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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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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:
|  | 2023 |  | 2022
(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&I |  | 25,830 |  |  | — |  |  | 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 relationships |  | 71,139 |  |  | 20,905 |  |  | 50,234 |  |  | 71,138 |  |  | 16,094 |  |  | 55,044 |
Trade names |  | 695 |  |  | 403 |  |  | 292 |  |  | 695 |  |  | 357 |  |  | 338 |
Below market lease |  | 511 |  |  | 200 |  |  | 311 |  |  | 511 |  |  | 102 |  |  | 409 |
Foreign currency translation |  | (1,768) |  |  | (270) |  |  | (1,498) |  |  | (2,689) |  |  | (410) |  |  | (2,279) |
Indefinite-lived Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |
Trade names |  | 34,412 |  |  | — |  |  | 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 |
2025 |  | 4,954 |
2026 |  | 4,954 |
2027 |  | 4,815 |
2028 |  | 4,805 |
Thereafter |  | 24,857 |
Total |  | $ | 49,339 |

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