Derivative Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended	3 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended		0 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Interest rate cap	Jun. 30, 2013 Interest rate cap J P Morgan	Jun. 30, 2012 Interest rate cap J P Morgan	Jun. 30, 2013 Interest rate cap J P Morgan	Jun. 30, 2012 Interest rate cap J P Morgan	Dec. 31, 2012 Interest rate cap J P Morgan	Dec. 08, 2011 Interest rate cap J P Morgan	Jun. 30, 2013 Green Bay Option	Jun. 30, 2013 Green Bay Option	Dec. 31, 2012 Green Bay Option	Apr. 10, 2009 Green Bay Option Clear Channel and the Company Market
Derivatives, Fair Value [Line Items]
Interest rate cap aggregate notional amount						$ 71,300,000						$ 71,300,000
LIBOR-based variable interest rate component of long-term debt							3.00%		3.00%			3.00%
Long-term assets attributable to the fair value of the interest rate cap							100,000		100,000		100,000
Interest expense							100,000	200,000	100,000	300,000
Swap agreement, Date of maturity						Dec. 08, 2015
Number of Green Bay radio stations to be purchased due to Clear channel's Put option																5
Monthly fee for operation																200,000
Term of payment																5 years
Put option amount																17,600,000
Other current liabilities	(8,542,000)		(8,542,000)		(11,386,000)								(8,500,000)	(8,500,000)	(11,400,000)
Amount of Expense (Income) Recognized on Derivatives	$ (2,138,000)	$ 1,006,000	$ (2,871,000)	$ 1,003,000									$ (2,100,000)	$ (2,800,000)