Employee Benefit Plans (Schedule Of Liabilities Recorded) (Details) - Other Postretirement Benefit Plans, Defined Benefit [Member] - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Current portion	$ 93	$ 93
Long-term portion	737	805
Total liability at December 31	$ 830	$ 898