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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Non-amortizing intangibles $ 76,982 $ 76,982
Gross carrying amount 42,984 42,957
Accumulated amortization and other (29,746) (29,271)
Total 13,238 13,686
Total intangible assets, gross carrying amount 187,021 186,994
Intangible assets, net 157,275 157,723
Subscriber relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 42,447 42,447
Accumulated amortization and other (29,348) (28,882)
Total 13,099 13,565
Other intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 537 510
Accumulated amortization and other (398) (389)
Total 139 121
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 526 526
Goodwill    
Finite-Lived Intangible Assets [Line Items]    
Goodwill, gross 67,055 67,055
Goodwill, net $ 67,055 $ 67,055