Annual report pursuant to Section 13 and 15(d)

Percentage Within Range by Which Enterprise Value Exceeded Carrying Value of Accounting Units, Including Goodwill (Detail)

v2.4.0.6
Percentage Within Range by Which Enterprise Value Exceeded Carrying Value of Accounting Units, Including Goodwill (Detail) (Internet and Publishing, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Entity
>20% To 50 %
 
Carrying Amounts and Fair Values of Financial Instruments [Line Items]  
Number of accounting units 2
Enterprise carrying value $ 28,722
> than 50%
 
Carrying Amounts and Fair Values of Financial Instruments [Line Items]  
Number of accounting units 4
Enterprise carrying value $ 2,103