v3.10.0.1
Business Acquisitions - Summary of Total Purchase Consideration Allocation (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Jul. 31, 2017
May 31, 2017
Dec. 31, 2016
Aug. 31, 2016
Mar. 31, 2016
Business Acquisition [Line Items]              
Goodwill $ 632,370 $ 639,882     $ 319,137    
Placed, Inc.              
Business Acquisition [Line Items]              
Cash     $ 6,919        
Goodwill     103,995        
Net deferred tax liability     (13,520)        
Other assets acquired and liabilities assumed, net     5,296        
Total     139,590        
Placed, Inc. | Trademarks              
Business Acquisition [Line Items]              
Finite lived intangible assets     2,700        
Placed, Inc. | Acquired Developed Technology              
Business Acquisition [Line Items]              
Finite lived intangible assets     22,400        
Placed, Inc. | Customer Relationships              
Business Acquisition [Line Items]              
Finite lived intangible assets     $ 11,800        
Zenly SAS              
Business Acquisition [Line Items]              
Cash       $ 22,610      
Goodwill       154,353      
Net deferred tax liability       (2,418)      
Other assets acquired and liabilities assumed, net       (1,428)      
Total       196,117      
Zenly SAS | Acquired Developed Technology              
Business Acquisition [Line Items]              
Finite lived intangible assets       $ 23,000      
Other Acquisitions              
Business Acquisition [Line Items]              
Cash   1,701          
Goodwill   48,408          
Net deferred tax liability   (1,976)          
Other assets acquired and liabilities assumed, net   2,382          
Total   101,940          
Other Acquisitions | Acquired Developed Technology              
Business Acquisition [Line Items]              
Finite lived intangible assets   49,325          
Other Acquisitions | Customer Relationships              
Business Acquisition [Line Items]              
Finite lived intangible assets   $ 2,100          
Bitstrips Inc.              
Business Acquisition [Line Items]              
Goodwill             $ 52,671
Net deferred tax liability             (4,585)
Other assets acquired and liabilities assumed, net             (1,162)
Total             64,224
Bitstrips Inc. | Acquired Developed Technology              
Business Acquisition [Line Items]              
Finite lived intangible assets             15,700
Bitstrips Inc. | Customer Relationships              
Business Acquisition [Line Items]              
Finite lived intangible assets             $ 1,600
Mobile Search Company              
Business Acquisition [Line Items]              
Goodwill           $ 98,826  
Net deferred tax liability           (7,112)  
Other assets acquired and liabilities assumed, net           3,421  
Total           114,535  
Mobile Search Company | Acquired Developed Technology              
Business Acquisition [Line Items]              
Finite lived intangible assets           $ 19,400  
Computer Vision Software Company              
Business Acquisition [Line Items]              
Goodwill         35,266    
Net deferred tax liability         (500)    
Other assets acquired and liabilities assumed, net         (97)    
Total         46,969    
Computer Vision Software Company | Acquired Developed Technology              
Business Acquisition [Line Items]              
Finite lived intangible assets         $ 12,300