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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Non-amortizing intangibles $ 76,982 $ 76,673
Gross carrying amount 42,958 28,935
Accumulated amortization and other (28,799) (27,729)
Total 14,159 1,206
Total intangible assets, gross carrying amount 191,621 108,852
Intangible assets, net 162,822 81,123
Subscriber relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 42,448 28,425
Accumulated amortization and other (28,417) (27,370)
Total 14,031 1,055
Other intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 510 510
Accumulated amortization and other (382) (359)
Total 128 151
Cable franchise rights    
Finite-Lived Intangible Assets [Line Items]    
Non-amortizing intangibles 64,334 64,334
FCC Spectrum licenses    
Finite-Lived Intangible Assets [Line Items]    
Non-amortizing intangibles 12,122 12,122
Railroad crossing rights and other    
Finite-Lived Intangible Assets [Line Items]    
Non-amortizing intangibles 526 217
Goodwill    
Finite-Lived Intangible Assets [Line Items]    
Goodwill, gross 71,681 3,244
Goodwill $ 71,681 $ 3,244