Goodwill and Related Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

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, 2020 are as follows (in thousands):

	Renewable Energy & Conservation		Residential Products		Industrial and Infrastructure Products			Total
Balance at December 31, 2019	$	77,602	$	198,075	$	54,028		$	329,705
Acquired goodwill	52,659		—		—			52,659
Adjustments to prior year acquisitions	75		—		—			75
Foreign currency translation	75		—		(469		)	(394		)
Balance at March 31, 2020	$	130,411	$	198,075	$	53,559		$	382,045

Schedule Of Acquired Intangible Assets

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

	March 31, 2020				December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization		Weighted-Average Amortization Period
Indefinite-lived intangible assets:
Trademarks	$	45,770	$	—	$	45,770	$	—	Indefinite
Finite-lived intangible assets:
Trademarks	8,693		4,239		6,139		4,105		3 to 15 Years
Unpatented technology	34,289		16,354		29,544		15,807		5 to 20 Years
Customer relationships	80,777		41,490		71,195		40,294		5 to 17 Years
Non-compete agreements	1,649		1,567		1,649		1,499		4 to 10 Years
	125,408		63,650		108,527		61,705
Total acquired intangible assets	$	171,178	$	63,650	$	154,297	$	61,705

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):

	Three Months Ended   March 31,
	2020		2019
Amortization expense	$	2,078	$	1,797

Schedule Of Amortization Expense

Amortization expense related to acquired intangible assets for the remainder of fiscal 2020 and the next five years thereafter is estimated as follows (in thousands):

	2020		2021		2022		2023		2024		2025
Amortization expense	$	5,311	$	6,937	$	6,459	$	5,921	$	5,666	$	5,566