Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 17,338	$ 16,980
Less accumulated amortization	(7,889)	(7,211)
Intangible assets, net	9,449	9,769
Customer Lists And Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	14,142	13,942
Product Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	2,249	2,091
Core Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 947	$ 947