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Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jan. 01, 2021
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     0 0 0
Aggregate intrinsic value of options exercised in period     $ 26,200 $ 53,400 $ 71,000
Aggregate intrinsic value of options outstanding     16,300    
Unrecognized stock-based compensation expense, related to stock options     $ 10    
2014 Stock Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares reserved for future issuance under the plan (in shares)       13,322,000  
Additional shares authorized under the plan, percentage increase     4.50%    
Shares added to plan, automatic increase provision (in shares) 2,500,000        
Shares transferred from the previous plan that expired or terminated (in shares)     0    
Initial reserve of shares under the plan (in shares)     15,823,000    
Granted (in shares)     2,706,000    
Shares available for future issuance under the plan (in shares)     7,721,000    
Total fair market value of stock options vested during the period     $ 400 $ 2,400 $ 4,200
2007 Stock Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for future issuance under the plan (in shares)     0    
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation, period for recognition     2 years 9 months 18 days    
Vesting period     4 years    
Unrecognized stock-based compensation expense     $ 119,800    
Restricted Stock Units (RSUs) | Tranche Three          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights     25.00%    
Restricted Stock Units (RSUs) | 2014 Stock Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares reserved for future issuance under the plan (in shares)     6,799,000    
Shares transferred from the previous plan that expired or terminated (in shares)     1,403,000    
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted (in shares)     0 0 0
Unrecognized stock-based compensation, period for recognition     2 months 12 days    
Vesting period     36 months    
Market Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation, period for recognition     2 years    
Vesting period     3 years    
Unrecognized stock-based compensation expense     $ 9,000    
Market Stock Units | Tranche Three          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights     200.00%    
Market Stock Units | Tranche Five          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   2 years 2 years    
Award vesting rights   200.00%      
Market Stock Units | Tranche Six          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   3 years 3 years