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GOODWILL AND INTANGIBLE ASSETS (Tables)
 3 Months Ended
Mar. 27, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of components of amortized intangible assets
The components of amortized intangible assets at March 27, 2021 and December 26, 2020 were as follows:
March 27, 2021
Gross
Carrying
Amount		Accumulated
Amortization		Weighted
Average
Life
Customer Relationships
$237,388 $160,088 13 years
Patents & Proprietary Technology
25,823 8,642 14 years
Other
7,484 7,211 4 years
$270,695 $175,941 

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 weeks ended March 27, 2021 and March 28, 2020, respectively was as follows:
Thirteen weeks ended
20212020
$4,232 $4,593 
Schedule of future estimated amortization expense
Estimated annual amortization expense related to finite-lived intangible assets is as follows:
Estimated
Amortization
Expense
2021$15,976 
202213,337 
202311,503 
20249,587 
20258,153 
Schedule of non-amortized intangible assets The carrying value of trade names at March 27, 2021 and December 26, 2020 are as follows:
March 27,
2021		December 26,
2020		Year Acquired
Newmark$11,111 $11,111 2004
Webforge8,104 7,972 2010
Convert Italia S.p.A8,845 9,137 2018
Valmont SM8,443 8,720 2014
Ingal EPS/Ingal Civil Products7,857 7,730 2010
Walpar3,500 3,500 2018
Shakespeare4,000 4,000 2014
Other14,925 14,828 Various
$66,785 $66,998 
Schedule of carrying amount of goodwill
The carrying amount of goodwill by segment as of March 27, 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 
Foreign currency translation1,204 (1,438)207 (368)(395)
Balance at March 27, 2021$202,282 $119,542 $78,294 $29,809 $429,927