Supplemental Guarantor Information Condensed Consolidated Balance Sheets (Details) (USD $)	Sep. 30, 2013	Jan. 29, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Cash Equivalents, at Carrying Value	$ 211,434,000		$ 125,440,000
Available-for-sale Securities, Debt Securities, Current	0		999,000
Accounts Receivable, Net, Current	74,417,000		62,438,000
Ore on Leach Pad, Current	39,880,000		22,991,000
Inventory, Net	123,537,000		170,670,000
Deferred Tax Assets, Gross, Current	2,713,000		2,458,000
Restricted Cash and Cash Equivalents, Current	2,015,000		396,000
Other Assets, Current	26,778,000		20,790,000
Assets, Current	480,774,000		406,182,000
Property, Plant and Equipment, Net	649,591,000		684,002,000
Mining Properties	2,365,999,000		1,991,809,000
Ore on Leach Pad, Non-Current Portion	31,966,000		21,356,000
Restricted Cash and Cash Equivalents, Noncurrent	24,914,000		24,970,000
Available-for-sale Securities, Equity Securities, Noncurrent			27,065,000
Accounts Receivable, Net, Noncurrent	37,191,000		48,767,000
Unamortized Debt Issuance Expense	11,351,000		3,713,000
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	1,104,000		955,000
Other Assets, Noncurrent	16,411,000		12,582,000
Assets	3,636,917,000		3,221,401,000
Accounts Payable, Current	63,610,000		57,482,000
Other Liabilities, Current	9,589,000		10,002,000
Accrued Income Taxes, Current	8,529,000		27,108,000
Employee-related Liabilities, Current	19,295,000		21,306,000
Interest Payable, Current	4,028,000		478,000
Debt, Current	3,868,000		55,983,000
Current Portion of Royalty Obligation	49,069,000		65,104,000
Accrued Reclamation Costs, Current	443,000		668,000
Deferred Tax Liabilities, Net, Current	121,000		121,000
Liabilities, Current	158,552,000		238,252,000
Long-term Debt and Capital Lease Obligations	306,372,000		3,460,000
Noncurrent Portion of Royalty Obligation	90,892,000		141,879,000
Mine Reclamation and Closing Liability, Noncurrent	55,872,000		34,670,000
Deferred Tax Liabilities, Net, Noncurrent	709,910,000		577,488,000
Other Liabilities, Noncurrent	23,371,000		27,372,000
Intercompany Payable Receivable	0		0
Liabilities, Noncurrent	1,186,417,000		784,869,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0		0
Common Stock, Value, Issued	1,006,000		903,000
Additional Paid in Capital, Common Stock	2,756,377,000		2,601,254,000
Retained Earnings (Accumulated Deficit)	(465,191,000)		(396,156,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(244,000)		(7,721,000)
Stockholders' Equity Attributable to Parent	2,291,948,000		2,198,280,000
Liabilities and Equity	3,636,917,000		3,221,401,000
Coeur Mining, Inc.
Condensed Financial Statements, Captions [Line Items]
Cash Equivalents, at Carrying Value	131,811,000		86,788,000
Available-for-sale Securities, Debt Securities, Current	0		999,000
Accounts Receivable, Net, Current	353,000		8,520,000
Ore on Leach Pad, Current	0		0
Inventory, Net	0		0
Deferred Tax Assets, Gross, Current	0		0
Restricted Cash and Cash Equivalents, Current	0		0
Other Assets, Current	6,682,000		3,395,000
Assets, Current	138,846,000		99,702,000
Property, Plant and Equipment, Net	6,085,000		4,183,000
Mining Properties	0		0
Ore on Leach Pad, Non-Current Portion	0		0
Restricted Cash and Cash Equivalents, Noncurrent	18,695,000		18,922,000
Available-for-sale Securities, Equity Securities, Noncurrent	17,616,000		27,065,000
Accounts Receivable, Net, Noncurrent	0		0
Unamortized Debt Issuance Expense	11,351,000		3,713,000
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	955,000		955,000
Other Assets, Noncurrent	53,194,000		39,120,000
Assets	2,098,889,000		1,747,094,000
Accounts Payable, Current	5,287,000		2,954,000
Other Liabilities, Current	2,335,000		1,418,000
Accrued Income Taxes, Current	34,000		257,000
Employee-related Liabilities, Current	4,934,000		7,477,000
Interest Payable, Current	4,012,000		463,000
Debt, Current	0		48,081,000
Current Portion of Royalty Obligation	0		0
Accrued Reclamation Costs, Current	0		0
Deferred Tax Liabilities, Net, Current	0		0
