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Revenue Recognition (Tables) | 12 Months Ended
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Sep. 30, 2024
Revenue Recognition and Deferred Revenue [Abstract] |
Disaggregation of Revenue [Table Text Block] |
| Year Ended September 30,
| 2024 |  | 2023 |  | 2022
Communications | $ | 776,474 |  |  | $ | 600,776 |  |  | $ | 559,777 |
Residential |  |  |  |  |
Single-family Electrical | 732,334 |  |  | 717,386 |  |  | 660,602 |
Single-family Plumbing & HVAC | 324,911 |  |  | 243,885 |  |  | 164,903 |
Multi-family and Other | 331,595 |  |  | 318,233 |  |  | 305,909 |
Total Residential | 1,388,840 |  |  | 1,279,504 |  |  | 1,131,414 |
Infrastructure Solutions |  |  |  |  |
Industrial Services | 53,291 |  |  | 46,091 |  |  | 65,686 |
Custom Engineered Solutions | 297,805 |  |  | 171,262 |  |  | 101,427 |
Total Infrastructure Solutions | 351,096 |  |  | 217,353 |  |  | 167,113 |
Commercial & Industrial | 367,948 |  |  | 279,594 |  |  | 308,504 |
Total Revenue | $ | 2,884,358 |  |  | $ | 2,377,227 |  |  | $ | 2,166,808 |
|  | Year Ended September 30, 2024
|  |  | Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Fixed-price |  | $ | 554,160 |  |  | $ | 1,388,840 |  |  | $ | 336,786 |  |  | $ | 316,365 |  |  | $ | 2,596,151 |
Time-and-material |  | 222,314 |  |  | — |  |  | 14,310 |  |  | 51,583 |  |  | 288,207 |
Total revenue |  | $ | 776,474 |  |  | $ | 1,388,840 |  |  | $ | 351,096 |  |  | $ | 367,948 |  |  | $ | 2,884,358 |
|  | Year Ended September 30, 2023
|  |  | Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Fixed-price |  | $ | 404,684 |  |  | $ | 1,279,504 |  |  | $ | 210,547 |  |  | $ | 241,159 |  |  | $ | 2,135,894 |
Time-and-material |  | 196,092 |  |  | — |  |  | 6,806 |  |  | 38,435 |  |  | 241,333 |
Total revenue |  | $ | 600,776 |  |  | $ | 1,279,504 |  |  | $ | 217,353 |  |  | $ | 279,594 |  |  | $ | 2,377,227 |
|  | Year Ended September 30, 2022
|  |  | Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Fixed-price |  | $ | 367,513 |  |  | $ | 1,131,414 |  |  | $ | 159,994 |  |  | $ | 282,522 |  |  | $ | 1,941,443 |
Time-and-material |  | 192,264 |  |  | — |  |  | 7,119 |  |  | 25,982 |  |  | 225,365 |
Total revenue |  | $ | 559,777 |  |  | $ | 1,131,414 |  |  | $ | 167,113 |  |  | $ | 308,504 |  |  | $ | 2,166,808 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 + Details
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