Fair Value Measurement (Schedule Of Assets and Liabilities Carried and Measured At Fair Value) (Details) - Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Investments	$ 51	$ 54
Assets, Derivatives	1
Liabilities, Derivatives	(156)	(2,177)
Total recorded at fair value	(104)	(2,123)
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Investments	51	54
Total recorded at fair value	51	54
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Derivatives	1
Liabilities, Derivatives	(156)	(2,177)
Total recorded at fair value	$ (155)	$ (2,177)