Eliminations		Consolidated
Three Months Ended September 30, 2021
Revenues	$	295,291	$	299,096	$	25	$	594,412
Adjusted EBITDA		118,548		52,737		(39,690)		131,595
Depreciation, depletion and amortization		25,041		5,488		231		30,760
Accretion on asset retirement obligation		508		4,419		510		5,437
Total assets		965,252		193,060		772,637		1,930,949
Capital expenditures		61,504		507		2,078		64,089
Three Months Ended September 30, 2020
Revenues	$	168,054	$	213,299	$	908	$	382,261
Adjusted EBITDA		12,407		31,616		(26,597)		17,426
Depreciation, depletion and amortization		24,221		8,150		259		32,630
Accretion on asset retirement obligation		486		3,842		619		4,947
Total assets		759,202		216,708		677,427		1,653,337
Capital expenditures		57,424		568		(892)		57,100
Nine Months Ended September 30, 2021
Revenues	$	693,522	$	707,394	$	1,429	$	1,402,345
Adjusted EBITDA		221,391		107,589		(99,962)		229,018
Depreciation, depletion and amortization		68,577		15,170		694		84,441
Accretion on asset retirement obligation		1,523		13,256		1,532		16,311
Total assets		965,252		193,060		772,637		1,930,949
Capital expenditures		204,347		1,370		6,329		212,046
Nine Months Ended September 30, 2020
Revenues	$	489,660	$	597,887	$	19,467	$	1,107,014
Adjusted EBITDA		76,037		19,600		(76,028)		19,609
Depreciation, depletion and amortization		69,028		23,310		1,767		94,105
Accretion on asset retirement obligation		1,458		11,526		1,955		14,939
Total assets		759,202		216,708		677,427		1,653,337
Capital expenditures		193,586		9,381		2,694		205,661

Schedule of Reconciliation of Net Income (Loss) to Adjusted EBITDA

	Three Months Ended September 30,				Nine Months Ended September 30,
(In thousands)	2021		2020		2021		2020
Net income (loss)	$	89,143	$	(191,467)	$	110,967	$	(266,090)
Provision for (benefit from) income taxes		(1,082)		379		1,301		(206)
Interest expense, net		6,151		2,530		12,746		6,389
Depreciation, depletion and amortization		30,760		32,630		84,441		94,105
Accretion on asset retirement obligations		5,437		4,947		16,311		14,939
Costs related to proposed joint venture with Peabody Energy		—		4,423		—		15,938
Asset impairment and restructuring		—		163,106		—		176,371
Gain on property insurance recovery related to Mountain Laurel longwall		—		—		—		(23,518)
Gain on divestitures		—		—		—		(1,369)
Non-service related pension and postretirement benefit costs		1,186		878		3,252		3,076
Reorganization items, net		—		—		—		(26)
Adjusted EBITDA	$	131,595	$	17,426	$	229,018	$	19,609
EBITDA from idled or otherwise disposed operations		3,074		2,896		10,637		10,691
Selling, general and administrative expenses		21,081		21,541		66,679		64,024
Other		15,535		2,160		22,646		1,313
Segment Adjusted EBITDA from coal operations	$	171,285	$	44,023	$	328,980	$	95,637

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Revenue Recognition (Tables)

9 Months Ended

Sep. 30, 2021

Revenue Recognition

Schedule of effects of revenue recognition

					Corporate,
					Other and
	MET		Thermal		Eliminations		Consolidated
	(in thousands)
Three Months Ended September 30, 2021
North America revenues	$	52,654	$	247,955	$	25	$	300,634
Seaborne revenues		242,637		51,141		—		293,778
Total revenues	$	295,291	$	299,096	$	25	$	594,412
Three Months Ended September 30, 2020
North America revenues	$	47,197	$	208,273	$	908	$	256,378
Seaborne revenues		120,857		5,026		—		125,883
Total revenues	$	168,054	$	213,299	$	908	$	382,261
Nine Months Ended September 30, 2021
North America revenues	$	124,782	$	612,406	$	1,429	$	738,617
Seaborne revenues		568,740		94,988		—		663,728
Total revenues	$	693,522	$	707,394	$	1,429	$	1,402,345
Nine Months Ended September 30, 2020
North America revenues	$	117,058	$	579,380	$	19,467	$	715,905
Seaborne revenues		372,602		18,507		—		391,109
Total revenues	$	489,660	$	597,887	$	19,467	$	1,107,014

