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Minimum Lease Payments (Parenthetical) (Detail)
12 Months Ended
Dec. 29, 2012
Minimum
 
Capital Leases And Operating Leases [Line Items]  
Capital leases, future minimum payments, interest included in payments, interest rate 2.10%
Maximum
 
Capital Leases And Operating Leases [Line Items]  
Capital leases, future minimum payments, interest included in payments, interest rate 5.00%