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ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES - Acquisition of Nextel (Details) $ in Thousands | Oct. 01, 2015 USD ($) | Sep. 14, 2015 USD ($) | Dec. 31, 2018 $ / shares | Dec. 31, 2017 $ / shares | Dec. 31, 2016 $ / shares | Dec. 28, 2016 item Vote $ / shares | Jun. 30, 2016 ARS ($) Vote $ / shares | Jan. 27, 2016 | Oct. 07, 2015 USD ($) | Sep. 10, 2015 USD ($)
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ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES |  |  |  |  |  |  |  |  |  |
Nominal value (in pesos per share) | $ / shares |  |  | $ 1 | $ 10,000 | $ 10,000 |  |  |  |  |
Cablevision Holding S.A. |  |  |  |  |  |  |  |  |  |
ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES |  |  |  |  |  |  |  |  |  |
Acquisition percentage |  |  |  | 100.00% |  |  |  |  |  |
Nominal value (in pesos per share) | $ / shares |  |  |  | $ 10,000 | $ 10,000 |  |  |  |  |
Cablevision Holding S.A. | Pem |  |  |  |  |  |  |  |  |  |
ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES |  |  |  |  |  |  |  |  |  |
Shares issued or transferred (in shares) | item |  |  |  |  |  | 1,000,000 |  |  |  |
Nominal value (in pesos per share) | $ / shares |  |  |  |  |  | $ 1 |  |  |  |
Number of vote per membership interest | Vote |  |  |  |  |  | 1 |  |  |  |
Membership interest of capital stock (as a percent) |  |  |  |  |  | 0.10% |  |  |  |
Cablevision Holding S.A. | Nextel |  |  |  |  |  |  |  |  |  |
ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES |  |  |  |  |  |  |  |  |  |
Acquisition percentage |  |  |  |  |  |  |  | 51.40% |  | 49.00%
Total purchase price |  |  |  |  |  |  |  |  |  | $ 80,000
Shares issued or transferred (in shares) |  |  |  |  |  | 810,236,480 | 809,236,480 |  |  |
Nominal value (in pesos per share) | $ / shares |  |  |  |  |  | $ 1 | $ 1 |  |  |
Number of vote per membership interest | Vote |  |  |  |  |  | 1 | 1 |  |  |
Membership interest of capital stock (as a percent) |  |  |  |  |  | 100.00% | 99.90% |  |  |
Cablevision Holding S.A. | Television Dirigida S.A. |  |  |  |  |  |  |  |  |  |
ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES |  |  |  |  |  |  |  |  |  |
Acquisition percentage |  |  |  |  |  |  |  | 48.60% |  | 51.00%
Total purchase price |  |  |  |  |  |  |  |  |  | $ 85,000
Shares issued or transferred (in shares) |  |  |  |  |  |  | 392,774,929 |  |  |
Nominal value (in pesos per share) | $ / shares |  |  |  |  |  |  | $ 1 |  |  |
Membership interest of capital stock (as a percent) |  |  |  |  |  |  | 48.50% |  |  |
Cablevision Holding S.A. | Television Dirigida S.A. | Pem |  |  |  |  |  |  |  |  |  |
ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES |  |  |  |  |  |  |  |  |  |
Shares issued or transferred (in shares) |  |  |  |  |  |  | 1,000,000 |  |  |
Nominal value (in pesos per share) | $ / shares |  |  |  |  |  |  | $ 1 |  |  |
Number of vote per membership interest | Vote |  |  |  |  |  |  | 1 |  |  |
Membership interest of capital stock (as a percent) |  |  |  |  |  |  | 0.10% |  |  |
Cablevision Holding S.A. | Nextel and Subsidiary Television Dirigida S.A. |  |  |  |  |  |  |  |  |  |
ACQUISITION OF COMPANIES AND CORPORATE REORGANIZATION PROCESSES |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  |  |  | 165,000
Additional amount |  |  |  |  |  |  |  |  |  | $ 13,000
Payment of purchase consideration |  | $ 159,000 |  |  |  |  |  |  |  |
Guarantee fund to cover potential liabilities |  |  |  |  |  |  |  |  | $ 6,000 |
Payment of additional consideration | $ 12,730 |  |  |  |  |  |  |  |  |

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