Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net income (loss)	$ 21,824	$ (74,623)
Adjustments to reconcile to cash from operating activities:
Depreciation, depletion and amortization	53,681	61,475
Accretion on asset retirement obligations	10,874	9,992
Deferred income taxes	11	13,880
Employee stock-based compensation expense	8,498	8,936
Amortization relating to financing activities	3,110	1,946
Gain on property insurance recovery related to Mountain Laurel longwall		(23,518)
Gain on disposals and divestitures, net	(413)	(3,180)
Reclamation work completed	(28,218)	(6,207)
Changes in:
Receivables	(49,568)	55,817
Inventories	(36,523)	(23,792)
Accounts payable, accrued expenses and other current liabilities	14,590	(42,889)
Income taxes, net	2,337	22,918
Other	25,906	25,167
Cash provided by operating activities	26,109	25,922
Investing activities
Capital expenditures	(147,957)	(148,561)
Minimum royalty payments	(1,124)	(1,124)
Proceeds from disposals and divestitures	438	562
Purchases of short-term investments		(17,707)
Proceeds from sales of short-term investments	68,986	86,079
Investments in and advances to affiliates, net	(1,114)	(1,059)
Proceeds from property insurance recovery related to Mountain Laurel longwall		23,518
Cash used in investing activities	(80,771)	(58,292)
Financing activities
Payments on term loan	(1,500)	(1,500)
Proceeds from equipment financing		53,611
Proceeds from tax exempt bonds	44,985
Net payments on other debt	(18,795)	(13,592)
Debt financing costs	(1,537)	(1,171)
Dividends paid		(7,645)
Payments for taxes related to net share settlement of equity awards	(1,316)	(331)
Cash provided by financing activities	21,837	29,372
Decrease in cash and cash equivalents, including restricted cash	(32,825)	(2,998)
Cash and cash equivalents, including restricted cash, beginning of period	193,445	153,020
Cash and cash equivalents, including restricted cash, end of period	160,620	150,022
SUPPLEMENTAL CASH FLOW INFORMATION
Cash and cash equivalents	153,516	150,022
Restricted Cash	7,104
Cash and cash equivalents, including restricted cash, end of period	$ 160,620	$ 150,022

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