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Stock-Based Compensation - Restricted Stock Units Activity (Details) - Restricted Stock Units
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Number of shares, Beginning Balance (in shares) | shares 533,185
Number of shares, Granted (in shares) | shares 107,216
Number of shares, Forfeited (in shares) | shares (22,752)
Number of shares, Settled (in shares) | shares (184,589)
Number of shares, Ending Balance (in shares) | shares 433,060
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]  
Weighted Average Grant Date Fair Value, Beginning Balance (in $ per share) | $ / shares $ 106.19
Weighted Average Grant Date Fair Value, Granted (in $ per share) | $ / shares 268.56
Weighted Average Grant Date Fair Value, Forfeited (in $ per share) | $ / shares 127.96
Weighted Average Grant Date Fair Value, Settled (in $ per share) | $ / shares 123.17
Weighted Average Grant Date Fair Value, Ending Balance (in $ per share) | $ / shares $ 138.00