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GOODWILL AND INTANGIBLE ASSETS (Tables)
 9 Months Ended
Sep. 25, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of components of amortized intangible assets
The components of amortized intangible assets at September 25, 2021 and December 26, 2020 were as follows:
September 25, 2021
Gross
Carrying
Amount		Accumulated
Amortization		Weighted
Average
Life
Customer Relationships
$239,493 $166,857 13 years
Patents & Proprietary Technology
63,109 12,318 8 years
Other
7,469 6,828 4 years
$310,071 $186,003 
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 
Schedule of amortization expense for intangible assets Amortization expense for intangible assets for the thirteen and thirty-nine weeks ended September 25, 2021 and September 26, 2020, respectively was as follows:
Thirteen weeks endedThirty-nine weeks ended
2021202020212020
$6,137 $4,518 $15,551 $13,621 
Schedule of future estimated amortization expense Estimated annual amortization expense related to finite-lived intangible assets is as follows:
Estimated
Amortization
Expense
2021$21,392 
202221,062 
202319,261 
202417,324 
202515,868 
Schedule of non-amortized intangible assets The carrying value of trade names at September 25, 2021 and December 26, 2020 are as follows:
September 25,
2021		December 26,
2020		Year Acquired
Newmark$11,111 $11,111 2004
Webforge8,035 7,972 2010
Convert Italia S.p.A8,790 9,137 2018
Valmont SM8,386 8,720 2014
Ingal EPS/Ingal Civil Products7,790 7,730 2010
Walpar3,500 3,500 2018
Shakespeare4,000 4,000 2014
Other17,769 14,828 Various
$69,381 $66,998 
Schedule of carrying amount of goodwill The carrying amount of goodwill by segment as of September 25, 2021 and December 26, 2020 was as follows:
Engineered
Support
Structures
Segment		Utility
Support
Structures
Segment		Coatings
Segment		Irrigation
Segment		Total
Gross Balance December 26, 2020$232,323 $135,335 $94,309 $30,177 $492,144 
   Accumulated impairment losses(31,245)(14,355)(16,222)— (61,822)
Balance at December 26, 2020201,078 120,980 78,087 30,177 430,322 
   Acquisitions— — — 280,659 280,659 
Foreign currency translation170 (1,731)129 (87)(1,519)
Balance at September 25, 2021$201,248 $119,249 $78,216 $310,749 $709,462