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Stock-Based Compensation - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Stock-Based Compensation |  |  |  |
Share-based compensation, remaining shares available for issuance (in shares) | 3,290,968 |  | 3,290,968 |
Engineering, Selling and Administrative Expense |  |  |  |
Stock-Based Compensation |  |  |  |
Stock-based compensation expense (in dollars) | $ 2.3 | $ 0.9 | $ 5.4 | $ 4.0
Restricted Stock Units |  |  |  |
Stock-Based Compensation |  |  |  |
Granted (in shares) | 22,591 | 20,929 | 500,283 | 399,552
Restricted Stock Units | Director |  |  |  |
Stock-Based Compensation |  |  |  |
Director Awards |  |  | 77,576 | 56,640
Performance Shares |  |  |  |
Stock-Based Compensation |  |  |  |
Granted (in shares) | 0 | 0 | 316,022 | 198,334
2013 Omnibus Plan |  |  |  |
Stock-Based Compensation |  |  |  |
Share-based compensation, shares authorized (in shares) | 7,477,395 |  | 7,477,395 |
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% |
Performance Shares 2022 | 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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