Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share (Textual) [Abstract]
Number of antidilutive shares of common stock equivalents	1,513,288			182,803			1,489,158	1,722,014
Net Income (Loss) Attributable to Coeur Stockholders
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ (54,768)			$ 26,856			$ (20,562)	$ 13,747
NET INCOME (LOSS)	$ (54,768)	$ 32,146	$ 2,060	$ 26,856	$ (1,209)	$ (11,900)	$ (20,562)	$ 13,747
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic	254,744,000			240,983,000			247,675,000	240,729,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	0			2,866,000			0	1,277,000
Weighted Average Number of Shares Outstanding, Diluted	254,744,000			243,849,000			247,675,000	242,006,000
Basic EPS
Earnings Per Share, Basic	$ (0.21)			$ 0.11			$ (0.08)	$ 0.06
Diluted EPS
Earnings Per Share, Diluted	$ (0.21)			$ 0.11			$ (0.08)	$ 0.06