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Leases (Tables)

9 Months Ended

Sep. 30, 2021

Leases

Schedule of right-of-use assets and lease liabilities

		September 30,		December 31,
		2021		2020
Assets	Balance Sheet Classification
Operating lease right-of-use assets	Other noncurrent assets	$	15,127	$	17,069
Financing lease right-of-use assets	Other noncurrent assets		4,539		5,512
Total Lease Assets		$	19,666	$	22,581
Liabilities	Balance Sheet Classification
Financing lease liabilities - current	Accrued expenses and other current liabilities	$	902	$	860
Operating lease liabilities - current	Accrued expenses and other current liabilities		2,515		2,454
Financing lease liabilities - long-term	Other noncurrent liabilities		4,332		5,014
Operating lease liabilities - long-term	Other noncurrent liabilities		13,272		15,278
		$	21,021	$	23,606
Weighted average remaining lease term in years
Operating leases			5.25
Finance leases			3.50
Weighted average discount rate
Operating leases			5.5%
Finance leases			6.4%

Schedule of Information Related to Leases

		Three Months Ended September 30,					Nine Months Ended September 30,
		2021		2020			2021		2020
	(In thousands)					(In thousands)
Operating lease information:
Operating lease cost		$	841	$	846		$	2,533	$	2,774
Operating cash flows from operating leases			865		860			2,551		2,787
Financing lease information:
Financing lease cost		$	393	$	393		$	1,179	$	1,179
Operating cash flows from financing leases			303		303			909		909

Schedule of Future Minimum Lease Payments

Future minimum lease payments under non-cancellable leases as of September 30, 2021 were as follows:

	Operating		Finance
Year	Leases		Leases
	(In thousands)
2021	$	816	$	303
2022		3,317		1,210
2023		3,285		1,210
2024		3,200		1,210
2025		3,185		2,111
Thereafter		4,613		—
Total minimum lease payments	$	18,416	$	6,044
Less imputed interest		(2,629)		(810)
Total lease liabilities	$	15,787	$	5,234

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Joint Venture with Peabody Energy (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Implementation Agreement
Schedule of Equity Method Investments [Line Items]
Incurred expenses related to regulatory approval process	$ 0.0	$ 4.4	$ 0.0	$ 15.9

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Gain on Property Insurance Recovery Related to Mountain Laurel Longwall (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($) item
Business Interruption Loss [Line Items]
Gain on Business Interruption Insurance Recovery			$ 23,518
Longwall system's not recoverable | item			123
Hydraulic Shields not recoverable | item			176
Mountain Laurel Longwall Operations
Business Interruption Loss [Line Items]
Gain on Business Interruption Insurance Recovery			$ 23,500
Amounts related to the property insurance recovery	$ 0	$ 0

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Asset Impairment and Restructuring (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($) employee	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($) employee
Property, Plant and Equipment [Line Items]
Severance Costs	$ 0.0	$ 13.3	$ 0.0	$ 13.3
Number of corporate staff accepted voluntary separation package | employee		53		53
Number of Employees accepted voluntary separation package | employee		201		201
Knight Hawk
Property, Plant and Equipment [Line Items]
Asset impairment charges	$ 36.2		$ 36.2
Coal Creek Mine
Property, Plant and Equipment [Line Items]
Asset impairment charges		$ 51.8		$ 51.8
Viper Mine
Property, Plant and Equipment [Line Items]
Asset impairment charges		33.5		33.5
West Elk Mine
Property, Plant and Equipment [Line Items]
Asset impairment charges		$ 41.6		$ 41.6

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Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 283,561
Ending Balance	414,643
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(35,701)
Unrealized gains (losses)	6,709
Amounts reclassified from AOCI	1,835
Ending Balance	(27,157)
Derivative instruments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(3,891)
Unrealized gains (losses)	35
Amounts reclassified from AOCI	1,591
Ending Balance	(2,265)
Pension, postretirement and other post-employment benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(31,459)
Unrealized gains (losses)	6,429
Amounts reclassified from AOCI	269
Ending Balance	(24,761)
Available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(351)
Unrealized gains (losses)	245
Amounts reclassified from AOCI	(25)
Ending Balance	$ (131)

