v3.20.2
Segment and Geographic Information - Summary of Revenue by Geography (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Disaggregation of Revenue [Line Items]        
Revenues $ 289,366 $ 190,541 $ 770,582 $ 513,197
Geographic Concentration Risk [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ 289,366 $ 190,541 $ 770,582 $ 513,197
Concentration risk, percentage 100.00% 100.00% 100.00% 100.00%
United States [Member] | Geographic Concentration Risk [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ 156,336 $ 79,185 $ 391,106 $ 197,351
Concentration risk, percentage 54.00% 42.00% 51.00% 38.00%
United Kingdom [Member] | Geographic Concentration Risk [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ 35,432 $ 29,765 $ 94,440 $ 89,384
Concentration risk, percentage 12.00% 16.00% 12.00% 17.00%
France [Member] | Geographic Concentration Risk [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ 23,214 $ 16,930 $ 78,572 $ 50,222
Concentration risk, percentage 8.00% 9.00% 10.00% 10.00%
Rest of world [Member] | Geographic Concentration Risk [Member]        
Disaggregation of Revenue [Line Items]        
Revenues $ 74,384 $ 64,661 $ 206,464 $ 176,240
Concentration risk, percentage 26.00% 33.00% 27.00% 35.00%