Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

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Fair Value Measurements (Details) - Recurring - USD ($)
$ in Thousands
Jul. 12, 2015
Dec. 28, 2014
Assets:    
Investments in rabbi trust $ 6,806 $ 5,723
Total assets measured at fair value 6,806 5,723
Liabilities:    
Derivative—interest rate swap 0 347
Total liabilities measured at fair value 0 347
Level 1    
Assets:    
Investments in rabbi trust 6,806 5,723
Total assets measured at fair value 6,806 5,723
Liabilities:    
Derivative—interest rate swap 0 0
Total liabilities measured at fair value 0 0
Level 2    
Assets:    
Investments in rabbi trust 0 0
Total assets measured at fair value 0 0
Liabilities:    
Derivative—interest rate swap 0 347
Total liabilities measured at fair value 0 347
Level 3    
Assets:    
Investments in rabbi trust 0 0
Total assets measured at fair value 0 0
Liabilities:    
Derivative—interest rate swap 0 0
Total liabilities measured at fair value $ 0 $ 0