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Net Income Per Common Share - Additional Information (Details) - $ / shares |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Apr. 06, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Earnings Per Share [Abstract] |  |  |  |  |
Anti-dilutive securities excluded from computation of earnings per share amount (in shares) |  | 1,500,000 | 100,000 | 900,000 | 100,000
Dividend Declared |  |  |  |  |
Earnings Per Share [Line Items] |  |  |  |  |
Dividends payable, date declared | Apr. 06, 2020 |  |  |  |
Number of preferred share purchase right declared as divided per common stock | 1 |  |  |  |
Dividends payable,record date | Apr. 16, 2020 |  |  |  |
Maximum percentage of common stock acquisition allowed by board of directors under rights plan | 15.00% |  |  |  |
Number of days after public announcement rights exercisable for acquiring person | 10 days |  |  |  |
Rights expiration date | Apr. 06, 2021 |  |  |  |
Dividend Declared | Series A Junior Participating Preferred Stock |  |  |  |  |
Earnings Per Share [Line Items] |  |  |  |  |
Exercise price of rights | $ 150.00 |  |  |  |

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