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Stockholders' Equity - Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Share-based compensation expense $ 108,846 $ 84,055 $ 64,909
Cost of revenues      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Share-based compensation expense 1,621 950 426
Research and development      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Share-based compensation expense 37,131 31,588 22,229
Sales and marketing      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Share-based compensation expense 13,887 9,606 7,380
General and administrative      
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]      
Share-based compensation expense $ 56,207 $ 41,911 $ 34,874