Long-Term Debt and Capital Lease Obligation (Details Textual) (USD $)	3 Months Ended		6 Months Ended							3 Months Ended		6 Months Ended							3 Months Ended		6 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Jun. 01, 2011	Dec. 31, 2010	Jul. 06, 2010	Jul. 15, 2009	Jun. 30, 2011 Coeur Mexicana [Member]	Jun. 30, 2011 3.25% Convertible Senior Notes due March 2028 [Member]	Jun. 30, 2010 3.25% Convertible Senior Notes due March 2028 [Member]	Jun. 30, 2011 3.25% Convertible Senior Notes due March 2028 [Member]	Jun. 30, 2010 3.25% Convertible Senior Notes due March 2028 [Member]	Dec. 31, 2010 3.25% Convertible Senior Notes due March 2028 [Member]	Jun. 30, 2011 1.25% Convertible Senior Notes due January 2024 [Member]	Jan. 21, 2011 1.25% Convertible Senior Notes due January 2024 [Member]	Jan. 18, 2011 1.25% Convertible Senior Notes due January 2024 [Member]	Dec. 31, 2010 1.25% Convertible Senior Notes due January 2024 [Member]	Jun. 30, 2011 Senior Term Notes due December 31, 2012 [Member]	Jun. 30, 2010 Senior Term Notes due December 31, 2012 [Member]	Jun. 30, 2011 Senior Term Notes due December 31, 2012 [Member]	Jun. 30, 2010 Senior Term Notes due December 31, 2012 [Member]	Dec. 31, 2010 Senior Term Notes due December 31, 2012 [Member]	Jun. 30, 2011 Kensington Term Facility [Member]	Dec. 31, 2010 Kensington Term Facility [Member]
Long term debt and capital lease obligation (Textuals) [Abstract]
Interest rate on notes										3.25%		3.25%			1.25%
Debt outstanding balance										$ 48,700,000		$ 48,700,000			$ 0				$ 22,500,000		$ 22,500,000
Long-term debt and capital leases	135,322,000		135,322,000			130,067,000				44,357,000		44,357,000		43,220,000	0			0	7,500,000		7,500,000		15,000,000	68,124,000	48,322,000
Carrying value of the equity component										10,900,000		10,900,000		10,900,000
Interest expense										400,000	400,000	900,000	1,600,000						400,000	1,500,000	900,000	2,500,000
Accretion expense	5,770,000	4,637,000	11,037,000	9,629,000						300,000	600,000	600,000	1,900,000
Debt discount remaining										4,300,000		4,300,000
Effective interest rate on the notes										12.40%		12.40%
Notes repurchased																914,000	945,000
Notes repurchased																			3,800,000	8,300,000	7,500,000	16,600,000
Loss on debt extinguishment	(389,000)	(4,050,000)	(856,000)	(11,908,000)															400,000	500,000	900,000	1,600,000
Percentage of payment by cash																				50.00%		50.00%
Percentage of payment by stock																				50.00%		50.00%
Common stock issued in exchange of notes																				384,410		1,060,413
Borrowing under term facility																								89,800,000
Protection of gold under gold hedging program																								187,500
Gold under collars protection																								220,000
Weighted average put feature of each collar																								943.09
Weighted average call feature of each collar																								1,858.41
Outstanding amount of capital leases									24,500,000
Additional Long term debt and capital lease obligation (Textual) [Abstract]
Date of first installment			March 31,2010
Capital leases for equipment and facilities leases	9,600,000		9,600,000
Short-term Financing Agreement							2,400,000
Interest to finance insurance premium							2.90%
Final payment of monthly installments					200,000
Outstanding Amount	0		0			1,100,000
Equipment financing agreement bearing interest								8.26%
Final payment made on loan, monthly installments								24 months
Equipment Financing Agreement Outstanding	400,000		400,000			1,200,000
Accretion expense on royalty obligation discount	5,800,000	4,600,000	11,000,000	9,600,000
Remaining Minimum Obligation Under Royalty Agreements	76,500,000		76,500,000			80,300,000
Expensed Interest	9,268,000	5,646,000	18,573,000	11,451,000
Capitalized interest	$ (238,000)	$ (4,225,000)	$ (415,000)	$ (8,375,000,000)