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Acquisitions and Recent Transactions - Additional Information (Detail) (USD $)
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0 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | |||||||||
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Mar. 06, 2014
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Jan. 10, 2014
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Mar. 14, 2013
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Dec. 10, 2013
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Mar. 31, 2014
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Mar. 31, 2013
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Dec. 31, 2013
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Mar. 31, 2014
Term Loan B
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Feb. 28, 2014
WOLT-FM in Greenville, South Carolina
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Nov. 13, 2013
Transmitter site
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Mar. 31, 2014
KDIS-FM, Little Rock Arkansas and KRDY-AM, San Antonio, Texas (business acquisition)
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Feb. 07, 2014
KDIS-FM, Little Rock Arkansas and KRDY-AM, San Antonio, Texas (business acquisition)
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Jan. 10, 2014
Eagle Publishing (business acquisition)
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Mar. 31, 2014
Eagle Publishing (business acquisition)
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Mar. 31, 2014
Eagle Publishing (business acquisition)
January 2015
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Jan. 10, 2014
Eagle Publishing (business acquisition)
January 2015
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Jan. 10, 2014
Eagle Publishing (business acquisition)
January 2016
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Mar. 31, 2014
Eagle Publishing (business acquisition)
January 2016
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Mar. 31, 2014
Purchase of various intangible Internet assets (asset purchases)
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| Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | |||||||||||||||||||
| Debt, issuance of principal amount | $ 300,000,000 | ||||||||||||||||||
| Repayment of Term Loan B | 2,300,000 | ||||||||||||||||||
| Pre-tax loss on the early retirement of debt | 33,000 | 8,000 | 27,721,000 | 8,000 | |||||||||||||||
| Class A and Class B common stock, dividend declared date | Mar. 06, 2014 | ||||||||||||||||||
| Class A and Class B common stock, dividend declared per share | $ 0.0575 | ||||||||||||||||||
| Class A and Class B common stock, dividend paid | 1,400,000 | 1,444,000 | 1,234,000 | ||||||||||||||||
| Class A and Class B common stock, payment date | Mar. 31, 2014 | ||||||||||||||||||
| Class A and Class B common stock, record date | Mar. 17, 2014 | ||||||||||||||||||
| Business acquisition purchase price | 12,785,000 | 1,100,000 | 2,200,000 | 1,984,000 | 10,628,000 | 200,000 | |||||||||||||
| Acquisition date | Feb. 07, 2014 | Jan. 10, 2014 | |||||||||||||||||
| Goodwill | 24,709,000 | 22,374,000 | 18,000 | ||||||||||||||||
| Purchase price | 8,500,000 | ||||||||||||||||||
| Amount due on close of Transaction | 5,957,000 | 3,500,000 | |||||||||||||||||
| Deferred amount payable | 2,500,000 | 2,500,000 | |||||||||||||||||
| Acquisition payment date | 2015-01 | 2016-01 | |||||||||||||||||
| Additional costs associate associated with liabilities incurred by the seller | 400,000 | ||||||||||||||||||
| Deferred payments, present value | 2,400,000 | 2,300,000 | |||||||||||||||||
| Contingent earn-out consideration | 8,500,000 | ||||||||||||||||||
| Contingent earn-out consideration achievement of milestone period | 3 years | ||||||||||||||||||
| Estimated fair value of contingent earn-out consideration | 2,000,000 | 600,000 | 2,000,000 | ||||||||||||||||
| Contingent earn-out consideration period | 3 years | 2 years | 1 year 9 months | ||||||||||||||||
| Goodwill | $ 2,300,000 | $ 2,335,000 | |||||||||||||||||
| Business acquisition, APA date | Feb. 28, 2014 | ||||||||||||||||||
| Business acquisition closed date | May 06, 2014 | ||||||||||||||||||
| Business acquisition expected to closing date | Dec. 31, 2014 | ||||||||||||||||||