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Acquisitions and Recent Transactions - Additional Information (Detail) (USD $)
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0 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 1 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | ||||||||||||||
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Jan. 10, 2014
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Mar. 14, 2013
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Jan. 10, 2014
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Dec. 31, 2013
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Mar. 06, 2014
First Quarter Dividend
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Jun. 30, 2014
First Quarter Dividend
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May 27, 2014
Second Quarter Dividend
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Jun. 30, 2014
Second Quarter Dividend
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Mar. 31, 2014
Term Loan B
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Jan. 10, 2014
Eagle Publishing (business acquisition)
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Jun. 30, 2014
Eagle Publishing (business acquisition)
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Jan. 10, 2014
Eagle Publishing (business acquisition)
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Jun. 06, 2014
Eagle Publishing (business acquisition)
January 2015
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Jun. 30, 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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Jun. 30, 2014
Eagle Publishing (business acquisition)
January 2016
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Jan. 10, 2014
Eagle Publishing (business acquisition)
January 2016
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Jun. 30, 2014
WRTH-FM (formerly WOLT-FM), Greenville, South Carolina (business acquisition)
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May 06, 2014
WRTH-FM (formerly WOLT-FM), Greenville, South Carolina (business acquisition)
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Jun. 30, 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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Jun. 30, 2014
KXXT-FM in Phoenix, Arizona
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May 29, 2014
KXXT-FM in Phoenix, Arizona
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Jun. 30, 2014
WOCN-AM Miami, Florida (business acquisition)
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May 22, 2014
WOCN-AM Miami, Florida (business acquisition)
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Jun. 30, 2014
Purchase of various intangible Internet assets (asset purchases)
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Jun. 30, 2014
FM Translators, Orlando, Florida, Tampa, Florida, Omaha, Nebraska (asset purchase)
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Apr. 15, 2014
FM Translators, Orlando, Florida, Tampa, Florida, Omaha, Nebraska (asset purchase)
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Apr. 14, 2014
FM Translators, Orlando, Florida, Tampa, Florida, Omaha, Nebraska (asset purchase)
Translator
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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 | 55,000 | 8,000 | 27,776,000 | 8,000 | ||||||||||||||||||||||||||||
| Class A and Class B common stock, dividend declared date | Mar. 06, 2014 | May 27, 2014 | |||||||||||||||||||||||||||||||
| Class A and Class B common stock, dividend declared per share | $ 0.0575 | $ 0.06 | |||||||||||||||||||||||||||||||
| Class A and Class B common stock, dividend paid | 2,958,000 | 2,474,000 | 1,400,000 | 1,500,000 | |||||||||||||||||||||||||||||
| Class A and Class B common stock, payment date | Mar. 31, 2014 | Jun. 30, 2014 | |||||||||||||||||||||||||||||||
| Class A and Class B common stock, record date | Mar. 17, 2014 | Jun. 16, 2014 | |||||||||||||||||||||||||||||||
| Acquisition date | Jan. 10, 2014 | May 06, 2014 | Feb. 07, 2014 | May 22, 2014 | Apr. 14, 2014 | ||||||||||||||||||||||||||||
| Purchase price | 8,500,000 | ||||||||||||||||||||||||||||||||
| Amount due on close of transaction | 10,466,000 | 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 | ||||||||||||||||||||||||||||||||
| Early payment made | 1,500,000 | ||||||||||||||||||||||||||||||||
| Deferred payments, present value | 900,000 | 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 | ||||||||||||||||||||||||||||||||
| Contingent earn-out consideration period | 3 years | 2 years 9 months | |||||||||||||||||||||||||||||||
| Goodwill | 2,353,000 | 2,300,000 | |||||||||||||||||||||||||||||||
| Business acquisition purchase price | 16,740,000 | 10,628,000 | 1,125,000 | 1,984,000 | 600,000 | 2,450,000 | 200,000 | 350,000 | 400,000 | ||||||||||||||||||||||||
| Goodwill | $ 24,727,000 | $ 22,374,000 | $ 6,400,000 | $ 18,000 | $ 12,000,000 | ||||||||||||||||||||||||||||
| Number of FM translators acquired | 3 | ||||||||||||||||||||||||||||||||
| Business acquisition, APA date | May 29, 2014 | ||||||||||||||||||||||||||||||||
| Business acquisition closed date | Dec. 31, 2014 | ||||||||||||||||||||||||||||||||