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Business Combinations Brainjocks (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 23, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Business Acquisition [Line Items]        
Adjustment to fair value of contingent consideration   $ 514 $ (335)  
Goodwill   421,927   $ 427,928
Brainjocks        
Business Acquisition [Line Items]        
Date of acquisition Mar. 23, 2020      
Total purchase price $ 21,200      
Cash paid for acquisition 15,800      
Common stock issued 2,400      
Net working capital settlement 700      
Initial fair value estimate of additional earnings-based contingent consideration 2,300      
Contingent consideration, maximum cash payout 4,800      
Fair value of contingent consideration   3,900    
Adjustment to fair value of contingent consideration   $ 300    
Transaction costs 1,100      
Acquired tangible assets 7,000      
Identified intangible assets 8,400      
Liabilities assumed (4,900)      
Goodwill 10,700      
Tax deductible amount of Goodwill $ 8,700