Allowance for Credit Losses - Loan Portfolio by Risk Rating (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment
Loans	$ 512,516	$ 395,771
Pass
Financing Receivable, Recorded Investment
Loans	466,472	354,169
Special Mention
Financing Receivable, Recorded Investment
Loans	19,609	11,836
Substandard
Financing Receivable, Recorded Investment
Loans	26,435	29,766
Doubtful
Financing Receivable, Recorded Investment
Loans	0	0
Commercial
Financing Receivable, Recorded Investment
Loans	118,731	104,555
Commercial \| Commercial and industrial
Financing Receivable, Recorded Investment
Loans	87,082	77,956
Commercial \| Agricultural land and production
Financing Receivable, Recorded Investment
Loans	31,649	26,599
Commercial \| Pass \| Commercial and industrial
Financing Receivable, Recorded Investment
Loans	81,732	71,125
Commercial \| Pass \| Agricultural land and production
Financing Receivable, Recorded Investment
Loans	31,649	26,599
Commercial \| Special Mention \| Commercial and industrial
Financing Receivable, Recorded Investment
Loans	2,244	824
Commercial \| Special Mention \| Agricultural land and production
Financing Receivable, Recorded Investment
Loans	0	0
Commercial \| Substandard \| Commercial and industrial
Financing Receivable, Recorded Investment
Loans	3,106	6,007
Commercial \| Substandard \| Agricultural land and production
Financing Receivable, Recorded Investment
Loans	0	0
Commercial \| Doubtful \| Commercial and industrial
Financing Receivable, Recorded Investment
Loans	0	0
Commercial \| Doubtful \| Agricultural land and production
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment
Financing Receivable, Recorded Investment
Loans	333,939	237,938
Real Estate Portfolio Segment \| Owner occupied
Financing Receivable, Recorded Investment
Loans	156,781	114,444
Real Estate Portfolio Segment \| Real estate construction and other land loans
Financing Receivable, Recorded Investment
Loans	42,329	33,199
Real Estate Portfolio Segment \| Commercial real estate
Financing Receivable, Recorded Investment
Loans	86,117	53,797
Real Estate Portfolio Segment \| Agricultural real estate
Financing Receivable, Recorded Investment
Loans	44,164	28,400
Real Estate Portfolio Segment \| Other real estate
Financing Receivable, Recorded Investment
Loans	4,548	8,098
Real Estate Portfolio Segment \| Pass \| Owner occupied
Financing Receivable, Recorded Investment
Loans	144,082	107,281
Real Estate Portfolio Segment \| Pass \| Real estate construction and other land loans
Financing Receivable, Recorded Investment
Loans	31,776	18,517
Real Estate Portfolio Segment \| Pass \| Commercial real estate
Financing Receivable, Recorded Investment
Loans	77,589	44,880
Real Estate Portfolio Segment \| Pass \| Agricultural real estate
Financing Receivable, Recorded Investment
Loans	42,151	26,883
Real Estate Portfolio Segment \| Pass \| Other real estate
Financing Receivable, Recorded Investment
Loans	4,548	8,098
Real Estate Portfolio Segment \| Special Mention \| Owner occupied
Financing Receivable, Recorded Investment
Loans	5,229	1,831
Real Estate Portfolio Segment \| Special Mention \| Real estate construction and other land loans
Financing Receivable, Recorded Investment
Loans	3,959	3,377
Real Estate Portfolio Segment \| Special Mention \| Commercial real estate
Financing Receivable, Recorded Investment
Loans	3,718	3,952
Real Estate Portfolio Segment \| Special Mention \| Agricultural real estate
Financing Receivable, Recorded Investment
Loans	2,013	1,517
Real Estate Portfolio Segment \| Special Mention \| Other real estate
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment \| Substandard \| Owner occupied
Financing Receivable, Recorded Investment
Loans	7,470	5,332
Real Estate Portfolio Segment \| Substandard \| Real estate construction and other land loans
Financing Receivable, Recorded Investment
Loans	6,594	11,305
Real Estate Portfolio Segment \| Substandard \| Commercial real estate
Financing Receivable, Recorded Investment
Loans	4,810	4,965
Real Estate Portfolio Segment \| Substandard \| Agricultural real estate
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment \| Substandard \| Other real estate
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment \| Doubtful \| Owner occupied
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment \| Doubtful \| Real estate construction and other land loans
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment \| Doubtful \| Commercial real estate
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment \| Doubtful \| Agricultural real estate
Financing Receivable, Recorded Investment
Loans	0	0
Real Estate Portfolio Segment \| Doubtful \| Other real estate
Financing Receivable, Recorded Investment
Loans	0	0
Consumer
Financing Receivable, Recorded Investment
Loans	59,846	53,278
Consumer \| Equity loans and lines of credit
Financing Receivable, Recorded Investment
Loans	48,594	42,932
Consumer \| Consumer and installment
Financing Receivable, Recorded Investment
Loans	11,252	10,346
Consumer \| Pass \| Equity loans and lines of credit
Financing Receivable, Recorded Investment
Loans	41,999	40,527
Consumer \| Pass \| Consumer and installment
Financing Receivable, Recorded Investment
Loans	10,946	10,259
Consumer \| Special Mention \| Equity loans and lines of credit
Financing Receivable, Recorded Investment
Loans	2,400	258
Consumer \| Special Mention \| Consumer and installment
Financing Receivable, Recorded Investment
Loans	46	77
Consumer \| Substandard \| Equity loans and lines of credit
Financing Receivable, Recorded Investment
Loans	4,195	2,147
Consumer \| Substandard \| Consumer and installment
Financing Receivable, Recorded Investment
Loans	260	10
Consumer \| Doubtful \| Equity loans and lines of credit
Financing Receivable, Recorded Investment
Loans	0	0
Consumer \| Doubtful \| Consumer and installment
Financing Receivable, Recorded Investment
Loans	$ 0	$ 0