v3.25.1
Operating Segments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Sep. 30, 2024
Segment Reporting Information [Line Items]          
Cost of services $ 625,091 $ 534,120 $ 1,196,611 $ 1,024,760  
Gross profit 208,869 171,613 386,896 315,417  
Selling, general and administrative expenses 116,044 95,272 219,083 181,122  
Contingent consideration 339 0 678 35  
Loss (gain) on sale of assets (209) (1,373) (179) (1,444)  
Operating income (loss) 92,695 77,714 167,314 135,704  
Depreciation and amortization expense 11,948 7,821 23,035 15,438  
Capital expenditures 16,953 6,844 30,122 13,359  
Total assets 1,364,559 1,101,164 1,364,559 1,101,164 $ 1,244,026
Revenues 833,960 705,733 1,583,507 1,340,177  
Noncontrolling Interest, Change in Redemption Value (86)   1,401 11,549  
Commercial and Industrial [Member]          
Segment Reporting Information [Line Items]          
Cost of services 98,505 76,806 171,880 147,851  
Gross profit 26,853 20,263 41,969 34,170  
Selling, general and administrative expenses 11,024 8,707 19,088 15,554  
Loss (gain) on sale of assets (23) (68) (27) (53)  
Operating income (loss) 15,852 11,624 22,908 18,669  
Depreciation and amortization expense 612 485 1,185 960  
Capital expenditures 2,149 1,397 5,131 2,218  
Total assets 121,990 98,845 121,990 98,845  
Revenues 125,358 97,069 213,849 182,021  
Communications [Member]          
Segment Reporting Information [Line Items]          
Cost of services 209,973 154,568 394,122 289,041  
Gross profit 63,043 38,935 111,854 75,210  
Selling, general and administrative expenses 23,441 16,988 43,679 31,889  
Loss (gain) on sale of assets (21) (16) (59) (20)  
Operating income (loss) 39,623 21,963 68,234 43,341  
Depreciation and amortization expense 1,255 866 2,458 1,589  
Capital expenditures 6,372 936 11,052 1,936  
Total assets 343,356 230,386 343,356 230,386  
Revenues 273,016 193,503 505,976 364,251  
Infrastructure Solutions [Member]          
Segment Reporting Information [Line Items]          
Cost of services 78,319 52,044 151,472 96,741  
Gross profit 39,301 23,745 74,273 41,936  
Selling, general and administrative expenses 12,487 7,627 23,755 14,912  
Contingent consideration 339   678    
Loss (gain) on sale of assets (9) 0 70 0  
Operating income (loss) 26,484 16,118 49,770 27,024  
Depreciation and amortization expense 3,942 1,229 7,615 2,456  
Capital expenditures 2,999 884 5,110 2,035  
Total assets 328,027 200,476 328,027 200,476  
Revenues 117,620 75,789 225,745 138,677  
Residential [Member]          
Segment Reporting Information [Line Items]          
Cost of services 238,294 250,702 479,137 491,127  
Gross profit 79,672 88,670 158,800 164,101  
Selling, general and administrative expenses 57,151 55,258 112,463 106,636  
Contingent consideration 0   0 35  
Loss (gain) on sale of assets (156) (1,275) (163) (1,357)  
Operating income (loss) 22,677 34,687 46,500 58,787  
Depreciation and amortization expense 5,913 5,012 11,324 9,974  
Capital expenditures 3,748 3,424 6,089 6,788  
Total assets 379,510 396,760 379,510 396,760  
Revenues 317,966 339,372 637,937 655,228  
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 11,941 6,692 20,098 12,131  
Loss (gain) on sale of assets 0 (14) 0 (14)  
Operating income (loss) (11,941) (6,678) (20,098) (12,117)  
Depreciation and amortization expense 226 229 453 459  
Capital expenditures 1,685 203 2,740 382  
Total assets 191,676 174,697 191,676 174,697  
Revenues $ 0 $ 0 $ 0 $ 0