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Pension Plans And Other Postretirement Benefits (One-Percentage Point Change In Assumed Health Care Cost Trend Rate) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
U.S. Postretirement Plan [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Effect on accumulated postretirement benefit obligation as of December 31, 2011, 1% increase $ 8,965
Effect on net periodic postretirement benefit cost in 2011, 1% increase 820
Effect on accumulated postretirement benefit obligation as of December 31, 2011, 1% decrease (7,015)
Effect on net periodic postretirement benefit cost in 2011, 1% decrease (626)
Foreign Postretirement Plan [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Effect on accumulated postretirement benefit obligation as of December 31, 2011, 1% increase 292
Effect on net periodic postretirement benefit cost in 2011, 1% increase 1
Effect on accumulated postretirement benefit obligation as of December 31, 2011, 1% decrease (361)
Effect on net periodic postretirement benefit cost in 2011, 1% decrease $ (3)