Acquisitions and Dispositions - Additional Information (Detail) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended	0 Months Ended		12 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Green Bay Station	Dec. 12, 2013 WestwoodOne Station	Dec. 31, 2013 WestwoodOne	Nov. 14, 2013 Townsquare Media, LLC Station Entity	Jul. 31, 2012 Townsquare Media, LLC Station	Dec. 31, 2013 Townsquare Media, LLC	Dec. 31, 2012 Townsquare Media, LLC	Jan. 08, 2013 Wfme Asset Exchange	Dec. 31, 2013 Wfme Asset Exchange	Dec. 31, 2013 Wfme Asset Exchange Maximum	Jan. 17, 2013 Pamal Broadcasting Asset Purchase	Dec. 06, 2012 KCHZ Acquisition	Jan. 28, 2013 KMJK Acquisition	Jul. 31, 2012 2012 Acquisitions	Dec. 06, 2012 Ar Broadcasting Asset Purchase	Sep. 25, 2012 Ar Broadcasting Asset Purchase
Business Acquisition [Line Items]
Number of radio stations purchased				5			5
Total purchase price				$ 17,636,000	$ 260,000,000
Revenue growth rates (percentage)				2.50%	2.00%		2.00%
Discount rate in fair value calculations	10.00%			10.00%	10.00%		10.00%
Number of radio stations					10,000
Total purchase price					45,000,000			114,900,000			40,000,000				10,000,000
Repayments of outstanding debt	2,111,688,000	174,313,000	1,264,676,000		215,000,000
Add: Cash received							235,000,000
Amount deposited into escrow					22,500,000
Revenues attributable to WestwoodOne						10,000,000
Fair value allocated to goodwill																	1,100,000
Number of station sold							53
Number of stations exchanged							15
Fair value of interest											31,000	10,000,000	100,000
Future market revenue growth rates for residual year	2.00%										2.00%
Weighted average cost of capital	10.00%										10.00%
Acquired entity purchase price											40,083,000			6,483,000	11,200,000	6,900,000		18,070,000	16,800,000
Disposal of stations								55
Number of radio stations acquired								10
Revenue									10,300,000	4,700,000
Acquisition purchase price payable															$ 1,200,000