Liabilities, Current	16,602,000		60,650,000
Long-term Debt and Capital Lease Obligations	305,334,000		0
Noncurrent Portion of Royalty Obligation	0		0
Mine Reclamation and Closing Liability, Noncurrent	0		0
Deferred Tax Liabilities, Net, Noncurrent	113,130,000		115,425,000
Other Liabilities, Noncurrent	2,299,000		955,000
Intercompany Payable Receivable	(630,424,000)		(628,216,000)
Liabilities, Noncurrent	(209,661,000)		(511,836,000)
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	1,852,147,000		1,553,434,000
Common Stock, Value, Issued	1,006,000		903,000
Additional Paid in Capital, Common Stock	2,756,377,000		2,601,254,000
Retained Earnings (Accumulated Deficit)	(465,191,000)		(396,156,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(244,000)		(7,721,000)
Stockholders' Equity Attributable to Parent	2,291,948,000		2,198,280,000
Liabilities and Equity	2,098,889,000		1,747,094,000
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash Equivalents, at Carrying Value	399,000		400,000
Available-for-sale Securities, Debt Securities, Current	0		0
Accounts Receivable, Net, Current	16,517,000		7,643,000
Ore on Leach Pad, Current	39,880,000		22,991,000
Inventory, Net	31,511,000		45,906,000
Deferred Tax Assets, Gross, Current	0		0
Restricted Cash and Cash Equivalents, Current	0		0
Other Assets, Current	6,036,000		5,947,000
Assets, Current	94,343,000		82,887,000
Property, Plant and Equipment, Net	195,966,000		208,857,000
Mining Properties	323,060,000		301,506,000
Ore on Leach Pad, Non-Current Portion	31,966,000		21,356,000
Restricted Cash and Cash Equivalents, Noncurrent	60,000		60,000
Available-for-sale Securities, Equity Securities, Noncurrent	0		0
Accounts Receivable, Net, Noncurrent	0		0
Unamortized Debt Issuance Expense	0		0
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	0		0
Other Assets, Noncurrent	12,232,000		12,360,000
Assets	657,627,000		627,026,000
Accounts Payable, Current	18,755,000		17,211,000
Other Liabilities, Current	864,000		4,014,000
Accrued Income Taxes, Current	0		0
Employee-related Liabilities, Current	6,465,000		8,158,000
Interest Payable, Current	4,000		5,000
Debt, Current	1,784,000		3,013,000
Current Portion of Royalty Obligation	2,428,000		0
Accrued Reclamation Costs, Current	0		0
Deferred Tax Liabilities, Net, Current	0		0
Liabilities, Current	30,300,000		32,401,000
Long-term Debt and Capital Lease Obligations	283,000		1,675,000
Noncurrent Portion of Royalty Obligation	21,981,000		0
Mine Reclamation and Closing Liability, Noncurrent	43,993,000		23,149,000
Deferred Tax Liabilities, Net, Noncurrent	0		0
Other Liabilities, Noncurrent	329,000		8,086,000
Intercompany Payable Receivable	412,112,000		390,480,000
Liabilities, Noncurrent	478,698,000		423,390,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	0		0
Common Stock, Value, Issued	350,000		350,000
Additional Paid in Capital, Common Stock	107,734,000		107,734,000
Retained Earnings (Accumulated Deficit)	40,545,000		63,151,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	0		0
Stockholders' Equity Attributable to Parent	148,629,000		171,235,000
Liabilities and Equity	657,627,000		627,026,000
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Cash Equivalents, at Carrying Value	79,224,000		38,252,000
Available-for-sale Securities, Debt Securities, Current	0		0
Accounts Receivable, Net, Current	57,547,000		46,275,000
Ore on Leach Pad, Current	0		0
Inventory, Net	92,026,000		124,764,000
Deferred Tax Assets, Gross, Current	2,713,000		2,458,000
Restricted Cash and Cash Equivalents, Current	2,015,000		396,000
Other Assets, Current	14,060,000		11,448,000
Assets, Current	247,585,000		223,593,000
Property, Plant and Equipment, Net	447,540,000		470,962,000
Mining Properties	2,042,939,000		1,690,303,000
Ore on Leach Pad, Non-Current Portion	0		0
Restricted Cash and Cash Equivalents, Noncurrent	6,159,000		5,988,000
Available-for-sale Securities, Equity Securities, Noncurrent	0		0
Accounts Receivable, Net, Noncurrent	37,191,000		48,767,000
