GOODWILL AND INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 26, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of components of amortized intangible assets

The components of amortized intangible assets at March 26, 2016 and December 26, 2015 were as follows:

	March 26, 2016
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	199,902	$	104,376	13 years
Proprietary Software & Database	3,611		2,997		8 years
Patents & Proprietary Technology	6,835		3,528		11 years
Other	3,862		3,788		3 years
	$	214,210	$	114,689

(4) GOODWILL AND INTANGIBLE ASSETS (Continued)

	December 26, 2015
	Gross Carrying Amount		Accumulated Amortization		Weighted Average Life
Customer Relationships	$	201,801	$	101,614	13 years
Proprietary Software & Database	3,571		2,966		8 years
Patents & Proprietary Technology	6,815		3,421		11 years
Other	3,752		3,671		3 years
	$	215,939	$	111,672

Schedule of amortization expense for intangible assets

Amortization expense for intangible assets for the thirteen weeks ended March 26, 2016 and March 28, 2015, respectively was as follows:

Thirteen Weeks Ended
2016		2015
$	3,995	$	4,913

Schedule of future estimated amortization expense

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

	Estimated Amortization Expense
2016	$	15,841
2017	15,754
2018	14,116
2019	13,324
2020	12,283

Schedule of non-amortized intangible assets

The carrying values of trade names at March 26, 2016 and December 26, 2015 were as follows:

	March 26, 2016		December 26, 2015		Year Acquired
Webforge	$	9,877	$	10,430	2010
Valmont SM	9,286		8,919		2014
Newmark	11,111		11,111		2004
Ingal EPS/Ingal Civil Products	8,053		8,504		2010
Donhad	6,075		6,415		2010
Shakespeare	4,000		4,000		2014
Industrial Galvanizers	2,521		2,662		2010
Other	14,093		13,889
	$	65,016	$	65,930

Schedule of carrying amount of goodwill

The carrying amount of goodwill by segment as of March 26, 2016 and December 26, 2015 was as follows:

	Engineered Support Structures Segment			Energy & Mining Segment			Utility Support Structures Segment		Coatings Segment			Irrigation Segment		Total
Gross goodwill at December 26, 2015	$	101,275		$	99,829		$	75,404	$	75,941		$	19,359	$	371,808
Accumulated impairment losses	—			(18,670		)	—		(16,222		)	—		(34,892		)
Balance at December 26, 2015	$	101,275		$	81,159		$	75,404	$	59,719		$	19,359	$	336,916
Foreign currency translation	(1,502		)	(1,462		)	—		290			27		(2,647		)
Balance at March 26, 2016	$	99,773		$	79,697		$	75,404	$	60,009		$	19,386	$	334,269