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Fair Value Measurements (Installment Loan) (Details) - USD ($)
$ in Thousands
Sep. 29, 2015
Dec. 30, 2014
Carrying Amount    
Carrying amount and Fair value of financial instruments    
Installment loan $ 727 $ 822
Fair Value | Level 2    
Carrying amount and Fair value of financial instruments    
Installment loan $ 870 $ 955