GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 28, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of components of amortized intangible assets

The components of amortized intangible assets at December 28, 2019 and December 29, 2018 were as follows:

	December 28, 2019
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	237,626	$	149,720	13 years
Patents & Proprietary Technology	24,068		6,358		14 years
Other	8,054		7,035		5 years
	$	269,748	$	163,113

	December 29, 2018
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	219,508	$	132,180	13 years
Patents & Proprietary Technology	23,662		4,837		14 years
Other	7,971		6,891		5 years
	$	251,141	$	143,908

Schedule of future estimated amortization expense

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

	Estimated Amortization Expense
2020	$	17,343
2021	15,298
2022	13,120
2023	11,345
2024	9,434

Schedule of non-amortized intangible assets

The carrying values of trade names at December 28, 2019 and December 29, 2018 were as follows:

	December 28, 2019		December 29, 2018		Year Acquired
Newmark	$	11,111	$	11,111	2004
Webforge	9,143		8,872		2010
Valmont SM	7,966		8,155		2014
Ingal EPS/Ingal Civil Products	7,454		7,233		2010
Shakespeare	4,000		4,000		2014
Walpar	3,500		4,300		2018
Convert	8,378		8,580		2018
Other	17,555		16,472
	$	69,107	$	68,723

Schedule of carrying amount of goodwill

The carrying amount of goodwill by segment as of December 28, 2019 and December 29, 2018 was as follows:

	Engineered Support Structures Segment			Utility Support Structures Segment			Coatings Segment			Irrigation Segment			Total
Gross balance at December 29, 2018	$	204,735		$	123,618		$	80,937		$	25,164		$	434,454
Accumulated impairment losses	(18,670		)	(14,355		)	(16,222		)	—			(49,247		)
Balance at December 29, 2018	186,065			109,263			64,715			25,164			$	385,207
Acquisitions	21,870			7,889			12,374			—			42,133
Foreign currency translation	2,029			(913		)	436			(28		)	1,524
Balance at December 28, 2019	$	209,964		$	116,239		$	77,525		$	25,136		$	428,864

(8) GOODWILL AND INTANGIBLE ASSETS (Continued)

	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	42,216			34,280			5,120			5,503			—			87,119
Impairment	—			(14,355		)	—			—			—			(14,355		)
Divestiture of grinding media	—			—			—			—			(15,814		)	(15,814		)
Foreign currency translation	(7,557		)	(910		)	(879		)	(117		)	—			(9,463		)
Balance at December 29, 2018	$	186,065		$	109,263		$	64,715		$	25,164		$	—		$	385,207