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Securities Available for Sale (Tables)
9 Months Ended
Sep. 30, 2012
Amortized Cost and Corresponding Fair Value of Investment Securities Available for Sale
The Company classifies all of its investment securities as available for sale. The following summary sets forth the amortized cost and the corresponding fair value of investment securities available for sale at September 30, 2012 and December 31, 2011:
 
(in thousands)
 
Amortized
Cost
   
Gross
Unrealized
Gains
   
Gross
Unrealized
Losses
   
Estimated
Fair Value
 
                         
September 30, 2012
                       
U.S. Treasury securities
  $ 504     $ 5     $ 0     $ 509  
Obligations of U.S. Government sponsored enterprises
    172,834       1,180       161       173,853  
Obligations of states and political subdivisions
    880       2       0       882  
Mortgage-backed securities
    320,081       3,472       1,191       322,362  
Total
  $ 494,299     $ 4,659     $ 1,352     $ 497,606  
                                 
   
Amortized
Cost
   
Gross
Unrealized
Gains
   
Gross
Unrealized
Losses
   
Estimated
Fair Value
 
                         
December 31, 2011
                       
U.S. Treasury securities
  $ 507     $ 6     $ 0     $ 513  
Obligations of U.S. Government sponsored enterprises
    181,624       181       185       181,620  
Obligations of states and political subdivisions
    1,325       4       0       1,329  
Mortgage-backed securities
    329,853       4,902       1,004       333,751  
Total
  $ 513,309     $ 5,093     $ 1,189     $ 517,213  
Maturities of Securities Available for Sale
Maturities of securities available for sale as of September 30, 2012, were as follows:
 
(in thousands)
 
Amortized
Cost
   
Fair
Value
 
       
Due in 1 year or less
  $ 26,117     $ 26,249  
Due in 1 to 5 years
    20,664       20,727  
Due in 5 to 10 years
    42,812       43,184  
Due in over 10 years
    84,625       85,084  
Mortgage-backed securities
    320,081       322,362  
Total
  $ 494,299     $ 497,606  
Gross Unrealized Losses on and Fair Value of Investment Securities With Unrealized Losses Position Aggregated by Investment Category and Length of Time that Individual Securities Have Been in Continuous Unrealized Loss Position
The following table shows the Company's combined gross unrealized losses on, and fair value of, investment securities with unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2012 and December 31, 2011.
 
(in thousands)
  September 30, 2012  
     Less than 12 Months      12 Months or More      Total  
   
Fair
Value
   
Unrealized
Losses
   
Fair
Value
   
Unrealized
Losses
   
Fair
Value
   
Unrealized
Losses
 
                                     
Obligations of U.S. Government
   sponsored enterprises
  $ 18,052     $ 161     $ 0     $ 0     $ 18,052     $ 161  
Mortgage-backed securities
    84,908       637       7,277       554       92,185       1,191  
Total
  $ 102,960     $ 798     $ 7,277     $ 554     $ 110,237     $ 1,352  
       
       
   
December 31, 2011
 
   
Less than 12 Months
   
12 Months or More
   
Total
 
   
Fair
Value
   
Unrealized
Losses
   
Fair
Value
   
Unrealized
Losses
   
Fair
Value
   
Unrealized
Losses
 
       
Obligations of U.S. Government
   sponsored enterprises
  $ 69,852     $ 166     $ 6,207     $ 19     $ 76,059     $ 185  
Mortgage-backed securities
    57,615       268       2,789       736       60,404       1,004  
Total
  $ 127,467     $ 434     $ 8,996     $ 755     $ 136,463     $ 1,189  
Changes in Amount of Credit Losses on Investment Securities Recognized in Earnings
The following table summarizes the changes in the amount of credit losses on the Company's investment securities recognized in earnings for the three and nine months ended September 30, 2012 and 2011:


   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
(in thousands)
 
2012
   
2011
   
2012
   
2011
 
                         
                         
Beginning balance of credit losses previously recognized in earnings
  $ 600     $ 400     $ 600     $ 400  
Amount related to credit loss for securities as to which an
other-than-temporary impairment was not previously recognized in earnings
    0       0       0       0  
Amount related to credit loss for securities as to which an
other-than-temporary impairment was recognized in earnings
    0       50       0       50  
Ending balance of cumulative credit losses recognized in earnings
  $ 600     $ 450     $ 600     $ 450