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Long-term Debt (Schedule of Long-term Debt) (Details) - USD ($)
$ in Thousands
Dec. 28, 2016
Dec. 30, 2015
Debt Instrument [Line Items]    
Revolving loans due March 30, 2020 $ 218,500 $ 195,000
Capital lease obligations 27,091 20,745
Total long-term debt 245,591 215,745
Less current maturities 3,285 3,246
Noncurrent portion of long-term debt $ 242,306 $ 212,499