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Accumulated Other Comprehensive Income (Schedule of Reclassifications) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Revenues	$ 594,412	$ 382,261	$ 1,402,345	$ 1,107,014
Interest expense	(6,151)	(2,989)	(13,220)	(9,900)
Interest and investment income		459	474	3,511
Income (loss) before income taxes	88,061	(191,088)	112,268	(266,296)
Provision for (benefit from) income taxes	1,082	(379)	(1,301)	206
Net income (loss)	89,143	(191,467)	110,967	(266,090)
Reclassification out of Accumulated Other Comprehensive Income | Derivative instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Revenues		98		294
Interest expense	(336)	(638)	(1,591)	(1,502)
Provision for (benefit from) income taxes	0	0	0	0
Net income (loss)	(336)	(540)	(1,591)	(1,208)
Reclassification out of Accumulated Other Comprehensive Income | Pension, postretirement and other post-employment benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of actuarial gains (losses), net	(590)	(138)	(1,772)	328
Amortization of prior service credits	52	30	139	84
Pension settlement	376	437	1,364	567
Provision for (benefit from) income taxes	0	0	0	0
Net income (loss)	(162)	329	(269)	979
Reclassification out of Accumulated Other Comprehensive Income | Available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest and investment income	(1)	128	25	140
Provision for (benefit from) income taxes	0	0	0	0
Net income (loss)	$ (1)	$ 128	$ 25	$ 140

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Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Inventories
Coal	$ 74,422	$ 49,436
Repair parts and supplies	81,448	76,572
Inventories	155,870	126,008
Allowance for slow-moving and obsolete inventories	$ 800	$ 600

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Investments in Available-for-Sale Securities (Schedule of Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Cost Basis	$ 20,215	$ 97,116
Available-for-sale, Gains		12
Available-for-sale, Losses	(131)	(363)
Available-for-sale, Fair Value	20,084	96,765
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Cost Basis	6,075	57,299
Available-for-sale, Gains		11
Available-for-sale, Losses	(33)	(86)
Available-for-sale, Fair Value	6,042	57,224
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, Cost Basis	14,140	39,817
Available-for-sale, Gains		1
Available-for-sale, Losses	(98)	(277)
Available-for-sale, Fair Value	$ 14,042	$ 39,541

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Investments in Available-for-Sale Securities (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Investments in Available-for-Sale Securities
Unrealized losses owned for less than 12 months	$ 2.0	$ 45.3
Unrealized losses owed for over a year	$ 18.1	$ 8.1

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Derivatives (Narrative) (Details) gal in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($) gal	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Current asset representing cash collateral posted	$ 25.1	$ 1.4
Coal Contract
Derivative [Line Items]
Value of trading portfolio realized - gains (losses)	0.1
Call Option | Heating Oil
Derivative [Line Items]
Notional Amount	$ 0.0
Not Designated as Hedging Instrument | Diesel Purchases | Minimum
Derivative [Line Items]
Diesel fuel purchased annually (in gallons) | gal	35
Not Designated as Hedging Instrument | Diesel Purchases | Maximum
Derivative [Line Items]
Diesel fuel purchased annually (in gallons) | gal	40

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Derivatives (Schedule of Price Risk Derivatives) (Details) T in Thousands	9 Months Ended
	Sep. 30, 2021 T
Coal sales.
Derivative [Line Items]
Derivatives held (in tons)	371
Coal purchases.
Derivative [Line Items]
Derivatives held (in tons)	64
2021 | Coal sales.
Derivative [Line Items]
Derivatives held (in tons)	338
2021 | Coal purchases.
Derivative [Line Items]
Derivatives held (in tons)	31
2022 | Coal sales.
Derivative [Line Items]
Derivatives held (in tons)	33
2022 | Coal purchases.
Derivative [Line Items]
Derivatives held (in tons)	33

