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Benefit Plans - A 1% Increase or Decrease in Annual Health Care Cost (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 29, 2013
Compensation And Retirement Disclosure [Abstract]  
Postretirement benefit obligation 1% Increase $ 7,830
Postretirement benefit obligation 1% Decrease (7,168)
Service cost and interest cost 1% Increase 578
Service cost and interest cost 1% Decrease $ (533)