Employee Benefit Plans (Summary Of Activity Within The Defined Benefit Plan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Change in fair value of plan assets:
Fair value at beginning of measurement period	$ 12,041	$ 16,360
Actual gain (loss) on plan assets	880	(434)
Contributions by employer	0	1,509
Defined Benefit Plan, Plan Assets, Benefits Paid	1,037	5,394
Fair value at End of measurement period	11,884	12,041	$ 16,360
Change in benefit obligation:
Benefit obligation at beginning of measurement period	(14,222)	(18,488)
Interest cost	(561)	(590)	(772)
Actuarial loss	(21)	(1,488)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change	(1,452)	825
Benefits paid	(1,037)	(5,394)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement	0	125
Benefit obligation at end of measurement period	(15,219)	(14,222)	$ (18,488)
Funded status	(3,335)	(2,181)
Other comprehensive loss	$ (6,270)	$ (5,871)
Weighted-average assumptions for benefit cost at beginning of year, Discount rate	3.05%	4.10%
Weighted-average assumptions for balance sheet liability at end of year, Expected long-term rate of return	6.75%	6.75%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.10%	3.38%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.75%	6.56%