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Employee Benefit Plans (Schedule of Changes in Level 3 Assets) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Balance $ 6,136
Balance 6,853
Level 3 [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Balance 601
Realized gain 187
Sales (610)
Unrealized gain (loss) (178)
Balance