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Benefit Plans - Reconciliation of Beginning and Ending Balances of Accrued Liability (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 29, 2013
Dec. 30, 2012
Defined Benefit Plan Disclosure [Line Items]    
Noncurrent liabilities $ (90,599) $ (140,719)
Postretirement Benefits [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Current liabilities (2,682) (2,653)
Noncurrent liabilities (65,158) (67,175)
Accrued liability at end of year $ (67,840) $ (69,828)