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Summary of Company's Balance Sheet Related Pension and Other Postretirement Benefit Plan (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 04, 2014
Dec. 28, 2013
Post-Retirement Plans [Abstract]    
Current benefit liability $ 1,301 $ 1,301
Noncurrent benefit liability 22,048 44,226
Accumulated other comprehensive loss, net of tax $ 50,684 $ 51,099