GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of components of amortized intangible assets

The components of amortized intangible assets at December 30, 2017 and December 31, 2016 were as follows:

	December 30, 2017
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	200,810	$	131,062	13 years
Proprietary Software & Database	3,671		3,107		8 years
Patents & Proprietary Technology	6,693		3,999		11 years
Other	4,861		4,121		3 years
	$	216,035	$	142,289

	December 31, 2016
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	191,316	$	111,342	13 years
Proprietary Software & Database	3,616		3,056		8 years
Patents & Proprietary Technology	6,434		3,420		11 years
Other	3,713		3,668		3 years
	$	205,079	$	121,486

Schedule of future estimated amortization expense

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

	Estimated Amortization Expense
2018	$	14,537
2019	13,761
2020	12,647
2021	10,525
2022	7,550

Schedule of non-amortized intangible assets

The carrying values of trade names at December 30, 2017 and December 31, 2016 were as follows:

(7) GOODWILL AND INTANGIBLE ASSETS (Continued)

	December 30, 2017		December 31, 2016		Year Acquired
Webforge	$	9,432	$	8,624	2010
Valmont SM	9,973		8,765		2014
Newmark	11,111		11,111		2004
Ingal EPS/Ingal Civil Products	7,690		7,032		2010
Donhad	5,801		5,305		2010
Shakespeare	4,000		4,000		2014
Other	16,846		15,948
	$	64,853	$	60,785

Schedule of carrying amount of goodwill

The carrying amount of goodwill by segment as of December 30, 2017 and December 31, 2016 was as follows:

	Engineered Support Structures Segment			Utility Support Structures Segment		Coatings Segment			Irrigation Segment		Other		Total
Gross Balance at December 31, 2016	$	157,689		$	88,680	$	75,791		$	19,359	$	17,487	$	356,002
Accumulated impairment losses	(18,670		)	—		(16,222		)	—		—		(34,892		)
Balance at December 31, 2016	$	139,019		$	88,451	$	59,569		$	19,611	$	14,460	$	321,110
Acquisitions	3,449			—		—			—		—		3,449
Foreign currency translation	8,938			1,797		905			167		1,354		13,161
Balance at December 30, 2017	$	151,406		$	90,248	$	60,474		$	19,778	$	15,814	$	337,720

(7) GOODWILL AND INTANGIBLE ASSETS (Continued)

	Engineered Support Structures Segment			Utility Support Structures Segment			Coatings Segment			Irrigation Segment		Other			Total
Gross Balance at December 26, 2015	$	170,341		$	88,680		$	75,941		$	19,359	$	17,487		$	371,808
Accumulated impairment losses	(18,670		)	—			(16,222		)	—		—			(34,892		)
Balance at December 26, 2015	151,671			88,680			59,719			19,359		17,487			336,916
Foreign currency translation	(12,652		)	(229		)	(150		)	252		(3,027		)	(15,806		)
Balance at December 31, 2016	$	139,019		$	88,451		$	59,569		$	19,611	$	14,460		$	321,110