v3.19.2
Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 179,591 $ 226,259
Accumulated Amortization 99,780 100,205
Net $ 79,811 $ 126,054
Domain Names    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Remaining Useful Life - Years 1 year 6 months 1 year 7 months 6 days
Gross Carrying Amount $ 5,414 $ 5,414
Accumulated Amortization 4,825 4,283
Net $ 589 $ 1,131
Trademarks    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Remaining Useful Life - Years 2 months 12 days 1 year 4 months 24 days
Gross Carrying Amount $ 3,072 $ 5,772
Accumulated Amortization 3,007 4,076
Net $ 65 $ 1,696
Acquired Developed Technology    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Remaining Useful Life - Years 3 years 6 months 3 years 9 months 18 days
Gross Carrying Amount $ 149,223 $ 179,791
Accumulated Amortization 83,563 78,729
Net $ 65,660 $ 101,062
Customer Relationships    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Remaining Useful Life - Years 0 years 2 years 1 month 6 days
Gross Carrying Amount $ 2,172 $ 15,572
Accumulated Amortization $ 2,172 8,012
Net   $ 7,560
Patents    
Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Remaining Useful Life - Years 6 years 4 months 24 days 6 years 10 months 24 days
Gross Carrying Amount $ 19,710 $ 19,710
Accumulated Amortization 6,213 5,105
Net $ 13,497 $ 14,605