Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share (Textual) [Abstract]
Number of antidilutive shares of common stock equivalents	1,553,030		1,816,332		1,558,030	3,205,676
Net Income (Loss) Attributable to Coeur Stockholders
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 32,146		$ (1,209)		$ 34,206	$ (13,109)
NET INCOME (LOSS)	$ 32,146	$ 2,060	$ (1,209)	$ (11,900)	$ 34,206	$ (13,109)
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic	249,066,000		240,945,000		245,253,000	240,600,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	3,066,000		0		3,240,000	0
Weighted Average Number of Shares Outstanding, Diluted	252,132,000		240,945,000		248,493,000	240,600,000
Basic EPS
Earnings Per Share, Basic	$ 0.13		$ (0.01)		$ 0.14	$ (0.05)
Diluted EPS
Earnings Per Share, Diluted	$ 0.13		$ (0.01)		$ 0.14	$ (0.05)