Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue		$ 194,583	$ 182,993	$ 559,116	$ 575,520
COSTS AND EXPENSES
Amortization		22,884	29,151	65,187	83,549
General and administrative		9,512	9,722	31,384	29,281
Pre-development, reclamation, and other		8,680	9,249	29,618	29,839
Total costs and expenses		201,416	219,708	586,792	608,898
OTHER INCOME (EXPENSE), NET
Fair value adjustments, net, pretax		(2,010)	(13,067)	4,629	(65,272)
Interest expense, net of capitalized interest		(7,402)	(5,932)	(21,703)	(15,670)
Other, net	[1]	459	153	(10,421)	2,203
Total other income (expense), net		(8,179)	(18,846)	(23,760)	(78,739)
Income (loss) before income and mining taxes		(15,012)	(55,561)	(51,436)	(112,117)
Income and mining tax (expense) benefit		(6,097)	(1,883)	(26,671)	(15,079)
NET INCOME (LOSS)		(21,109)	(57,444)	(78,107)	(127,196)
OTHER COMPREHENSIVE INCOME (LOSS), Net of Tax:
Unrealized gain (loss) on hedger, net of tax		7,227	29,060	7,141	58,087
Reclassification adjustments for realized (gain) loss on cash flow hedges		4,920	9,910	7,830	11,181
Other comprehensive income (loss)		2,307	19,150	(689)	46,906
COMPREHENSIVE INCOME (LOSS)		$ (18,802)	$ (38,294)	$ (78,796)	$ (80,290)
Basic EPS
Earnings Per Share, Basic		$ (0.06)	$ (0.21)	$ (0.24)	$ (0.47)
Diluted EPS
Earnings Per Share, Diluted		$ (0.06)	$ (0.21)	$ (0.24)	$ (0.47)
Gain on debt extinguishment		$ 774	$ 0	$ 3,735	$ 0
Product
COSTS AND EXPENSES
Costs applicable to sales	[2]	147,903	163,180	440,596	447,126
Mineral, Exploration
COSTS AND EXPENSES
Costs applicable to sales		$ 12,437	$ 8,406	$ 20,007	$ 19,103

[1] See Note 13 -- Additional Comprehensive Income (Loss) Detail for additional detail

[2] Excludes amortization.