Goodwill and Related Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule Of Changes In Carrying Amount Of Goodwill

The changes in the carrying amount of goodwill for the nine months ended September 30, 2017 are as follows (in thousands):

	Residential Products		Industrial and Infrastructure Products		Renewable Energy & Conservation			Total
Balance at December 31, 2016	$	181,285	$	53,884	$	68,863		$	304,032
Acquired goodwill	16,863		—		—			16,863
Adjustments to prior year acquisitions	—		—		(832		)	(832		)
Foreign currency translation	—		432		598			1,030
Balance at September 30, 2017	$	198,148	$	54,316	$	68,629		$	321,093

Schedule Of Acquired Intangible Assets

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

	September 30, 2017				December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization		Estimated Life
Indefinite-lived intangible assets:
Trademarks	$	45,153	$	—	$	44,720	$	—	Indefinite
Finite-lived intangible assets:
Trademarks	5,882		2,921		5,808		2,427		5 to 15 Years
Unpatented technology	28,020		11,523		26,720		10,041		5 to 20 Years
Customer relationships	80,719		38,182		78,569		33,585		5 to 17 Years
Non-compete agreements	1,649		854		1,649		623		4 to 10 Years
Backlog	—		—		900		900		0.25 Years
	116,270		53,480		113,646		47,576
Total acquired intangible assets	$	161,423	$	53,480	$	158,366	$	47,576

Schedule of Acquired Intangible Asset Amortization Expense

The following table summarizes the acquired intangible asset amortization expense for the three and nine months ended September 30 (in thousands):

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2017		2016		2017		2016
Amortization expense	$	2,208	$	2,159	$	6,600	$	6,541

Schedule Of Amortization Expense

Amortization expense related to acquired intangible assets for the remainder of fiscal 2017 and the next five years thereafter is estimated as follows (in thousands):

2017	$2,157
2018	$8,288
2019	$7,617
2020	$7,105
2021	$6,503
2022	$6,092