Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net Income (Loss) Attributable to Coeur Stockholders
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 691	$ 18,299
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	550	364
Net income (loss)	$ 1,241	$ 18,663
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic	184,367,000	178,898,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	3,254,000	4,170,000
Weighted Average Number of Shares Outstanding, Diluted	187,621,000	183,068,000
Basic EPS
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.004	$ 0.10
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.003	0.00
Earnings Per Share, Basic	0.007	0.10
Diluted EPS
Income (Loss) from Continuing Operations, Per Diluted Share	0.004	0.10
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0.003	0.00
Earnings Per Share, Diluted	$ 0.007	$ 0.10
Stock Options [Member]
Earnings Per Share (Textual) [Abstract]
Number of antidilutive shares of common stock equivalents	496,064	1,368,685