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Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Available-for-sale securities$ 124$ 157
Derivative financial instrument42399
Level 1 [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Available-for-sale securities124157
Derivative financial instrument  
Level 2 [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Available-for-sale securities  
Derivative financial instrument42399
Level 3 [Member]
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Available-for-sale securities  
Derivative financial instrument