Business Segments (Schedule Of Identifiable Assets By Geographic Area, Property, Plant & Equipment, Net By Geographic Area) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	$ 446,461	$ 542,093
Property, Plant & Equipment, Net by Geographic Area, Total	183,455	186,411
Cash, Cash Equivalents, and Federal Funds Sold	13,455	19,232
Property, Plant & Equipment, Net of Discontinued operations by Geographic Area, Total	183,455	186,411
United States
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	320,604	413,512
Property, Plant & Equipment, Net by Geographic Area, Total	143,729	146,437
General corporate
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	36,652	23,674
Property, Plant & Equipment, Net by Geographic Area, Total	2,244	2,686
Operations Outside The United States | Brazil
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	65,495	72,725
Property, Plant & Equipment, Net by Geographic Area, Total	28,121	25,385
Operations Outside The United States | China
Segment Reporting Information [Line Items]
Identifiable Assets by Geographic Area, Total	10,255	12,950
Property, Plant & Equipment, Net by Geographic Area, Total	$ 9,361	$ 11,903