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GOODWILL AND INTANGIBLE ASSETS (Tables)
 6 Months Ended
Jun. 26, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of components of amortized intangible assets
The components of amortized intangible assets at June 26, 2021 and December 26, 2020 were as follows:
June 26, 2021
Gross
Carrying
Amount		Accumulated
Amortization		Weighted
Average
Life
Customer Relationships
$241,422 $164,636 13 years
Patents & Proprietary Technology
63,413 10,023 9 years
Other
7,543 6,841 4 years
$312,378 $181,500 
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 twenty-six weeks ended June 26, 2021 and June 27, 2020, respectively was as follows:
Thirteen weeks endedTwenty-six weeks ended
2021202020212020
$5,182 $4,511 $9,414 $9,103 
Schedule of future estimated amortization expense Estimated annual amortization expense related to finite-lived intangible assets is as follows:
Estimated
Amortization
Expense
2021$21,159 
202221,161 
202319,324 
202417,374 
202515,929 
Schedule of non-amortized intangible assets The carrying value of trade names at June 26, 2021 and December 26, 2020 are as follows:
June 26,
2021		December 26,
2020		Year Acquired
Newmark$11,111 $11,111 2004
Webforge8,158 7,972 2010
Convert Italia S.p.A8,951 9,137 2018
Valmont SM8,544 8,720 2014
Ingal EPS/Ingal Civil Products7,910 7,730 2010
Walpar3,500 3,500 2018
Shakespeare4,000 4,000 2014
Other17,943 14,828 Various
$70,117 $66,998 
Schedule of carrying amount of goodwill The carrying amount of goodwill by segment as of June 26, 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 translation1,948 (934)510 226 1,750 
Balance at June 26, 2021$203,026 $120,046 $78,597 $311,062 $712,731