Loans and Allowance for Loan Losses (Schedule of Loans Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 987,327	$ 996,340	$ 1,014,966
Construction and Land Development Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	57,613	69,325
Other Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	496,862	505,180
Asset-based Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	42,436	37,540
Other Commercial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	113,454	117,790
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	37,196	37,024
Other 1-4 Family Residential Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	197,629	186,815
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 42,137	$ 42,666