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Stock Award Plans and Stock-Based Compensation - Employee Stock Purchase Plan (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Employee Stock Purchase Plan |  |  |
Stock-based compensation expense | $ 21.0 | $ 18.3 | $ 13.4
Employee Stock Purchase Plan |  |  |
Employee Stock Purchase Plan |  |  |
Purchase price as a percentage of the market value of a common stock on the day the stock is purchased | 85.00% |  |
Offering period over which compensation expense is amortized | 6 months |  |
Stock-based compensation expense | $ 0.4 | $ 0.4 | $ 0.3
Number of shares of common stock originally reserved for future grant | 900,000 |  |
Number of shares purchased on that date to be issued pending settlement | 19,268 |  |
Number of shares purchased under the plan | 100,000 |  |
Employee Stock Purchase Plan | Maximum |  |  |
Employee Stock Purchase Plan |  |  |
Payroll deductions as a percentage of employee's salary | 10.00% |  |
Number of shares purchased under the plan |  | 100,000 | 100,000

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