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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
Dec. 29, 2023
Dec. 30, 2022
Fair Value    
In an Unrealized Loss Position Less than 12 Months $ 419,297 $ 793,190
In an Unrealized Loss Position 12 Months or Greater 443,240 237,620
Total 862,537 1,030,810
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months (1,253) (12,970)
In an Unrealized Loss Position 12 Months or Greater (5,323) (6,064)
Total (6,576) (19,034)
Corporate bonds    
Fair Value    
In an Unrealized Loss Position Less than 12 Months 255,958 485,685
In an Unrealized Loss Position 12 Months or Greater 281,837 221,026
Total 537,795 706,711
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months (847) (7,261)
In an Unrealized Loss Position 12 Months or Greater (3,430) (5,871)
Total (4,277) (13,132)
U.S. Treasury and government-sponsored enterprises    
Fair Value    
In an Unrealized Loss Position Less than 12 Months 163,339 298,414
In an Unrealized Loss Position 12 Months or Greater 155,452 9,893
Total 318,791 308,307
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months (406) (5,575)
In an Unrealized Loss Position 12 Months or Greater (1,844) (104)
Total (2,250) (5,679)
Municipal bonds    
Fair Value    
In an Unrealized Loss Position Less than 12 Months 0 9,091
In an Unrealized Loss Position 12 Months or Greater 5,951 6,701
Total 5,951 15,792
Gross Unrealized Losses    
In an Unrealized Loss Position Less than 12 Months 0 (134)
In an Unrealized Loss Position 12 Months or Greater (49) (89)
Total $ (49) $ (223)