Loans and Allowance for Loan Losses (Loans on Nonaccrual Status) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 6,443	$ 17,177
Other real estate owned	31,077	36,952
Total nonperforming crdit-related assets	37,520	54,129
Construction and Land Development Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	1,373	4,398
Other Commercial Real Estate Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	2,557	9,937
Asset-based Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	0	0
Other Commercial Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	629	913
Home Equity Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	116	474
Other 1-4 Family Residential Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	1,748	1,422
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total nonaccrual loans	$ 20	$ 33