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Acquisitions and Dispositions - Schedule of Assumptions Used in Valuation of FCC Licenses (Detail) - CBS Radio Stations Inc., Entercom Boston LLC and The Entercom Divestiture Trust [Member] | 12 Months Ended
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Dec. 31, 2019
Fair Value Inputs Asset Quantitative Information [Line Items] |
Market revenue shares at maturity | 5.40%
Operating income margins at maturity | 30.50%
Measurement Input, Discount Rate [Member] |
Fair Value Inputs Asset Quantitative Information [Line Items] |
Fair value assumptions inputs rate | 9.00%
Minimum [Member] |
Fair Value Inputs Asset Quantitative Information [Line Items] |
Market revenue shares at maturity | 0.60%
Operating income margins at maturity | 27.50%
Minimum [Member] | Measurement Input, Discount Rate [Member] |
Fair Value Inputs Asset Quantitative Information [Line Items] |
Fair value assumptions inputs rate | 0.60%
Maximum [Member] |
Fair Value Inputs Asset Quantitative Information [Line Items] |
Market revenue shares at maturity | 1.10%
Operating income margins at maturity | 29.80%
Maximum [Member] | Measurement Input, Discount Rate [Member] |
Fair Value Inputs Asset Quantitative Information [Line Items] |
Fair value assumptions inputs rate | 1.30%

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- Details
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