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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Non-amortizing intangibles | $ 76,636 | $ 76,597
Gross carrying amount | 28,913 | 28,913
Accumulated amortization and other | (27,606) | (27,239)
Total | 1,307 | 1,674
Total intangible assets, gross carrying amount | 108,793 | 108,754
Intangible assets, net | 81,187 | 81,515
Subscriber relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 28,425 | 28,425
Accumulated amortization and other | (27,255) | (26,910)
Total | 1,170 | 1,515
Other intangibles |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amount | 488 | 488
Accumulated amortization and other | (351) | (329)
Total | 137 | 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 | 180 | 141
Goodwill - Broadband |  |
Finite-Lived Intangible Assets [Line Items] |  |
Goodwill, gross | 3,244 | 3,244
Goodwill | $ 3,244 | $ 3,244

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