Goodwill and Related Intangible Assets (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31, 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
Foreign currency translation	—		(163		)	861		698
Balance at March 31, 2018	$	198,075	$	54,117		$	69,580	$	321,772

Schedule Of Acquired Intangible Assets

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

	March 31, 2018				December 31, 2017
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization		Estimated  Life
Indefinite-lived intangible assets:
Trademarks	$	45,159	$	—	$	45,107	$	—	Indefinite
Finite-lived intangible assets:
Trademarks	5,848		3,166		5,876		3,062		5 to 15 Years
Unpatented technology	28,107		12,490		28,107		12,033		5 to 20 Years
Customer relationships	81,174		41,215		80,707		39,652		5 to 17 Years
Non-compete agreements	1,649		1,007		1,649		931		4 to 10 Years
	116,778		57,878		116,339		55,678
Total acquired intangible assets	$	161,937	$	57,878	$	161,446	$	55,678

Schedule of Acquired Intangible Asset Amortization Expense

The following table summarizes the acquired intangible asset amortization expense for the three months ended March 31 (in thousands):

	2018		2017
Amortization expense	$	2,139	$	2,162

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	$	6,087	$	7,654	$	7,142	$	6,539	$	6,127	$	5,588