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Cash and Investments - Fair Value of Cash Equivalents and Investments by Contractual Maturity (Details) - USD ($)
$ in Thousands
Jul. 02, 2021
Jan. 01, 2021
Investments, Debt and Equity Securities [Abstract]    
Maturing in one year or less $ 1,015,650 $ 1,034,150
Maturing after one year through five years 339,913 321,751
Total debt securities available-for-sale $ 1,355,563 $ 1,355,901