GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of components of amortized intangible assets

he components of amortized intangible assets at March 31, 2018 and December 30, 2017 were as follows:

	March 31, 2018
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	191,117	$	126,168	13 years
Proprietary Software & Database	3,659		3,115		8 years
Patents & Proprietary Technology	6,748		4,115		11 years
Other	5,035		4,248		3 years
	$	206,559	$	137,646

	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

Schedule of amortization expense for intangible assets

Amortization expense for intangible assets for the thirteen weeks ended March 31, 2018 and April 1, 2017, respectively was as follows:

Thirteen Weeks Ended
2018	2017
3,883	3,863

Schedule of future estimated amortization expense

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

	Estimated Amortization Expense
2018	$	14,167
2019	12,986
2020	11,879
2021	9,796
2022	7,494

Schedule of non-amortized intangible assets

The carrying values of trade names at March 31, 2018 and December 30, 2017 were as follows:

	March 31, 2018		December 30, 2017		Year Acquired
Webforge	$	9,793	$	9,432	2010
Valmont SM	10,243		9,973		2014
Newmark	11,111		11,111		2004
Ingal EPS/Ingal Civil Products	7,985		7,690		2010
Shakespeare	4,000		4,000		2014
Other	17,495		22,647
	$	60,627	$	64,853

Schedule of carrying amount of goodwill

The carrying amount of goodwill by segment as of March 31, 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	—			—		—			3,922			—			3,922
Assets held for sale	—			—		—			—			(16,420		)	(16,420		)
Foreign currency translation	1,984			402		(200		)	(140		)	606			2,652
Balance at March 31, 2018	$	153,390		$	90,650	$	60,274		$	23,560		$	—		$	327,874