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Fair Value Measurements of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents $ 23,348 $ 36,312 $ 28,548 $ 34,144
Fair Value measurements on a recurring basis        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative financial instruments 3,354 2,309    
Variable-rate debt obligations 267,500 214,000    
Deferred stock-based compensation 8,885 12,203    
Fair Value measurements on a recurring basis | Government securities        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure 6,345 6,268    
Fair Value measurements on a recurring basis | Corporate bonds        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure 6,149 6,017    
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1)        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents 23,348 36,312    
Derivative financial instruments 0 0    
Variable-rate debt obligations 0 0    
Deferred stock-based compensation 0 0    
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Government securities        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure 0 0    
Fair Value measurements on a recurring basis | Quoted prices in active markets for identical assets (Level 1) | Corporate bonds        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure 0 0    
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2)        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents 0 0    
Derivative financial instruments 3,354 2,309    
Variable-rate debt obligations 267,500 214,000    
Deferred stock-based compensation 8,885 12,203    
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Government securities        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure 6,345 6,268    
Fair Value measurements on a recurring basis | Significant other observable inputs (Level 2) | Corporate bonds        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure 6,149 6,017    
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3)        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash and cash equivalents 0 0    
Derivative financial instruments 0 0    
Variable-rate debt obligations 0 0    
Deferred stock-based compensation 0 0    
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Government securities        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure 0 0    
Fair Value measurements on a recurring basis | Significant unobservable inputs (Level 3) | Corporate bonds        
Fair Value Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale securities, fair value disclosure $ 0 $ 0