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Business Segments (Schedule Of Identifiable Assets By Geographic Area, Property, Plant & Equipment, Net By Geographic Area) (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information [Line Items]    
Identifiable Assets by Geographic Area, Total $ 356,357 $ 446,461
Property, Plant & Equipment, Net by Geographic Area, Total 137,032 151,157
Cash, Cash Equivalents, and Federal Funds Sold 7,062 13,051
Property, Plant & Equipment, Net of Discontinued operations by Geographic Area, Total 137,032 183,455
Discontinued operations 126 84,466
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment 0 32,298
United States    
Segment Reporting Information [Line Items]    
Identifiable Assets by Geographic Area, Total 294,303 302,037
Property, Plant & Equipment, Net by Geographic Area, Total 127,992 139,552
General corporate    
Segment Reporting Information [Line Items]    
Identifiable Assets by Geographic Area, Total 46,883 36,652
Property, Plant & Equipment, Net by Geographic Area, Total 1,823 2,244
Operations Outside The United States | China    
Segment Reporting Information [Line Items]    
Identifiable Assets by Geographic Area, Total 7,983 10,255
Property, Plant & Equipment, Net by Geographic Area, Total $ 7,217 $ 9,361