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Other Non-current Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 30, 2018
Other Noncurrent Liabilities [Line Items]    
Sale leaseback obligations, less current portion $ 172,704 $ 174,520
Long-term portion of unfavorable leases 0 45,195
Finance Lease, Liability, Noncurrent 11,888 12,330
Other 5,949 6,534
Other noncurrent liabilities $ 190,541 $ 238,579