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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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