Quarterly report pursuant to Section 13 or 15(d)

Contingent Earn-Out Consideration - Additional Information (Detail)

v2.4.0.8
Contingent Earn-Out Consideration - Additional Information (Detail) (USD $)
3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Dec. 10, 2013
Twitchy.com (business acquisition)
Sep. 30, 2014
Twitchy.com (business acquisition)
Sep. 30, 2014
Twitchy.com (business acquisition)
Dec. 10, 2013
Twitchy.com (business acquisition)
Sep. 30, 2014
Eagle Publishing (business acquisition)
Jun. 30, 2014
Eagle Publishing (business acquisition)
Sep. 30, 2014
Eagle Publishing (business acquisition)
Jan. 10, 2014
Eagle Publishing (business acquisition)
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]                    
Contingent earn-out consideration period     2 years   1 year 3 months       2 years 6 months  
Total contingent earn-out consideration       $ 1,000,000 $ 1,000,000 $ 1,200,000       $ 8,500,000
Estimated fair value of contingent earn-out consideration           600,000       2,000,000
Change in fair value of contingent earn-out consideration $ 545,000 $ 914,000   $ 58,000,000 $ 275,000,000   $ 600,000 $ 500,000