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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)

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