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Retirement Plans - Defined Benefit Plan, Net Periodic Benefit Cost (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
United States [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 568 $ 450 $ 377
Interest cost 6,491 6,829 6,931
Expected return on plan assets (6,833) (10,298) (9,635)
Settlement loss 45,157 155  
Net amortization: Net actuarial loss 3,082 2,770 2,702
Net periodic pension cost (benefit) 48,465 (94) 375
United States [Member] | Retiree Healthcare Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 566 546 473
Interest cost 636 618 557
Expected return on plan assets (706) (587) (519)
Net amortization: Prior service credit (19)    
Net periodic pension cost (benefit) 477 577 511
Non-U.S. Pension Plans [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 5,368 5,082 4,954
Interest cost 1,707 1,518 1,699
Expected return on plan assets (1,974) (1,688) (1,596)
Settlement loss   232  
Net amortization: Prior service credit (108) (168) (192)
Net amortization: Net actuarial loss 680 959 753
Net periodic pension cost (benefit) $ 5,673 $ 5,935 $ 5,618