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Derivatives (Disclosure Of Fair Value Of Derivatives) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivative Assets	$ 11,001	$ 3,245
Derivative Liabilities	(39,562)	(2,399)
Effect of counterparty netting in derivative assets	(11,001)	(2,392)
Effect of counterparty netting in derivative liabilities	11,001	2,392
Derivative Asset		853
Derivative Liability	(28,561)	(7)
Net derivatives as classified in the balance sheets	(28,561)	846
Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Assets	11,001	3,245
Derivative Liabilities	(39,562)	(2,399)
Not Designated as Hedging Instrument | Coal Contract
Derivative [Line Items]
Derivative Assets	7,768	1,914
Derivative Liabilities	(7,688)	(1,595)
Coal Contract | Designated as Hedging Instrument
Derivative [Line Items]
Derivative Liabilities		0
Coal Contract | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Assets	3,233	1,094
Derivative Liabilities	$ (31,874)	(804)
Heating oil - diesel purchases | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative Assets		237
Derivative Liabilities		$ 0

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Derivatives (Net Derivatives As Reflected On The Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Net derivatives as classified in the balance sheet	$ (28,561)	$ 846
Heating oil and coal | Other current assets
Derivatives, Fair Value [Line Items]
Net derivatives as classified in the balance sheet		853
Coal Contract | Accrued expenses and other current liabilities
Derivatives, Fair Value [Line Items]
Net derivatives as classified in the balance sheet	$ (28,561)	$ (7)

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Derivatives (Effects Of Derivatives On Measures Of Financial Performance) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of coal derivatives and coal trading activities, net	$ (19,641)	$ (2,649)	$ (28,931)	$ (3,263)
Designated as Hedging Instrument | Coal Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income				4
Gains (Losses) Reclassified from Other Comprehensive Income into Income		(98)		(294)
Designated as Hedging Instrument | Coal sales. | Coal Contract | Coal sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income		(25)		574
Gains (Losses) Reclassified from Other Comprehensive Income into Income		(569)		(1,471)
Designated as Hedging Instrument | Coal purchases. | Coal Contract | Coal purchases
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income	0	25		(570)
Gains (Losses) Reclassified from Other Comprehensive Income into Income	0	471		1,177
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of coal derivatives and coal trading activities, net			(28,931)	(3,263)
Not Designated as Hedging Instrument | Coal Contract
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of coal derivatives and coal trading activities, net	(19,641)	(2,649)
Not Designated as Hedging Instrument | Coal Contract | Coal and natural gas realized and unrealized
Derivative Instruments, Gain (Loss) [Line Items]
Realized and Unrealized Gain (Loss) on Derivatives		1		222
Unrealized Gain (Loss) on Derivatives	(19,641)	(2,650)	(28,931)	(3,561)
Not Designated as Hedging Instrument | Coal Contract | Other operating (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives	$ (6,495)	2,593	$ (7,008)	6,950
Not Designated as Hedging Instrument | Natural gas | Coal and natural gas realized and unrealized
Derivative Instruments, Gain (Loss) [Line Items]
Realized and Unrealized Gain (Loss) on Derivatives				76
Not Designated as Hedging Instrument | Heating oil - diesel purchases | Other operating (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Heating oil realized and unrealized gains and losses		$ (184)		$ (889)

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Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accrued Expenses and Other Current Liabilities.
Payroll and employee benefits	$ 59,655	$ 39,443
Taxes other than income taxes	54,130	56,232
Interest	4,346	2,795
Workers' compensation	13,860	15,259
Asset retirement obligations	27,032	27,032
Coal derivatives	28,561	7
Other	10,684	14,488
Accrued expenses and other current liabilities	$ 198,268	$ 155,256

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Debt and Financing Arrangements (Long term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt issuance costs	$ (10,959)	$ (10,873)
Total	555,033	508,312
Less: current maturities of debt	138,587	31,097
Long-term debt	416,446	477,215
Term loan due 2024
Debt Instrument [Line Items]
Long-term debt	285,943	288,033
Debt instrument, face amount	286,500
Tax Exempt Bonds
Debt Instrument [Line Items]
Long-term debt	98,075	53,090
Debt instrument, face amount	98,100
Convertible Debt
Debt Instrument [Line Items]
Long-term debt	119,979	115,367
Debt instrument, face amount	155,300
Other Debt
Debt Instrument [Line Items]
Long-term debt	$ 61,995	$ 62,695

