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Description of Business and Summary of Significant Accounting Policies (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 28, 2025 USD ($) | Jun. 29, 2025 USD ($) | Sep. 29, 2024 USD ($) | Sep. 28, 2025 USD ($) segment | Sep. 29, 2024 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | segment |  |  |  | 3 |
Goodwill impairment | $ 0 | $ 356,000 | $ 0 | $ 355,958 | $ 0
Finance lease, impairment loss |  |  |  | 29,200 |
Long-lived asset impairment charges |  |  |  | $ 26,700 |
Measurement Input, Discount Rate | U.S. Reporting Unit |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Goodwill measurement input |  | 0.100 |  |  |
Measurement Input, Discount Rate | KK U.K. Reporting Unit |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Goodwill measurement input |  | 0.120 |  |  |
Measurement Input, Discount Rate | KK Australia Reporting Unit |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Goodwill measurement input |  | 0.120 |  |  |

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