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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2012
Summary of Significant Accounting Policies [Abstract]  
Components of other comprehensive income and related tax effects
                         
    (In Thousands)  
    2012     2011     2010  

Net unrealized gain (loss) on available-for-sale securities

  $ 417     $ 9,357     $ (2,037

Reclassification adjustment for gain on sale of available-for-sale securities

    (852     (504     (956
   

 

 

   

 

 

   

 

 

 

Net unrealized gains (losses)

    (435     8,853       (2,993

Tax effect

    (147     3,010       (1,017
   

 

 

   

 

 

   

 

 

 

Other comprehensive income (loss)

  $ (288   $ 5,843     $ (1,976