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Debt and Financing Arrangements (Company Debt Narrative) (Details) $ / shares in Units, shares in Millions							1 Months Ended		3 Months Ended	9 Months Ended		12 Months Ended
	Jul. 29, 2021 USD ($) installment	Nov. 03, 2020 USD ($) item $ / shares	Oct. 29, 2020 USD ($) $ / shares shares	Jul. 02, 2020 USD ($)	Mar. 04, 2020 USD ($) installment	Mar. 07, 2017 USD ($)	Sep. 30, 2020 USD ($)	Aug. 31, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2018	Mar. 04, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 29, 2020 USD ($)
Debt Instrument [Line Items]
Restricted Cash							$ 13,919,000		$ 1,101,000	$ 1,101,000	$ 13,919,000			$ 5,953,000
Net proceeds of convertible debt										155,300,000
Derivative liabilities									39,562,000	39,562,000				$ 2,399,000
Debt financing costs										2,057,000	3,528,000
Equity components liability of the convertible notes										114,500,000
Equity components of the convertible notes									$ 40,800,000	$ 40,800,000
Hypothetical interest rate (as percent)									12.43%	12.43%
Discount amortized									$ 40,800,000	$ 40,800,000
Deferred Offering Costs									5,900,000	5,900,000
Debt issuance costs									4,400,000	$ 4,400,000
Amortized as interest expense over the term										5 years
Transaction costs										$ 1,500,000
New Term Loan Debt Facility | Senior Notes
Debt Instrument [Line Items]
Term loan, face value						$ 300,000,000
Percentage of face amount						99.50
Quarterly principal amortization payments						$ 750,000
Amount of voting equity interests of domestic subsidiaries guaranteed (percent)						100
Amount of voting equity interests of foreign owned subsidiaries guaranteed (percent)						65
New Term Loan Debt Facility | Senior Notes | LIBOR
Debt Instrument [Line Items]
Applicable margin on interest rate										2.75%
New Term Loan Debt Facility | Line of Credit | LIBOR
Debt Instrument [Line Items]
Applicable margin on interest rate												2.75%
New Term Loan Debt Facility | Line of Credit | LIBOR | Minimum
Debt Instrument [Line Items]
Applicable margin on interest rate												1.00%
New Term Loan Debt Facility | Line of Credit | Base Rate
Debt Instrument [Line Items]
Applicable margin on interest rate												1.75%
Interest Rate Swap
Debt Instrument [Line Items]
Derivative liabilities									2,300,000	$ 2,300,000
Gain (loss) on interest rate swap									(300,000)	(1,600,000)
Accounts Receivable Securitization Facility | Line of Credit | Secured Debt
Debt Instrument [Line Items]
Letters of credit outstanding									61,200,000	61,200,000
Accounts Receivable Securitization Facility | Regions Bank | Line of Credit | Secured Debt
Debt Instrument [Line Items]
Current borrowing capacity							110,000,000				110,000,000				$ 160,000,000
Accounts Receivable Securitization Facility | Arch Receivable Company, LLC | Line of Credit | Secured Debt
Debt Instrument [Line Items]
Current borrowing capacity									30,500,000	30,500,000
Inventory-Based Revolving Credit Facility
Debt Instrument [Line Items]
Covenant amount										13,300,000
Inventory-Based Revolving Credit Facility | Regions Bank | Line of Credit | Secured Debt
Debt Instrument [Line Items]
Term loan, face value							50,000,000				$ 50,000,000
Letters of credit outstanding									27,700,000	27,700,000
Borrowing base percentage, coal inventory											85
Borrowing base percentage, parts and supplies inventory											85
Borrowing base, percentage of clause											35
Percent of eligible cash											100.00%
Covenant amount							$ 100,000,000	$ 175,000,000			$ 100,000,000
Equipment financing arrangement | Secured Debt
Debt Instrument [Line Items]
Term loan, face value	$ 23,500,000				$ 53,600,000
Number of monthly payments | installment	42				48
Interest rate	7.35%				6.34%
Tax Exempt Bonds
Debt Instrument [Line Items]
Term loan, face value									98,100,000	98,100,000
Tax Exempt Bonds | Minimum
Debt Instrument [Line Items]
Covenant for cross-events of default to indebtedness											$ 50,000,000
Series 2020 Tax Exempt Bonds
Debt Instrument [Line Items]
Term loan, face value				$ 53,100,000
Interest rate				5.00%
Mandatory tender percentage				100.00%
Series 2021 Tax Exempt Bonds
Debt Instrument [Line Items]
Term loan, face value													$ 45,000,000.0
Interest rate													4.125%
Convertible Notes
Debt Instrument [Line Items]
Term loan, face value		$ 155,300,000
Interest rate		5.25%
Net proceeds of convertible debt		$ 132,700,000
Initial Conversion ratio		0.267917
Initial Conversion price (in dollars per share) | $ / shares		$ 37.325
Convertible debt, current									120,000,000.0	120,000,000.0
Stock price trigger (as a percent)		130.00%
Trading days, number | item		20
Convertible Notes exceeded the principal amount										230,500,000
Consecutive trading days, period | item		30
Total interest expense									3,800,000	11,200,000
Contractual interest coupon									2,000,000.0	6,100,000
Amortization of debt discount									$ 1,800,000	$ 5,100,000
Deferred Offering Costs		$ 5,100,000
Capped Call Transactions
Debt Instrument [Line Items]
Initial strike price (in dollars per share) | $ / shares			$ 37.325
Number of underlying shares | shares			4.2
Cap price | $ / shares			$ 52.2550
Premium percentage (as percent)			75.00%
Capped call, transaction cost		$ 17,500,000	$ 17,500,000

