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Employee Benefit Plans (Schedule of Reconciliation of Balances in AOCI) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Net (loss) gain arising during period $ (686) $ (41) $ 1,601
Amortization of unrecognized actuarial gain (loss) 814 21 211
Pension Plan      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Accumulated other comprehensive income (loss) at beginning of fiscal year (3,091) (2,909)  
Net (loss) gain arising during period (664) (143)  
Amortization of unrecognized actuarial gain (loss) 977 34  
Tax (expense) benefit of changes during the year, net (88) (73)  
Accumulated other comprehensive income (loss) at end of fiscal year (2,866) (3,091) (2,909)
SERP      
AOCI Attributable to Parent, Net of Tax [Roll Forward]      
Accumulated other comprehensive income (loss) at beginning of fiscal year 624 457  
Net (loss) gain arising during period (22) 102  
Prior service cost 0 0  
Amortization of unrecognized actuarial gain (loss) (163) (13)  
Amortization of prior service cost and transition obligation 0 0  
Tax (expense) benefit of changes during the year, net 45 78  
Accumulated other comprehensive income (loss) at end of fiscal year $ 484 $ 624 $ 457