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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
CommunicationsResidentialInfrastructure SolutionsCommercial & IndustrialTotal
Balance at September 30, 2020$2,816 $16,219 $34,728 $— $53,763 
Acquisitions (Note 19)— 35,151 3,481 — 38,632 
Balance at September 30, 20212,816 51,370 38,209 — 92,395 
Balance at September 30, 2022$2,816 $51,370 $38,209 $— $92,395 
Schedule of Finite-Lived Intangible Assets [Table Text Block]
September 30, 2021
Estimated Useful Lives (in Years)Gross Carrying AmountAccumulated AmortizationNet
Trademarks/trade names5-20$15,262 $(2,891)$12,371 
Technical library20400 (161)239 
Customer relationships6-1596,879 (24,021)72,858 
Non-competition arrangements540 (25)15 
Backlog and construction contracts14,957 (4,821)136 
Total$117,538 $(31,919)$85,619 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Year Ending September 30,
2023$13,153 
202412,810 
202512,370 
202612,031 
20278,631 
Thereafter12,941 
Total$71,936