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Retirement Plans - Defined Benefit Plan, Net Periodic Benefit Cost (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
United States [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost   $ 568 $ 450
Interest cost $ 29 6,491 6,829
Expected return on plan assets   (6,833) (10,298)
Settlement loss 27 45,157 155
Net amortization: Net actuarial loss   3,082 2,770
Net periodic pension cost 56 48,465 (94)
United States [Member] | Retiree Healthcare Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 499 566 546
Interest cost 777 636 618
Expected return on plan assets (706) (706) (587)
Net amortization: Prior service credit (19) (19)  
Net periodic pension cost 551 477 577
Non-U.S. Pension Plans [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 4,339 5,368 5,082
Interest cost 1,735 1,707 1,518
Expected return on plan assets (2,154) (1,974) (1,688)
Settlement loss 1,548   232
Net amortization: Prior service credit (108) (108) (168)
Net amortization: Net actuarial loss 531 680 959
Net periodic pension cost $ 5,891 $ 5,673 $ 5,935