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Pension Plans And Other Postretirement Benefits (Changes In The Plan Benefit Obligations And Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions $ (29,447) $ (20,333) $ (23,728)
Noncurrent assets 11,494 8,597 2,430
U.S. Pension Plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation at beginning of year 154,579 147,211  
Service cost 7,055 6,755 5,720
Interest cost 9,079 8,559 7,934
Plan amendment 0 1,193  
Actuarial net loss (gain) 26,505 (3,677)  
Benefits paid (6,157) (5,462)  
Benefit obligation at end of year 191,061 154,579 147,211
Fair value of plan assets at beginning of year 112,143 90,141  
Actual return on plan assets 466 13,542  
Employer contributions 22,634 13,922  
Fair value of plan assets at end of year 129,086 112,143 90,141
Funded status (61,975) (42,436)  
Noncurrent assets 0 661  
Current liabilities (2,443) (2,434)  
Noncurrent liabilities (59,532) (40,663)  
Amounts recognized in the consolidated balance sheet, net (61,975) (42,436)  
Net loss 95,031 60,750  
Prior service (cost) credit (892) (586)  
Amounts recognized in accumulated other comprehensive loss, total 94,139 60,164  
U.S. Postretirement Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation at beginning of year 58,770 59,733  
Service cost 1,514 1,336 1,085
Interest cost 3,158 3,277 3,408
Plan amendment 0 0  
Actuarial net loss (gain) 4,324 (2,280)  
Benefits paid (3,283) (3,296)  
Benefit obligation at end of year 64,483 58,770 59,733
Fair value of plan assets at beginning of year 26,623 27,157  
Actual return on plan assets 847 1,101  
Employer contributions 1,716 1,661  
Fair value of plan assets at end of year 25,903 26,623 27,157
Funded status (38,580) (32,147)  
Noncurrent assets 0 0  
Current liabilities (1,800) (1,809)  
Noncurrent liabilities (36,780) (30,338)  
Amounts recognized in the consolidated balance sheet, net (38,580) (32,147)  
Net loss (5,846) (11,520)  
Prior service (cost) credit 27 35  
Amounts recognized in accumulated other comprehensive loss, total (5,819) (11,485)  
Foreign Pension Plans [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation at beginning of year 108,304 102,092  
Service cost 4,510 3,015 2,543
Interest cost 5,881 5,447 5,010
Plan amendment 0 48  
Actuarial net loss (gain) (1,392) 4,832  
Benefits paid (4,095) (4,026)  
Foreign currency translation (1,214) (3,655)  
Benefit obligation at end of year 112,656 108,304 102,092
Fair value of plan assets at beginning of year 103,364 92,456  
Actual return on plan assets 2,364 10,887  
Employer contributions 6,699 6,369  
Employee contributions 662 551  
Foreign currency translation (817) (2,873)  
Fair value of plan assets at end of year 108,177 103,364 92,456
Funded status (4,479) (4,940)  
Noncurrent assets 11,494 7,936  
Current liabilities (384) (373)  
Noncurrent liabilities (15,589) (12,503)  
Amounts recognized in the consolidated balance sheet, net (4,479) (4,940)  
Net loss 32,923 31,559  
Prior service (cost) credit (2,246) (2,162)  
Transition obligation (asset) 10 10  
Amounts recognized in accumulated other comprehensive loss, total 30,687 29,407  
Foreign Postretirement Plan [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation at beginning of year 3,068 2,810  
Service cost 30 25 13
Interest cost 153 146 142
Plan amendment 0 0  
Actuarial net loss (gain) (391) 113  
Benefits paid (213) (174)  
Foreign currency translation (51) 148  
Benefit obligation at end of year 2,596 3,068 2,810
Fair value of plan assets at beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 213 174  
Employee contributions 0 0  
Foreign currency translation 0 0  
Fair value of plan assets at end of year 0 0 0
Funded status (2,596) (3,068)  
Noncurrent assets 0 0  
Current liabilities (206) (163)  
Noncurrent liabilities (2,390) (2,905)  
Amounts recognized in the consolidated balance sheet, net (2,596) (3,068)  
Net loss 515 950  
Prior service (cost) credit 0 0  
Transition obligation (asset) 285 338  
Amounts recognized in accumulated other comprehensive loss, total $ 800 $ 1,288