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Revenue Recognition (Schedule Of Contract Assets And Liabilities) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Opening [Member]    
Contract Receivables and Liabilities [Line Items]    
Receivables $ 1,351 $ 1,269
Contract Liabilities 2,417 2,986
Closing [Member]    
Contract Receivables and Liabilities [Line Items]    
Receivables 638 586
Contract Liabilities 2,185 2,937
Decrease [Member]    
Contract Receivables and Liabilities [Line Items]    
Receivables (713) (683)
Contract Liabilities $ (232) $ (49)