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Pension and Other Postretirement Benefits (Tables)
3 Months Ended
Mar. 31, 2012
Pension and Other Postretirement Benefits Tables [Abstract]  
Pension and Other Postretirement Benefits [Table Text Block]
   Pension Benefits  Postretirement Benefits 
 Three Months Ended March 31,20122011 20122011
 Components of net periodic cost:             
  Service cost$9 $9  $ $ 
  Interest cost 61  62   8  9 
  Expected return on plan assets (62)  (59)      
  Amortization of actuarial loss (gain) 18  16   (4)  (2) 
 Net periodic cost$26 $28  $4 $7