GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 26, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Components of Amortized Intangible Assets

The components of amortized intangible assets at December 26, 2020 and December 28, 2019 were as follows:

	December 26, 2020
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	237,232	$	155,760	13 years
Patents & Proprietary Technology	26,208		8,301		14 years
Other	7,602		6,786		4 years
	$	271,042	$	170,847

	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

Schedule of Future Estimated Amortization Expense

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

	Estimated Amortization Expense
2021	$	15,435
2022	13,270
2023	11,571
2024	9,656
2025	8,222

Schedule of Non-Amortized Intangible Assets

The carrying values of trade names at December 26, 2020 and December 28, 2019 were as follows:

	December 26, 2020		December 28, 2019		Year Acquired
Newmark	$	11,111	$	11,111	2004
Webforge	7,972		9,143		2010
Valmont SM	8,720		7,966		2014
Ingal EPS/Ingal Civil Products	7,730		7,454		2010
Shakespeare	4,000		4,000		2014
Walpar	3,500		3,500		2018
Convert	9,137		8,378		2018
Other	14,828		17,555
	$	66,998	$	69,107

Schedule of Carrying Amount of Goodwill

The carrying amount of goodwill by segment as of December 26, 2020 and December 28, 2019 was as follows:

	Engineered Support Structures Segment		Utility Support Structures Segment		Coatings Segment		Irrigation Segment		Total
Gross balance at December 28, 2019	$	228,634	$	130,594	$	93,747	$	25,136	$	478,111
Accumulated impairment losses	(18,670)		(14,355)		(16,222)		—		(49,247)
Balance at December 28, 2019	209,964		116,239		77,525		25,136		$	428,864
Acquisitions	—		1,100		—		5,038		6,138
Impairment	(12,575)		—		—		—		(12,575)
Foreign currency translation	3,689		3,641		562		3		7,895
Balance at December 26, 2020	$	201,078	$	120,980	$	78,087	$	30,177	$	430,322

	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