XML 131 R56.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Significant Accounting Policies (Foreign Transaction Gains and Losses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Foreign currency transaction gains (losses) $ 3,932 $ (5,820) $ 7,849