Annual report pursuant to Section 13 and 15(d)

Percentage Range by Which Fair Value Exceeds Carrying Value of Broadcasting Licenses for Each of Clusters (Detail)

v2.4.0.6
Percentage Range by Which Fair Value Exceeds Carrying Value of Broadcasting Licenses for Each of Clusters (Detail) (Broadcast licenses, USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Entity
25%
  
Fair Value Measurements [Line Items]  
Number of market clusters 12
Carrying value $ 248,939
>26% to 30%
  
Fair Value Measurements [Line Items]  
Number of market clusters 2
Carrying value 22,112
>30% to 75%
  
Fair Value Measurements [Line Items]  
Number of market clusters 6
Carrying value 26,586
Greater than 75%
  
Fair Value Measurements [Line Items]  
Number of market clusters 9
Carrying value $ 76,082