Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Non-amortizing intangibles	$ 76,597	$ 76,597
Gross carrying amount	28,913	28,913
Accumulated amortization and other	(27,484)	(27,239)
Total	1,429	1,674
Total intangible assets, gross carrying amount	108,754	108,754
Intangible assets, net	81,270	81,515
Subscriber relationships
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	28,425	28,425
Accumulated amortization and other	(27,140)	(26,910)
Total	1,285	1,515
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	488	488
Accumulated amortization and other	(344)	(329)
Total	144	159
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
Finite-Lived Intangible Assets [Line Items]
Non-amortizing intangibles	141	141
Goodwill - Broadband
Finite-Lived Intangible Assets [Line Items]
Goodwill, gross	3,244	3,244
Goodwill	$ 3,244	$ 3,244