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Schedule of Net Periodic Pension and Postretirement Cost (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 05, 2015
Jun. 29, 2014
Jul. 05, 2015
Jun. 29, 2014
United States Pension Plans, Defined Benefit        
Defined Benefit Plan Disclosure        
Service cost $ 615 $ 563 $ 1,231 $ 1,109
Interest cost 3,289 3,223 6,571 6,438
Expected return on plan assets (3,634) (3,125) (7,259) (6,250)
Amortization of prior service cost (benefit) 34 34 67 67
Actuarial (gain) loss (3) 362 (3) 362
Total net periodic 301 1,057 607 1,726
Foreign Pension Plans, Defined Benefit        
Defined Benefit Plan Disclosure        
Service cost 263 248 510 498
Interest cost 385 509 744 1,014
Expected return on plan assets (215) (259) (410) (475)
Total net periodic 433 498 844 1,037
Postretirement Benefit Plans        
Defined Benefit Plan Disclosure        
Service cost 12 17 24 29
Interest cost 59 82 118 168
Amortization of prior service cost (benefit) (150) (150) (299) (299)
Actuarial (gain) loss (19) (247) (19) (247)
Total net periodic $ (98) $ (298) $ (176) $ (349)