Hedging Activities, Derivative Instruments And Credit Risk (Schedule Of Gains And Losses On Derivatives Designated As Cash Flow Hedges) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Hedging Activities, Derivative Instruments And Credit Risk [Abstract]
Amount of loss recognized in accumulated other comprehensive income ("AOCI") on derivatives (effective portion)	$ (368)	[1]	$ (2,399)	[1]
Amount of loss reclassified from AOCI into income (effective portion)	(1,068)	[1]	(1,298)	[1]
Amount of loss recognized in income on derivatives (ineffective portion and amount excluded from effectiveness testing)	$ (1)	[1]	$ (5)	[1]

[1] Losses on derivatives reclassified from AOCI into income (effective portion) were included in the interest expense line on the face of the Consolidated Statements of Operations.