v2.4.1.9

Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 representative segment | Dec. 31, 2013 | Dec. 31, 2012
Significant Accounting Policies [Line Items] |  |  |
Number of business segments | 1 us-gaap_NumberOfReportableSegments |  |
Number of manufacturers' representatives | 30 wire_NumberOfManufacturersRepresentatives |  |
Percentage of copper use in relation to cost of goods sold | 74.70%wire_PercentageOfCopperUseInRelationToCostOfGoodsSold | 77.60%wire_PercentageOfCopperUseInRelationToCostOfGoodsSold | 79.00%wire_PercentageOfCopperUseInRelationToCostOfGoodsSold
Percentage of aluminum use in relation to cost of goods sold | 4.10%wire_MaximumPercentageOfAluminumUseInRelationToCostOfGoodsSold |  |
Shipping and handling cost | $ 24.9 us-gaap_ShippingHandlingAndTransportationCosts | $ 21.7 us-gaap_ShippingHandlingAndTransportationCosts | $ 20.1 us-gaap_ShippingHandlingAndTransportationCosts
Buildings and Improvements | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment | 15 years |  |
Buildings and Improvements | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment | 39 years |  |
Machinery and Equipment | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment | 3 years |  |
Machinery and Equipment | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment | 15 years |  |
Furniture and Fixtures | Minimum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment | 3 years |  |
Furniture and Fixtures | Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Property plant and equipment | 15 years |  |

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18726-107790 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6408196&loc=d3e61069-111654 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Handling Costs -URI http://asc.fasb.org/extlink&oid=6514758 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21915142&loc=d3e60635-111653 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6408413&loc=d3e221937-122793 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Shipping Costs -URI http://asc.fasb.org/extlink&oid=6525344 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum percentage of aluminum use in relation to cost of goods sold. + References No definition available. + Details
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Namespace Prefix: | wire_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of manufactures' representatives. + References No definition available. + Details
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Namespace Prefix: | wire_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of copper use in relation to cost of goods sold. + References No definition available. + Details
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Namespace Prefix: | wire_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: | wire_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |