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Operating Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | $ 573,634 | $ 476,842 | $ 1,598,394 | $ 1,424,233 |
Gross profit | 194,781 | 107,609 | 510,198 | 303,973 |
Selling, general and administrative expenses | 104,694 | 74,300 | 285,816 | 211,417 |
Contingent consideration | 43 | 70 | 78 | 208 |
Loss (gain) on sale of assets | (132) | (1,080) | (1,576) | (14,242) |
Operating income (loss) | 90,176 | 34,319 | 225,880 | 106,590 |
Depreciation and amortization expense | 10,613 | 6,878 | 26,051 | 20,130 |
Capital expenditures | 17,532 | 4,609 | 30,891 | 11,286 |
Total assets | 1,155,336 | 899,728 | 1,155,336 | 899,728 | $ 981,600
Revenues | 768,415 | 584,451 | 2,108,592 | 1,728,206 |
Noncontrolling Interest, Change in Redemption Value | 7,333 |  | 16,056 | 11,742 |
Commercial and Industrial [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 74,860 | 58,872 | 222,711 | 177,821 |
Gross profit | 21,694 | 8,896 | 55,864 | 19,247 |
Selling, general and administrative expenses | 8,717 | 6,284 | 24,271 | 18,373 |
Loss (gain) on sale of assets | (52) | (13) | (105) | (13,147) |
Operating income (loss) | 13,029 | 2,625 | 31,698 | 14,021 |
Depreciation and amortization expense | 517 | 402 | 1,477 | 1,206 |
Capital expenditures | 801 | 800 | 3,019 | 2,069 |
Total assets | 97,741 | 84,101 | 97,741 | 84,101 |
Revenues | 96,554 | 67,768 | 278,575 | 197,068 |
Communications [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 155,184 | 114,440 | 444,225 | 355,904 |
Gross profit | 37,119 | 27,175 | 112,329 | 74,076 |
Selling, general and administrative expenses | 16,122 | 13,680 | 48,011 | 39,363 |
Loss (gain) on sale of assets | (7) | (1) | (27) | (4) |
Operating income (loss) | 21,004 | 13,496 | 64,345 | 34,717 |
Depreciation and amortization expense | 931 | 498 | 2,520 | 1,430 |
Capital expenditures | 6,319 | 261 | 8,255 | 1,383 |
Total assets | 262,677 | 182,117 | 262,677 | 182,117 |
Revenues | 192,303 | 141,615 | 556,554 | 429,980 |
Infrastructure Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 71,366 | 42,851 | 168,107 | 120,089 |
Gross profit | 30,656 | 14,206 | 72,592 | 38,868 |
Selling, general and administrative expenses | 10,886 | 7,066 | 25,798 | 18,817 |
Contingent consideration |  | 0 |  |  |
Loss (gain) on sale of assets | (3) | (1,010) | (3) | (1,029) |
Operating income (loss) | 19,730 | 8,150 | 46,754 | 21,080 |
Depreciation and amortization expense | 3,656 | 1,300 | 6,112 | 3,980 |
Capital expenditures | 4,862 | 918 | 6,897 | 2,117 |
Total assets | 289,619 | 179,363 | 289,619 | 179,363 |
Revenues | 102,022 | 57,057 | 240,699 | 158,957 |
Residential [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 272,224 | 260,679 | 763,351 | 770,419 |
Gross profit | 105,312 | 57,332 | 269,413 | 171,782 |
Selling, general and administrative expenses | 61,662 | 41,939 | 168,298 | 118,989 |
Contingent consideration | 0 | 70 | 35 | 208 |
Loss (gain) on sale of assets | (70) | (56) | (1,427) | (62) |
Operating income (loss) | 43,720 | 15,379 | 102,507 | 52,647 |
Depreciation and amortization expense | 5,282 | 4,609 | 15,256 | 13,310 |
Capital expenditures | 5,279 | 2,461 | 12,067 | 5,548 |
Total assets | 400,539 | 381,840 | 400,539 | 381,840 |
Revenues | 377,536 | 318,011 | 1,032,764 | 942,201 |
Corporate Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 0 | 0 | 0 | 0 |
Gross profit | 0 | 0 | 0 | 0 |
Selling, general and administrative expenses | 7,307 | 5,331 | 19,438 | 15,875 |
Contingent consideration |  | 0 |  |  |
Loss (gain) on sale of assets | 0 | 0 | (14) | 0 |
Operating income (loss) | (7,307) | (5,331) | (19,424) | (15,875) |
Depreciation and amortization expense | 227 | 69 | 686 | 204 |
Capital expenditures | 271 | 169 | 653 | 169 |
Total assets | 104,760 | 72,307 | 104,760 | 72,307 |
Revenues | $ 0 | $ 0 | $ 0 | $ 0 |

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