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LONG-TERM DEBT - Legacy Notes (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Nov. 30, 2017
Debt Instrument [Line Items] |  |  |  |
Total Legacy Notes | $ 20,364,988 | $ 20,649,181 | $ 20,364,988 | $ 365,000
iHeart Communications Legacy Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount held by a subsidiary |  |  | 57,100 |
iHeartCommunications | iHeart Communications Legacy Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount held by a subsidiary |  | 57,100 |  |
Legacy Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Total Legacy Notes | $ 475,000 | $ 475,000 | $ 475,000 |
Legacy Notes | 5.5% Senior Notes Due 2016 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.50% | 5.50% | 5.50% |
Legacy Notes | iHeartCommunications | 5.5% Senior Notes Due 2016 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repaid at maturity | $ 192,900 |  |  |
Total Legacy Notes | $ 57,100 | $ 57,100 | $ 57,100 |

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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