Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 911,597	$ 859,732
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	317,321	321,908
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	31,341	23,136
Agricultural loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	60,948	63,182
Farm loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	86,256	72,586
Motels and Hotels Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	45,783
Non-residential Buildings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	89,940
Residential Buildings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 59,848