Commitments and Contigencies (Details Textual)		1 Months Ended	3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
		Jan. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) t milestone	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Oct. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Oct. 02, 2014 USD ($)
Business Acquisition [Line Items]
Production to be sold, percent												50.00%
Price per ounce under agreement												$ 800
Aggregate deposit to be received												$ 20,000,000.0
Palmarejo Gold Stream Agreement, Deferred Revenue Unamortized Balance			$ 10,000,000.0				$ 10,000,000.0
Deferred Revenue Recognized			5,485,000	$ 15,250,000			21,167,000	$ 16,008,000
Silvertip acquisition contingent consideration			0				0		$ 25,000,000
Payment for Contingent Consideration Liability, Financing Activities			0	0			18,750,000	0
Common stock issued under "at the market" stock offering				73,781,000	$ 48,887,000
Value Added Tax Receivable, Noncurrent	[1]		23,493,000				23,493,000		28,009,000
Surety Bonds Outstanding			212,800,000				$ 212,800,000		215,600,000
Palmarejo gold production royalty
Business Acquisition [Line Items]
Production to be sold, percent													50.00%
Price per ounce under agreement													$ 800
Aggregate deposit to be received													$ 22,000,000.0
JDS Silver Holdings Ltd.
Business Acquisition [Line Items]
Silvertip acquisition contingent consideration											$ 50,000,000.0
Long-term Purchase Commitment, Milestones | milestone							2
JDS Silver Holdings Ltd. | Permit Contingent Consideration
Business Acquisition [Line Items]
Silvertip acquisition contingent consideration											$ 25,000,000.0
Sustained minim and milling per day (in tones) | t							1,000
Silvertip [Member] | Permit Contingent Consideration
Business Acquisition [Line Items]
Contingent consideration, liability			25,000,000.0				$ 25,000,000.0
Payment for Contingent Consideration Liability, Financing Activities							18,700,000
Common stock issued under "at the market" stock offering							1,000,000.0
Silvertip [Member] | Resource Contingent Consideration
Business Acquisition [Line Items]
Contingent consideration, liability			25,000,000.0				25,000,000.0
Payment for Contingent Consideration Liability, Financing Activities		$ 18,800,000
Common stock issued under "at the market" stock offering		$ 900,000
Kensington
Business Acquisition [Line Items]
Deferred Revenue Recognized			5,200,000	14,705,000		$ 15,000,000.0	20,210,000	14,705,000	25,000,000.0
Revenue liability			$ 9,914,000	$ 10,592,000	$ 25,021,000	$ 15,006,000	$ 9,914,000	$ 10,592,000	$ 15,010,000	$ 0

[1] Represents VAT that was paid to the Mexican government associated with Coeur Mexicana’s prior royalty agreement with a subsidiary of Franco-Nevada Corporation. The Company continues to pursue recovery from the Mexican government (including through ongoing litigation). See Note 17 -- Commitments and Contingencies for additional detail. The $4.5 million decrease in the nine months ended September 30, 2020 is attributable to a weaker Mexican Peso.