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	1us-gaap_NumberOfReportableSegments
Number of manufacturers' representatives	30wire_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	$ 24.9us-gaap_ShippingHandlingAndTransportationCosts	$ 21.7us-gaap_ShippingHandlingAndTransportationCosts	$ 20.1us-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

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
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

Name:	wire_MaximumPercentageOfAluminumUseInRelationToCostOfGoodsSold
Namespace Prefix:	wire_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of manufactures' representatives.

+ References

No definition available.

+ Details

Name:	wire_NumberOfManufacturersRepresentatives
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

Name:	wire_PercentageOfCopperUseInRelationToCostOfGoodsSold
Namespace Prefix:	wire_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	wire_SignificantAccountingPoliciesLineItems
Namespace Prefix:	wire_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: