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Employee Benefit Plans (Net Periodic Pension Cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Retirement Benefits [Abstract]      
Defined Benefit Plan, Non-Service Cost $ 1,300    
Service cost 1,010 $ 675 $ 603
Interest cost on projected benefit obligation 3,130 2,806 2,773
Expected return on plan assets (4,725) (5,418) (5,300)
Amortization of loss 2,881 2,689 2,835
Net periodic pension cost $ 2,296 $ 752 $ 911