Goodwill and Related Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

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, 2018 are as follows (in thousands):

	Residential Products		Industrial and Infrastructure Products			Renewable Energy & Conservation			Total
Balance at December 31, 2017	$	198,075	$	54,280		$	68,719		$	321,074
Acquired goodwill	—		—			2,838			2,838
Adjustments to prior year acquisitions	—		(38		)	—			(38		)
Foreign currency translation	—		(165		)	(388		)	(553		)
Balance at September 30, 2018	$	198,075	$	54,077		$	71,169		$	323,321

Schedule Of Acquired Intangible Assets

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

	September 30, 2018				December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization		Estimated  Life
Indefinite-lived intangible assets:
Trademarks	$	45,096	$	—	$	45,107	$	—	Indefinite
Finite-lived intangible assets:
Trademarks	6,148		3,397		5,876		3,062		3 to 15 Years
Unpatented technology	28,644		13,406		28,107		12,033		5 to 20 Years
Customer relationships	70,593		34,626		80,707		39,652		5 to 17 Years
Non-compete agreements	1,649		1,156		1,649		931		4 to 10 Years
	107,034		52,585		116,339		55,678
Total acquired intangible assets	$	152,130	$	52,585	$	161,446	$	55,678

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,
	2018		2017		2018		2017
Amortization expense	$	2,121	$	2,208	$	6,408	$	6,600

Schedule Of Amortization Expense

Amortization expense related to acquired intangible assets for the remainder of fiscal 2018 and the next five years thereafter is estimated as follows (in thousands):

	2018		2019		2020		2021		2022		2023
Amortization expense	$	1,960	$	7,841	$	7,329	$	6,726	$	6,315	$	5,776