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Organization and Other Matters (Details) $ / shares in Units, $ in Millions | Dec. 31, 2023 USD ($) location network $ / shares shares | Jun. 23, 2023 USD ($) | Dec. 31, 2022 USD ($) shares | Jun. 30, 2020 $ / shares | Sep. 19, 2019 USD ($) | May 31, 2017
--- | --- | --- | --- | --- | --- | ---
Organization and Other Matters |  |  |  |  |  |
Long-term debt | $ 364.6 |  | $ 498.7 |  |  |
Marketplace |  |  |  |  |  |
Organization and Other Matters |  |  |  |  |  |
Number of vehicle logistics center locations (Canada) | network | 15 |  |  |  |  |
AFC |  |  |  |  |  |
Organization and Other Matters |  |  |  |  |  |
Number of floorplan financing locations | location | 90 |  |  |  |  |
Series A Preferred Stock [Member] |  |  |  |  |  |
Organization and Other Matters |  |  |  |  |  |
Series A Preferred Stock par value per share | $ / shares | $ 0.01 |  |  | $ 0.01 |  |
Series A Preferred Stock shares outstanding | shares | 634,305 |  | 634,305 |  |  |
Senior Notes [Member] |  |  |  |  |  |
Organization and Other Matters |  |  |  |  |  |
Long-term debt | $ 210.0 |  | $ 350.0 |  |  |
Senior notes stated interest rate | 5.125% |  |  |  |  | 5.125%
Credit Agreement | Senior secured revolving credit facility |  |  |  |  |  |
Organization and Other Matters |  |  |  |  |  |
Maximum borrowing capacity | $ 325.0 | $ 325.0 |  |  |  |
Long-term debt | 137.0 |  | 0.0 |  |  |
Previous Credit Agreement | Term Loan B-6 |  |  |  |  |  |
Organization and Other Matters |  |  |  |  |  |
Long-term debt |  |  |  |  | $ 950.0 |
Previous Credit Agreement | Previous Revolving Credit Facility |  |  |  |  |  |
Organization and Other Matters |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 325.0 |
Long-term debt | $ 0.0 |  | $ 145.0 |  |  |

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