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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 27, 2020
Jun. 29, 2019
Jun. 27, 2020
Jun. 29, 2019
Leases [Abstract]        
Operating lease expense $ 1,794 $ 1,734 $ 3,719 $ 3,479
Short-term lease expense 27 31 66 48
Variable lease expense 399 249 782 668
Lease, Cost $ 2,220 $ 2,014 $ 4,567 $ 4,195