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GOODWILL AND INTANGIBLE ASSETS - Change In Carrying Amount Of Telecommunications Licenses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Changes in the carrying amount of the company's telecommunications licenses, by operating segment |  |  |
Balance at the beginning of the period | $ 93,686 |  |
Balance at the end of the period | 93,686 | $ 93,686 |
Telecommunications Licenses |  |  |
Telecommunications licenses |  |  |
Impairment of intangible assets |  | 0 | $ 0
Changes in the carrying amount of the company's telecommunications licenses, by operating segment |  |  |
Balance at the beginning of the period | 93,686 | 95,952 |
Acquired licenses | 0 | 485 |
Dispositions | 0 | (2,751) |
Balance at the end of the period | 93,686 | 93,686 | 95,952
Telecommunications Licenses | International Telecom |  |  |
Changes in the carrying amount of the company's telecommunications licenses, by operating segment |  |  |
Balance at the beginning of the period | 23,347 | 23,347 |
Acquired licenses | 0 | 0 |
Dispositions | 0 |  |
Balance at the end of the period | 23,347 | 23,347 | 23,347
Telecommunications Licenses | US Telecom |  |  |
Changes in the carrying amount of the company's telecommunications licenses, by operating segment |  |  |
Balance at the beginning of the period | 70,339 | 72,605 |
Acquired licenses | 0 | 485 |
Dispositions | 0 | (2,751) |
Balance at the end of the period | $ 70,339 | $ 70,339 | $ 72,605

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- Definition Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the capitalized costs to acquire rights under a license arrangement (for example, to sell specified products in a specified territory) having an indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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