Amount of gain on sale and leaseback transaction from transfer of asset accounted for as sale.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

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Amount of gain (loss) on sale and leaseback transaction from transfer of asset accounted for as sale.

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The portion of the gain that will be recorded as income or a reduction in rent expense in future periods less amounts recognized in the current period.

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Amount of cash inflow after closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in investing activities.

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ACQUISITIONS AND DISPOSITIONS (Details) - USD ($)				1 Months Ended	3 Months Ended	9 Months Ended
ACQUISITIONS AND DISPOSITIONS (Details) - USD ($)	Feb. 24, 2020	Aug. 31, 2019	May 02, 2017	Jan. 30, 2017	Jun. 30, 2017	Sep. 30, 2020	Sep. 30, 2019
ACQUISITIONS AND DISPOSITIONS
Proceeds from Divestiture of Businesses				$ 25,000,000
Sale Leaseback Transaction, Net Proceeds, Investing Activities			$ 25,000,000
Sale And Leaseback Transaction Gain			$ 22,500,000
Sale and Leaseback Transaction, Gain (Loss), Net					$ 14,400,000
Sale Leaseback Transaction, Deferred Gain, Net					$ 8,100,000
Proceeds from Sale of Property Held-for-sale						$ 0	$ 13,500,000
Detroit radio station [Member]
ACQUISITIONS AND DISPOSITIONS
Proceeds from Sale of Property Held-for-sale		$ 13,500,000
WQMC-LD
ACQUISITIONS AND DISPOSITIONS
Total consideration	$ 475,000