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Employee Benefit Plans (Benefit Payments, Expected Future Service) (Detail)
$ in Thousands
Dec. 31, 2019
USD ($)
Defined Benefit Plan Estimated Future Benefit Payments [Abstract]  
2020 $ 15,459
2021 16,225
2022 16,427
2023 16,650
2024 16,717
Five years thereafter $ 80,264