Acquired Intangible Assets (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended
		May 31, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Acquired Indefinite-lived Intangible Assets [Line Items]
Total acquired intangible assets			$ 99,197		$ 99,197		$ 57,128
Less accumulated amortization	[1]		(31,667)		(31,667)		(29,040)
Net acquired intangible assets			67,530		67,530		28,088
Amortization of acquired intangible assets [Abstract]
Amortization expense			1,500	$ 1,200	2,700	$ 2,500
Estimated amortization expense, remainder of 2016			4,300		4,300
Estimated amortization expense in year 2017			8,100		8,100
Estimated amortization expense in year 2018			7,600		7,600
Estimated amortization expense in year 2019			6,400		6,400
Estimated amortization expense in years 2020 through 2031			35,900		35,900
Customer Relationships [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Total acquired intangible assets			87,506		87,506		48,475
Trademarks and Trade Names [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Total acquired intangible assets			6,800		6,800		6,800
Intangible assets acquired [Abstract]
Amount of acquired indefinite-lived intangible assets			5,200		5,200
Non-compete Agreements [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Total acquired intangible assets			3,208		3,208		970
Patents [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Total acquired intangible assets			723		723		723
Supply Agreements [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Total acquired intangible assets			800		800		0
Leaseholds [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Total acquired intangible assets			$ 160		$ 160		$ 160
General Cable Corporation [Member]
Intangible assets acquired [Abstract]
Intangible assets acquired in business acquisition		$ 42,400
General Cable Corporation [Member] | Customer Relationships [Member]
Intangible assets acquired [Abstract]
Intangible assets acquired in business acquisition		$ 39,400
Estimated useful life of intangible assets		15 years
General Cable Corporation [Member] | Non-compete Agreements [Member]
Intangible assets acquired [Abstract]
Intangible assets acquired in business acquisition		$ 2,200
Estimated useful life of intangible assets		5 years
General Cable Corporation [Member] | Supply Agreements [Member]
Intangible assets acquired [Abstract]
Intangible assets acquired in business acquisition		$ 800
Estimated useful life of intangible assets		1 year

[1] Applies to all intangible assets, except for trademarks and trade names totaling $5.2 million, which have indefinite useful lives and, as such, are not being amortized.