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Operating Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | $ 534,120 | $ 467,955 | $ 1,024,760 | $ 947,391 |
Gross profit | 171,613 | 100,926 | 315,417 | 196,364 |
Selling, general and administrative expenses | 95,272 | 69,349 | 181,122 | 137,117 |
Contingent consideration | 0 | 69 | 35 | 138 |
Loss (gain) on sale of assets | (1,373) | (102) | (1,444) | (13,162) |
Operating income (loss) | 77,714 | 31,610 | 135,704 | 72,271 |
Depreciation and amortization expense | 7,821 | 6,864 | 15,438 | 13,252 |
Capital expenditures | 6,844 | 3,965 | 13,359 | 6,677 |
Total assets | 1,101,164 | 889,088 | 1,101,164 | 889,088 | $ 981,600
Revenues | 705,733 | 568,881 | 1,340,177 | 1,143,755 |
Noncontrolling Interest, Change in Redemption Value | 5,941 | 2,771 | 8,723 | 5,826 |
Commercial and Industrial [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 76,806 | 62,296 | 147,851 | 118,949 |
Gross profit | 20,263 | 6,737 | 34,170 | 10,351 |
Selling, general and administrative expenses | 8,707 | 6,400 | 15,554 | 12,089 |
Loss (gain) on sale of assets | (68) | (99) | (53) | (13,134) |
Operating income (loss) | 11,624 | 436 | 18,669 | 11,396 |
Depreciation and amortization expense | 485 | 412 | 960 | 804 |
Capital expenditures | 1,397 | 546 | 2,218 | 1,269 |
Total assets | 98,845 | 87,721 | 98,845 | 87,721 |
Revenues | 97,069 | 69,033 | 182,021 | 129,300 |
Communications [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 154,568 | 115,957 | 289,041 | 241,464 |
Gross profit | 38,935 | 25,163 | 75,210 | 46,901 |
Selling, general and administrative expenses | 16,988 | 13,386 | 31,889 | 25,683 |
Loss (gain) on sale of assets | (16) | (3) | (20) | (3) |
Operating income (loss) | 21,963 | 11,780 | 43,341 | 21,221 |
Depreciation and amortization expense | 866 | 502 | 1,589 | 932 |
Capital expenditures | 936 | 480 | 1,936 | 1,122 |
Total assets | 230,386 | 188,937 | 230,386 | 188,937 |
Revenues | 193,503 | 141,120 | 364,251 | 288,365 |
Infrastructure Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 52,044 | 38,421 | 96,741 | 77,238 |
Gross profit | 23,745 | 14,195 | 41,936 | 24,662 |
Selling, general and administrative expenses | 7,627 | 5,990 | 14,912 | 11,751 |
Contingent consideration |  | 0 |  |  |
Loss (gain) on sale of assets | 0 | 0 | 0 | (19) |
Operating income (loss) | 16,118 | 8,205 | 27,024 | 12,930 |
Depreciation and amortization expense | 1,229 | 1,326 | 2,456 | 2,680 |
Capital expenditures | 884 | 560 | 2,035 | 1,199 |
Total assets | 200,476 | 173,621 | 200,476 | 173,621 |
Revenues | 75,789 | 52,616 | 138,677 | 101,900 |
Residential [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Cost of services | 250,702 | 251,281 | 491,127 | 509,740 |
Gross profit | 88,670 | 54,831 | 164,101 | 114,450 |
Selling, general and administrative expenses | 55,258 | 37,999 | 106,636 | 77,050 |
Contingent consideration | 0 | 69 | 35 | 138 |
Loss (gain) on sale of assets | (1,275) | 0 | (1,357) | (6) |
Operating income (loss) | 34,687 | 16,763 | 58,787 | 37,268 |
Depreciation and amortization expense | 5,012 | 4,557 | 9,974 | 8,701 |
Capital expenditures | 3,424 | 2,379 | 6,788 | 3,087 |
Total assets | 396,760 | 389,946 | 396,760 | 389,946 |
Revenues | 339,372 | 306,112 | 655,228 | 624,190 |
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 | 6,692 | 5,574 | 12,131 | 10,544 |
Contingent consideration |  | 0 |  |  |
Loss (gain) on sale of assets | (14) | 0 | (14) | 0 |
Operating income (loss) | (6,678) | (5,574) | (12,117) | (10,544) |
Depreciation and amortization expense | 229 | 67 | 459 | 135 |
Capital expenditures | 203 | 0 | 382 | 0 |
Total assets | 174,697 | 48,863 | 174,697 | 48,863 |
Revenues | $ 0 | $ 0 | $ 0 | $ 0 |

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