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Benefit Plans - Net Periodic Pension Cost (Benefit) (Detail) (Pension Plans [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 30, 2014
Mar. 31, 2013
Pension Plans [Member]
   
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 29 $ 32
Interest cost 2,896 3,086
Expected return on plan assets (3,457) (3,547)
Amortization of prior service cost 9 4
Recognized net actuarial loss 422 838
Net periodic pension cost (benefit) $ (101) $ 413