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Stock Plans and Stock-Based Compensation - Performance-Based Restricted Stock Units - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense $ 12,685 $ 10,310  
Performance-Based Restricted Stock Units      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based compensation, number of stock unit grants in period 30,907    
Stock-based compensation expense $ 5,900 $ 4,600  
Award achievement probability percentage 100.00%    
Weighted-average grant date fair values of units granted $ 133.06 $ 97.23  
Number of stock units vested 6,895    
Unrecognized compensation expense $ 33,800    
Weighted-average amortization period 1 year 8 months 12 days    
Performance-Based Restricted Stock Units | Tranche One      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based compensation, compounded annual growth measurement period 2 years    
Share-based compensation, vesting stock percentage 50.00%    
Performance-Based Restricted Stock Units | Tranche Two      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based compensation, compounded annual growth measurement period 3 years    
Performance-Based Restricted Stock Units | Minimum      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based compensation, thresholds percentage of revenue growth 20.00%   15.00%
Share price $ 118.50    
Performance-Based Restricted Stock Units | Maximum      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based compensation, thresholds percentage of revenue growth 40.00%   35.00%
Share price $ 146.69