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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Jun. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The following summarizes changes in the carrying value of goodwill by segment during the nine months ended June 30, 2024:
| Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Goodwill at September 30, 2023 |  | $ | 2,816 |  |  | $ | 51,370 |  |  | $ | 38,209 |  |  | $ | — |  |  | $ | 92,395 |
Acquisitions |  | — |  |  | — |  |  | 2,148 |  |  | — |  |  | 2,148 |
Goodwill at June 30, 2024 |  | $ | 2,816 |  |  | $ | 51,370 |  |  | $ | 40,357 |  |  | $ | — |  |  | $ | 94,543 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | Intangible assets consist of the following:
|  | Estimated Useful Lives (in Years) |  | June 30, 2024
|  |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  | Net
Trademarks/trade names |  | 5 | - | 20 |  |  | $ | 13,821 |  |  |  | $ | (6,568) |  |  |  | $ | 7,253 |
Technical library |  | 20 |  |  | 400 |  |  |  | (216) |  |  |  | 184 |
Customer relationships |  | 6 | - | 15 |  |  | 92,926 |  |  |  | (51,497) |  |  |  | 41,429 |
Non-competition arrangements |  | 5 |  |  | 40 |  |  |  | (40) |  |  |  | — |
Backlog and construction contracts |  | 1 |  |  | 4,018 |  |  |  | (3,376) |  |  |  | 642 |
Total intangible assets |  |  |  |  |  |  | $ | 111,205 |  |  |  | $ | (61,697) |  |  |  | $ | 49,508 |
|  |  | Estimated Useful Lives (in Years) |  | September 30, 2023
|  |  |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  | Net
Trademarks/trade names |  | 5 | - | 20 |  |  | $ | 14,621 |  |  |  | $ | (6,973) |  |  |  | $ | 7,648 |
Technical library |  | 20 |  |  | 400 |  |  |  | (201) |  |  |  | 199 |
Customer relationships |  | 6 | - | 15 |  |  | 91,426 |  |  |  | (43,065) |  |  |  | 48,361 |
Non-competition arrangements |  | 5 |  |  | 40 |  |  |  | (40) |  |  |  | — |
Backlog and construction contracts |  | 1 |  |  | 4,958 |  |  |  | (4,958) |  |  |  | — |
Total intangible assets |  |  |  |  |  |  | $ | 111,445 |  |  |  | $ | (55,237) |  |  |  | $ | 56,208 |

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