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Cash and Investments - Fair Value and Gross Unrealized Losses of Investments Available-for-Sale in an Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Jun. 28, 2024
Dec. 29, 2023
Fair Value    
In an Unrealized Loss Position Less than 12 Months $ 459,857 $ 419,297
In an Unrealized Loss Position 12 Months or Greater 490,916 443,240
Total 950,773 862,537
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months (1,711) (1,253)
In an Unrealized Loss Position 12 Months or Greater (4,967) (5,323)
Total (6,678) (6,576)
Corporate bonds    
Fair Value    
In an Unrealized Loss Position Less than 12 Months 321,374 255,958
In an Unrealized Loss Position 12 Months or Greater 306,630 281,837
Total 628,004 537,795
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months (1,157) (847)
In an Unrealized Loss Position 12 Months or Greater (3,436) (3,430)
Total (4,593) (4,277)
U.S. Treasury and government-sponsored enterprises    
Fair Value    
In an Unrealized Loss Position Less than 12 Months 136,614 163,339
In an Unrealized Loss Position 12 Months or Greater 178,290 155,452
Total 314,904 318,791
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months (543) (406)
In an Unrealized Loss Position 12 Months or Greater (1,527) (1,844)
Total (2,070) (2,250)
Municipal bonds    
Fair Value    
In an Unrealized Loss Position Less than 12 Months 1,869 0
In an Unrealized Loss Position 12 Months or Greater 5,996 5,951
Total 7,865 5,951
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months (11) 0
In an Unrealized Loss Position 12 Months or Greater (4) (49)
Total $ (15) $ (49)