Employee Benefit Plans (Schedule Of Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Net loss	$ 1,143	$ 82	$ 1,719
Amortization of net loss	(1,228)	(1,475)	(1,552)
Total recognized in other comprehensive (income) loss	(85)	(1,393)	167
Total recognized in net periodic benefit cost and other comprehensive (income) loss	767	$ 213	$ 2,103
Defined benefit plan, estimated amortization of net loss in next fiscal year	$ 1,200