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Allowance for Loan Losses (Tables)
 9 Months Ended
Sep. 30, 2012
Allowance for Loan Losses [Abstract]  
Allowance for loan losses
The following tables present a rollforward of the changes in the allowance for loan losses balance by class of loan, the balances in the allowance for loan losses and the recorded investment in loans by class of loan and, for the ending loan balances, based on impairment evaluation method as of September 30, 2012 and December 31, 2011.

 
September 30, 2012
  (In Thousands)
 
Real Estate
Construction
 
Real Estate
Secured by
Farmland
 
Real Estate
Secured by 1-4
Family Residential
 
Other Real
Estate Loans
 
Commercial
 
Consumer
 
Total
Allowance for loan losses:
                         
Balances as of December 31, 2011
$
897
   
$
110
   
$
7,465
   
$
4,385
   
$
1,621
   
$
145
   
$
14,623
 
Chargeoffs
(1,521
)
 
—
   
(740
)
 
(715
)
 
(189
)
 
(46
)
 
(3,211
)
Recoveries
1
   
—
   
268
   
65
   
9
   
30
   
373
 
Provision
1,668
   
(3
)
 
(1,158
)
 
1,029
   
553
   
67
   
2,156
 
Balances as of September 30, 2012
$
1,045
   
$
107
   
$
5,835
   
$
4,764
   
$
1,994
   
$
196
   
$
13,941
 
Ending allowance balance:
                         
Ending allowance balance attributable to loans:
                         
Individually evaluated for impairment
$
198
   
$
—
   
$
2,577
   
$
1,408
   
$
361
   
$
30
   
$
4,574
 
Collectively evaluated for impairment
847
   
107
   
3,258
   
3,356
   
1,633
   
166
   
9,367
 
Total ending allowance balances
$
1,045
   
$
107
   
$
5,835
   
$
4,764
   
$
1,994
   
$
196
   
$
13,941
 
Ending loan recorded investment balances:
                         
Individually evaluated for impairment
$
2,943
   
$
—
   
$
9,937
   
$
11,667
   
$
2,409
   
$
30
   
$
26,986
 
Collectively evaluated for impairment
45,797
   
9,438
   
244,142
   
247,012
   
106,553
   
12,436
   
665,378
 
Total ending loan balances
$
48,740
   
$
9,438
   
$
254,079
   
$
258,679
   
$
108,962
   
$
12,466
   
$
692,364
 

 
December 31, 2011
  (In Thousands)
 
Real Estate
Construction
 
Real Estate
Secured by
Farmland
 
Real Estate
Secured by 1-4
Family Residential
 
Other Real
Estate Loans
 
Commercial
 
Consumer
 
Total
Allowance for loan losses:
                         
Balances at December 31, 2010
$
4,684
   
$
107
   
$
3,965
   
$
4,771
   
$
1,055
   
$
385
   
$
14,967
 
Chargeoffs
(467
)
 
—
   
(2,062
)
 
(438
)
 
(180
)
 
(318
)
 
(3,465
)
Recoveries
29
   
—
   
41
   
98
   
41
   
28
   
237
 
Provision
(3,349
)
 
3
   
5,521
   
(46
)
 
705
   
50
   
2,884
 
Balances at December 31, 2011
$
897
   
$
110
   
$
7,465
   
$
4,385
   
$
1,621
   
$
145
   
$
14,623
 
Ending allowance balance:
                         
Ending allowance balance attributable to loans:
                         
Individually evaluated for impairment
$
328
   
$
—
   
$
3,076
   
$
1,192
   
$
502
   
$
—
   
$
5,098
 
Collectively evaluated for impairment
569
   
110
   
4,389
   
3,193
   
1,119
   
145
   
9,525
 
Total ending allowance balances
$
897
   
$
110
   
$
7,465
   
$
4,385
   
$
1,621
   
$
145
   
$
14,623
 
Ending loan recorded investment balances:
                         
Individually evaluated for impairment
$
3,804
   
$
—
   
$
12,675
   
$
10,313
   
$
2,407
   
$
—
   
$
29,199
 
Collectively evaluated for impairment
38,404
   
10,047
   
224,085
   
265,115
   
92,020
   
12,523
   
642,194
 
Total ending loan balances
$
42,208
   
$
10,047
   
$
236,760
   
$
275,428
   
$
94,427
   
$
12,523
   
$
671,393