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Debt - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 29, 2013
Dec. 30, 2012
Jan. 01, 2012
Sep. 04, 2013
Feb. 10, 2010
Line of Credit Facility [Line Items]          
Debt and capital lease obligations $ 463,600,000        
Debt and capital lease obligations financed through publicly offered debt 373,600,000        
Company's outstanding obligations for capital leases 65,000,000 69,600,000      
Unsecured revolving credit agreement 200,000,000     200,000,000  
Period of Unsecured revolving credit agreement 5 years        
Maturity date of unsecured revolving credit agreement Sep. 21, 2016        
Annual facility fee 0.175%        
Outstanding borrowings on unsecured revolving credit agreement 5,000,000 30,000,000      
Amount available to meet cash requirements under the revolving credit facility 195,000,000        
Uncommitted Line of Credit Agreement         20,000,000
Uncommitted line of credit initiation date Feb. 10, 2010        
Uncommitted line of credit period 1 7 days        
Uncommitted line of credit period 2 30 days        
Uncommitted line of credit period 3 60 days        
Uncommitted line of credit period 4 90 days        
Outstanding borrowing on uncommitted line of credit 20,000,000 20,000,000      
Uncommitted line of credit, weighted average interest rate 0.88% 0.94%      
Senior notes maturity prior year 150,000,000        
Maturity date of long-term debt maturing prior year 2012-11        
Weighted average interest rate on debt and capital lease obligations spot rate 6.20% 5.90%      
Overall weighted average interest rate on debt and capital lease obligations 5.80% 6.10% 6.00%    
Debt and capital lease obligations subject to changes in short-term interest rates 25,000,000        
Debt issued by subsidiaries 0        
Guarantees of company debt 0        
Maximum [Member]
          
Line of Credit Facility [Line Items]          
Amount available for issuance of letters of credit from revolving credit facility 25,000,000        
Operating cash flow ratio 6.0        
Non-cash charge excluded from covenant calculation per amendment to the unsecured revolving credit agreement $ 12,000,000        
Minimum [Member]
          
Line of Credit Facility [Line Items]          
Fixed charges ratio 1.5