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Employee Benefit Plans (Actuarial Assumptions Used, Net Periodic Pension Cost) (Details)
3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Pension Plans And Defined Benefit Postretirement Plans Disclosure [Abstract]      
Weighted average discount rate 3.49% 4.00% 4.21%
Rate of compensation increase 3.00% 3.00% 3.00%
Expected long-term rate of return 6.50% 6.50% 6.50%