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Employee Benefit Plans (Future Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
2017 $ 7,150
2018 7,237
2019 7,309
2020 7,512
2021 7,530
2022 - 2026 $ 37,041