Loans and Allowance for Loan Losses (Loans on Nonaccrual Status) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 7,277	$ 7,444
Other real estate owned	24,820	25,970
Total nonperforming crdit-related assets	32,097	33,414
Construction and Land Development Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	891	817
Other Commercial Real Estate Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	2,895	4,244
Asset-based Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	81	81
Other Commercial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	612	694
Home Equity Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	70	72
Other 1-4 Family Residential Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	2,684	1,524
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 44	$ 12