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Cash and Investments - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($)
$ in Thousands
Apr. 03, 2020
Jan. 03, 2020
Mar. 29, 2019
Dec. 28, 2018
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 357,340 $ 266,501    
Restricted cash equivalents included in long-term investments 1,636 1,636    
Cash, cash equivalents, and restricted cash equivalents as reported within the accompanying Condensed Consolidated Statements of Cash Flows $ 358,976 $ 268,137 $ 375,037 $ 315,875