Income Taxes (Schedule Of Uncertain Tax Position Liability And Liability For Interest And Penalties On Uncertain Tax Positions) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Beginning balance	$ 2,100	$ 2,004	$ 1,788
Increases related to current year tax positions	92	281	231
Decreases related to prior year tax positions	(265)	(185)	(15)
Decreases due to the lapsing of statutes of limitations	(490)
Ending balance	1,437	2,100	2,004
Beginning Balance	422	489	418
Accrual of interest and penalties	91	66	79
Decreases related to prior year tax positions	(147)	(133)	(8)
Ending Balance	$ 366	$ 422	$ 489