Quarterly report pursuant to Section 13 or 15(d)

Revenue And Contract Liabilities (Schedule Of Other Revenue) (Details)

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Revenue And Contract Liabilities (Schedule Of Other Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Jun. 27, 2020
Jun. 29, 2019
Revenue And Contract Liabilities [Abstract]        
Other Revenue $ 978 $ 784 $ 1,977 $ 1,657