Acquisitions and Dispositions - Additional Information (Detail) (USD $)	1 Months Ended	9 Months Ended	12 Months Ended										0 Months Ended				1 Months Ended	12 Months Ended	1 Months Ended				5 Months Ended	12 Months Ended				1 Months Ended		1 Months Ended		0 Months Ended	3 Months Ended	12 Months Ended		0 Months Ended		0 Months Ended
	Sep. 16, 2011	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Sep. 25, 2012	Aug. 01, 2012	May 13, 2011	Sep. 16, 2011 First Lien Facility	Sep. 16, 2011 Second Lien Facility	Sep. 16, 2011 Crestview	Dec. 31, 2012 Class A Common Stock	Dec. 31, 2011 Class A Common Stock	Sep. 16, 2011 Class A Common Stock Warrant	Sep. 16, 2011 Series A preferred stock Macquarie	Dec. 31, 2012 Class B Common Stock	Dec. 31, 2011 Class B Common Stock	Jul. 31, 2012 Townsquare Media, LLC Entity	Dec. 31, 2012 Townsquare Media, LLC	Feb. 18, 2011 Clear Channel Communications, Inc. Entity	Sep. 16, 2011 CMP Acquisition	Sep. 16, 2011 CMP Acquisition	Aug. 01, 2011 CMP Acquisition	Dec. 31, 2011 CMP Acquisition	Dec. 31, 2012 CMP Acquisition	Dec. 31, 2011 CMP Acquisition	Aug. 01, 2011 CMP Acquisition Radio Holdings	Aug. 01, 2011 CMP Acquisition San Francisco Baseball Associates L.P.	Aug. 01, 2011 CMP Acquisition Class A Common Stock Blackstone	Aug. 01, 2011 CMP Acquisition Common Class D	Aug. 01, 2011 CMP Acquisition Common Class D Bain Capital Partners, LLC	Aug. 01, 2011 CMP Acquisition Class B Common Stock	Sep. 16, 2011 Citadel Acquisition	Dec. 31, 2011 Citadel Acquisition	Dec. 31, 2011 Citadel Acquisition	May 31, 2012 Citadel Acquisition	Sep. 16, 2011 Citadel Acquisition Warrant	Sep. 16, 2011 Citadel Acquisition First Lien Facility	Sep. 16, 2011 Citadel Acquisition Second Lien Facility	Sep. 16, 2011 Citadel Acquisition Warrants Held For Future Issuance	Sep. 16, 2011 Citadel Acquisition Class A Common Stock	Sep. 16, 2011 Citadel Acquisition Restricted Shares	Sep. 16, 2011 Ubs	Sep. 16, 2011 Ubs Class A Common Stock	Dec. 31, 2012 KCHZ Acquisition	Dec. 06, 2012 KCHZ Acquisition	Jan. 28, 2013 KMJK Acquisition Subsequent Event
Business Acquisition [Line Items]
Disposal of stations																	55		2
Number of radio stations acquired																	10
Acquisition purchase price paid in cash																	$ 114,900,000																							$ 1,400,000,000					$ 10,000,000
Gain on exchange of assets			63,000,000															63,200,000
Acquisition cost related to corporate, general and administrative expenses																		1,600,000							1,900,000									57,700,000
Future market revenue growth rates for residual year			2.00%																					2.00%
Weighted average cost of capital			10.00%																					10.50%
Acquired entity purchase price				17,394,000	16,800,000																																							11,166	11,200,000	5,600,000
Acquisition purchase price payable																																													1,200,000
Number of acquisitions of stations in 2011																			8
Fair value of assets acquired																			17,400,000
Acquisition costs																			300,000
Fair value allocated to goodwill			756,600,000																4,300,000					402,600,000
Gain on asset exchange				15,278,000
Equity interest percentage																						75.00%
Equity interest previously owned																						25.00%
Stock issued to affiliates	22,700,000												51,800,000	125,000.0								9,900,000						3,300,000		3,300,000						47,600,000			2,400,000	23,600,000	900,000		4,700,000
Common stock, par value											$ 0.01	$ 0.01			$ 0.01	$ 0.01													$ 0.01		$ 0.01
Warrants to purchase shares of common stock										7,800,000																3,700,000
Shares issuable upon exercise of CMP warrants						8,300,000																8,300,000
Revenue																							75,900,000										212,400,000
Fair value of interest																											9,800,000
Gain on fair value measurement on the equity investment																						11,600,000
Difference in Fair Value and Carrying Value																						0
Dividends paid																				500,000	500,000
Series A cumulative redeemable preferred stock			71,869,000	113,447,000																41,600,000	41,600,000
Aggregate acquisition value	2,320,241,000																															2,320,241,000
Purchase of exercisable warrants																																										24,100,000
Amount of outstanding debt paid																																1,400,000,000						790,000,000
Total term loan and revolving credit facilities								1,325,000,000	790,000,000																												1,325,000,000
Term loan and revolving credit facilities																																200,000,000
Proceeds from the sale of common stock, preferred stock and warrants to purchase common stock to certain investors																																475,000,000
Senior Notes issued							610,000,000																												610,000,000
Percentage of Senior notes		7.75%		7.75%
Goodwill purchase accounting adjustments related to fair value adjustments of broadcast licenses, current assets			$ 9,800,000