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COMMITMENTS AND CONTINGENCIES - Narrative (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 16, 2018 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Oct. 09, 2018 | Mar. 26, 2018 | Mar. 21, 2018 | Aug. 14, 2017
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Rent expense charged to operations |  |  |  | $ 1,200,000 | $ 1,100,000 | $ 1,100,000 |  |  |  |
Interest Rate |  | 8.75% |  | 8.75% |  |  |  |  |  |
Other long term liabilities |  | $ (489,829) |  | $ (489,829) | (610,639) |  |  |  |  |
VAT Obligation |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Other long term liabilities |  |  |  |  | $ 16,900 |  |  |  |  |
Ministry of Economic Affairs and Finance, Italy |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Estimate of possible loss |  |  | $ 17,000 |  |  |  |  |  |  |
Payment for income tax examination |  | $ 8,600 |  |  |  |  |  |  |  |
6.875% Senior Notes Due 2018 |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 6.875% |  | 6.875% |
7.25% Senior Notes Due 2027 |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  |  | 7.25% |  | 7.25% |
14.0% Senior Notes Due 2021 |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 14.00% |  | 14.00% | 14.00% |  |  | 14.00% |  |
Chapter 11 Cases | CCOH Separation Settlement |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Loss contingency, loss in period | $ 149,000 |  |  |  |  |  |  |  |  |
Unsecured Revolving Line of Credit Issued To Debtors | CCOH Separation Settlement |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Loss contingency, loss in period | $ 200,000 |  |  |  |  |  |  |  |  |
Senior Notes | 8.75% Senior Notes Due 2020 |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |
Interest Rate |  | 8.75% |  | 8.75% |  |  |  |  |  | 8.75%

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