XML 111 R96.htm IDEA: XBRL DOCUMENT v3.20.4
Retirement Plans - Defined Benefit Plan, Net Periodic Benefit Cost (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
United States [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 0   $ 568
Interest cost 0 $ 29 6,491
Expected return on plan assets 0   (6,833)
Settlement loss 0 27 45,157
Net amortization: Prior service credit 0    
Net amortization: Net actuarial loss 0   3,082
Net periodic pension cost 0 56 48,465
United States [Member] | Retiree Healthcare Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 665 499 566
Interest cost 711 777 636
Expected return on plan assets (871) (706) (706)
Settlement loss 0    
Net amortization: Prior service credit (19) (19) (19)
Net amortization: Net actuarial loss 0    
Net periodic pension cost 486 551 477
Non-U.S. Pension Plans [Member] | Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 4,519 4,339 5,368
Interest cost 1,413 1,735 1,707
Expected return on plan assets (1,874) (2,154) (1,974)
Settlement loss 235 1,548  
Net amortization: Prior service credit (163) (108) (108)
Net amortization: Net actuarial loss 1,571 531 680
Net periodic pension cost $ 5,701 $ 5,891 $ 5,673