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Lessee ROU Assets and Lease Liabilities Lease, Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 29, 2019
Jun. 29, 2019
Leases [Abstract]    
Operating lease costs $ 1,688 $ 3,453
Short-term lease costs 3 12
Sublease income (52) (104)
Total lease cost $ 1,639 $ 3,361