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Fair Value of Financial Instruments - Available-for-sale investments (Details) - USD ($) $ in Thousands | Oct. 01, 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 | $ 696,150 | $ 545,874
Fair value of available-for-sale securities, continuous loss position for twelve months or greater | 159,894 | 5,306
Total fair value of available-for-sale securities, continuous loss position | 856,044 | 551,180
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (13,404) | (2,201)
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (5,246) | (1,021)
Available-for-sale securities, total gross unrealized losses | (18,650) | (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 | 225,388 | 126,957
Fair value of available-for-sale securities, continuous loss position for twelve months or greater | 55,508 |
Total fair value of available-for-sale securities, continuous loss position | 280,896 | 126,957
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (3,880) | (750)
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (2,599) |
Available-for-sale securities, total gross unrealized losses | (6,479) | (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 | 470,762 | 418,917
Fair value of available-for-sale securities, continuous loss position for twelve months or greater | 104,386 | 326
Total fair value of available-for-sale securities, continuous loss position | 575,148 | 419,243
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for less than 12 months, gross unrealized losses | (9,524) | (1,451)
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses | (2,647) | (1)
Available-for-sale securities, total gross unrealized losses | $ (12,171) | (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 |  | 4,980
Total fair value of available-for-sale securities, continuous loss position |  | 4,980
Continuous unrealized loss position, Gross Unrealized Losses |  |
Available-for-sale securities, continuous loss position for 12 months or greater, gross unrealized losses |  | (1,020)
Available-for-sale securities, total gross unrealized losses |  | $ (1,020)

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