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- Components of Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 28, 2019
Leases [Abstract]    
Operating lease cost $ 11,589 $ 36,417
Short-term Lease, Cost 4,903 10,653
Total lease costs $ 16,492 $ 47,070