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Investments (Tables)
3 Months Ended
Mar. 31, 2013
Investments [Abstract]  
Amortized cost and fair value of AFS securities and corresponding amounts of gross unrealized gains and losses
The amortized cost and fair value of our available-for-sale securities ("AFS") and the corresponding amounts of gross unrealized gains and losses at the dates indicated were as follows:
 
   
Amortized
Cost
  
Gross Unrealized
  
Estimated FairValue
 
 
Gains
  
Losses 1 Year
Or Less
  
Losses Greater
Than 1 Year
 
March 31, 2013
 
(In thousands)
 
Agency mortgage-backed securities
 $17,276  $5  $(265) $-  $17,016 
Non-agency mortgage-backed securities
  3,121   53   -  $(477)  2,697 
Total
 $20,397  $58  $(265) $(477) $19,713 
                      
December 31, 2012
   
Agency mortgage-backed securities
 $20,378  $27  $(278) $-  $20,127 
Non-agency mortgage-backed securities
  3,273   19   -   (519)  2,773 
Total
 $23,651  $46  $(278) $(519) $22,900 
Amortized cost and fair value of mortgage-backed securities by contractual maturity
The amortized cost and fair value of mortgage-backed securities by contractual maturity, at March 31, 2013, are shown below. Expected maturities of mortgage-backed securities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

   
At March 31, 2013
 
   
Amortized Cost
  
Fair Value
 
   
(In thousands)
 
Due after ten years
 $20,397  $19,713 
Aggregate fair value and gross unrealized loss in continuous unrealized loss position
The following table summarizes at the dates indicated the aggregate fair value and gross unrealized loss by length of time of those investments that have been continuously in an unrealized loss position:
 
   
March 31, 2013
 
   
Less Than 12 Months
  
12 Months or Longer
  
Total
 
   
Fair
Value
  
Unrealized Loss
  
Fair
Value
  
Unrealized Loss
  
Fair
Value
  
Unrealized Loss
 
March 31, 2013
 
(In thousands)
 
Agency mortgage-backed securities
 $16,962  $(265) $-  $-  $16,962  $(265)
Non-agency mortgage-backed securities
  -   -   1,503   (477)  1,503   (477)
Total
 $16,962  $(265) $1,503  $(477) $18,465  $(742)
                          
   
December 31, 2012
 
   
Less Than 12 Months
  
12 Months or Longer
  
Total
 
   
Fair
Value
 
Unrealized Loss
  
Fair
Value
  
Unrealized Loss
  
Fair
Value
  
Unrealized Loss
 
December 31, 2012
 
(In thousands)
 
Agency mortgage-backed securities
 $17,685  $(278) $-  $-  $17,685  $(278)
Non-agency mortgage-backed securities
  -   -   2,137   (519)  2,137   (519)
Total
 $17,685  $(278) $2,137  $(519) $19,822  $(797)
Cumulative roll forward of credit losses recognized in earnings
The following table presents the cumulative roll forward of credit losses recognized in earnings during the three months ended March 31, 2013 and 2012 relating to the Company's non-U.S. agency mortgage backed securities:
 
   
Three Months Ended March 31,
 
   
2013
  
2012
 
   
(In thousands)
 
Estimated credit losses, beginning balance
 $420  $256 
Additions for credit losses not previously recognized
  19   91 
Reduction for increases in cash flows
  -   - 
Reduction for realized losses
  -   - 
Estimated credit losses, ending balance
 $439  $347