Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 40,624	$ 40,840
Less accumulated amortization	(22,487)	(21,424)
Intangible assets, net	18,137	19,416
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	31,810	31,930
Product Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	6,604	6,700
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