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Fair Value Measurements (Fair Value Measurements - Carrying Amount and Fair Value) (Details) - USD ($)
$ in Thousands
Sep. 28, 2019
Dec. 29, 2018
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Finance lease obligations $ 20,526  
Operating Lease, Liability 8,211  
Carrying (Reported) Amount, Fair Value Disclosure [Member]    
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and cash equivalents 19 $ 18
Notes receivable 0 282
Interest rate swaps 0 36
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Long-term debt and finance leases, including current portion 103,623 115,949
Finance lease obligations 20,526 12,096
Operating Lease, Liability 8,211 0
Interest rate swaps 1,972 1,008
Estimate of Fair Value, Fair Value Disclosure [Member]    
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]    
Cash and cash equivalents 19 18
Notes receivable 0 282
Interest rate swaps 0 36
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Long-term debt and finance leases, including current portion 103,697 112,519
Finance lease obligations 19,303 11,723
Operating Lease, Liability 8,211 0
Interest rate swaps $ 1,972 $ 1,008