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GOODWILL AND INTANGIBLE ASSETS - Customer Relationships (Details) - International Telecom - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Finite-lived intangible assets |  |  |
Other intangible assets |  | $ 4,500 |
Customer relationships |  |  |
Finite-lived intangible assets |  |  |
Amortization | $ 1,800 | 2,400 | $ 3,200
Future Amortization |  |  |
2020 | 1,528 |  |
2021 | 1,300 |  |
2022 | 1,143 |  |
2023 | 827 |  |
2024 | 576 |  |
Thereafter | 2,067 |  |
Total | $ 7,441 |  |
Franchise Rights |  |  |
Finite-lived intangible assets |  |  |
Other intangible assets |  | 3,000 |
Trade names |  |  |
Finite-lived intangible assets |  |  |
Other intangible assets |  | $ 1,500 |

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