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Fair Value of Financial Instruments - Available-for-sale investments (Details) - USD ($) $ in Thousands | Apr. 02, 2022 | Jan. 01, 2022
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Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months | $ 918,277 | $ 545,874
Fair value of available-for-sale securities, continuous loss position for twelve months or greater | 8,051 | 5,306
Total fair value of available-for-sale securities, continuous loss position | 926,328 | 551,180
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (11,614) | (2,201)
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (1,102) | (1,021)
Available-for-sale securities, total gross unrealized losses | (12,716) | (3,222)
Government debt securities |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months | 290,078 | 126,957
Fair value of available-for-sale securities, continuous loss position for twelve months or greater | 478 |
Total fair value of available-for-sale securities, continuous loss position | 290,556 | 126,957
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (3,907) | (750)
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (12) |
Available-for-sale securities, total gross unrealized losses | (3,919) | (750)
Corporate debt securities |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for less than twelve months | 628,199 | 418,917
Fair value of available-for-sale securities, continuous loss position for twelve months or greater | 2,629 | 326
Total fair value of available-for-sale securities, continuous loss position | 630,828 | 419,243
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (7,707) | (1,451)
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (34) | (1)
Available-for-sale securities, total gross unrealized losses | (7,741) | (1,452)
Auction rate securities |  |
Continuous unrealized loss position, Fair Value |  |
Fair value of available-for-sale securities, continuous loss position for twelve months or greater | 4,944 | 4,980
Total fair value of available-for-sale securities, continuous loss position | 4,944 | 4,980
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (1,056) | (1,020)
Available-for-sale securities, total gross unrealized losses | $ (1,056) | $ (1,020)

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