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Share-Based Compensation And Stock Repurchase Plans (Schedule Of Restricted Stock Units Issued And Vested) (Details) - Restricted Stock Units (RSUs) [Member] - shares
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 1,561,690 295,549
Number of options, Vesting 740,078 287,958
Number of options, Unvested 783,063
Number of options, Forfeited 38,549 7,591
Award Date 1 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 287,163  
Number of options, Vesting 211,679  
Number of options, Unvested 48,402  
Number of options, Forfeited 27,082  
Award Date 2 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 43,260  
Number of options, Vesting 42,084  
Number of options, Forfeited 1,176  
Award Date 3 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 71,543  
Number of options, Vesting 71,543  
Award Date 4 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 262,830  
Number of options, Vesting 45,403  
Number of options, Unvested 217,427  
Award Date 5 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 22,888  
Number of options, Vesting 5,536  
Number of options, Unvested 15,855  
Number of options, Forfeited 1,497  
Award Date 6 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 26,924  
Number of options, Vesting 26,924  
Award Date 7 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 48,951  
Number of options, Vesting 48,951  
Award Date 8 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 428,899  
Number of options, Unvested 427,696  
Number of options, Forfeited 1,203  
Award Date 9 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 73,683  
Number of options, Unvested 73,683  
Directors [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 339,438 129,796
Directors [Member] | Award Date 3 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 60,084  
Directors [Member] | Award Date 6 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 26,924  
Directors [Member] | Award Date 7 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 48,951  
Directors [Member] | Award Date 9 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 73,683  
Management [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 1,222,252 165,753
Management [Member] | Award Date 1 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 287,163  
Management [Member] | Award Date 2 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 43,260  
Management [Member] | Award Date 3 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 11,459  
Management [Member] | Award Date 4 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 262,830  
Management [Member] | Award Date 5 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 22,888  
Management [Member] | Award Date 8 [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of options, Granted 428,899