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CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS (Detail) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 02, 2015 | Jan. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 03, 2015 | Dec. 31, 2014 | Aug. 09, 2010
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Management fees rate |  |  | $ 15,000,000.0 |  |  |  |  |
Management fees and reimbursable expenses |  |  | $ 15,200,000 | $ 15,300,000 | $ 15,400,000 |  |  |
Common Class A |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Approved stock repurchase amount |  |  |  |  |  |  |  | $ 100,000,000.0
Remaining aggregate available under stock purchase program |  |  |  |  |  |  | $ 34,200,000 |
CC Finco | Common Class A |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Shares purchased (in shares) |  | 2,000,000 |  |  |  |  |  |
Shares purchased | $ 22,200,000 | $ 20,400,000 |  |  |  |  |  |
Additional shares purchased | 2,172,946 |  |  |  |  |  |  |
iHeart Communications Inc. | Common Class A |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Shares of CCOH's Class A Common Stock held (in shares) |  |  | 10,726,917 |  |  |  |  |
Collective holdings percentage (more than) |  |  | 89.50% |  |  |  |  |
CCOH | Common Class B |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |
Contribution of shares by Clear Channel Holdings, Inc. (in shares) |  |  |  |  |  | 100,000,000 |  |

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