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Significant Transactions - Additional Information (Detail) (USD $)
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1 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended | |||||||||||||||||
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Mar. 31, 2013
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Mar. 14, 2013
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Mar. 31, 2012
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Mar. 31, 2013
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Mar. 31, 2012
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Dec. 31, 2012
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Mar. 14, 2013
9 5/8% Senior Secured Second Lien Notes
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Dec. 12, 2012
9 5/8% Senior Secured Second Lien Notes
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Jun. 01, 2012
9 5/8% Senior Secured Second Lien Notes
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Mar. 31, 2013
9 5/8% Senior Secured Second Lien Notes
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Dec. 31, 2012
9 5/8% Senior Secured Second Lien Notes
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Dec. 12, 2011
9 5/8% Senior Secured Second Lien Notes
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Sep. 06, 2011
9 5/8% Senior Secured Second Lien Notes
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Jun. 01, 2011
9 5/8% Senior Secured Second Lien Notes
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Dec. 01, 2010
9 5/8% Senior Secured Second Lien Notes
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Jun. 01, 2010
9 5/8% Senior Secured Second Lien Notes
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Mar. 31, 2013
Term Loan B
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Mar. 14, 2013
Term Loan B
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Mar. 31, 2013
Revolver
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Mar. 14, 2013
Revolver
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Feb. 15, 2013
WJKR-FM, Columbus, Ohio
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Feb. 05, 2013
WMUU-FM, Greenville, South Carolina
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| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | ||||||||||||||||||||||
| Class A and Class B common stock, dividend declared date | Mar. 18, 2013 | Mar. 07, 2012 | Mar. 18, 2013 | |||||||||||||||||||
| Class A and Class B common stock, dividend declared per share | $ 0.05 | $ 0.035 | $ 0.05 | |||||||||||||||||||
| Class A and Class B common stock, dividend paid | $ 1,234,000 | $ 850,000 | ||||||||||||||||||||
| Class A and Class B common stock, payment date | Apr. 01, 2013 | |||||||||||||||||||||
| Class A and Class B common stock, record date | Mar. 25, 3013 | |||||||||||||||||||||
| Class A and Class B common stock, expected annual dividends | 4,900,000 | 4,900,000 | ||||||||||||||||||||
| senior secured credit facility | 300,000,000 | 300,000,000 | 25,000,000 | |||||||||||||||||||
| Debt, interest rate | 9.625% | 9.625% | ||||||||||||||||||||
| Debt, maturity year | 2016 | 2016 | 2016 | 2016 | ||||||||||||||||||
| Loss on early retirement of long-term debt | 33,000 | (27,721,000) | 26,900,000 | 200,000 | 900,000 | 800,000 | ||||||||||||||||
| Principal repurchased or redeemed | 212,597,000 | 4,000,000 | 17,500,000 | 12,500,000 | 5,000,000 | 17,500,000 | 12,500,000 | 17,500,000 | ||||||||||||||
| Debt, purchase price | 240,300,000 | 4,100,000 | 18,000,000 | |||||||||||||||||||
| Percent of debt purchase price | 110.65% | 103.00% | 103.00% | |||||||||||||||||||
| Amount paid for redemption | 22,700,000 | |||||||||||||||||||||
| Unamortized Discount | 837,000 | 17,000 | 80,000 | 62,000 | 26,000 | 93,000 | 70,000 | 105,000 | ||||||||||||||
| Bond issue costs | 2,867,000 | 57,000 | 287,000 | 337,000 | 135,000 | 472,000 | 334,000 | 417,000 | ||||||||||||||
| Aggregate principal amount outstanding | 306,664,000 | 306,664,000 | 268,980,000 | 899,000 | 212,622,000 | 298,509,000 | 4,000,000 | |||||||||||||||
| Restricted cash | 970,000 | 970,000 | 970,000 | |||||||||||||||||||
| Redemption price percentage | 103.00% | |||||||||||||||||||||
| Business acquisition purchase price | 9,427,000 | 9,427,000 | 4,000,000 | 5,400,000 | ||||||||||||||||||
| Amount due on close of Transaction | 1,000,000 | |||||||||||||||||||||
| Amount payable | 2,000,000 | |||||||||||||||||||||
| Advertising cost | 3,000,000 | |||||||||||||||||||||
| Acquisition payment date | 2014-04 | |||||||||||||||||||||
| Discount on advertising credits | $ 600,000 | |||||||||||||||||||||
| Advertising credits payable term | Ten | |||||||||||||||||||||
| Amortization period of interest expense | 10 years | |||||||||||||||||||||