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Employee Benefit Plans (Schedule of Net Pension Costs) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]      
Service cost – benefits earned during the period $ 0 $ 0 $ 0
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost – benefits earned during the period 0 0 0
Interest cost on projected benefit obligation 1,482 1,312 1,449
Expected return on plan assets (1,562) (1,115) (2,810)
Net amortization and deferral 977 34 244
Net periodic pension cost (income) 897 231 (1,117)
SERP      
Defined Benefit Plan Disclosure [Line Items]      
Service cost – benefits earned during the period 0 124 118
Interest cost on projected benefit obligation 219 200 227
Net amortization and deferral (163) (13) (34)
Net periodic pension cost (income) $ 56 $ 311 $ 311