Pension And Other Liabilities (Schedule Of Change In Pension Benefit Obligation And Funded Status) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension And Other Liabilities [Abstract]
Benefit obligation at beginning of period	$ 5,153,000	$ 5,354,000
Service cost	0	0
Interest cost	262,000	482,000
Payments made	(683,000)	(683,000)
Benefit obligation at end of period	4,732,000	5,153,000
Unfunded status at end of period	$ (4,732,000)	$ (5,153,000)