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Goodwill - Summary of Change in Amount of Goodwill (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Goodwill [Roll Forward]    
Beginning balance [1] $ 5,227  
Write-off of goodwill resulted from the disposal of the Advertising Business (35,472)  
Ending balance 161,753 [2] $ 5,227 [1]
Impairment of goodwill 0  
Interactive Data [Member]    
Goodwill [Roll Forward]    
Addition as a result of acquisition/merger   $ 5,227
Ending balance 5,227  
Tiger Media [Member]    
Goodwill [Roll Forward]    
Addition as a result of acquisition/merger 35,472  
Fluent Acquisition [Member]    
Goodwill [Roll Forward]    
Addition as a result of acquisition/merger $ 156,526  
[1] As IDI Holdings, the accounting acquirer of the merger consummated effective as of March 21, 2015, was incorporated on September 22, 2014, the financial data for the corresponding period in 2014 were from September 22, 2014, the date of inception, through December 31, 2014.
[2] As the Company completed the Fluent Acquisition on December 8, 2015, the related operating results for the year ended December 31, 2015 included Fluent's financial data from December 9, 2015 through December 31, 2015.