XML 64 R51.htm IDEA: XBRL DOCUMENT v3.19.2
Cash and Investments - Fair Value of Cash Equivalents and Investments by Contractual Maturity (Details) - USD ($)
$ in Thousands
Jun. 28, 2019
Dec. 28, 2018
Investments, Debt and Equity Securities [Abstract]    
Maturing in one year or less $ 809,607 $ 674,455
Maturing after one year through five years 326,092 153,687
Total investments available-for-sale $ 1,135,699 $ 828,142