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Retirement Plans - Defined Benefit Plan, Net Periodic Benefit Cost (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Pension Plans [Member] | United States [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost   $ 142
Interest cost $ 13 1,619
Expected return on plan assets   (2,785)
Net amortization: Net actuarial loss   769
Net periodic pension cost (benefit) 13 (255)
Pension Plans [Member] | Non-U.S. Pension Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 1,082 1,374
Interest cost 434 428
Expected return on plan assets (543) (493)
Net amortization: Prior service credit (37) (31)
Net amortization: Net actuarial loss 135 177
Net periodic pension cost (benefit) 1,071 1,455
Retiree Healthcare Plan [Member] | United States [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 142 132
Interest cost 159 156
Expected return on plan assets (177) (178)
Net amortization: Prior service credit (5) (8)
Net periodic pension cost (benefit) $ 119 $ 102