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PROPERTY AND EQUIPMENT, NET - Additional information (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 28, 2024 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Property and Equipment, Net |  |  |  |  |
Depreciation expense |  | $ 8.6 | $ 8.5 | $ 25.2 | $ 25.4
Gain on sale of property held for sale |  |  |  | $ 1.0 | $ 0.0
Former Chicago Headquarters Location | Disposal group, disposed of by sale, not discontinued operations |  |  |  |  |
Property and Equipment, Net |  |  |  |  |
Purchase price of the property | $ 12.0 |  |  |  |
Purchase price of the property, cash | 5.0 |  |  |  |
Purchase price of the property, seller financing | 7.0 |  |  |  |
Gain on sale of property held for sale | 1.0 |  |  |  |
Secured promissory note receivable | $ 7.0 |  |  |  |
Secured promissory note receivable, interest rate (as a percent) | 4.00% |  |  |  |
Term of note receivable unless the purchaser sells the property | 2 years |  |  |  |

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