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Acquisitions - Summary of Purchase Price Allocation for Company's Acquisition of Pulpo Media, Inc (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 18, 2014
Business Acquisition [Line Items]      
Accounts receivable     $ 1,600
Goodwill $ 50,081 $ 50,081  
Pulpo Media Inc      
Business Acquisition [Line Items]      
Accounts receivable     1,600
Prepaids and other assets     100
Property and equipment     500
Intangible assets subject to amortization     3,400
Goodwill     14,100
Current liabilities     (1,800)
Deferred income taxes     $ (1,500)