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Stock-Based Compensation - Restricted Stock Unit Activity (Details)
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Restricted Stock Units  
RSUs vested (in shares) | shares 186,329
Weighted Average Grant Date Fair Value  
RSUs vested (in USD per share) | $ / shares $ 33.70
Restricted stock units  
Restricted Stock Units  
Unvested and outstanding, beginning balance (in shares) | shares 1,839,998
RSUs granted (in shares) | shares 1,329,687
RSUs forfeited (in shares) | shares (45,666)
Unvested and outstanding, ending balance (in shares) | shares 2,937,690
Weighted Average Grant Date Fair Value  
Unvested and outstanding, beginning balance, grant date fair value (in USD per share) | $ / shares $ 34.17
RSUs granted (in USD per share) | $ / shares 49.77
RSUs forfeited (in USD per share) | $ / shares 35.50
Unvested and outstanding, ending balance, grant date fair value (in USD per share) | $ / shares $ 41.24
Performance-based restricted stock units  
Restricted Stock Units  
Unvested and outstanding, beginning balance (in shares) | shares 0
RSUs granted (in shares) | shares 313,322
RSUs forfeited (in shares) | shares (5,463)
Unvested and outstanding, ending balance (in shares) | shares 307,859
Weighted Average Grant Date Fair Value  
Unvested and outstanding, beginning balance, grant date fair value (in USD per share) | $ / shares $ 0
RSUs granted (in USD per share) | $ / shares 49.77
RSUs forfeited (in USD per share) | $ / shares 49.77
Unvested and outstanding, ending balance, grant date fair value (in USD per share) | $ / shares $ 49.77