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Business Combinations - Summary of Fair Values of Tangible and Intangible Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Feb. 02, 2018
Business Acquisition [Line Items]    
Goodwill $ 30,572  
Useful life of acquired intangible assets 7 years  
Digital Fuel    
Business Acquisition [Line Items]    
Cash   $ 97
Accounts receivable   6,093
Other tangible assets   3,636
Accounts payable, deferred revenue and other liabilities   (16,920)
Net assets acquired   13,006
Goodwill   30,572
Total   43,578
Digital Fuel | Acquired developed technology    
Business Acquisition [Line Items]    
Purchase consideration of finite-lived intangibles   7,800
Useful life of acquired intangible assets 4 years  
Digital Fuel | Customer contracts and related relationships    
Business Acquisition [Line Items]    
Purchase consideration of finite-lived intangibles   11,300
Useful life of acquired intangible assets 10 years  
Digital Fuel | Order backlog    
Business Acquisition [Line Items]    
Purchase consideration of finite-lived intangibles   500
Useful life of acquired intangible assets 2 years  
Digital Fuel | Trademarks and trade name    
Business Acquisition [Line Items]    
Purchase consideration of finite-lived intangibles   $ 500
Useful life of acquired intangible assets 3 years