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Accumulated Other Comprehensive Income (Loss) (Tables)
3 Months Ended
Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Abstract]  
Schedule of changes in component of accumulated other comprehensive income (loss)
                         
    Net
Unrealized
Gains (Losses)
on Securities
    Adjustments
Related to
Pension
Benefits
    Accumulated
Other
Comprehensive
Income (Loss)
 
       

Balance at December 31, 2011

  $ 3,166     $ (2,175   $ 991  

Net unrealized losses on investment securities

    (121     —         (121

Reclassification adjustment

    (1,117     —         (1,117
   

 

 

   

 

 

   

 

 

 

Balance at March 31, 2012

  $ 1,928     $ (2,175   $ (247
   

 

 

   

 

 

   

 

 

 
       

Balance at December 31, 2012

  $ 1,770     $ (2,629   $ (859

Net unrealized losses on investment securities

    (132     —         (132
   

 

 

   

 

 

   

 

 

 

Balance at March 31, 2013

  $ 1,638     $ (2,629   $ (991