Loans, Major Classifications of Loans (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross before deferred net origination costs (fees)	$ 691,766	$ 574,382
Deferred net origination costs (fees)	(47)	(28)
Balance, end of period	691,719	574,354	556,314
Less allowance for loan losses	3,394	3,588
Loans, net	688,325	570,766
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross before deferred net origination costs (fees)	38,919	29,337
Balance, end of period	38,882	29,306	33,277
Commercial Secured By Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross before deferred net origination costs (fees)	377,806	314,252
Balance, end of period	377,439	313,913	296,213
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross before deferred net origination costs (fees)	243,966	215,587
Balance, end of period	244,247	215,842	210,150
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross before deferred net origination costs (fees)	20,015	12,643
Balance, end of period	20,091	12,730	13,436
Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross before deferred net origination costs (fees)	8,466	2,472
Balance, end of period	8,466	2,472	2,838
Other Loans Including Deposits Overdraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, gross before deferred net origination costs (fees)	2,594	91
Financial Receivable Acquired Credit Imparied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, end of period	20,760	6,027
Less allowance for loan losses	415	0
Loans, net	20,345	6,027
Financial Receivable Acquired Credit Imparied [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, end of period	2,501	332
Financial Receivable Acquired Credit Imparied [Member] | Commercial Secured By Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, end of period	13,461	4,363
Financial Receivable Acquired Credit Imparied [Member] | Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, end of period	3,930	1,332
Financial Receivable Acquired Credit Imparied [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, end of period	215	0
Financial Receivable Acquired Credit Imparied [Member] | Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, end of period	115	0
Financial Receivable Acquired Credit Imparied [Member] | Other Loans Including Deposits Overdraft [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance, end of period	$ 538	$ 0