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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, 2021
Dec. 31, 2020
Dec. 31, 2019
Changes in Plan Assets:      
Fair value of plan assets at beginning of period $ 140,650    
Fair value of plan assets at end of year 136,874 $ 140,650  
United States      
Changes in Benefit Obligation:      
Net benefit obligation at beginning of period 140,254 135,810  
Service cost 1,328 1,322 $ 1,297
Interest cost 2,962 3,949 5,070
Participant contributions 0 0  
Foreign currency exchange changes 0 0  
Actuarial (gain) loss (4,316) 9,583  
Benefits paid 10,322 10,410  
Net benefit obligation at end of period 129,906 140,254 135,810
Changes in Plan Assets:      
Fair value of plan assets at beginning of period 115,568 107,832  
Actual return on plan assets 2,325 13,700  
Foreign currency exchange rate changes 0 0  
Employer contributions 2,390 4,446  
Participant contributions 0 0  
Benefits paid (10,322) (10,410)  
Fair value of plan assets at end of year 109,961 115,568 107,832
Funded status (underfunded): (19,945) (24,686)  
Non-current assets 0 0  
Current liabilities (420) (423)  
Non-current liabilities (19,525) (24,263)  
Net amount recognized (19,945) (24,686)  
Foreign [Member]      
Changes in Benefit Obligation:      
Net benefit obligation at beginning of period 38,716 28,903  
Service cost 1,349 1,183 624
Interest cost 111 174 275
Participant contributions 580 470  
Foreign currency exchange changes (1,318) 2,869  
Actuarial (gain) loss (1,104) 2,683  
Benefits paid 237 2,434  
Net benefit obligation at end of period 38,571 38,716 28,903
Changes in Plan Assets:      
Fair value of plan assets at beginning of period 25,082 18,980  
Actual return on plan assets 799 488  
Foreign currency exchange rate changes (746) 1,893  
Employer contributions 961 817  
Participant contributions 580 470  
Benefits paid (237) (2,434)  
Fair value of plan assets at end of year 26,913 25,082 $ 18,980
Funded status (underfunded): (11,658) (13,634)  
Non-current assets 0 13  
Current liabilities (44) (50)  
Non-current liabilities (11,614) (13,597)  
Net amount recognized $ (11,658) $ (13,634)