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Common Stock and Stockholders' Equity - Restricted Stock Units (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Other disclosures        
Stock-based compensation $ 82,970 $ 21,928 $ 169,270 $ 40,243
RSUs        
Common Stock and Stockholders' Equity        
Vesting period     3 years  
Shares        
Outstanding at beginning of period (in shares)     3,550,595  
Granted including replacement awards for merger (in shares)     491,823  
Vested and issued (in shares)     (987,004)  
Forfeited (in shares)     (523,210)  
Outstanding at end of period (in shares) 2,532,204   2,532,204  
Vested and unissued (in shares) 13,755   13,755  
Nonvested (in shares) 2,518,449   2,518,449  
Weighted-Average Grant Date Fair Value Per Share        
Outstanding at beginning of period (in dollars per share)     $ 162.11  
Granted including replacement awards for merger (in dollars per share)     207.73  
Vested and issued (in dollars per share)     121.45  
Forfeited (in dollars per share)     188.55  
Outstanding at end of period (in dollars per share) $ 177.30   177.30  
Vested and unissued (in dollars per share) 50.90   50.90  
Non-vested (in dollars per share) $ 177.30   $ 177.30  
Other disclosures        
Grant date fair value of RSUs granted $ 13,900 3,500 $ 101,900 43,000
Stock-based compensation 51,300 $ 11,300 102,200 $ 20,700
Unrecognized compensation cost related to non vested awards $ 394,300   $ 394,300  
Period over which unrecognized compensation cost is expected to be recognized     2 years 4 months 24 days  
Minimum | RSUs        
Common Stock and Stockholders' Equity        
Vesting period     1 year  
Maximum | RSUs        
Common Stock and Stockholders' Equity        
Vesting period     4 years