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Goodwill and Related Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31 were as follows (in thousands):

	Residential Products				Industrial and Infrastructure Products				Total
Balance at December 31, 2012	$	193,043			$	166,820			$	359,863
Acquired goodwill	2,467				—				2,467
Adjustments to prior year acquisitions	10				242				252
Impairment	—				(21,040		)		(21,040		)
Foreign currency translation	$	—			$	(368	)		(368		)
Balance at December 31, 2013	$	195,520			$	145,654			$	341,174
Impairment	(14,235		)		(90,330		)		(104,565		)
Foreign currency translation	—				(565		)		(565		)
Balance at December 31, 2014	$	181,285			$	54,759			$	236,044

Schedule of Goodwill Impairment Tests

The following table summarizes the WACC calculation ranges used during the annual goodwill impairment tests performed during 2014 and 2013:

Date of Impairment Test		WACC
October 31, 2014		12.9% to 13.6%
October 31, 2013		11.1% to 12.7%

Schedule of Acquired Intangible Assets

Acquired intangible assets consist of the following (in thousands):

	December 31, 2014								December 31, 2013
	Gross Carrying Amount				Accumulated Amortization				Gross Carrying Amount				Accumulated Amortization				Estimated Useful Life
Indefinite-lived intangible assets:
Trademarks	$	42,720			$	—			$	45,724			$	—			Indefinite
Finite-lived intangible assets:
Trademarks	3,886				1,827				3,989				1,420				2 to 15 Years
Unpatented technology	24,527				8,768				24,690				6,980				5 to 20 Years
Customer relationships	52,974				31,554				54,171				28,926				5 to 16 Years
Non-compete agreements	1,807				1,550				1,937				1,408				4 to 10 Years
Backlog	1,330				1,330				1,330				1,330				1 to 2 Years
	84,524				45,029				86,117				40,064
Total acquired intangible assets	$	127,244			$	45,029			$	131,841			$	40,064

Schedule of Acquired Intangible Asset Amortization Expense

The following table summarizes the impairment charges for the years ended December 31 (in thousands):

	2014				2013				2012
Residential Products	$	1,200			$	1,454			$	300
Industrial and Infrastructure Products	2,205				1,000				—
Impairment charges	$	3,405			$	2,454			$	300

Schedule of Intangible Assets Amortization Expense

The following table summarizes amortization expense for the years ended December 31 (in thousands):

	2014				2013				2012
Amortization expense	$	5,720			$	6,572			$	6,671

Schedule of Amortization Expense

Amortization expense related to acquired intangible assets for the next five years ended December 31 is estimated as follows (in thousands):

2015	$	5,488
2016	$	5,154
2017	$	4,793
2018	$	4,231
2019	$	3,561

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