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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, 2022
Dec. 31, 2021
Dec. 31, 2020
Changes in Plan Assets:      
Fair value of plan assets at beginning of period $ 136,874    
Fair value of plan assets at end of year 107,714 $ 136,874  
United States      
Changes in Benefit Obligation:      
Net benefit obligation at beginning of period 129,906 140,254  
Service cost 1,390 1,328 $ 1,322
Interest cost 3,242 2,962 3,949
Participant contributions 0 0  
Foreign currency exchange changes 0 0  
Actuarial gain (24,202) (4,316)  
Benefits paid (10,343) (10,322)  
Net benefit obligation at end of period 99,993 129,906 140,254
Changes in Plan Assets:      
Fair value of plan assets at beginning of period 109,961 115,568  
Actual return on plan assets (20,061) 2,325  
Foreign currency exchange rate changes 0 0  
Employer contributions 449 2,390  
Participant contributions 0 0  
Benefits paid (10,343) (10,322)  
Fair value of plan assets at end of year 80,006 109,961 115,568
Funded status (underfunded): (19,987) (19,945)  
Current liabilities (409) (420)  
Non-current liabilities (19,578) (19,525)  
Net amount recognized (19,987) (19,945)  
Foreign      
Changes in Benefit Obligation:      
Net benefit obligation at beginning of period 38,571 38,716  
Service cost 1,220 1,349 1,183
Interest cost 227 111 174
Participant contributions 557 580  
Foreign currency exchange changes (660) (1,318)  
Actuarial gain (7,293) (1,104)  
Benefits paid (1,557) 237  
Net benefit obligation at end of period 31,065 38,571 38,716
Changes in Plan Assets:      
Fair value of plan assets at beginning of period 26,913 25,082  
Actual return on plan assets 1,148 799  
Foreign currency exchange rate changes (325) (746)  
Employer contributions 972 961  
Participant contributions 557 580  
Benefits paid (1,557) 237  
Fair value of plan assets at end of year 27,708 26,913 $ 25,082
Funded status (underfunded): (3,357) (11,658)  
Current liabilities (167) (44)  
Non-current liabilities (3,190) (11,614)  
Net amount recognized $ (3,357) $ (11,658)