ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Revenue	$ 111,055	$ 110,730	$ 331,075	$ 325,557
Radio Advertising [Member]
Net Revenue	50,813	51,293	144,958	144,358
Political Advertising [Member]
Net Revenue	300	917	741	2,300
Digital Advertising [Member]
Net Revenue	8,171	8,734	23,270	23,439
Cable Television Advertising [Member]
Net Revenue	20,649	19,157	60,658	56,211
Cable Television Affiliate Fees [Member]
Net Revenue	25,330	26,244	79,404	81,513
Event Revenues & Other [Member]
Net Revenue	$ 5,792	$ 4,385	$ 22,044	$ 17,736