Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock Option Plan and Restricted Stock Activity (Details)

v3.21.2
Stockholders' Equity - Stock Option Plan and Restricted Stock Activity (Details)
9 Months Ended
Sep. 30, 2021
$ / shares
shares
Stock Options  
Shares  
Balance at beginning of period (shares) | shares 2,561,822
Granted (shares) | shares 363,889
Options exercised (shares) | shares (564,302)
Forfeited (shares) | shares (121,472)
Balance at end of period (shares) | shares 2,239,937
Weighted-Average Exercise Price  
Balance at beginning of period (USD per share) | $ / shares $ 85.59
Granted (USD per share) | $ / shares 160.36
Options exercised (USD per share) | $ / shares 52.55
Forfeited (USD per share) | $ / shares 109.27
Balance at end of period (USD per share) | $ / shares $ 104.77
Restricted Stock Awards  
Restricted Stock Awards  
Nonvested at beginning of period (shares) | shares 206,202
Granted (shares) | shares 165,117
RSUs vested (shares) | shares (95,657)
Forfeited (shares) | shares (9,575)
Nonvested at end of period (shares) | shares 266,087
Weighted-Average Grant Date Fair Value  
Nonvested at beginning of period (USD per share) | $ / shares $ 106.88
Granted (USD per share) | $ / shares 170.04
RSUs vested (USD per share) | $ / shares 126.48
Forfeited (USD per share) | $ / shares 138.81
Nonvested at end of period (USD per share) | $ / shares $ 137.88