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Operating Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Segment Reporting Information [Line Items] |  |  |
Revenues | $ 2,884,358 | $ 2,377,227 | $ 2,166,808
Cost of services | 2,187,768 | 1,932,688 | 1,847,878
Gross profit | 696,590 | 444,539 | 318,930
Selling, general and administrative expenses | 396,684 | 298,625 | 262,714
Contingent consideration | 714 | 277 | 277
Loss (gain) on sale of assets | (1,684) | (14,139) | (69)
Operating income (loss) | 300,876 | 159,776 | 56,008
Depreciation and amortization | 37,103 | 29,407 | 25,468
Capital expenditures | 45,159 | 17,667 | 29,255
Total assets | 1,244,026 | 981,600 | 934,709
Communications [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 776,474 | 600,776 | 559,777
Cost of services | 623,844 | 494,964 | 490,959
Gross profit | 152,630 | 105,812 | 68,818
Selling, general and administrative expenses | 65,752 | 54,344 | 46,717
Contingent consideration | 0 | 0 | 0
Loss (gain) on sale of assets | (18) | 12 | 12
Operating income (loss) | 86,896 | 51,456 | 22,089
Depreciation and amortization | 3,627 | 2,215 | 1,550
Capital expenditures | 13,493 | 2,203 | 2,004
Total assets | 285,478 | 205,924 | 210,875
Residential [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 1,388,840 | 1,279,504 | 1,131,414
Cost of services | 1,024,440 | 1,026,524 | 928,161
Gross profit | 364,400 | 252,980 | 203,253
Selling, general and administrative expenses | 228,371 | 169,737 | 144,100
Contingent consideration | 36 | 277 | 277
Loss (gain) on sale of assets | (1,354) | 69 | 20
Operating income (loss) | 137,347 | 82,897 | 58,856
Depreciation and amortization | 20,752 | 19,281 | 15,617
Capital expenditures | 15,620 | 9,114 | 10,054
Total assets | 395,682 | 386,829 | 394,757
Infrastructure Solutions [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 351,096 | 217,353 | 167,113
Cost of services | 245,743 | 162,905 | 138,444
Gross profit | 105,353 | 54,448 | 28,669
Selling, general and administrative expenses | 37,394 | 26,260 | 25,129
Contingent consideration | 678 | 0 | 0
Loss (gain) on sale of assets | (184) | (1,029) | (46)
Operating income (loss) | 67,465 | 29,217 | 3,586
Depreciation and amortization | 9,783 | 5,198 | 5,575
Capital expenditures | 8,916 | 2,767 | 14,729
Total assets | 288,765 | 180,871 | 161,828
Commercial and Industrial [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 367,948 | 279,594 | 308,504
Cost of services | 293,741 | 248,295 | 290,314
Gross profit | 74,207 | 31,299 | 18,190
Selling, general and administrative expenses | 32,925 | 25,225 | 30,557
Contingent consideration | 0 | 0 | 0
Loss (gain) on sale of assets | (114) | (13,198) | (55)
Operating income (loss) | 41,396 | 19,272 | (12,312)
Depreciation and amortization | 2,028 | 1,640 | 2,561
Capital expenditures | 5,205 | 2,525 | 1,890
Total assets | 89,023 | 87,677 | 114,529
Corporate Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 | 0
Cost of services | 0 | 0 | 0
Gross profit | 0 | 0 | 0
Selling, general and administrative expenses | 32,242 | 23,059 | 16,211
Contingent consideration | 0 | 0 | 0
Loss (gain) on sale of assets | (14) | 7 | 0
Operating income (loss) | (32,228) | (23,066) | (16,211)
Depreciation and amortization | 913 | 1,073 | 165
Capital expenditures | 1,925 | 1,058 | 578
Total assets | $ 185,078 | $ 120,299 | $ 52,720

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