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Operating Leases (Supplemental Lease Information) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 29, 2019
USD ($)
Jun. 29, 2019
USD ($)
Operating Leases [Abstract]    
Operating lease cost $ 2,328 $ 4,494
Total lease cost $ 2,328 4,494
Operating cash flows used by operating leases   4,215
ROU assets obtained in exchange for new operating lease liabilities   $ 3,305
Weighted average remaining lease term-operating leases 4 years 4 years
Weighted average discount rate-operating leases 3.73% 3.73%