Acquisitions - Purchase Price Allocation (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	12 Months Ended
		Feb. 14, 2025	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Assets:
Short-term receivables			$ 23,292	$ 23,292
LIABILITIES
Goodwill			$ 625,812	$ 625,812	$ 0
Common stock, shares issued (in shares)			642,092,761	642,092,761	399,235,632
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				3,304,104
Common Stock
LIABILITIES
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				2,212,000
Common Stock | Royalty Settlement [Domain]
LIABILITIES
Common stock issued for investment (in shares)				595,000	738,000
SilverCrest
Business Combination [Line Items]
Common shares issued (value)		$ 1,580,000	$ 1,581,983
Fair value of replacement stock-based compensation awarded(1)	[1]		8,539
Fair value of Coeur payable to SilverCrest repurchased			72,311
Total purchase price			1,518,211
Assets:
Cash and cash equivalents			103,724	$ 103,724
Inventory			153,826	153,826
Prepaid expenses and other			15,213	15,213
Property, plant and equipment and mining properties			1,008,962	1,008,962
Other			5,596	5,596
Total Assets			1,310,613	1,310,613
LIABILITIES
Accounts payable			16,774	16,774
Accrued liabilities and other			25,636	25,636
Debt			846	846
Reclamation			10,870	10,870
Deferred tax liabilities	[2]		343,650	343,650
Other long-term liabilities			20,438	20,438
Total liabilities			418,214	418,214
Net assets acquired			892,399	892,399
Goodwill			625,812	625,812
Net assets acquired			$ 1,518,211	$ 1,518,211
Common stock, shares issued (in shares)		239,331,799	239,331,799	239,331,799
Shares issued (in dollars per share)			$ 6.61	$ 6.61
SilverCrest | Common Stock | SilverCrest Acquisition
LIABILITIES
Common stock issued for investment (in shares)				2,300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period				3,300,000

[1] As of December 31, 2025, 2.3 million common shares were issued related to the exercise of 3.3 million replacement options.

[2] Deferred income tax liabilities represent the future tax expense associated with the differences between the fair value allocated to assets (excluding goodwill) and liabilities and a tax basis increase to the fair value of the assets acquired in Mexico and the historical carryover tax basis of assets and liabilities in all other jurisdictions. No deferred tax liability is recognized for the basis difference inherent in the fair value allocated to goodwill.