Loans (Schedule Of Activity In The Allowance For Loan Losses) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance $ 18,234 $ 24,358 $ 21,232 $ 31,511  
Charge-offs (3,183) (4,354) (9,376) (19,416)  
Recoveries 269 910 739 1,319  
Provision 5,750 2,400 8,475 9,900  
Ending Balance 21,070 23,314 21,070 23,314  
Allowance for loan losses: Loans individually evaluated for impairment 13,476   13,476   9,750
Allowance for loan losses: Loans collectively evaluated for impairment 7,594   7,594   11,482
Allowance for loan losses: Total ending allowance balance: 21,070   21,070   21,232
Loan balances: Loans individually evaluated for impairment 59,499   59,499   73,299
Loan balances: Loans collectively evaluated for impairment 501,977   501,977   509,096
Total Loans 561,476   561,476   582,395
Commercial [Member]
          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance 1,478 1,751 1,590 1,634  
Charge-offs    (151)   (391)  
Recoveries 1 17 1 35  
Provision 503 509 391 848  
Ending Balance 1,982 2,126 1,982 2,126  
Allowance for loan losses: Loans individually evaluated for impairment 1,510   1,510   715
Allowance for loan losses: Loans collectively evaluated for impairment 472   472   875
Allowance for loan losses: Total ending allowance balance: 1,982   1,982   1,590
Loan balances: Loans individually evaluated for impairment 4,712   4,712   2,463
Loan balances: Loans collectively evaluated for impairment 53,732   53,732   61,519
Total Loans 58,444   58,444   63,982
Agriculture & AGRE [Member]
          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance 267 386 5 337  
Charge-offs (128) (21) (215) (674)  
Recoveries 19 3 62 6  
Provision (48) (362) 258 337  
Ending Balance 110 6 110 6  
Allowance for loan losses: Loans individually evaluated for impairment 41   41    
Allowance for loan losses: Loans collectively evaluated for impairment 69   69   5
Allowance for loan losses: Total ending allowance balance: 110   110   5
Loan balances: Loans individually evaluated for impairment 126   126   65
Loan balances: Loans collectively evaluated for impairment 42,245   42,245   39,063
Total Loans 42,371   42,371   39,128
Construction, Land & Development [Member]
          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance 3,793 6,310 4,811 12,500  
Charge-offs (2,150) (3,018) (3,243) (9,852)  
Recoveries 2 451 288 551  
Provision 2,234 1,372 2,023 1,916  
Ending Balance 3,879 5,115 3,879 5,115  
Allowance for loan losses: Loans individually evaluated for impairment 2,744   2,744   2,228
Allowance for loan losses: Loans collectively evaluated for impairment 1,135   1,135   2,583
Allowance for loan losses: Total ending allowance balance: 3,879   3,879   4,811
Loan balances: Loans individually evaluated for impairment 15,401   15,401   24,062
Loan balances: Loans collectively evaluated for impairment 17,030   17,030   17,946
Total Loans 32,431   32,431   42,008
Commercial Real Estate [Member]
          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance 9,765 13,009 11,680 13,721  
Charge-offs (191) (961) (4,120) (6,975)  
Recoveries 239 12 370 243  
Provision 1,264 702 3,147 5,773  
Ending Balance 11,077 12,762 11,077 12,762  
Allowance for loan losses: Loans individually evaluated for impairment 6,852   6,852   5,211
Allowance for loan losses: Loans collectively evaluated for impairment 4,225   4,225   6,469
Allowance for loan losses: Total ending allowance balance: 11,077   11,077   11,680
Loan balances: Loans individually evaluated for impairment 29,746   29,746   36,141
Loan balances: Loans collectively evaluated for impairment 266,749   266,749   251,927
Total Loans 296,495   296,495   288,068
1-4 Family Residential [Member]
          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance 2,883 2,867 3,090 3,273  
Charge-offs (714) (194) (1,792) (1,489)  
Recoveries 7 426 14 462  
Provision 1,792 170 2,656 1,023  
Ending Balance 3,968 3,269 3,968 3,269  
Allowance for loan losses: Loans individually evaluated for impairment 2,327   2,327   1,591
Allowance for loan losses: Loans collectively evaluated for impairment 1,641   1,641   1,499
Allowance for loan losses: Total ending allowance balance: 3,968   3,968   3,090
Loan balances: Loans individually evaluated for impairment 9,510   9,510   10,563
Loan balances: Loans collectively evaluated for impairment 119,735   119,735   136,204
Total Loans 129,245   129,245   146,767
Consumer [Member]
          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Beginning Balance 48 35 56 46  
Charge-offs    (9) (6) (35)  
Recoveries 1 1 4 22  
Provision 5 9   3  
Ending Balance 54 36 54 36  
Allowance for loan losses: Loans individually evaluated for impairment 2   2   5
Allowance for loan losses: Loans collectively evaluated for impairment 52   52   51
Allowance for loan losses: Total ending allowance balance: 54   54   56
Loan balances: Loans individually evaluated for impairment 4   4   5
Loan balances: Loans collectively evaluated for impairment 2,486   2,486   2,437
Total Loans $ 2,490   $ 2,490   $ 2,442