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Securities (Tables)
 9 Months Ended
Sep. 30, 2012
Securities [Abstract]  
Amortized costs and fair values of securities available for sale
Amortized costs and fair values of securities available for sale at September 30, 2012 are summarized as follows:


   
September 30, 2012
 
   
Amortized
Cost
  
Gross
Unrealized
Gains
  
Gross
Unrealized
Losses
  
Fair
Value
 
   
(In Thousands)
 
Available for Sale
            
U.S. government agencies
 $13,246  $411  $(3) $13,654 
Obligations of states and
                
political subdivisions
  70,460   3,852   (8)  74,304 
Mortgage-backed securities:
                
Agency
  159,790   5,994   (272)  165,512 
Non-agency
  15,015   298   (8)  15,305 
Other asset backed securities
  31,575   703   (86)  32,192 
Corporate preferred stock
  68   —   (7)  61 
Corporate securities
  8,230   11   (895)  7,346 
Total
 $298,384  $11,269  $(1,279) $308,374 

Amortized costs and fair values of securities available for sale at December 31, 2011 are summarized as follows:
 
   
December 31, 2011
 
   
Amortized
Cost
  
Gross
Unrealized
Gains
  
Gross
Unrealized
Losses
  
Fair
Value
 
   
(In Thousands)
 
Available for Sale
            
U.S. government agencies
 $9,068  $293  $(18) $9,343 
Obligations of states and
                
political subdivisions
  65,090   2,503   (51)  67,542 
Mortgage-backed securities:
                
Agency
  181,797   5,482   (209)  187,070 
Non-agency
  18,737   67   (598)  18,206 
Other asset backed securities
  16,110   90   (404)  15,796 
Corporate preferred stock
  68   —   (28)  40 
Corporate securities
  10,612   5   (641)  9,976 
Trust-preferred securities
  497   —   (228)  269 
Total
 $301,979  $8,440  $(2,177) $308,242 
Amortized cost and fair value of securities available for sale by contractual maturity
The amortized cost and fair value of securities available for sale as of September 30, 2012, by contractual maturity are shown below. Maturities may differ from contractual maturities in mortgage-backed, other asset-backed, and corporate securities because the mortgages, loans, and securities underlying the securities may be called or repaid without any penalties. Therefore, these securities are not included in the maturity categories in the following maturity summary.


   
September 30, 2012
 
   
Amortized
Cost
  
Fair
Value
 
   
(In thousands)
 
Due in one year or less
 $4,863  $4,892 
Due after one year through
        
five years
  22,698   22,772 
Due after five years through
        
ten years
  31,943   33,717 
Due after ten years
  32,432   33,923 
Mortgage-backed securities
  174,805   180,817 
Other asset backed securities
  31,575   32,192 
Corporate preferred stock
  68   61 
Total
 $298,384  $308,374 
Investments in unrealized loss position
At September 30, 2012, investments in an unrealized loss position that were temporarily impaired are as follows:
 
   
September 30, 2012
      
(In thousands)
   
   
Less than Twelve Months
 
Twelve Months or Greater
 
Total
   
Fair Value
 
Gross
Unrealized Losses
 
Fair Value
 
Gross
Unrealized Losses
 
Fair Value
 
Gross
Unrealized Losses
U.S. government agencies
 
$
2,568
   
$
(3
)
 
$
57
   
$
—
   
$
2,625
   
$
(3
)
Obligations of states and
                  
political subdivisions
 
1,302
   
(8
)
 
—
   
—
   
1,302
   
(8
)
Mortgage backed securities:
                  
Agency
 
16,213
   
(272
)
 
—
   
—
   
16,213
   
(272
)
Non-agency
 
2,760
   
(8
)
 
—
   
—
   
2,760
   
(8
)
Other asset backed securities
 
4,231
   
(56
)
 
1,431
   
(30
)
 
5,662
   
(86
)
Corporate preferred stock
 
—
   
—
   
32
   
(7
)
 
32
   
(7
)
Corporate securities
 
—
   
—
   
7,105
   
(895
)
 
7,105
   
(895
)
Total
 
$
27,074
   
$
(347
)
 
$
8,625
   
$
(932
)
 
$
35,699
   
$
(1,279
)

At December 31, 2011, investments in an unrealized loss position that were temporarily impaired are as follows:


   
December 31, 2011
      
(In thousands)
   
   
Less than Twelve Months
 
Twelve Months or Greater
 
Total
   
Fair Value
 
Gross
Unrealized Losses
 
Fair Value
 
Gross
Unrealized Losses
 
Fair Value
 
Gross
Unrealized Losses
U.S. government agencies
 
$
2,045
   
$
(18
)
 
$
26
   
$
—
   
$
2,071
   
$
(18
)
Obligations of states and
                  
political subdivisions
 
43
   
—
   
2,243
   
(51
)
 
2,286
   
(51
)
Mortgage backed securities:
                  
Agency
 
22,768
   
(209
)
 
—
   
—
   
22,768
   
(209
)
Non-agency
 
4,773
   
(103
)
 
4,522
   
(495
)
 
9,295
   
(598
)
Other asset backed securities
 
10,572
   
(362
)
 
1,467
   
(42
)
 
12,039
   
(404
)
Corporate preferred stock
 
—
   
—
   
11
   
(28
)
 
11
   
(28
)
Corporate securities
 
7,775
   
(227
)
 
2,057
   
(414
)
 
9,832
   
(641
)
Trust-preferred securities
 
—
   
—
   
269
   
(228
)
 
269
   
(228
)
Total
 
$
47,976
   
$
(919
)
 
$
10,595
   
$
(1,258
)
 
$
58,571
   
$
(2,177
)