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Debt and Financing Arrangements (Interest rate derivatives) (Details) - June 30, 2021 $ in Millions	Sep. 30, 2021 USD ($)
Debt Instrument [Line Items]
Notional Amount	$ 100.0
Fixed Rate	2.315%

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Taxes
Income tax provision (benefit) at statutory rate	$ 18,493	$ (40,128)	$ 23,576	$ (55,922)
Percentage depletion and other perm items	(3,357)	2,242	(6,313)	(3,358)
State taxes, net of effect of federal taxes	944	(2,695)	1,832	(4,197)
Change in valuation allowance	(15,984)	40,734	(18,814)	61,115
Current expense associated with uncertain tax positions	(1,128)	226	1,081	3,327
AMT sequestration refund				(1,171)
Other, net	(50)		(61)
Provision for (benefit from) income taxes	$ (1,082)	$ 379	$ 1,301	$ (206)

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Fair Value Measurements (Financial Assets And Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Investments in marketable securities	$ 20,084	$ 96,765
Total assets	20,084
Liabilities:
Derivatives	30,826
Level 1
Assets:
Investments in marketable securities	6,042
Derivatives	0
Total assets	6,042
Liabilities:
Derivatives	6,336
Level 2
Assets:
Investments in marketable securities	14,042
Total assets	14,042
Liabilities:
Derivatives	24,490
Level 3
Assets:
Investments in marketable securities	0
Derivatives	0
Total assets	0
Liabilities:
Derivatives	$ 0

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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value Measurements
Fair value of debt, including amounts classified as current	$ 815.2	$ 533.8

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Earnings (Loss) per Common Share (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Nov. 03, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities excluded	178,333		169,555
Weighted average shares outstanding:
Basic weighted average shares outstanding (in shares)	15,302,000	15,147,000	15,293,000	15,144,000
Effect of dilutive securities (in shares)	2,803,000		1,808,000
Diluted weighted average shares outstanding (in shares)	18,105,000	15,147,000	17,101,000	15,144,000
Convertible Notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities excluded			1,338,444
Weighted average shares outstanding:
Effect of dilutive securities (in shares)	1,915,000
Debt Instrument [Line Items]
Initial Conversion price (in dollars per share)					$ 37.325

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Workers Compensation Expense (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 29, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accrued Workers Compensation [Line Items]
Additional collateral amount	$ 71,100
Number of days required to submit additional collateral to retain self-insurance status	30 days
Occupational disease
Accrued Workers Compensation [Line Items]
Service cost		$ 1,949	$ 1,892	$ 5,847	$ 5,674
Interest cost		1,110	1,398	3,330	4,196
Amortization of other actuarial losses (gains)		590	297	1,772	892
Net benefit cost (credit)		3,649	3,587	10,949	10,762
Traumatic injury claims and assessments
Accrued Workers Compensation [Line Items]
Traumatic injury claims and assessments		1,779	2,030	5,449	6,312
Total workers' compensation expense
Accrued Workers Compensation [Line Items]
Total workers' compensation expense		$ 5,428	$ 5,617	$ 16,398	$ 17,074

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Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined benefit pension plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1,099	$ 1,255	$ 3,234	$ 4,342
Expected return on plan assets	(1,812)	(2,022)	(5,460)	(6,333)
Pension settlement	(376)	(437)	(1,364)	(567)
Amortization of prior service costs (credits)	(52)	(27)	(139)	(83)
Net benefit cost (credit)	(1,141)	(1,231)	(3,729)	(2,641)
Other postretirement benefits plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	86	104	256	316
Interest cost	529	543	1,585	1,849
Amortization of other actuarial losses (gains)		(160)		(1,219)
Net benefit cost (credit)	$ 615	$ 487	$ 1,841	$ 946

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Segment Information (Schedule Of Operating Segment Results) (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment item	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) segment
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2		3
Number of remaining active thermal mines | item			3
Number of distinct lines of business			$ 2
Revenues	$ 594,412,000	$ 382,261,000	1,402,345,000	$ 1,107,014,000
Adjusted EBITDA	131,595,000	17,426,000	229,018,000	19,609,000
Depreciation, depletion and amortization	30,760,000	32,630,000	84,441,000	94,105,000
Accretion on asset retirement obligations	5,437,000	4,947,000	16,311,000	14,939,000
Total assets	1,930,949,000	1,653,337,000	1,930,949,000	1,653,337,000	$ 1,722,472,000
Capital expenditures	64,089,000	57,100,000	212,046,000	205,661,000
Operating Segments | MET
Segment Reporting Information [Line Items]
Revenues	295,291,000	168,054,000	693,522,000	489,660,000
Adjusted EBITDA	118,548,000	12,407,000	221,391,000	76,037,000
Depreciation, depletion and amortization	25,041,000	24,221,000	68,577,000	69,028,000
Accretion on asset retirement obligations	508,000	486,000	1,523,000	1,458,000
Total assets	965,252,000	759,202,000	965,252,000	759,202,000
Capital expenditures	61,504,000	57,424,000	204,347,000	193,586,000
Operating Segments | Thermal
Segment Reporting Information [Line Items]
Revenues	299,096,000	213,299,000	707,394,000	597,887,000
Adjusted EBITDA	52,737,000	31,616,000	107,589,000	19,600,000
Depreciation, depletion and amortization	5,488,000	8,150,000	15,170,000	23,310,000
Accretion on asset retirement obligations	4,419,000	3,842,000	13,256,000	11,526,000
Total assets	193,060,000	216,708,000	193,060,000	216,708,000
Capital expenditures	507,000	568,000	1,370,000	9,381,000
Corporate, Other and Eliminations
Segment Reporting Information [Line Items]
Revenues	25,000	908,000	1,429,000	19,467,000
Adjusted EBITDA	(39,690,000)	(26,597,000)	(99,962,000)	(76,028,000)
Depreciation, depletion and amortization	231,000	259,000	694,000	1,767,000
Accretion on asset retirement obligations	510,000	619,000	1,532,000	1,955,000
Total assets	772,637,000	677,427,000	772,637,000	677,427,000
Capital expenditures	$ 2,078,000	$ (892,000)	$ 6,329,000	$ 2,694,000

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Segment Information (Reconciliation Segment Income To Consolidated Income Before Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Information
Net income (loss)	$ 89,143	$ (191,467)	$ 110,967	$ (266,090)
Provision for (benefit from) income taxes	(1,082)	379	1,301	(206)
Interest expense, net	6,151	2,530	12,746	6,389
Depreciation, depletion and amortization	30,760	32,630	84,441	94,105
Accretion on asset retirement obligations	5,437	4,947	16,311	14,939
Costs related to proposed joint venture with Peabody Energy		4,423		15,938
Asset impairment and restructuring		163,106		176,371
Gain on property insurance recovery related to Mountain Laurel longwall				(23,518)
Gain on divestitures				(1,369)
Non-service related pension and postretirement benefit costs	1,186	878	3,252	3,076
Reorganization items, net				(26)
Adjusted EBITDA	131,595	17,426	229,018	19,609
EBITDA from idled or otherwise disposed operations	3,074	2,896	10,637	10,691
Selling, general and administrative expenses	21,081	21,541	66,679	64,024
Other	15,535	2,160	22,646	1,313
Segment Adjusted EBITDA from coal operations	$ 171,285	$ 44,023	$ 328,980	$ 95,637

