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Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [abstract] |  |
Capitalized interest | $ 36,750 | $ 31,680
Write-down of assets | 46,697 | $ 4,529
Equipment sold or written down to its estimated recoverable amounts | 29,800 |
Cost incurred for write-down of previously impaired assets | $ 16,700 |

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- Definition Cost incurred for write-down of previously impaired assets. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Equipment sold or written down. + References No definition available. + Details
Name: | ego_EquipmentSoldOrWrittenDown
Namespace Prefix: | ego_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Write down of assets. + References No definition available. + Details
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Namespace Prefix: | ego_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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- Definition The amount of interest costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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