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Securities (Tables)
 3 Months Ended
Mar. 31, 2013
Securities [Abstract]  
Amortized costs and fair values of securities available for sale
Amortized costs and fair values of securities available for sale at March 31, 2013 are summarized as follows:
 
   
March 31, 2013
   
Amortized
Cost
  
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
   
(In Thousands)
Available for Sale
         
U.S. government agencies
 $14,837  $442    $(35)  $15,244  
Obligations of states and
                   
political subdivisions
  79,278   3,415     (229 )   82,464  
Mortgage-backed securities:
                   
Agency
  164,305   5,630     (335 )   169,600  
Non-agency
  19,277   223     (101 )   19,399  
Other asset backed securities
  34,268   1,165     (72 )   35,361  
Corporate preferred stock
  68   —     (1 )   67  
Corporate securities
  9,730   41     (256 )   9,515  
Total
 $321,763  $10,916    $(1,029)  $331,650  




Amortized costs and fair values of securities available for sale at December 31, 2012 are summarized as follows:


 
December 31, 2012
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair
Value
 
(In Thousands)
Available for Sale
           
U.S. government agencies
$
15,391
 
$
459
   
$
(28
)
 
$
15,822
 
Obligations of states and
           
political subdivisions
74,485
 
3,920
   
(105
)
 
78,300
 
Mortgage-backed securities:
           
Agency
161,564
 
5,659
   
(280
)
 
166,943
 
Non-agency
15,310
 
287
   
(18
)
 
15,579
 
Other asset backed securities
33,648
 
1,079
   
(85
)
 
34,642
 
Corporate preferred stock
68
 
—
   
(6
)
 
62
 
Corporate securities
8,730
 
12
   
(633
)
 
8,109
 
Total
$
309,196
 
$
11,416
   
$
(1,155
)
 
$
319,457
 

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 March 31, 2013, 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.

   
March 31, 2013
   
Amortized
Cost
  
Fair
Value
   
(In thousands)
Due in one year or less
 $4,601  $4,660  
Due after one year through
         
five years
  33,133   34,410  
Due after five years through
         
ten years
  28,179   29,374  
Due after ten years
  37,932   38,779  
Mortgage-backed securities
  183,582   188,999  
Other asset backed securities
  34,268   35,361  
Corporate preferred stock
  68   67  
Total
 $321,763  $331,650  
Investments in continuous unrealized loss position
At March 31, 2013, investments in an unrealized loss position that were temporarily impaired are as follows:
 
   
March 31, 2013
      
(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
 
$
3,742
   
$
(35
)
 
$
16
   
$
—
   
$
3,758
   
$
(35
)
Obligations of states and
                  
political subdivisions
 
9,687
   
(229
)
 
—
   
—
   
9,687
   
(229
)
Mortgage backed securities:
                  
Agency
 
23,803
   
(277
)
 
1,528
   
(58
)
 
25,331
   
(335
)
Non-agency
 
9,205
   
(101
)
 
—
   
—
   
9,205
   
(101
)
Other asset backed securities
 
1,743
   
(56
)
 
1,154
   
(16
)
 
2,897
   
(72
)
Corporate preferred stock
 
—
   
—
   
38
   
(1
)
 
38
   
(1
)
Corporate securities
 
—
   
—
   
4,244
   
(256
)
 
4,244
   
(256
)
Total
 
$
48,180
   
$
(698
)
 
$
6,980
   
$
(331
)
 
$
55,160
   
$
(1,029
)

At December 31, 2012, investments in an unrealized loss position that were temporarily impaired are as follows:
 
   
December 31, 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
 
$
3,850
   
$
(28
)
 
$
16
   
$
—
   
$
3,866
   
$
(28
)
Obligations of states and
                  
political subdivisions
 
6,966
   
(105
)
 
—
   
—
   
6,966
   
(105
)
Mortgage backed securities:
                  
Agency
 
24,344
   
(234
)
 
1,241
   
(46
)
 
25,585
   
(280
)
Non-agency
 
3,295
   
(18
)
 
—
   
—
   
3,295
   
(18
)
Other asset backed securities
 
2,791
   
(57
)
 
1,418
   
(28
)
 
4,209
   
(85
)
Corporate preferred stock
 
—
   
—
   
33
   
(6
)
 
33
   
(6
)
Corporate securities
 
—
   
—
   
6,867
   
(633
)
 
6,867
   
(633
)
Trust-preferred securities
 
—
   
—
   
—
   
—
   
—
   
—
 
Total
 
$
41,246
   
$
(442
)
 
$
9,575
   
$
(713
)
 
$
50,821
   
$
(1,155
)