GOODWILL AND INTANGIBLE ASSETS (Tables)

9 Months Ended

Sep. 29, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of components of amortized intangible assets

he components of amortized intangible assets at September 29, 2018 and December 30, 2017 were as follows:

	September 29, 2018
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	218,492	$	130,082	13 years
Patents & Proprietary Technology	23,846		4,440		14 years
Other	7,991		6,868		5 years
	$	250,329	$	141,390

	December 30, 2017
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	200,810	$	131,062	13 years
Patents & Proprietary Technology	6,693		3,999		11 years
Other	8,532		7,228		5 years
	$	216,035	$	142,289

Schedule of amortization expense for intangible assets

Amortization expense for intangible assets for the thirteen and thirty-nine weeks ended September 29, 2018 and September 30, 2017, respectively was as follows:

Thirteen Weeks Ended		Thirty-nine Weeks Ended
2018	2017	2018	2017
3,721	4,025	11,176	11,792

Schedule of future estimated amortization expense

Estimated annual amortization expense related to finite‑lived intangible assets is as follows:

	Estimated Amortization Expense
2018	$	15,264
2019	16,081
2020	14,969
2021	12,885
2022	10,740

Schedule of non-amortized intangible assets

The carrying values of trade names at September 29, 2018 and December 30, 2017 were as follows:

	September 29, 2018		December 30, 2017		Year Acquired
Newmark	$	11,111	$	11,111	2004
Valmont SM	8,283		9,973		2014
Webforge	9,105		9,432		2010
Convert Italia S.p.A	8,703		—		2018
Ingal EPS/Ingal Civil Products	7,424		7,690		2010
Shakespeare	4,000		4,000		2014
Other	21,128		22,647
	$	69,754	$	64,853

Schedule of carrying amount of goodwill

The carrying amount of goodwill by segment as of September 29, 2018 and December 30, 2017 was as follows:

	Engineered Support Structures Segment			Utility Support Structures Segment			Coatings Segment			Irrigation Segment			Other			Total
Gross balance at December 30, 2017	$	170,076		$	90,248		$	76,696		$	19,778		$	15,814		$	372,612
Accumulated impairment losses	(18,670		)	—			(16,222		)	—			—			(34,892		)
Balance at December 30, 2017	151,406			90,248			60,474			19,778			15,814			337,720
Acquisitions	40,919			41,432			—			5,503			—			87,854
Asset impairment	—			(14,355		)	—			—			—			(14,355		)
Divestiture of grinding media	—			—			—			—			(15,814		)	(15,814		)
Foreign currency translation	(4,797		)	(489		)	(380		)	(145		)	—			(5,811		)
Balance at September 29, 2018	$	187,528		$	116,836		$	60,094		$	25,136		$	—		$	389,594