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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] |
| Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Balance at September 30, 2020 | $ | 2,816 |  |  | $ | 16,219 |  |  | $ | 34,728 |  |  | $ | — |  |  | $ | 53,763 |
Acquisitions (Note 19) | — |  |  | 35,151 |  |  | 3,481 |  |  | — |  |  | 38,632 |
Balance at September 30, 2021 | 2,816 |  |  | 51,370 |  |  | 38,209 |  |  | — |  |  | 92,395 |
Balance at September 30, 2022 | $ | 2,816 |  |  | $ | 51,370 |  |  | $ | 38,209 |  |  | $ | — |  |  | $ | 92,395 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  |  |  |  | September 30, 2021
| Estimated Useful Lives (in Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Trademarks/trade names | 5 | - | 20 |  | $ | 15,262 |  |  | $ | (2,891) |  |  | $ | 12,371 |
Technical library | 20 |  | 400 |  |  | (161) |  |  | 239 |
Customer relationships | 6 | - | 15 |  | 96,879 |  |  | (24,021) |  |  | 72,858 |
Non-competition arrangements | 5 |  | 40 |  |  | (25) |  |  | 15 |
Backlog and construction contracts | 1 |  | 4,957 |  |  | (4,821) |  |  | 136 |
Total |  |  | $ | 117,538 |  |  | $ | (31,919) |  |  | $ | 85,619 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Year Ending September 30,
2023 | $ | 13,153 |
2024 | 12,810 |
2025 | 12,370 |
2026 | 12,031 |
2027 | 8,631 |
Thereafter | 12,941 |
Total | $ | 71,936 |

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