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Stock-Based Compensation (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Beginning balance | 415,570 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 370,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 321,607 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Granted | 415,172 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod | 190,452 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod | 151,102 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
Exercised |  | (13,027)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | (40,173)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Canceled/forfeited | (232,396)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod | (131,855)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod | (62,536)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Ending balance | 598,346 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 415,570 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber | 370,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |  |
Weighted Average Exercise Price, Beginning Balance | $ 27.36 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 30.20 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 24.60 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Weighted Average Grant Date Fair Value, Granted | $ 9.45 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 20.41 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 26.97 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Weighted Average Grant Date Fair Value, Exercised |  | $ 10.77 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionExercisesInPeriodWeightedAverageGrantDateFairValue | $ 11.84 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionExercisesInPeriodWeightedAverageGrantDateFairValue
Weighted Average Grant Date Fair Value, Canceled/forfeited | $ 23.94 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionCancelledForfeitedInPeriodWeightedAverageGrantDateFairValue | $ 29.30 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionCancelledForfeitedInPeriodWeightedAverageGrantDateFairValue | $ 29.22 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionCancelledForfeitedInPeriodWeightedAverageGrantDateFairValue
Weighted Average Exercise Price, Ending Balance | $ 16.26 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 27.36 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice | $ 30.20 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] |  |  |
Beginning balance, SARs | 50,209 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingNumber | 68,865 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingNumber | 107,639 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingNumber
Granted, SARs | 0 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsGrantsInPeriod | 0 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsGrantsInPeriod | 0 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsGrantsInPeriod
Exercised, SARs |  | (6,617)cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsExercisesInPeriod | (34,385)cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsExercisesInPeriod
Canceled/forfeited, SARs | (3,637)cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsForfeituresInPeriod | (12,039)cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsForfeituresInPeriod | (4,389)cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsForfeituresInPeriod
Ending balance, SARs | 46,572 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingNumber | 50,209 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingNumber | 68,865 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingNumber
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |
Weighted Average Exercise Price, Beginning Balance | $ 14.15 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingWeightedAverageExercisePrice | $ 13.83 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingWeightedAverageExercisePrice | $ 13.46 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingWeightedAverageExercisePrice
Weighted Average Grant Date Fair Value, Granted | $ 0 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 0 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 0.00 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsGrantsInPeriodWeightedAverageGrantDateFairValue
Period Weighted Average Grant Date Fair Value, Granted |  | $ 13.14 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsExercisesInPeriodWeightedAverageGrantDateFairValue | $ 12.73 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsExercisesInPeriodWeightedAverageGrantDateFairValue
Weighted Average Grant Date Fair Value, Canceled/forfeited | $ 15.40 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsCancelledForfeitedInPeriodWeightedAverageGrantDateFairValue | $ 15.40 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsCancelledForfeitedInPeriodWeightedAverageGrantDateFairValue | $ 15.40 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsCancelledForfeitedInPeriodWeightedAverageGrantDateFairValue
Weighted Average Exercise Price, Ending Balance | $ 14.06 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingWeightedAverageExercisePrice | $ 14.15 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingWeightedAverageExercisePrice | $ 13.83 cde_ShareBasedCompensationArrangementByShareBasedPaymentAwardSarsOutstandingWeightedAverageExercisePrice

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- Definition Share based compensation arrangement by share based payment award SAR's cancelled forfeited in period weighted average grant date fair value. + References No definition available. + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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