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Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 594,412	$ 382,261	$ 1,402,345	$ 1,107,014
Corporate, Other and Eliminations
Disaggregation of Revenue [Line Items]
Revenues	25	908	1,429	19,467
North America revenues
Disaggregation of Revenue [Line Items]
Revenues	300,634	256,378	738,617	715,905
North America revenues | Corporate, Other and Eliminations
Disaggregation of Revenue [Line Items]
Revenues	25	908	1,429	19,467
Seaborne revenues
Disaggregation of Revenue [Line Items]
Revenues	293,778	125,883	663,728	391,109
Seaborne revenues | Corporate, Other and Eliminations
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
MET | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	295,291	168,054	693,522	489,660
MET | North America revenues | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	52,654	47,197	124,782	117,058
MET | Seaborne revenues | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	242,637	120,857	568,740	372,602
Thermal | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	299,096	213,299	707,394	597,887
Thermal | North America revenues | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	247,955	208,273	612,406	579,380
Thermal | Seaborne revenues | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues	$ 51,141	$ 5,026	$ 94,988	$ 18,507

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Revenue Recognition (Narrative) (Details) T in Millions	Sep. 30, 2021 T
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, fixed price contracts (in tons)	20.0
Remaining performance obligations, variable price contracts (in tons)	2.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, fixed price contracts (in tons)	91.2
Remaining performance obligations, variable price contracts (in tons)	4.2

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Leases (Narrative) (Details)	Sep. 30, 2021
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease terms	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease terms	6 years

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Leases (Lease Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Operating lease right-of-use assets	$ 15,127	$ 17,069
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent	Other Assets, Noncurrent
Financing lease right-of-use assets	$ 4,539	$ 5,512
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent	Other Assets, Noncurrent
Total Lease Assets	$ 19,666	$ 22,581
Liabilities
Financing lease liabilities - current	$ 902	$ 860
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current	Accrued Liabilities, Current
Operating lease liabilities - current	$ 2,515	$ 2,454
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current	Accrued Liabilities, Current
Financing lease liabilities - long-term	$ 4,332	$ 5,014
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Operating lease liabilities - long-term	$ 13,272	$ 15,278
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Total Lease Liabilities	$ 21,021	$ 23,606

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Leases (Weighted Average Lease Term And Discount Rate) (Details)	Sep. 30, 2021
Leases
Weighted average remaining lease term in years	5 years 3 months
Weighted average remaining lease term in years	3 years 6 months
Weighted average discount rate	5.50%
Weighted average discount rate	6.40%

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Leases (Other Information Related to Leases) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Lease information:
Operating lease cost	$ 841	$ 846	$ 2,533	$ 2,774
Operating cash flows from operating leases	865	860	2,551	2,787
Financing lease cost	393	393	1,179	1,179
Operating cash flows from financing leases	$ 303	$ 303	$ 909	$ 909

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Leases (Future Minimum Lease Payments) (Details) $ in Thousands	Sep. 30, 2021 USD ($)
Operating Leases
2021	$ 816
2022	3,317
2023	3,285
2024	3,200
2025	3,185
Thereafter	4,613
Total minimum lease payments	18,416
Less imputed interest	(2,629)
Total operating lease liability	15,787
Finance Leases
2021	303
2022	1,210
2023	1,210
2024	1,210
2025	2,111
Total minimum lease payments	6,044
Less imputed interest	(810)
Total finance lease liability	$ 5,234

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Subsequent Events (Details) - Subsequent Event $ / shares in Units, $ in Millions	Oct. 26, 2021 USD ($) $ / shares
Subsequent Event [Line Items]
Quarterly dividend | $ / shares	$ 0.25
Dividends payable | $	$ 3.8