Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in carrying amounts of goodwill

The changes in carrying amounts of goodwill during the nine months ended September 30, 2015 were as follows:

	Metals Segment			Plastics Segment		Total
Balance as of January 1, 2015:
Goodwill	$	116,377		$	12,973	$	129,350
Accumulated impairment losses	(116,377		)	—		(116,377		)
Balance as of January 1, 2015	—			12,973		12,973
Balance as of September 30, 2015:
Goodwill	116,377			12,973		129,350
Accumulated impairment losses	(116,377		)	—		(116,377		)
Balance as of September 30, 2015	$	—		$	12,973	$	12,973

Summary of the components of intangible assets

The following table summarizes the components of intangible assets, all of which relate to the Metals reporting unit:

	September 30, 2015				December 31, 2014
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Customer relationships	$	114,033	$	71,740	$	116,268	$	64,922
Trade name	7,624		3,125		7,864		2,655
Total	$	121,657	$	74,865	$	124,132	$	67,577

Finite-lived Intangible Assets Amortization Expense [Table Text Block]

For the three and nine months ended September 30, 2015 and 2014, the Company recorded the following aggregate amortization expense associated with intangibles:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Amortization expense	$	2,655	$	2,921	$	8,001	$	8,758

Summary of the estimated annual amortization expense

The following is a summary of the estimated annual amortization expense for 2015 and each of the next 4 years:

2015	$	10,579
2016	$	10,579
2017	$	8,556
2018	$	4,441
2019	$	4,441