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Employee Benefit Plans (Schedule of Expected Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Pension Benefits [Member]  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
2019 $ 3,360
2020 3,338
2021 3,299
2022 3,291
2023 3,270
2024 through 2028 15,812
Postretirement Benefit Plan [Member]  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
2019 395
2020 390
2021 386
2022 383
2023 382
2024 through 2028 $ 1,823