Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 28, 2025	Dec. 28, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	$ 579,626	$ 658,491
Investments in equity securities	9,249	10,182
Mutual funds	24,328	23,268
Total	613,203	691,941
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	579,626	658,491
Investments in equity securities	9,249	10,182
Mutual funds	24,328	23,268
Total	613,203	691,941
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Investments in equity securities	0	0
Mutual funds	0	0
Total	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents	0	0
Investments in equity securities	0	0
Mutual funds	0	0
Total	$ 0	$ 0