Quarterly report pursuant to Section 13 or 15(d)

Summary of Business Acquisitions and Asset Purchases (Detail)

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Summary of Business Acquisitions and Asset Purchases (Detail) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 9 Months Ended
Jan. 10, 2014
Sep. 30, 2014
Business Acquisition [Line Items]    
Business acquisition, total cost   $ 16,952
WOCN-AM Miami, Florida (business acquisition)
   
Business Acquisition [Line Items]    
Business acquisition, total cost   2,450
Business acquisition, date   May 22, 2014
WRTH-FM (formerly WOLT-FM), Greenville, South Carolina (business acquisition)
   
Business Acquisition [Line Items]    
Business acquisition, total cost   1,125
Business acquisition, date   May 06, 2014
FM Translators, Orlando, Florida, Tampa, Florida, Omaha, Nebraska (asset purchase)
   
Business Acquisition [Line Items]    
Business acquisition, total cost   357
Business acquisition, date   Apr. 15, 2014
KDIS-FM, Little Rock Arkansas and KRDY-AM, San Antonio, Texas (business acquisition)
   
Business Acquisition [Line Items]    
Business acquisition, total cost   1,984
Business acquisition, date   Feb. 07, 2014
Eagle Publishing (business acquisition)
   
Business Acquisition [Line Items]    
Business acquisition, total cost 8,500 10,628
Business acquisition, date   Jan. 10, 2014
Purchase of various Internet assets (asset purchases)
   
Business Acquisition [Line Items]    
Business acquisition, total cost   $ 408