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Employee Benefits - Estimated Future Benefit Payments (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Postretirement Benefit Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2021 $ 3,737
2022 3,748
2023 3,735
2024 3,840
2025 3,900
2026 - 2030 19,351
Required Company Contributions in Following Year (2021) 3,737
U.S Plans [Member] | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2021 38,308
2022 38,888
2023 39,373
2024 39,761
2025 39,552
2026 - 2030 192,040
Required Company Contributions in Following Year (2021) 4,364
Non-U.S. Plans [Member] | Pension Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2021 29,364
2022 29,406
2023 30,150
2024 31,243
2025 32,774
2026 - 2030 180,230
Required Company Contributions in Following Year (2021) $ 24,964