STOCKHOLDERS' EQUITY: (Details Textual) (USD $)	12 Months Ended				1 Months Ended		1 Months Ended						12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Repurchase Program 2011 [Member]	Dec. 31, 2010 Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2009 Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2009 Chief Executive Officer [Member] Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2009 Board Of Directors Chairman [Member] Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2009 Chief Financial Officer [Member] Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2009 Chief Operating Officer [Member] Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2009 Former President Of Radio Division [Member] Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2009 Other Key Employees [Member] Stock Plan LTIP Shares 2009 [Member]	Dec. 31, 2011 Common Class A [Member]	Dec. 31, 2012 Common Class A [Member] Stock Option and Restricted Stock Grant Plan 1999 [Member]	Dec. 31, 2011 Common Class D [Member]	Dec. 31, 2012 Common Class D [Member] Stock Option and Restricted Stock Grant Plan 1999 [Member]	Dec. 31, 2012 Common Class D [Member] Stock Plan 2009 [Member]
Stock Repurchase Program, Authorized Amount				$ 15,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized						3,250,000								1,408,099		10,816,198	8,250,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																	4,724,272
Stock Issued During Period, Shares, Restricted Stock Award, Gross							1,000,000	300,000	225,000	225,000	130,000	1,370,000
Percentage Of Restricted Stock Award Vested During Period					33.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	151,000	182,000	39,000
Share-Based Compensation Arrangement By Share-Based Payment Award Options Vested In Period	95,064
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	112,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	10 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 0.73	$ 1.38	$ 2.45
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options	59,000
Repurchase Of Common Stock Shares													54,566		4,245,567
Repurchase of shares of common stock		73,000
Repurchase of shares of Class D common stock		$ 9,401,000
Repurchase Of Common Stock Price Per Share													$ 1.34		$ 2.21
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value1	$ 3.23