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Debt - Additional Information (Detail) (USD $)
 1 Months Ended 9 Months Ended 3 Months Ended
Sep. 21, 2011
Sep. 29, 2013
Sep. 30, 2012
Sep. 04, 2013
Dec. 30, 2012
Feb. 10, 2010
Sep. 29, 2013
Minimum [Member]
Sep. 29, 2013
Maximum [Member]
Line of Credit Facility [Line Items]                
Unsecured revolving credit agreement $ 200,000,000 $ 200,000,000   $ 200,000,000        
Period of Unsecured revolving credit agreement 5 years              
Maturity date of unsecured revolving credit agreement Sep. 21, 2016 Sep. 21, 2016            
Amount available for issuance of letters of credit from revolving credit facility   25,000,000            
Annual facility fee   0.175%            
Fixed charges ratio             1.5  
Operating cash flow ratio               6.0
Maximum non-cash charge excluded from covenant calculation per amendment to the unsecured revolving credit agreement               12,000,000
Outstanding borrowings on unsecured revolving credit agreement   20,000,000 0   30,000,000      
Available to meet its cash requirements under revolving credit facility   180,000,000            
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 0   20,000,000      
Uncommitted line of credit, weighted average interest rate   0.93%     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   6.10% 6.10%   5.90%      
Overall weighted average interest rate on debt and capital lease obligations   5.80% 6.10%          
Debt and capital lease obligations subject to changes in short-term interest rates   40,000,000            
Debt and capital lease obligations   479,600,000            
Debt issued by subsidiaries   0            
Guarantees of company debt   $ 0