Derivative Instruments And Hedging Activities (Schedule Of Effects Of Cash Flow Hedges On Income Statement And AOCI) (Details) - Interest Rate Swap [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount Reclassified from AOCI into income	$ 55	$ 68	$ 113	$ 137
Income Tax Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount Reclassified from AOCI into income	(23)	(22)	(45)	(50)
Gain (Loss) - Net Of Tax [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount Reclassified from AOCI into income	$ 32	$ 46	$ 68	$ 87