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Goodwill and Intangible Assets Goodwill (Details)
$ in Thousands
 9 Months Ended
Jun. 30, 2024
USD ($)
Goodwill [Line Items]  
Goodwill $ 92,395
Goodwill 94,543
Goodwill, Acquired During Period 2,148
Commercial and Industrial [Member]  
Goodwill [Line Items]  
Goodwill 0
Goodwill 0
Residential [Member]  
Goodwill [Line Items]  
Goodwill 51,370
Goodwill 51,370
Goodwill, Acquired During Period 0
Infrastructure Solutions [Member]  
Goodwill [Line Items]  
Goodwill 38,209
Goodwill 40,357
Goodwill, Acquired During Period 2,148
Communications [Member]  
Goodwill [Line Items]  
Goodwill 2,816
Goodwill $ 2,816