Loans and ALLL (Summary of changes in ALLL by segments) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Summary of changes in the ALLL and the recorded investment in loans by segments    
Allowance for loan losses, Beginning Balance $ 11,936 $ 12,375
Allowance for loan losses, Loans charged off (2,340) (3,356)
Allowance for loan losses, Recoveries 793 617
Allowance for loan losses, Provision for loan losses 1,111 2,300
Allowance for loan losses, Ending Balance 11,500 11,936
Commercial [Member]
   
Summary of changes in the ALLL and the recorded investment in loans by segments    
Allowance for loan losses, Beginning Balance 6,862 6,284
Allowance for loan losses, Loans charged off (895) (1,672)
Allowance for loan losses, Recoveries 363 240
Allowance for loan losses, Provision for loan losses (282) 2,010
Allowance for loan losses, Ending Balance 6,048 6,862
Agricultural [Member]
   
Summary of changes in the ALLL and the recorded investment in loans by segments    
Allowance for loan losses, Beginning Balance 407 1,003
Allowance for loan losses, Loans charged off (12) 0
Allowance for loan losses, Recoveries 0 0
Allowance for loan losses, Provision for loan losses 39 (596)
Allowance for loan losses, Ending Balance 434 407
Residential Real Estate [Member]
   
Summary of changes in the ALLL and the recorded investment in loans by segments    
Allowance for loan losses, Beginning Balance 3,627 2,980
Allowance for loan losses, Loans charged off (1,004) (1,142)
Allowance for loan losses, Recoveries 181 122
Allowance for loan losses, Provision for loan losses 1,041 1,667
Allowance for loan losses, Ending Balance 3,845 3,627
Consumer [Member]
   
Summary of changes in the ALLL and the recorded investment in loans by segments    
Allowance for loan losses, Beginning Balance 666 633
Allowance for loan losses, Loans charged off (429) (542)
Allowance for loan losses, Recoveries 249 255
Allowance for loan losses, Provision for loan losses 153 320
Allowance for loan losses, Ending Balance 639 666
Unallocated [Member]
   
Summary of changes in the ALLL and the recorded investment in loans by segments    
Allowance for loan losses, Beginning Balance 374 1,475
Allowance for loan losses, Loans charged off 0 0
Allowance for loan losses, Recoveries 0 0
Allowance for loan losses, Provision for loan losses 160 (1,101)
Allowance for loan losses, Ending Balance $ 534 $ 374