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)
6 Months Ended
Jun. 30, 2021
$ / shares
shares
Stock Options  
Shares  
Balance at beginning of period (shares) | shares 2,561,822
Granted (shares) | shares 318,381
Options exercised (shares) | shares (533,451)
Forfeited (shares) | shares (83,489)
Balance at end of period (shares) | shares 2,263,263
Weighted-Average Exercise Price  
Balance at beginning of period (USD per share) | $ / shares $ 85.59
Granted (USD per share) | $ / shares 164.30
Options exercised (USD per share) | $ / shares 52.00
Forfeited (USD per share) | $ / shares 106.98
Balance at end of period (USD per share) | $ / shares $ 103.79
Restricted Stock Awards  
Restricted Stock Awards  
Nonvested at beginning of period (shares) | shares 206,202
Granted (shares) | shares 158,456
RSUs vested (shares) | shares (95,607)
Forfeited (shares) | shares (6,790)
Nonvested at end of period (shares) | shares 262,261
Weighted-Average Grant Date Fair Value  
Nonvested at beginning of period (USD per share) | $ / shares $ 106.88
Granted (USD per share) | $ / shares 171.44
RSUs vested (USD per share) | $ / shares 126.49
Forfeited (USD per share) | $ / shares 126.23
Nonvested at end of period (USD per share) | $ / shares $ 138.23