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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain /(Loss) recognized in OCI (effectiveness)	$ (1,418)	$ 340	$ (2,816)	$ (1,318)
Loss reclassified from OCI into income	$ 853	$ 1,461	$ 3,060	$ 4,728