Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net Income (Loss) Attributable to Coeur Stockholders
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 2,930	$ (9,995)	$ 3,621	$ 8,304
Income (loss) from discontinued operations	0	(960)	550	(596)
NET INCOME (LOSS)	$ 2,930	$ (10,955)	$ 4,171	$ 7,708
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic	185,183,000	179,241,000	184,777,000	179,071,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	2,305,000	0	2,780,000	4,049,000
Weighted Average Number of Shares Outstanding, Diluted	187,488,000	179,241,000	187,557,000	183,120,000
Basic EPS
Income (Loss) from Continuing Operations, Per Basic Share	$ 0.016	$ (0.056)	$ 0.020	$ 0.046
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0.000	(0.005)	0.003	(0.003)
Earnings Per Share, Basic	0.016	(0.061)	0.023	0.043
Diluted EPS
Income (Loss) from Continuing Operations, Per Diluted Share	0.016	(0.056)	0.019	0.045
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0.000	(0.005)	0.003	(0.003)
Earnings Per Share, Diluted	$ 0.016	$ (0.061)	$ 0.022	$ 0.042
Stock Options [Member]
Earnings Per Share (Textual) [Abstract]
Number of antidilutive shares of common stock equivalents	1,528,162	852,176	1,563,841	1,426,480