Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Earnings Per Share (Textual) [Abstract]
Number of antidilutive shares of common stock equivalents	800,000		1,100,000		800,000	2,800,000
Common stock, shares issued (in shares)	1,028,536,378				1,028,536,378		642,092,761
Common stock, par value (in dollars per share)	$ 0.01				$ 0.01		$ 0.01
Net Income (Loss) Attributable to Coeur Stockholders
NET INCOME (LOSS)	$ 121,853	$ 246,761	$ 70,726	$ 33,353	$ 368,614	$ 104,079
Weighted Average Number of Shares Outstanding
Weighted Average Number of Shares Outstanding, Basic	1,029,300,000		637,173,000		860,864,000	576,176,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	5,126,000		5,903,000		6,553,000	6,244,000
Weighted Average Number of Shares Outstanding, Diluted	1,034,426,000		643,076,000		867,417,000	582,420,000
Basic EPS
Earnings Per Share, Basic	$ 0.12		$ 0.11		$ 0.43	$ 0.18
Diluted EPS
Earnings Per Share, Diluted	$ 0.12		$ 0.11		$ 0.42	$ 0.18