Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Operations
Revenues	$ 867,936	$ 357,543
Costs, expenses and other operating
Cost of sales (exclusive of items shown separately below)	508,225	309,906
Depreciation, depletion and amortization	32,210	25,797
Accretion on asset retirement obligations	4,430	5,437
Change in fair value of coal derivatives and coal trading activities, net	15,519	528
Selling, general and administrative expenses	26,648	21,480
Other operating income, net	(3,439)	(5,268)
Costs, expenses and other operating	583,593	357,880
Income (loss) from operations	284,343	(337)
Interest expense, net
Interest expense	(7,047)	(4,128)
Interest and investment income	24	328
Interest expense, net	(7,023)	(3,800)
Income (loss) before nonoperating expenses	277,320	(4,137)
Nonoperating expenses
Non-service related pension and postretirement benefit costs	(873)	(1,527)
Net loss resulting from early retirement of debt	(4,120)
Nonoperating expenses	(4,993)	(1,527)
Income (loss) before income taxes	272,327	(5,664)
Provision for income taxes	455	378
Net income (loss)	$ 271,872	$ (6,042)
Net income (loss) per common share
Basic earnings (loss) per share (in dollars per share)	$ 17.60	$ (0.40)
Diluted earnings (loss) per share (in dollars per share)	$ 12.89	$ (0.40)
Weighted average shares outstanding
Basic weighted average shares outstanding (in shares)	15,448	15,283
Diluted weighted average shares outstanding (in shares)	21,271	15,283
Dividends declared per common share (in dollars per share)	$ 0.25