Goodwill And Other Intangible Assets (Schedule Of Intangible Assets With Determinable Useful Lives By Major Category) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Intangible Assets
Gross Carrying Amount	$ 142,300	$ 142,300
Accumulated Amortization	(83,207)	(80,616)
Net Carrying Amount	59,093	61,684
Trade Names
Intangible Assets
Gross Carrying Amount	22,500	22,500
Accumulated Amortization	(14,425)	(13,935)
Net Carrying Amount	8,075	8,565
Technology Know-How
Intangible Assets
Gross Carrying Amount	55,300	55,300
Accumulated Amortization	(39,505)	(38,486)
Net Carrying Amount	15,795	16,814
Customer-Related Intangible Assets
Intangible Assets
Gross Carrying Amount	64,500	64,500
Accumulated Amortization	(29,277)	(28,195)
Net Carrying Amount	$ 35,223	$ 36,305