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Retirement Plans - Defined Benefit Plan, Net Periodic Benefit Cost (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
United States [Member] | Pension Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 142 $ 113 $ 426 $ 338
Interest cost 1,622 1,707 4,868 5,122
Expected return on plan assets (1,708) (2,574) (5,123) (7,724)
Net amortization: Net actuarial loss 771 693 2,312 2,078
Net periodic pension cost (benefit) 827 (61) 2,483 (186)
United States [Member] | Healthcare Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 142 137 425 410
Interest cost 159 155 477 464
Expected return on plan assets (177) (146) (530) (440)
Net amortization: Prior service (credit) cost (4)   (14)  
Net periodic pension cost (benefit) 120 146 358 434
Non-U.S. Pension Plans [Member] | Pension Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 1,311 1,311 4,024 3,802
Interest cost 406 386 1,250 1,112
Expected return on plan assets (486) (434) (1,442) (1,250)
Net amortization: Prior service (credit) cost (30) (47) (93) (140)
Net amortization: Net actuarial loss 167 248 515 714
Net periodic pension cost (benefit) $ 1,368 $ 1,464 $ 4,254 $ 4,238