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Pensions and Other Employee Benefits Plans (Benefit Payments Expected to be Paid) (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Pension Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2020 $ 2,103
2021 2,267
2022 2,368
2023 2,527
2024 2,770
2025 to 2029 14,831
Gross Benefit Payments [Member] | Other Benefits [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2020 78
2021 68
2022 58
2023 50
2024 41
2025 to 2029 $ 128