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Income Taxes - Additional Information (Details) - USD ($) | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2020
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Effective tax rate | 25.30% | 28.50% |  |  |
Net income tax provision related to exercise of stock options | $ 166,000 |  |  |  |
Net income tax benefit related to vesting of restricted shares |  | $ 231,000 |  |  |
Deferred tax assets, net | 45,200,000 |  |  |  | $ 40,200,000
State and Local Jurisdiction |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Net operating loss carryforwards | $ 100,000 |  |  |  |
Operating Loss Carryforwards Expiration Term | Dec. 31, 2033 |  |  |  |
State and Local Jurisdiction | Forecast |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Net operating loss carryforwards |  |  | $ 100,000 | $ 100,000 |

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