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Held To Maturity Securities (Tables)
9 Months Ended
Sep. 30, 2011
Held to Maturity Securities [Abstract] 
Contractual maturities of held-to-maturity securities

Listed below are the contractual maturities (under 1 year, 1-5 years, 6-10 years, and over 10 years) of held-to-maturity securities at September 30, 2011. There were no securities classified as held-to-maturity at December 31, 2010 or September 30, 2010.

    September 30, 2011 
    Amortized   Fair  
(dollar amounts in thousands) Cost   Value  
 Federal agencies: mortgage-backed securities:      
  Under 1 year$ --- $ --- 
  1-5 years  ---   --- 
  6-10 years  ---   --- 
  Over 10 years  658,250   682,897 
 Total Federal agencies: mortgage-backed securities 658,250   682,897 
Total U.S. Government backed agencies  658,250   682,897 
Total held-to-maturity securities$658,250 $682,897 
         
Amortized cost, gross unrealized gains and losses, and fair value by investment category

The following table provides amortized cost, gross unrealized gains and losses, and fair value by investment category at September 30, 2011:

 

      Unrealized   
   Amortized  Gross  Gross  Fair
(dollar amounts in thousands) Cost  Gains  Losses  Value
September 30, 2011           
Federal Agencies:           
 Mortgage-backed securities$ 658,250 $ 24,647 $ --- $ 682,897
Total U.S. Government           
 backed securities  658,250   24,647   ---   682,897
Total held-to-maturity securities$ 658,250 $ 24,647 $ --- $ 682,897