Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020		Jun. 30, 2019
Net Income (Loss) Attributable to Coeur Stockholders
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ (1,209)		$ (36,764)		$ (13,109)		$ (61,658)
Income (loss) from discontinued operations	0		0		0		5,693
NET INCOME (LOSS)	$ (1,209)	$ (11,900)	$ (36,764)	$ (19,201)	$ (13,109)		$ (55,965)
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic	240,945,000		207,809,000		240,600,000		205,103,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0		0		0		0
Weighted Average Number of Shares Outstanding, Diluted	240,945,000		207,809,000		240,600,000		205,103,000
Basic EPS
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.01)		$ (0.18)		$ (0.05)		$ (0.30)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0		0		0		0.03
Earnings Per Share, Basic	(0.01)		(0.18)		(0.05)	[1]	(0.27)	[1]
Diluted EPS
Income (Loss) from Continuing Operations, Per Diluted Share	(0.01)		(0.18)		(0.05)		(0.30)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0		0		0		0.03
Earnings Per Share, Diluted	$ (0.01)		$ (0.18)		$ (0.05)	[1]	$ (0.27)	[1]
Stock Options
Earnings Per Share (Textual) [Abstract]
Number of antidilutive shares of common stock equivalents	1,816,332		3,241,533		3,205,676		3,241,533

[1] Due to rounding, the sum of net income per share from continuing operations and discontinued operations may not equal net income per share.