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Employee Benefits - Plan Assets and Benefit Obligations of Defined Benefit Pension Plans (Detail) - Pension Plan [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
U.S Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost for benefits earned(1) $ 1,283 $ 1,378 $ 1,971
Interest cost on projected benefit obligation(2) 17,261 21,954 19,393
Expected return on plan assets(2) (28,322) (27,927) (30,994)
Net amortization of deferrals(2) 7,939 5,464 6,592
Settlements and curtailments(2) 0 0 0
Net periodic benefit cost (1,839) 869 (3,038)
Defined contribution and other retirement plans 12,428 9,363 10,527
Total expense 10,589 10,232 7,489
Net actuarial loss (gain) (1,204) (3,140)  
Recognized actuarial loss (7,883) (5,421)  
Prior service cost 102 0  
Recognized prior service (cost) credit (56) (43)  
Currency translation adjustment 0 0  
Total (gain) loss recognized in OCI (before tax effects) (9,041) (8,604)  
Non-U.S. Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost for benefits earned(1) 23,952 19,319 18,738
Interest cost on projected benefit obligation(2) 12,767 17,775 17,704
Expected return on plan assets(2) (45,919) (43,480) (50,546)
Net amortization of deferrals(2) 15,322 11,654 11,798
Settlements and curtailments(2) 4,473 189 0
Net periodic benefit cost 10,595 5,457 (2,306)
Defined contribution and other retirement plans 7,344 9,001 6,859
Total expense 17,939 14,458 $ 4,553
Net actuarial loss (gain) 69,945 61,865  
Recognized actuarial loss (20,437) (12,479)  
Prior service cost 367 0  
Recognized prior service (cost) credit 642 636  
Currency translation adjustment 27,605 6,584  
Total (gain) loss recognized in OCI (before tax effects) $ 78,122 $ 56,606