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Goodwill and Intangible Assets | 6 Months Ended
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Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets Other intangible assets consisted of the following:
| June 30, 2021 |  | December 31, 2020
(in thousands) | Gross Carrying Amount |  | Accumulated Amortization and Other |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization and Other |  | Net
Goodwill - Broadband | $ | 3,244 |  |  | $ | — |  |  | $ | 3,244 |  |  | $ | 3,244 |  |  | $ | — |  |  | $ | 3,244 |
Indefinite-lived intangibles: |  |  |  |  |  |  |  |  |  |  |
Cable franchise rights | $ | 64,334 |  |  | $ | — |  |  | $ | 64,334 |  |  | $ | 64,334 |  |  | $ | — |  |  | $ | 64,334 |
FCC spectrum licenses | 29,958 |  |  | — |  |  | 29,958 |  |  | 29,958 |  |  | — |  |  | 29,958 |
Railroad crossing rights | 141 |  |  | — |  |  | 141 |  |  | 141 |  |  | — |  |  | 141 |
Total indefinite-lived intangibles | 94,433 |  |  | — |  |  | 94,433 |  |  | 94,433 |  |  | — |  |  | 94,433 |
Finite-lived intangibles: |  |  |  |  |  |  |  |  |  |  |
FCC spectrum licenses | 6,811 |  |  | (515) |  |  | 6,296 |  |  | 6,811 |  |  | (340) |  |  | 6,471 |
Subscriber relationships | 28,425 |  |  | (26,226) |  |  | 2,199 |  |  | 28,425 |  |  | (26,000) |  |  | 2,425 |
Other intangibles | 463 |  |  | (290) |  |  | 173 |  |  | 463 |  |  | (277) |  |  | 186 |
Total finite-lived intangibles | 35,699 |  |  | (27,031) |  |  | 8,668 |  |  | 35,699 |  |  | (26,617) |  |  | 9,082 |
Total goodwill and intangible assets | $ | 133,376 |  |  | $ | (27,031) |  |  | $ | 106,345 |  |  | $ | 133,376 |  |  | $ | (26,617) |  |  | $ | 106,759 |
For the six months ended June 30, 2021 and 2020, amortization expense was approximately $0.4 million and $0.3 million, respectively.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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