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Debt - Summary of Debt (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Dec. 30, 2012
Jul. 01, 2012
Debt Instrument [Line Items]      
Maturity 2019    
Total debt $ 55,000 $ 30,000 $ 0
Total debt 20,000 20,000 0
Total debt 448,475 423,386 523,301
Less: Current portion of debt 20,000 20,000 120,000
Long-term debt 428,475 403,386 403,301
Revolving Credit Facility [Member]
     
Debt Instrument [Line Items]      
Maturity 2016    
Interest Rate, Term Variable    
Interest Paid Varies    
Total debt 55,000 30,000 0
Line of Credit [Member]
     
Debt Instrument [Line Items]      
Maturity 2013    
Interest Rate, Term Variable    
Interest Paid Varies    
Total debt 20,000 20,000 0
5.00% Senior Notes 2012 [Member]
     
Debt Instrument [Line Items]      
Maturity 2012    
Interest Rate 5.00%    
Interest Paid Semi-annually    
Total debt 0 0 150,000
5.30% Senior Notes 2015 [Member]
     
Debt Instrument [Line Items]      
Maturity 2015    
Interest Rate 5.30%    
Interest Paid Semi-annually    
Total debt 100,000 100,000 100,000
5.00% Senior Notes 2016 [Member]
     
Debt Instrument [Line Items]      
Maturity 2016    
Interest Rate 5.00%    
Interest Paid Semi-annually    
Total debt 164,757 164,757 164,757
7.00% Senior Notes 2019 [Member]
     
Debt Instrument [Line Items]      
Maturity 2019    
Interest Rate 7.00%    
Interest Paid Semi-annually    
Total debt 110,000 110,000 110,000
Unamortized discount on Senior Notes $ (1,282) $ (1,371) $ (1,456)