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Stock-based Compensation - Narrative (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 USD ($) | Dec. 31, 2025 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares | Dec. 31, 2023 USD ($) $ / shares | Nov. 25, 2024 shares | Nov. 04, 2024
Stock based Compensation |  |  |  |  |  |
Number of shares authorized (in shares) | shares |  | 6,022,665 |  |  |  |
Number of shares authorized, remaining (in shares) | shares |  | 2,572,291 |  |  |  |
Tax Free Distribution Of Concentra Common Stock |  |  |  |  |  |
Stock based Compensation |  |  |  |  |  |
Percent of unvested awards receiving accelerated vesting |  |  |  |  |  | 0.3333
Accelerated stock compensation expense | $ | $ 23.6 |  |  |  |  |
Distribution Of Vested Concentra Shares |  |  |  |  |  |
Stock based Compensation |  |  |  |  |  |
Accelerated stock compensation expense | $ | $ 22.3 |  |  |  |  |
Concentra Shareholders |  |  |  |  |  |
Stock based Compensation |  |  |  |  |  |
Number of Concentra shares issued for each outstanding share of Company common stock (in shares) | shares |  |  |  |  | 0.806971 |
Restricted stock awards |  |  |  |  |  |
Stock based Compensation |  |  |  |  |  |
Weighted average grant date fair value of granted shares (in dollars per share) | $ / shares |  | $ 14.87 | $ 28.38 | $ 29.06 |  |
Fair value of vested shares | $ |  | $ 29.0 | $ 110.2 | $ 33.9 |  |
Minimum | Restricted stock awards |  |  |  |  |  |
Stock based Compensation |  |  |  |  |  |
Award vesting period |  | 3 years |  |  |  |
Maximum | Restricted stock awards |  |  |  |  |  |
Stock based Compensation |  |  |  |  |  |
Award vesting period |  | 4 years |  |  |  |

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