GOODWILL, RADIO BROADCASTING LICENSES AND OTHER INTANGIBLE ASSETS: (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2012
Goodwill Carrying Balance, as of December 31, 2011	$ 272,037,000
Goodwill, Period Increase (Decrease)	0
Goodwill Carrying Balances, as of December 31, 2012	272,037,000
Radio Broadcasting Segment [Member]
Goodwill Carrying Balance, as of December 31, 2011	70,800,000
Goodwill, Period Increase (Decrease)	0
Goodwill Carrying Balances, as of December 31, 2012	70,800,000
Reach Media Segment [Member]
Goodwill Carrying Balance, as of December 31, 2011	14,400,000
Goodwill, Period Increase (Decrease)	0
Goodwill Carrying Balances, as of December 31, 2012	14,400,000
Internet Segment [Member]
Goodwill Carrying Balance, as of December 31, 2011	21,800,000
Goodwill, Period Increase (Decrease)	0
Goodwill Carrying Balances, as of December 31, 2012	21,800,000
Cable Television Segment [Member]
Goodwill Carrying Balance, as of December 31, 2011	165,000,000
Goodwill, Period Increase (Decrease)	0
Goodwill Carrying Balances, as of December 31, 2012	$ 165,000,000