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Employee Benefit Plans (Expected Benefit Payments) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
General Discussion of Pension and Other Postretirement Benefits [Abstract]  
2015 $ 2,335
2016 2,397
2017 2,467
2018 2,560
2019 2,661
2020-2024 $ 13,897