Pension And Other Liabilities (Schedule Of The Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension And Other Liabilities [Abstract]
Interest cost	$ 262	$ 483
Amortization of prior service costs
Amortization of net actuarial gain	152	151
Net periodic benefit cost	414	634
Amortization of net loss	(152)	(151)
Total recognized in other comprehensive income	(152)	(151)
Total recognized in net periodic benefit cost and other comprehensive income	$ 262	$ 483