Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ (1,155,884)us-gaap_NetIncomeLoss	$ (650,563)us-gaap_NetIncomeLoss	$ 48,677us-gaap_NetIncomeLoss
Adjustments:
Amortization	162,436cde_DepreciationAndDepletion	229,564cde_DepreciationAndDepletion	216,032cde_DepreciationAndDepletion
Accretion	16,246us-gaap_AccretionExpense	20,810us-gaap_AccretionExpense	24,550us-gaap_AccretionExpense
Deferred income taxes	(470,897)us-gaap_DeferredIncomeTaxExpenseBenefit	(177,178)us-gaap_DeferredIncomeTaxExpenseBenefit	16,163us-gaap_DeferredIncomeTaxExpenseBenefit
Loss on termination of revolving credit facility	(3,035)us-gaap_GainLossOnContractTermination	0us-gaap_GainLossOnContractTermination	(1,036)us-gaap_GainLossOnContractTermination
Fair value adjustments, net	(3,721)cde_FairValueAdjustmentsNet	(80,399)cde_FairValueAdjustmentsNet	18,421cde_FairValueAdjustmentsNet
Litigation settlement	0cde_ProceedsFromSettlement	22,046cde_ProceedsFromSettlement	0cde_ProceedsFromSettlement
Stock-based compensation	9,288us-gaap_ShareBasedCompensation	4,812us-gaap_ShareBasedCompensation	8,010us-gaap_ShareBasedCompensation
(Gain) loss on sale of assets	(35)us-gaap_GainLossOnDispositionOfAssets	(9,801)us-gaap_GainLossOnDispositionOfAssets	1,101us-gaap_GainLossOnDispositionOfAssets
Impairment of marketable securities	6,593	18,308	605
Write-downs	1,472,721us-gaap_AssetImpairmentCharges	772,993us-gaap_AssetImpairmentCharges	5,825us-gaap_AssetImpairmentCharges
Other	(359)us-gaap_OtherNoncashIncomeExpense	(744)us-gaap_OtherNoncashIncomeExpense	(1,707)us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities:
Receivables	(20,609)	663	9,756
Prepaid expenses and other current assets	5,635	(15,165)	2,489
Inventory and ore on leach pads	12,971us-gaap_IncreaseDecreaseInInventories	4,031us-gaap_IncreaseDecreaseInInventories	(48,305)us-gaap_IncreaseDecreaseInInventories
Accounts payable and accrued liabilities	15,507	(25,910)	(31,019)
CASH PROVIDED BY OPERATING ACTIVITIES	52,927	113,467	271,634
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(64,244)	(100,813)	(115,641)
Acquisitions	(21,329)us-gaap_PaymentsToAcquireMineralRights	(116,898)us-gaap_PaymentsToAcquireMineralRights	(29,297)us-gaap_PaymentsToAcquireMineralRights
Purchase of short term investments and marketable securities	(50,513)us-gaap_PaymentsToAcquireInvestments	(8,052)us-gaap_PaymentsToAcquireInvestments	(12,959)us-gaap_PaymentsToAcquireInvestments
Sales and maturities of short term investments	54,344	34,796	21,695
Other	8	4,478	3,087
CASH USED IN INVESTING ACTIVITIES	(81,734)	(186,489)	(133,115)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of notes and bank borrowings	167,784	300,000	0
Payments on long-term debt, capital leases, and associated costs	(25,902)	(60,628)	(97,170)
Gold production royalty payments	(48,395)cde_Cashpaymentsongoldproductionroyalty	(57,034)cde_Cashpaymentsongoldproductionroyalty	(74,734)cde_Cashpaymentsongoldproductionroyalty
Share repurchases	0	(27,552)	(19,971)
Other	(509)	(514)	3,784
CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES:	92,978	154,272	(188,091)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	64,171	81,250	(49,572)
Cash and cash equivalents at beginning of period	206,690	125,440	175,012
Cash and cash equivalents at end of period	$ 270,861	$ 206,690	$ 125,440

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Balance Type:	debit
Period Type:	duration

- Definition

The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

+ Details

Name:	us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow associated with security instruments that either represent a creditor or an ownership relationship with the holder of the investment security with a maturity of beyond one year or normal operating cycle, if longer. Includes repayments of (a) debt, (b) capital lease obligations, (c) mandatory redeemable capital securities, and (d) any combination of (a), (b), or (c).

+ References

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration