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Adoption of Accounting Standards Codification 842 - Supplemental Cash Flow (Details)
$ in Thousands
6 Months Ended
Jun. 29, 2019
USD ($)
Leases [Abstract]  
Operating cash flows from operating leases $ 1,980
Operating cash flows from finance leases 20
Financing cash flows from finance leases 68
Right-of-use assets obtained in exchange for lease obligations:  
Operating leases 1,437
Finance leases $ 457