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Retirement Plans And Postretirement Benefits (Reconciliation Of Pension Plans' Benefit Obligations, Fair Value Of Assets Retirement Plans) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Changes in Plan Assets:      
Fair value of plan assets at beginning of period $ 107,714    
Fair value of plan assets at end of year 108,377 $ 107,714  
United States      
Changes in Benefit Obligation:      
Net benefit obligation at beginning of period 99,993 129,906  
Service cost 1,483 1,390 $ 1,328
Interest cost 4,722 3,242 2,962
Participant contributions 0 0  
Plan settlements 0 0  
Foreign currency exchange changes 0 0  
Actuarial loss (gain) 1,516 (24,202)  
Benefits paid (10,392) (10,343)  
Net benefit obligation at end of period 97,322 99,993 129,906
Changes in Plan Assets:      
Fair value of plan assets at beginning of period 80,006 109,961  
Actual return on plan assets 8,382 (20,061)  
Foreign currency exchange rate changes 0 0  
Plan settlements 0 0  
Employer contributions 400 449  
Participant contributions 0 0  
Benefits paid (10,392) (10,343)  
Fair value of plan assets at end of year 78,396 80,006 109,961
Funded status (underfunded): (18,926) (19,987)  
Other accrued liabilities (324) (409)  
Other long-term obligations (18,602) (19,578)  
Net amount recognized (18,926) (19,987)  
Foreign      
Changes in Benefit Obligation:      
Net benefit obligation at beginning of period 31,065 38,571  
Service cost 1,053 1,220 1,349
Interest cost 870 227 111
Participant contributions 501 557  
Plan settlements (1,609) 0  
Foreign currency exchange changes 2,983 (660)  
Actuarial loss (gain) 3,694 (7,293)  
Benefits paid (1,076) (1,557)  
Net benefit obligation at end of period 37,481 31,065 38,571
Changes in Plan Assets:      
Fair value of plan assets at beginning of period 27,708 26,913  
Actual return on plan assets 645 1,148  
Foreign currency exchange rate changes 2,609 (325)  
Plan settlements (1,609) 0  
Employer contributions 1,203 972  
Participant contributions 501 557  
Benefits paid (1,076) (1,557)  
Fair value of plan assets at end of year 29,981 27,708 $ 26,913
Funded status (underfunded): (7,500) (3,357)  
Other accrued liabilities (34) (167)  
Other long-term obligations (7,466) (3,190)  
Net amount recognized $ (7,500) $ (3,357)