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, 2017	Dec. 31, 2016
Pension And Other Liabilities [Abstract]
Interest cost	$ 180	$ 180
Amortization of net actuarial gain	127	129
Net periodic benefit cost	307	309
Amortization of net loss	(127)	(129)
Total recognized in other comprehensive income	(127)	(129)
Total recognized in net periodic benefit costs and other comprehensive income	$ 180	$ 180