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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]    
Non-amortizing intangibles $ 76,597 $ 78,314
Gross carrying amount 28,913 35,699
Accumulated amortization and other (27,239) (27,426)
Total 1,674 8,273
Total intangible assets, gross carrying amount 108,754 117,257
Intangible assets, net 81,515 89,831
Broadband    
Finite-Lived Intangible Assets [Line Items]    
Goodwill, gross 3,244 3,244
Goodwill 3,244 3,244
FCC spectrum licenses    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 0 6,811
Accumulated amortization and other 0 (672)
Total 0 6,139
Subscriber relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 28,425 28,425
Accumulated amortization and other (26,910) (26,451)
Total 1,515 1,974
Other intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 488 463
Accumulated amortization and other (329) (303)
Total 159 160
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 13,839
Railroad crossing rights    
Finite-Lived Intangible Assets [Line Items]    
Non-amortizing intangibles $ 141 $ 141