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		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts reclassified from AOCI into income	$ 53	$ 65	$ 166	$ 202
Income Tax Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts reclassified from AOCI into income	(23)	(24)	(68)	(74)
Gain (Loss) - Net Of Tax [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amounts reclassified from AOCI into income	$ 30	$ 41	$ 98	$ 128