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Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Engineering, Selling and Administrative Expense |  |  |  |
Stock-Based Compensation |  |  |  |
Stock-based compensation expense (in dollars) | $ 2.4 | $ 2.4 | $ 8.0 | $ 7.8
Restricted Stock Units |  |  |  |
Stock-Based Compensation |  |  |  |
Granted (in shares) | 2,694 | 11,849 | 461,632 | 512,132
Restricted Stock Units | Director |  |  |  |
Stock-Based Compensation |  |  |  |
Granted (in shares) |  |  | 78,894 | 77,576
Performance Shares |  |  |  |
Stock-Based Compensation |  |  |  |
Granted (in shares) | 0 | 0 | 365,174 | 316,022
Performance Shares 2024 | Performance Shares |  |  |  |
Stock-Based Compensation |  |  |  |
Percentage of shares paid based on total shareholder return relative to peer group (as a percent) |  |  | 60.00% |
Percentage of shares paid based on adjusted EBITDA (as a percent) |  |  | 40.00% |
Increase decrease in percentage of shares paid based on total shareholder return relative to defined peer group |  |  | 20.00% |
Performance period (in years) |  |  | 3 years |
Percentage of shares of other than options granted during the period |  |  | 200.00% |
Performance Shares 2023 | Performance Shares |  |  |  |
Stock-Based Compensation |  |  |  |
Percentage of shares paid based on total shareholder return relative to peer group (as a percent) |  |  |  | 60.00%
Percentage of shares paid based on adjusted EBITDA (as a percent) |  |  |  | 40.00%
Increase decrease in percentage of shares paid based on total shareholder return relative to defined peer group |  |  |  | 20.00%
Performance period (in years) |  |  |  | 3 years
Percentage of shares of other than options granted during the period |  |  |  | 200.00%

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