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, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Net loss	$ 1,719	$ 1,276	$ 11,118
Amortization of net loss (1)	(1,552)	(1,423)	(385)
Total recognized in other comprehensive loss (income)	167	(147)	10,733
Total recognized in net periodic benefit costs and other comprehensive loss	2,103	$ 1,262	$ 10,967
Defined benefit plan, estimated amortization of net loss in next fiscal year	$ 1,500