Loans (Loans Held For Investment By Loan Type) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	$ 1,363,187	$ 1,320,760
Less: Unearned loan fees	(875)	(843)
Loans, net of unearned fees	1,362,312	1,319,917
Less allowance for loan losses	(21,550)	(21,005)
Net loans, held for investment	1,340,762	1,298,912
Residential And Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	904,124	866,507
Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	67,862	77,657
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	288,865	271,843
Agricultural Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	10,917	10,772
Installment Loans To Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	60,010	60,932
SBA [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	30,839	31,010
Other Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for investment, Gross	$ 570	$ 2,039