Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 32,797	$ 33,010
Less accumulated amortization	(16,148)	(13,594)
Intangible assets, net	16,649	19,416
Customer Lists And Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	25,928	26,047
Product Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	4,659	4,753
Trade Names and Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,263	1,263
Core Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 947	$ 947