Employee Benefit Plans - Other Retirement Plans (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Switzerland
Employee Benefit Plans
Pension gain (expense)	$ 5,500	$ 200	$ (600)
Employee benefit plan obligations included in other long-term liabilities	4,800	4,000
France
Employee Benefit Plans
Pension gain (expense)	100	(46)	100
Employee benefit plan obligations included in other long-term liabilities	900	1,000
Restricted stock units
Employee Benefit Plans
Fair value of restricted stock and restricted stock units, vested	$ 2,600	$ 9,400	$ 10,400

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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