Discontinued Operations (Tables)

12 Months Ended

Dec. 31, 2019

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Major Classes of Assets and Liabilities

	Year ended December 31,
	2019		2018			2017
Revenue	$	—	$	12,346		$	73,065
COSTS AND EXPENSES
Costs applicable to sales(1)	—		12,269			74,074
Amortization	—		—			5,899
General and administrative	—		41			172
Exploration	—		—			23
Write-downs	—		—			3,390
Pre-development, reclamation, and other	—		265			4,664
OTHER INCOME (EXPENSE), NET
Interest expense, net of capitalized interest	—		(3		)	(27		)
Other, net	—		(260		)	1,763
Pretax profit (loss) on discontinued operations related to major classes of pretax profit (loss)	—		(492		)	(13,421		)
Pretax gain on the disposal of the discontinued operation	5,693		1,525			—
Total pretax gain or loss on discontinued operations	5,693		1,033			(13,421		)
Income and mining tax (expense) benefit	—		(483		)	1,177
Income (loss) from discontinued operations	$	5,693	$	550		$	(12,244	)

(1) Excludes amortization.