v2.4.1.9

Related Party Transactions - Additional Information (Detail) (USD $) | 0 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 14, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Feb. 29, 2012
Related Party Transactions [Abstract] |  |  |  |  |
Purchase of finished goods inventory |  | $ 13,100,000 us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty | $ 12,000,000 us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty | $ 8,100,000 us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty |
Offer and sale of common stock |  |  |  |  | 4,086,750 wire_NumberOfSharesRegisteredForOfferAndSaleUnderAgreement
Repurchase of common stock (shares) | 2,774,250 us-gaap_TreasuryStockSharesAcquired | 0 us-gaap_TreasuryStockSharesAcquired | 0 us-gaap_TreasuryStockSharesAcquired |  |
Repurchase price of common stock | $ 66,638,000 us-gaap_PaymentsForRepurchaseOfCommonStock | $ 0 us-gaap_PaymentsForRepurchaseOfCommonStock | $ 0 us-gaap_PaymentsForRepurchaseOfCommonStock | $ 66,638,000 us-gaap_PaymentsForRepurchaseOfCommonStock |
Repurchase of common stock (in usd per share) | $ 24.02 us-gaap_TreasuryStockAcquiredAverageCostPerShare |  |  |  |

X
- Definition The cash outflow to reacquire common stock during the period. + 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 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + 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 SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares registered for offer and sale under agreement. + References No definition available. + Details
Name: | wire_NumberOfSharesRegisteredForOfferAndSaleUnderAgreement
Namespace Prefix: | wire_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant