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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions |  |  | 3 Months Ended | 12 Months Ended | 104 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 19, 2021 | Jan. 04, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends paid per share of common stock (in dollars per share) |  |  | $ 0.650 | $ 0.250 | $ 0.250 | $ 0.250 | $ 0.220 | $ 0.220 | $ 0.215 | $ 0.215 | $ 1.40 | $ 0.87 | $ 0.77 |
Options Granted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,104,021
Options vesting and exercisable period, maximum |  |  |  |  |  |  |  |  |  |  | 8 years |  |  |
Options termination period |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |
Total intrinsic value of stock options exercised |  |  |  |  |  |  |  |  |  |  | $ 26.7 | $ 20.2 | $ 4.2 |
Total unrecognized stock-based compensation expense |  |  | $ 12.6 |  |  |  |  |  |  |  | $ 12.6 |  |  | $ 12.6
Weighted average period over which total unrecognized stock-based compensation expense will be recognized |  |  |  |  |  |  |  |  |  |  | 3 years 10 months 13 days |  |  |
Total grant date fair value of stock options vested |  |  |  |  |  |  |  |  |  |  | $ 6.1 | 5.9 | 5.3 |
Total stock-based compensation expense |  |  |  |  |  |  |  |  |  |  | $ 5.7 | $ 5.7 | $ 5.1 |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared per share of common stock (in dollars per share) | $ 0.28 |  |  |  |  |  |  |  |  |  |  |  |  |
Options Granted (in shares) |  | 714,867 |  |  |  |  |  |  |  |  |  |  |  |
Option Exercise (Strike) Price (in dollars per share) |  | $ 48.00 |  |  |  |  |  |  |  |  |  |  |  |
Closing Stock Price on Date of Grant (in dollars per share) |  | $ 47.65 |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event | Non-employee Director Options Elected |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options Granted (in shares) |  | 26,643 |  |  |  |  |  |  |  |  |  |  |  |
Option Exercise (Strike) Price (in dollars per share) |  | $ 48.00 |  |  |  |  |  |  |  |  |  |  |  |

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