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Acquisitions (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Jul. 09, 2025
Apr. 01, 2024
Jul. 31, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Business Combination [Line Items]            
Proceeds from purchase price adjustment         $ 6,471 $ 0
Fiber-To-The-Home            
Business Combination [Line Items]            
Aggregate purchase price $ 5,000          
Property, plant and equipment assets 3,900          
Definite-lived intangible assets 600          
Goodwill $ 500          
Horizon Transaction            
Business Combination [Line Items]            
Aggregate purchase price   $ 416,200        
Cash consideration   349,400        
Value of shares issued   $ 71,800        
Equity interest issued (in shares)   4,100,375        
Proceeds from purchase price adjustment     $ 6,500      
Integration and acquisition costs       $ 1,700 $ 600 13,600
Operating revenues           258,500
Loss before income taxes           $ (34,900)