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Basis of Presentation and New Accounting Pronouncements - ASU 2016-18 Information (Details) - USD ($)
$ in Thousands
Jun. 27, 2020
Dec. 28, 2019
Jun. 29, 2019
Dec. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Cash and cash equivalents as previously reported in the Condensed Consolidated Statements of Cash Flows $ 199,926 $ 144,545    
Current assets - Restricted cash 1,424 1,981    
Restricted cash 1,375 1,411    
Cash, cash equivalents and restricted cash as currently reported in the Condensed Consolidated Statements of Cash Flows $ 202,725 $ 147,937 $ 126,694 $ 100,546