Derivative Financial Instruments - Additional Information (Detail) (USD $)		12 Months Ended				1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 May 2005 Option Bank of America	Dec. 31, 2011 May 2005 Option Bank of America	Dec. 31, 2010 May 2005 Option Bank of America	Dec. 08, 2011 Interest Rate Cap	Dec. 08, 2011 Interest Rate Cap J P Morgan	Dec. 31, 2012 Interest Rate Cap J P Morgan	Dec. 31, 2011 Interest Rate Cap J P Morgan	Dec. 31, 2012 Green Bay Option	Dec. 31, 2011 Green Bay Option	Dec. 31, 2012 Green Bay Option Clear Channel and the Company	Apr. 10, 2009 Green Bay Option Clear Channel and the Company Segment
Derivatives, Fair Value [Line Items]
Interest expense		$ 0	$ 3,700,000	$ 12,000,000			$ (300,000)	$ (100,000)
Expiry date of May 2005 option		Mar. 31, 2011
Interest rate cap aggregate notional amount					71,300,000	71,300,000
LIBOR-based variable interest rate component of long-term debt						3.00%
Long-term assets attributable to the fair value of the interest rate cap							0	400,000
Swap agreement, Date of maturity						Dec. 08, 2015
Monthly fee for operation												200,000
Number of Green Bay radio stations to be purchased due to Clear channel's Put option												5
Term of payment												5 years
Put option amount												17,600,000
LMA expiration date											Dec. 31, 2013
Date of inception of purchase											Jul. 01, 2013
Duration of swap agreement											2 months
Other long term liabilities										11,400,000
Other current liabilities	11,386,000								11,400,000
Realized loss on derivative instruments associated with marking to market the Green Bay Option									$ 0	$ 3,400,000