Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill for the years ended December 31, 2013 and December 31, 2012 are as follows:



	U.S. Residential Products		U.S. Commercial Products		European Roll Coated Aluminum		European Engineered Products		Consolidated
Balance at December 30, 2011	$	71,987	$	9,067	$	103,292	$	12,340	$	196,686
Acquisition of Cleveland Tubing, Inc.	256		—		—		—		256
Foreign currency translation	—		—		1,873		560		2,433
Balance at December 31, 2012	72,243		9,067		105,165		12,900		199,375
Adjustment to Cleveland Tubing, Inc.	48		—		—		—		48
Foreign currency translation	—		—		4,384		246		4,630
Balance at December 31, 2013	$	72,291	$	9,067	$	109,549	$	13,146	$	204,053

Intangible Assets

Intangible assets consisted of the following:



	As of December 31, 2013							As of December 31, 2012
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Intangible assets subject to amortization:
Customer relationships	$	215,922	$	(175,291	)	$	40,631	$	212,532	$	(157,943	)	$	54,589
Patents	5,993		(5,020		)	973		5,800		(4,425		)	1,375
	221,915		(180,311		)	41,604		218,332		(162,368		)	55,964
Intangible assets not subject to amortization:
Trade names	6,100		—			6,100		6,100		—			6,100
Total intangible assets	$	228,015	$	(180,311	)	$	47,704	$	224,432	$	(162,368	)	$	62,064

Future Amortization Expense

The aggregate amortization expense for intangible assets for 2013, 2012, and 2011 was $15.2 million, $16.1 million, and $18.1 million, respectively. The average useful lives of the Company's customer relationships and patents are 12 years and 10 years, respectively. Based on the carrying value of identified intangible assets recorded at December 31, 2013, and assuming no subsequent impairment of the underlying assets, the aggregate annual amortization expense for the next 5 years is expected to be as follows:



	Amortization of Intangible Assets
2014	$	13,482
2015	11,900
2016	10,578
2017	4,427
2018	478