Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Net Income (Loss) Attributable to Coeur Stockholders
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent		$ (36,764)		$ 2,930		$ (61,658)	$ 3,621
Income (loss) from discontinued operations		0		0		5,693	550
NET INCOME (LOSS)		$ (36,764)	$ (19,201)	$ 2,930	$ 1,241	$ (55,965)	$ 4,171
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic		207,809,000		185,183,000		205,103,000	184,777,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements		0		2,305,000		0	2,780,000
Weighted Average Number of Shares Outstanding, Diluted		207,809,000		187,488,000		205,103,000	187,557,000
Basic EPS
Income (Loss) from Continuing Operations, Per Basic Share		$ (0.18)		$ 0.02		$ (0.30)	$ 0.02
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share		0		0		0.03	0
Earnings Per Share, Basic	[1]	(0.18)		0.02		(0.27)	0.02
Diluted EPS
Income (Loss) from Continuing Operations, Per Diluted Share		(0.18)		0.02		(0.30)	0.02
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share		0		0		0.03	0
Earnings Per Share, Diluted	[1]	$ (0.18)		$ 0.02		$ (0.27)	$ 0.02
Stock Options [Member]
Earnings Per Share (Textual) [Abstract]
Number of antidilutive shares of common stock equivalents				1,528,162		3,241,533	1,563,841

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