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Employee Benefit Plans (Schedule of Reconciliation of Benefit Obligation) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Change in benefit obligation      
Service cost $ 0 $ 0 $ 0
Change in plan assets      
Plan assets at beginning of year 39,170    
Plan assets at end of year 43,824 39,170  
Pension Plan      
Change in benefit obligation      
Benefit obligation at beginning of year 36,354 38,150 36,840
Service cost 0 0 0
Interest cost 1,482 1,312 1,449
Actuarial loss (gain) 5,492 (1,160) 1,941
Benefits paid (1,736) (1,948) (2,080)
Benefit obligation at end of year 41,592 36,354 38,150
Change in plan assets      
Plan assets at beginning of year 39,170 41,306 36,950
Actual return on plan assets 6,390 (188) 6,436
Employer contributions 0 0 0
Benefits paid (1,736) (1,948) (2,080)
Plan assets at end of year 43,824 39,170 41,306
Funded status at end of year 2,232 2,816 3,156
SERP      
Change in benefit obligation      
Benefit obligation at beginning of year 5,794 5,970 5,910
Service cost 0 124 118
Interest cost 219 200 227
Actuarial loss (gain) 23 (102) 85
Benefits paid (398) (398)  
Benefit obligation at end of year 5,638 5,794 5,970
Change in plan assets      
Plan assets at beginning of year 0 0  
Benefits paid (398) (398) (370)
Plan assets at end of year 0 0 0
Funded status at end of year $ (5,638) $ (5,794) $ (5,970)