Goodwill and Related Intangible Assets (Tables)

6 Months Ended

Jun. 30, 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 six months ended June 30, 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	49,001		—		—		49,001
Adjustments to prior year acquisitions	579		—		—		579
Foreign currency translation	(281)		—		(264)		(545)
Balance at June 30, 2020	$	126,901	$	198,075	$	53,764	$	378,740

Schedule Of Acquired Intangible Assets

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

	June 30, 2020				December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Indefinite-lived intangible assets:
Trademarks	$	51,295	$	—	$	45,770	$	—
Finite-lived intangible assets:
Trademarks	6,753		4,328		6,139		4,105
Unpatented technology	35,383		17,031		29,544		15,807
Customer relationships	80,976		42,876		71,195		40,294
Non-compete agreements	1,949		1,640		1,649		1,499
Backlog	300		300		—		—
	125,361		66,175		108,527		61,705
Total acquired intangible assets	$	176,656	$	66,175	$	154,297	$	61,705

Schedule of Acquired Intangible Asset Amortization Expense

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

	Three Months Ended    June 30,				Six Months Ended    June 30,
	2020		2019		2020		2019
Amortization expense	$	2,412	$	1,797	$	4,490	$	3,594

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	$	3,860	$	7,633	$	7,154	$	6,617	$	6,363	$	6,203