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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Jun. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
The following summarizes changes in the carrying value of goodwill by segment during the nine months ended June 30, 2025:
CommunicationsResidentialInfrastructure SolutionsCommercial & IndustrialTotal
Goodwill at September 30, 2024$2,816 $51,370 $39,774 $— $93,960 
Acquisitions— — 1,335 
(1)
— 1,335 
Goodwill at June 30, 2025$2,816 $51,370 $41,109 $— $95,295 
(1)     On January 31, 2025, the Company acquired all of the equity interests of Arrow Engine Company for a purchase price of $22,406. As of the date of this report, the fair value of the total consideration for this transaction and the amount of goodwill acquired are pending our final valuation of the net deferred tax liability acquired.
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Intangible assets consist of the following:
Estimated Useful Lives (in Years)June 30, 2025
Gross Carrying AmountAccumulated AmortizationNet
Trademarks/trade names5-20$15,121 $(8,121)$7,000 
Technical library20400 (236)164 
Customer relationships1-1594,746 (63,247)31,499 
Backlog and construction contracts1-2750 (536)214 
Total intangible assets$111,017 $(72,140)$38,877 

Estimated Useful Lives (in Years)September 30, 2024
Gross Carrying AmountAccumulated AmortizationNet
Trademarks/trade names5-20$13,821 $(6,964)$6,857 
Technical library20400 (221)179 
Customer relationships1-1592,796 (54,478)38,318 
Backlog and construction contracts1-2750 (214)536 
Total intangible assets$107,767 $(61,877)$45,890