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Investment Securities
9 Months Ended
Sep. 30, 2011
Investment Securities [Abstract] 
Investment Securities
(4)  Investment Securities

The following table presents the amortized cost, unrealized gains, unrealized losses and fair value of investment securities available for sale at September 30, 2011 and December 31, 2010.  At September 30, 2011 and December 31, 2010, there were no investment securities as held to maturity or trading.

(dollars in thousands)
 
September 30, 2011
 
   
Amortized cost
  
Unrealized gains
  
Unrealized losses
  
Fair value
 
U.S. government agencies
 $66,006  $1,210  $(64) $67,152 
U.S. Treasuries
  52,101   602   -   52,703 
Pass-through securities
  96,385   1,124   (100)  97,409 
Taxable state and political subdivisions
  9,149   511   -   9,660 
Tax exempt state and political subdivisions
  34,198   1,832   (87)  35,943 
Corporate obligations
  12,000   5   (143)  11,862 
Investments in mutual funds and other equities
  4,043   -   (411)  3,632 
Total investment securities available for sale
 $273,882  $5,284  $(805) $278,361 
                  

(dollars in thousands)
 
December 31, 2010
 
   
Amortized cost
  
Unrealized gains
  
Unrealized losses
  
Fair value
 
U.S. government agencies
 $103,109  $695  $(814) $102,990 
U.S. Treasuries
  54,175   530   (62)  54,643 
Pass-through securities
  1,216   24   (1)  1,239 
Taxable state and political subdivisions
  6,090   33   (356)  5,767 
Tax exempt state and political subdivisions
  22,312   603   (304)  22,611 
Corporate obligations
  9,001   24   (51)  8,974 
Investments in mutual funds and other equities
  4,044   -   (712)  3,332 
Total investment securities available for sale
 $199,947  $1,909  $(2,300) $199,556 
                  
(a) Other-Than-Temporarily Impaired Debt Securities: At September 30, 2011 and December 31, 2010, there were 9 and 52 investment securities in unrealized loss positions, respectively.  For each security in an unrealized loss position, the Company assesses whether it intends to sell the security, or it is more likely than not that it will be required to sell the security before recovery of its amortized cost basis. For debt securities that are considered other-than-temporarily impaired and that the Company does not intend to sell and will not be required to sell prior to recovery of its amortized cost basis, the Company will separate the amount of the impairment into the amount that is credit related (credit loss component) and the amount due to all other factors. The credit loss component is recognized in earnings and is calculated as the difference between the security's amortized cost basis and the present value of its expected future cash flows. The remaining difference between the security's fair value and the present value of future expected cash flows is deemed to be due to factors that are not credit related and is recognized in other comprehensive income.

The Company does not intend to sell the securities that are temporarily impaired, and it is more likely than not that the Company will not have to sell those securities before recovery of the cost basis. Additionally, the Company has evaluated the credit ratings of its investment securities and their issuers and/or insurers, as applicable. Based on the Company's evaluation, management has determined that no investment security in the Company's investment portfolio was other-than-temporarily impaired at September 30, 2011 or December 31, 2010.

The following table shows gross unrealized losses and fair value of securities with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by category and length of time that individual securities have been in a continuous unrealized loss position at September 30, 2011 and December 31, 2010:

(dollars in thousands)
 
September 30, 2011
 
   
Less than 12 Months
  
12 Months or Longer
  
Total
 
   
Fair value
  
Unrealized losses
  
Fair value
  
Unrealized losses
  
Fair value
  
Unrealized losses
 
U.S. government agencies
 $10,479  $(64) $-  $-  $10,479  $(64)
Pass-through securities
  20,662   (100)          20,662   (100)
Tax exempt state and political subdivisions
  3,164   (87)  -   -   3,164   (87)
Corporate obligations
  10,858   (142)  -   -   10,858   (142)
Investments in mutual funds and other equities
  4,043   (411)  -   -   4,043   (411)
Total investment securities available for sale
 $49,206  $(804) $-  $-  $49,206  $(804)
                          

(dollars in thousands)
 
December 31, 2010
 
   
Less than 12 Months
  
12 Months or Longer
  
Total
 
   
Fair value
  
Unrealized losses
  
Fair value
  
Unrealized losses
  
Fair value
  
Unrealized losses
 
U.S. government agencies
 $52,196  $(814) $-  $-  $52,196  $(814)
U.S. Treasuries
  4,988   (62)  -   -   4,988   (62)
Pass-through securities
  200   (1)  -   -   200   (1)
Taxable state and political subdivisions
  4,221   (356)  -   -   4,221   (356)
Tax exempt state and political subdivisions
  6,004   (304)  -   -   6,004   (304)
Corporate obligations
  7,949   (51)  -   -   7,949   (51)
Investments in mutual funds and other equities
  4,044   (712)  -   -   4,044   (712)
Total investment securities available for sale
 $79,602  $(2,300) $-  $-  $79,602  $(2,300)
                          
The unrealized losses associated with U.S. government agency and treasury debt securities are primarily driven by changes in interest rates and not due to the credit quality of the securities. Further, the pass-through securities backed by GNMA, FNMA or FHLMC have the guarantee of the full faith and credit of the U.S. Federal Government. Obligations of U.S. states and political subdivisions in our portfolio are all investment grade without delinquency history.

The amortized cost and fair value of collateralized mortgage backed securities are presented by expected average life, rather than contractual maturity at September 30, 2011, are shown in the table below.  Expected maturities may differ from contractual maturities because issuers of the securities may have the right to call or prepay obligations with or without call or prepayment penalties.

(dollars in thousands)
 
September 30, 2011
 
   
Amortized
  
Fair
 
   
Cost
  
Value
 
Three months or less
 $13,369  $13,388 
Over three months to one year
  45,887   45,968 
After one year through three years
  31,164   31,850 
After three years through five years
  63,066   64,066 
After five years through ten years
  92,174   93,950 
After ten years
  28,222   29,139 
Total
 $273,882  $278,361 
          

The following table presents investment securities which were pledged to secure borrowings and public deposits as permitted or required by law:

(dollars in thousands)
 
September 30, 2011
 
   
Amortized cost
  
Fair value
 
To state and local governments to secure public deposits
 $60,169  $62,380 
To Federal Reserve Bank to secure borrowings
  27,790   28,438 
To Federal Home Loan Bank to secure borrowings
  1,693   1,725 
Other securities pledged, principally to secure deposits
  13,234   13,834 
Total pledged investment securities
 $102,886  $106,377