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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2020
Equity [Abstract] |
Schedule of Stock Option Plan Activity | The following is a summary of our stock option and restricted stock activity and related information:
| Stock Options |  | Restricted Stock Awards
| Shares |  | Weighted-Average Exercise Price |  | Shares |  | Weighted-Average Grant Date Fair Value
Balance as of December 31, 2019 | 1,956,379 |  |  | $ | 77.54 |  |  | 147,259 |  |  | $ | 125.11 |
Granted | 480,250 |  |  | $ | 90.08 |  |  | 104,306 |  |  | $ | 89.58 |
Options exercised/RSUs vested | (113,107) |  |  | $ | 23.91 |  |  | (50,053) |  |  | $ | 122.16 |
Forfeited | (10,200) |  |  | $ | 72.01 |  |  | — |  |  | $ | — |
Balance as of September 30, 2020 | 2,313,322 |  |  | $ | 82.79 |  |  | 201,512 |  |  | $ | 107.45 |
Schedule of Restricted Stock Activity | The following is a summary of our stock option and restricted stock activity and related information:
| Stock Options |  | Restricted Stock Awards
| Shares |  | Weighted-Average Exercise Price |  | Shares |  | Weighted-Average Grant Date Fair Value
Balance as of December 31, 2019 | 1,956,379 |  |  | $ | 77.54 |  |  | 147,259 |  |  | $ | 125.11 |
Granted | 480,250 |  |  | $ | 90.08 |  |  | 104,306 |  |  | $ | 89.58 |
Options exercised/RSUs vested | (113,107) |  |  | $ | 23.91 |  |  | (50,053) |  |  | $ | 122.16 |
Forfeited | (10,200) |  |  | $ | 72.01 |  |  | — |  |  | $ | — |
Balance as of September 30, 2020 | 2,313,322 |  |  | $ | 82.79 |  |  | 201,512 |  |  | $ | 107.45 |

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