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Schedule of Net Periodic Pension and Postretirement (income) Cost (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Apr. 01, 2018
UNITED STATES    
Defined Benefit Plan Disclosure    
Service cost $ 405 $ 571
Interest cost 1,795 2,997
Expected return on plan assets (1,511) (3,369)
Amortization of prior service cost   14
Total net periodic pension cost 689 213
Foreign Pension Plans, Defined Benefit    
Defined Benefit Plan Disclosure    
Service cost 188 213
Interest cost 173 186
Expected return on plan assets (7) (5)
Total net periodic pension cost 354 394
Postretirement Benefit Plans    
Defined Benefit Plan Disclosure    
Service cost 9 9
Interest cost 85 50
Amortization of prior service cost (48) (93)
Special termination benefits   1,626
Total net periodic pension cost $ 46 $ 1,592