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Benefit Plans - Net Periodic Pension Cost (Benefit) (Detail) (Pension Plans [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 29, 2014
Jun. 30, 2013
Jun. 29, 2014
Jun. 30, 2013
Pension Plans [Member]
       
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 29 $ 32 $ 58 $ 64
Interest cost 2,896 3,086 5,792 6,172
Expected return on plan assets (3,456) (3,547) (6,913) (7,094)
Amortization of prior service cost 9 4 18 8
Recognized net actuarial loss 422 838 844 1,676
Net periodic pension cost (benefit) $ (100) $ 413 $ (201) $ 826