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Accumulated Other Comprehensive Income
3 Months Ended
Mar. 31, 2012
Accumulated Other Comprehensive Income [Abstract]  
Accumulated Other Comprehensive Income
10. Accumulated Other Comprehensive Income

A reconciliation of the amounts contained in accumulated other comprehensive income is as follows:

   
Accumulated other
comprehensive
income
  
Accumulated other
comprehensive
income, net of tax
 
As of December 31, 2011
 $175  $155 
Decreases to fair market value during period
  60   51 
Decreases due to realization of a gain
  (144)  (122)
As of March 31, 2012
 $91  $84