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Operating Segments (Tables)
12 Months Ended
Sep. 30, 2022
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Year Ended September 30, 2022
CommunicationsResidentialInfrastructure SolutionsCommercial & IndustrialCorporateTotal
Revenues$559,777 $1,131,414 $167,113 $308,504 $— $2,166,808 
Cost of services490,959 928,161 138,444 290,314 — 1,847,878 
Gross profit68,818 203,253 28,669 18,190 — 318,930 
Selling, general and administrative46,717 144,100 25,129 30,557 16,211 262,714 
Contingent consideration— 277 — — — 277 
Loss (gain) on sale of assets12 20 (46)(55)— (69)
Income (loss) from operations$22,089 $58,856 $3,586 $(12,312)$(16,211)$56,008 
Other data:
Depreciation and amortization expense$1,550 $15,617 $5,575 $2,561 $165 $25,468 
Capital expenditures$2,004 $10,054 $14,729 $1,890 $578 $29,255 
Total assets$210,875 $394,757 $161,828 $114,529 $52,720 $934,709 

Year Ended September 30, 2021
CommunicationsResidentialInfrastructure SolutionsCommercial & IndustrialCorporateTotal
Revenues$445,968 $687,347 $146,980 $256,198 $— $1,536,493 
Cost of services361,197 553,546 106,048 227,704 — 1,248,495 
Gross profit84,771 133,801 40,932 28,494 — 287,998 
Selling, general and administrative41,373 92,761 23,966 28,172 15,979 202,251 
Contingent consideration— 211 — — — 211 
Loss (gain) on sale of assets(4)86 (10)(92)(27)(47)
Income (loss) from operations$43,402 $40,743 $16,976 $414 $(15,952)$85,583 
Other data:
Depreciation and amortization expense$1,394 $11,490 $6,170 $2,709 $151 $21,914 
Capital expenditures$963 $2,829 $2,067 $1,453 $89 $7,401 
Total assets$164,699 $329,691 $137,628 $87,577 $47,027 $766,622 

Year Ended September 30, 2020
CommunicationsResidentialInfrastructure SolutionsCommercial & IndustrialCorporateTotal
Revenues$395,141 $411,790 $128,379 $255,546 $— $1,190,856 
Cost of services317,013 318,034 93,358 234,492 — 962,897 
Gross profit78,128 93,756 35,021 21,054 — 227,959 
Selling, general and administrative37,674 63,668 20,418 32,128 17,023 170,911 
Goodwill impairment expense— — — 6,976 — 6,976 
Contingent consideration— — — (11)— (11)
Loss (gain) on sale of assets35 (45)— — 
Income (loss) from operations$40,446 $30,086 $14,568 $(17,994)$(17,023)$50,083 
Other data:
Depreciation and amortization expense$1,351 $2,276 $6,020 $2,768 $93 $12,508 
Capital expenditures$830 $1,459 $795 $1,362 $299 $4,745 
Total assets$154,808 $110,998 $124,640 $68,318 $101,764 $560,528