Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue		$ 182,993	$ 207,969	$ 575,520	$ 624,944
COSTS AND EXPENSES
Amortization		29,151	30,962	83,549	92,872
General and administrative		9,722	8,743	29,281	30,764
Pre-development, reclamation, and other		9,249	10,506	29,839	36,956
Total costs and expenses		219,708	199,942	608,898	573,177
OTHER INCOME (EXPENSE), NET
Loss on debt extinguishment		0	0	0	(9,173)
Fair value adjustments, net, pretax		(13,067)	(26,440)	(65,272)	7,000
Interest expense, net of capitalized interest		(5,932)	(3,237)	(15,670)	(13,240)
Other, net	[1]	153	(26,718)	2,203	(22,390)
Total other income (expense), net		(18,846)	(56,395)	(78,739)	(37,803)
Income (loss) before income and mining taxes		(55,561)	(48,368)	(112,117)	13,964
Income and mining tax (expense) benefit		(1,883)	(6,400)	(15,079)	(34,526)
NET INCOME (LOSS)		(57,444)	(54,768)	(127,196)	(20,562)
OTHER COMPREHENSIVE INCOME (LOSS), Net of Tax:
Unrealized gain (loss) on hedger, net of tax		29,060	1,349	58,087	25,723
Reclassification adjustments for realized (gain) loss on cash flow hedges		9,910	3,902	11,181	9,683
Other comprehensive income (loss)		19,150	(2,553)	46,906	16,040
COMPREHENSIVE INCOME (LOSS)		$ (38,294)	$ (57,321)	$ (80,290)	$ (4,522)
Basic EPS
Earnings Per Share, Basic		$ (0.21)	$ (0.21)	$ (0.47)	$ (0.08)
Diluted EPS
Earnings Per Share, Diluted		$ (0.21)	$ (0.21)	$ (0.47)	$ (0.08)
Accumulated Deficit [Member]
OTHER INCOME (EXPENSE), NET
NET INCOME (LOSS)		$ (57,444)	$ (54,768)
Product
COSTS AND EXPENSES
Costs applicable to sales	[2]	163,180	134,340	$ 447,126	$ 375,082
Mineral, Exploration
COSTS AND EXPENSES
Costs applicable to sales		$ 8,406	$ 15,391	$ 19,103	$ 37,503

[1] See Note 14 -- Additional Comprehensive Income (Loss) Detail for additional detail

[2] Excludes amortization.