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GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS - Estimate of Amortization Expense (Details) - Finite-Lived Intangible Assets [Member]
$ in Thousands
Dec. 31, 2019
USD ($)
Schedule of Goodwill, Radio Broadcasting Licenses And Other Intangible Assets [Line Items]  
2020 $ 5,000
2021 4,684
2022 4,637
2023 2,212
2024 $ 1,208