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Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill and intangible assets
Goodwill and intangible assets consisted of the following at December 31:
20232022
(in thousands)Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Gross
Carrying
Amount
Accumulated
Amortization
Net
Carrying
Amount
Goodwill
T&D$93,240 $— $93,240 $93,240 $— $93,240 
C&I25,830 — 25,830 25,830 — 25,830 
Foreign currency translation(2,117)— (2,117)(3,223)— (3,223)
Total goodwill$116,953 $— $116,953 $115,847 $— $115,847 
Amortizable Intangible Assets
Backlog$9,296 $9,296 $— $9,296 $9,296 $— 
Customer relationships71,139 20,905 50,234 71,138 16,094 55,044 
Trade names695 403 292 695 357 338 
Below market lease511 200 311 511 102 409 
Foreign currency translation(1,768)(270)(1,498)(2,689)(410)(2,279)
Indefinite-lived Intangible Assets
Trade names34,412 — 34,412 34,412 — 34,412 
Foreign currency translation(235)— (235)(367)— (367)
Total intangible assets$114,050 $30,534 $83,516 $112,996 $25,439 $87,557 
Schedule of estimated future intangible asset amortization expense
As of December 31, 2023, estimated future intangible asset amortization expense for the each of the next five years and thereafter was as follows:
(in thousands)Future
Amortization
Expense
2024$4,954 
20254,954 
20264,954 
20274,815 
20284,805 
Thereafter24,857 
Total$49,339