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BASIS OF PRESENTATION - Schedule of Trade and Barter Revenues and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Trade and barter revenues	$ 57,285	$ 60,105
Trade and barter expenses	66,281	56,067
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Segment Reporting Information [Line Items]
Trade and barter revenues	53,946	56,096
Trade and barter expenses	$ 61,561	$ 52,287

X

- Definition

Total expense recognized from advertising barter transactions for each income statement presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68051663&loc=d3e49171-111630

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X

- Definition

Total revenue recognized from advertising barter transactions for each income statement presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68051663&loc=d3e49171-111630

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- Definition

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.

+ References

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