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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 26, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock appreciation rights classification modification |  | $ 1,738 |  |  | $ 1,738 |  |  |
Stock-based compensation recognized |  | (100) |  | $ (2,754) | $ (191) | $ 1,490 |  |
Grant date fair value |  |  |  |  | $ 2.74 |  |  |
Risk-free rate |  |  |  |  | 3.65% |  |  |
Volatility rate |  |  |  |  | 69.81% |  |  |
Expected Life |  |  |  |  | 10 years |  |  |
2022 Long Term Incentive Plan | The FreightCar America, Inc [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award contractual term | 10 years |  |  |  |  |  |  |
Stock appreciation award vesting rights | Vesting of the Inducement Options is contingent on the achievement of the later of (i) the first date the closing price of one share of the Company’s Common Stock is equal to or greater than 125% of the exercise price; and (ii) the vesting of one-third of the options per year for three consecutive years after, and on each anniversary of, the Grant Date. |  |  |  |  |  |  |
Exercise price | $ 2.73 |  |  |  |  |  |  |
Granted | 300,000 |  |  |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unearned compensation related to options |  | 1,822 |  |  | $ 1,822 |  |  |
Remaining requisite service period |  |  |  |  | 22 months |  |  |
Cash Settled Stock [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Remaining requisite service period |  |  |  |  | 6 months |  |  |
Unearned compensation |  | 167 |  |  | $ 167 |  |  |
Time-Vested Stock Options [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Unearned compensation related to options |  | 1,664 |  |  | $ 1,664 |  |  |
Remaining service period |  |  |  |  | 25 months |  |  |
Stock Appreciation Rights (SARs) [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Allocated share based compensation expense (income) |  | $ (636) |  | (2,951) | $ (1,219) | 808 |  |
Estimated fair value |  |  |  | $ 3,212 |  | $ 3,212 |  |
Stock appreciation award vesting rights |  |  |  |  | Vesting of the 2021 cash settled stock appreciation rights was contingent upon the achievement of a thirty-day trailing average fair market value of a share of Common Stock of 133.3% ($3.17) |  |  |
Exercise price |  |  | $ 2.38 |  |  |  |  |
Stock Appreciation Rights (SARs) [Member] | 2020 [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award Vesting Period |  |  |  |  | 3 years |  |  |
Award contractual term |  |  |  |  | 10 years |  |  |
Stock Appreciation Rights (SARs) [Member] | 2021 [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award Vesting Period |  |  |  |  | 3 years |  |  |
Award contractual term |  |  |  |  | 10 years |  |  |
Certain Employees [Member] | Stock Appreciation Rights (SARs) [Member] |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |  |  |  |
Granted (shares) |  |  |  |  |  |  | 1,735,500 |
Granted |  |  |  |  |  |  |  | 1,164,464

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