Goodwill and Related Intangible Assets (Tables)

6 Months Ended

Jun. 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 six months ended June 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	16,931		—		—			16,931
Adjustments to prior year acquisitions	—		—		(832		)	(832		)
Foreign currency translation	—		197		520			717
Balance at June 30, 2017	$	198,216	$	54,081	$	68,551		$	320,848

Schedule Of Acquired Intangible Assets

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

	June 30, 2017				December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization		Estimated Life
Indefinite-lived intangible assets:
Trademarks	$	45,352	$	—	$	44,720	$	—	Indefinite
Finite-lived intangible assets:
Trademarks	5,842		2,749		5,808		2,427		5 to 15 Years
Unpatented technology	28,020		11,030		26,720		10,041		5 to 20 Years
Customer relationships	80,644		36,626		78,569		33,585		5 to 17 Years
Non-compete agreements	1,649		777		1,649		623		4 to 10 Years
Backlog	—		—		900		900		0.25 Years
	116,155		51,182		113,646		47,576
Total acquired intangible assets	$	161,507	$	51,182	$	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 six months ended June 30 (in thousands):

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2017		2016		2017		2016
Amortization expense	$	2,230	$	2,201	$	4,392	$	4,382

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	$4,363
2018	$8,286
2019	$7,615
2020	$7,103
2021	$6,501
2022	$6,090