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Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Pension plan assets $ 53,558 $ 61,936
Contingent consideration 9,549 4,609
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Pension plan assets 0 0
Contingent consideration 0 0
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Pension plan assets   0
Contingent consideration 0 0
Level 2 | Recurring    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Pension plan assets 0  
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Pension plan assets   61,936
Contingent consideration 9,549 $ 4,609
Level 3 | Recurring    
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Pension plan assets $ 53,558