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Employee Benefit Plans (Schedule of Changes in Level 3 Assets) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year $ 7,110 $ 6,702
Balacne at end of year 6,136 7,110
Significant Unobservable Inputs (Level 3) [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of year 255 283
Unrealized gain (loss) 346 (28)
Balacne at end of year $ 601 $ 255