Unamortized Debt Issuance Expense	0		0
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	149,000		0
Other Assets, Noncurrent	320,407,000		318,330,000
Assets	4,680,769,000		4,043,805,000
Accounts Payable, Current	39,568,000		37,317,000
Other Liabilities, Current	6,390,000		4,570,000
Accrued Income Taxes, Current	8,495,000		26,851,000
Employee-related Liabilities, Current	7,896,000		5,671,000
Interest Payable, Current	1,050,000		1,002,000
Debt, Current	306,734,000		309,539,000
Current Portion of Royalty Obligation	46,641,000		65,104,000
Accrued Reclamation Costs, Current	947,000		1,445,000
Deferred Tax Liabilities, Net, Current	121,000		121,000
Liabilities, Current	417,842,000		451,620,000
Long-term Debt and Capital Lease Obligations	64,487,000		53,367,000
Noncurrent Portion of Royalty Obligation	68,911,000		141,879,000
Mine Reclamation and Closing Liability, Noncurrent	11,375,000		10,744,000
Deferred Tax Liabilities, Net, Noncurrent	596,780,000		462,063,000
Other Liabilities, Noncurrent	20,743,000		18,331,000
Intercompany Payable Receivable	218,312,000		237,736,000
Liabilities, Noncurrent	980,608,000		924,120,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	1,578,799,000		1,285,862,000
Common Stock, Value, Issued	122,826,000		22,760,000
Additional Paid in Capital, Common Stock	3,235,571,000		2,748,173,000
Retained Earnings (Accumulated Deficit)	(76,078,000)		(102,868,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax	0		0
Stockholders' Equity Attributable to Parent	3,282,319,000		2,668,065,000
Liabilities and Equity	4,680,769,000		4,043,805,000
Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash Equivalents, at Carrying Value	0		0
Available-for-sale Securities, Debt Securities, Current	0		0
Accounts Receivable, Net, Current	0		0
Ore on Leach Pad, Current	0		0
Inventory, Net	0		0
Deferred Tax Assets, Gross, Current	0		0
Restricted Cash and Cash Equivalents, Current	0		0
Other Assets, Current	0		0
Assets, Current	0		0
Property, Plant and Equipment, Net	0		0
Mining Properties	0		0
Ore on Leach Pad, Non-Current Portion	0		0
Restricted Cash and Cash Equivalents, Noncurrent	0		0
Available-for-sale Securities, Equity Securities, Noncurrent	0		0
Accounts Receivable, Net, Noncurrent	0		0
Unamortized Debt Issuance Expense	0		0
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	0		0
Other Assets, Noncurrent	(369,422,000)		(357,228,000)
Assets	(3,800,368,000)		(3,196,524,000)
Accounts Payable, Current	0		0
Other Liabilities, Current	0		0
Accrued Income Taxes, Current	0		0
Employee-related Liabilities, Current	0		0
Interest Payable, Current	(1,038,000)		(992,000)
Debt, Current	(304,650,000)		(304,650,000)
Current Portion of Royalty Obligation	0		0
Accrued Reclamation Costs, Current	(504,000)		(777,000)
Deferred Tax Liabilities, Net, Current	0		0
Liabilities, Current	(306,192,000)		(306,419,000)
Long-term Debt and Capital Lease Obligations	(63,732,000)		(51,582,000)
Noncurrent Portion of Royalty Obligation	0		0
Mine Reclamation and Closing Liability, Noncurrent	504,000		777,000
Deferred Tax Liabilities, Net, Noncurrent	0		0
Other Liabilities, Noncurrent	0		0
Intercompany Payable Receivable	0		0
Liabilities, Noncurrent	(63,228,000)		(50,805,000)
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	(3,430,946,000)		(2,839,296,000)
Common Stock, Value, Issued	(123,176,000)		(23,110,000)
Additional Paid in Capital, Common Stock	(3,343,305,000)		(2,855,907,000)
Retained Earnings (Accumulated Deficit)	35,533,000		39,717,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	0		0
Stockholders' Equity Attributable to Parent	(3,430,948,000)		(2,839,300,000)
Liabilities and Equity	(3,800,368,000)		(3,196,524,000)
Senior Notes due Two Thousand Twenty One [Member]
Condensed Financial Statements, Captions [Line Items]
Debt Instrument, Face Amount		300,000,000
Debt, Current	0		0
Long-term Debt and Capital Lease Obligations	$ 300,000,000		$ 0
Debt Instrument, Interest Rate, Stated Percentage		7.875%