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Pension Plan (Tables)
3 Months Ended
Mar. 31, 2012
Pension Plan [Abstract]  
Schedule Of Components Of Net Periodic Cost (Benefit)
    

Three months ended

March 31,

 
     2012     2011  

Service cost

   $ 286      $ 334   

Interest cost

     1,165        1,452   

Expected return on assets

     (1,540     (1,509

Recognized actuarial loss

     1,055        744   
  

 

 

   

 

 

 

Net periodic pension cost

   $ 966      $ 1,021