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GOODWILL AND INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2017
GOODWILL AND INTANGIBLE ASSETS |
Schedule of finite lived intangible assets, by operating segment | The table below disclosed goodwill recorded in each of the Company’s segments and accumulated impairment changes (in thousands):
|  | U.S. |  | International |  | Renewable |  |  |  |
|  | Telecom |  | Telecom |  | Energy |  | Consolidated |
Balance at December 31, 2015 |  | $ | 39,639 |  | $ | 5,438 |  | $ | — |  | $ | 45,077 |
Acquisitions |  |  | 3,121 |  |  | 20,586 |  |  | 3,279 |  |  | 26,986 |
Deconsolidation of Subsidiary |  |  | — |  |  | (1,698) |  |  | — |  |  | (1,698) |
Impairment |  |  | (7,492) |  |  | — |  |  | — |  |  | (7,492) |
Balance at December 31, 2016 |  |  | 35,268 |  |  | 24,326 |  |  | 3,279 |  |  | 62,873 |
Acquisitions |  |  | — |  |  | 1,097 |  |  | — |  |  | 1,097 |
Balance at December 31, 2017 |  | $ | 35,268 |  | $ | 25,423 |  | $ | 3,279 |  | $ | 63,970 |
|  | U.S. |  | International |  | Renewable |  |  |  |
|  | Telecom |  | Telecom |  | Energy |  | Consolidated |
Balance at December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Gross |  | $ | 42,760 |  | $ | 24,326 |  | $ | 3,279 |  | $ | 70,365 |
Accumulated Impairment (1) |  |  | (7,492) |  |  | — |  |  | — |  |  | (7,492) |
Net |  |  | 35,268 |  |  | 24,326 |  |  | 3,279 |  |  | 62,873 |
Balance at December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Gross |  |  | 35,268 |  |  | 25,423 |  |  | 3,279 |  |  | 63,970 |
Accumulated Impairment (1) |  |  | — |  |  | — |  |  | — |  |  | — |
Net |  | $ | 35,268 |  | $ | 25,423 |  | $ | 3,279 |  | $ | 63,970 |
(1) The Company recorded an impairment charge in 2016 related to its U.S. Wireline business. The sale of that business was completed 2017.
Schedule of changes in the carrying amount of the Company's telecommunications licenses, by operating segment | The changes in the carrying amount of the Company’s telecommunications licenses, by operating segment, for the three years ended December 31, 2017 were as follows (in thousands):
|  | U.S. |  | Int'l |  |  |  |
|  | Telecom |  | Telecom |  | Consolidated |
Balance at December 31, 2015 |  | $ | 24,944 |  | $ | 18,524 |  | $ | 43,468 |
Deconsolidation of subsidiary |  |  | — |  |  | (2,178) |  |  | (2,178) |
Acquired licenses |  |  | — |  |  | 7,623 |  |  | 7,623 |
Amortization |  |  | — |  |  | (622) |  |  | (622) |
Balance at December 31, 2016 |  | $ | 24,944 |  | $ | 23,347 |  | $ | 48,291 |
Acquired licenses |  |  | 47,692 |  |  | — |  |  | 47,692 |
Dispositions |  |  | (31) |  |  | — |  |  | (31) |
Balance at December 31, 2017 |  | $ | 72,605 |  | $ | 23,347 |  | $ | 95,952 |
Schedule of future amortization of customer relationships, in Island Wireless segment | Future amortization of customer relationships, in our International Telecom segment, is as follows (in thousands):
|  | Future Amortization |
2018 |  | $ | 2,411 |
2019 |  |  | 1,897 |
2020 |  |  | 1,528 |
2021 |  |  | 1,300 |
2022 |  |  | 1,143 |
Thereafter |  |  | 3,455 |
Total |  | $ | 11,734 |

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