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Lessee ROU Assets and Lease Liabilities Lease, Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 28, 2019
Leases [Abstract]    
Operating lease costs $ 1,717 $ 5,170
Short-term lease costs 0 12
Sublease income (52) (156)
Total lease cost $ 1,665 $ 5,026