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GOODWILL AND INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2014
GOODWILL AND INTANGIBLE ASSETS |
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, 2014 were as follows (in thousands):
|  | U.S. Wireless |  | U.S. Wireline |  | Island Wireless |  | Consolidated |
Balance at December 31, 2012 |  | $ | 20,106 |  | $ | 31 |  | $ | 19,768 |  | $ | 39,905 |
Acquired licenses |  |  | 186 |  |  | — |  |  | — |  |  | 186 |
Licenses sold |  |  | (404 | ) |  | — |  |  | — |  |  | (404 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2013 |  |  | 19,888 |  |  | 31 |  |  | 19,768 |  |  | 39,687 |
Acquired licenses |  |  | 5,025 |  |  | — |  |  | — |  |  | 5,025 |
Amortization |  |  | — |  |  | — |  |  | (622 | ) |  | (622 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2014 |  |  | 24,913 |  |  | 31 |  |  | 19,146 |  |  | 44,090 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of future amortization of customer relationships, in Island Wireless segment | Future amortization of customer relationships, in our Island Wireless segment, is as follows (in thousands):
|  | Future Amortization |
2015 |  | $ | 343 |
2016 |  |  | 309 |
2017 |  |  | 276 |
2018 |  |  | 200 |
2019 |  |  | 145 |
Thereafter |  |  | 223 |
​ | ​ | ​ | ​ | ​
Total |  | $ | 1,496 |
​ | ​ | ​ | ​ | ​

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance and exist in perpetuity, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b),(d) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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