ACQUISITIONS AND DISPOSITIONS (Details Textual) - USD ($)		1 Months Ended				3 Months Ended		6 Months Ended
	Apr. 04, 2017	May 02, 2017	Apr. 28, 2017	Apr. 20, 2017	Feb. 03, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Deferred Liabilities Noncurrent						$ 8,100,000		$ 8,100,000
Business Combination, Consideration Transferred	$ 2,000,000
Proceeds from Divestiture of Businesses								25,000,000
Assets Held-for-sale, Not Part of Disposal Group	$ 1,900,000					1,900,000		1,900,000		$ 2,200,000
Sale Leaseback Transaction, Net Proceeds, Investing Activities								25,000,000	$ 0
Sale And Leaseback Transaction Gain								22,500,000
Sale and Leaseback Transaction, Gain (Loss), Net		$ 0				14,411,000	$ 0	$ 14,411,000	$ 0
Sale Lease Back Transaction, Lease Expiration Period								10 years
Goodwill						$ 263,310,000		$ 263,310,000		$ 258,284,000
Wilks [Member] | FM Station [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total					$ 861,000
Business Acquisition Purchase Price Allocation Indefinite Lived Intangible Assets, Radio Broadcasting Licenses					1,500,000
Business Combination, Consideration Transferred					2,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Intangible Assets					84,000
Business Combination Unfavorable Lease Liability					$ 443,000
Red Zebra Broadcasting [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total				$ 206,000
Business Acquisition Purchase Price Allocation Indefinite Lived Intangible Assets, Radio Broadcasting Licenses				1,600,000
Business Acquisition Purchase Price Allocation Indefinite Lived Intangible Assets Including Goodwill				47,000
Business Combination, Consideration Transferred				2,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Intangible Assets				$ 114,000
Moguldom Media Group, LLC. [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total			$ 22,000
Business Combination, Consideration Transferred			5,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Intangible Assets			347,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Brand and Trade Names			915,000
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Customer Relationship			1,200,000
Business Combination, Contingent Consideration, Liability			2,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other			263,000
Goodwill			$ 5,000,000