Derivative Instruments And Hedging Activities (Schedule Of Derivative Instruments In Consolidated Statements Of Operations) (Details) - Cash Flow Interest Rate Contracts [Member] - Interest Expense [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain /(Loss) recognized in OCI (effectiveness)	$ 124	$ (981)	$ (1,399)	$ (1,659)
Loss reclassified from OCI into income	$ 1,046	$ 1,569	$ 2,207	$ 3,267