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Fair Value of Financial Instruments - Available-for-sale investments (Details) - USD ($)
$ in Thousands
Oct. 01, 2022
Jan. 01, 2022
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)