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GOODWILL AND INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2016
GOODWILL AND INTANGIBLE ASSETS |
Schedule of changes in the carrying amount of goodwill, by operating segment | There were no changes to the Company’s goodwill balances from January 1, 2014 through December 31, 2015 (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 |  |  | (7,491) |  |  | — |  |  | — |  |  | (7,491) |
Balance at December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Gross |  |  | 42,759 |  |  | 24,326 |  |  | 3,279 |  |  | 70,364 |
Accumulated Impairment |  |  | (7,491) |  |  | — |  |  | — |  |  | (7,491) |
Net |  | $ | 35,268 |  | $ | 24,326 |  | $ | 3,279 |  | $ | 62,873 |
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, 2016 were as follows (in thousands):
|  | U.S. |  | Int'l |  |  |  |
|  | Telecom |  | Telecom |  | Consolidated |
Balance at December 31, 2014 |  | $ | 24,944 |  | $ | 19,146 |  | $ | 44,090 |
Amortization |  |  | — |  |  | (622) |  |  | (622) |
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 |
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 |
2017 |  | $ | 3,281 |
2018 |  |  | 2,411 |
2019 |  |  | 1,897 |
2020 |  |  | 1,528 |
2021 |  |  | 1,300 |
Thereafter |  |  | 4,612 |
Total |  | $ | 15,029 |

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