Non-Performing Loans and Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	$ 15,887	$ 14,368
Loans Past Due Over 90 Days Still Accruing	109	37
Non Performing TDR's	5,061	2,198
Performing TDR's	2,981	3,540
Total Non-Performing Loans	24,038	20,143
Commercial [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	8,922	6,905
Loans Past Due Over 90 Days Still Accruing	9
Non Performing TDR's	2,468	1,053
Total Non-Performing Loans	11,579	7,958
Commercial [Member] | Owner occupied real estate [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	3,887	2,515
Non Performing TDR's	1,472
Total Non-Performing Loans	5,359	2,515
Commercial [Member] | Non owner occupied real estate [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	3,754	3,970
Non Performing TDR's	375	152
Total Non-Performing Loans	4,129	4,122
Commercial [Member] | Residential development [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual
Loans Past Due Over 90 Days Still Accruing
Non Performing TDR's
Performing TDR's
Total Non-Performing Loans
Commercial [Member] | Development & Spec Land Loans [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	789	90
Total Non-Performing Loans	789	90
Commercial [Member] | Commercial and industrial [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	492	330
Loans Past Due Over 90 Days Still Accruing	9
Non Performing TDR's	801	901
Total Non-Performing Loans	1,302	1,231
Real estate [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	4,266	4,694
Loans Past Due Over 90 Days Still Accruing	57
Non Performing TDR's	2,361	1,120
Performing TDR's	2,149	2,682
Total Non-Performing Loans	8,833	8,496
Real estate [Member] | Residential mortgage [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	4,266	4,550
Loans Past Due Over 90 Days Still Accruing	57
Non Performing TDR's	2,361	1,120
Performing TDR's	1,857	2,389
Total Non-Performing Loans	8,541	8,059
Real estate [Member] | Residential construction [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual		144
Performing TDR's	292	293
Total Non-Performing Loans	292	437
Real estate [Member] | Mortgage warehouse [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual
Loans Past Due Over 90 Days Still Accruing
Non Performing TDR's
Performing TDR's
Total Non-Performing Loans
Consumer [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	2,699	2,769
Loans Past Due Over 90 Days Still Accruing	43	37
Non Performing TDR's	52	25
Performing TDR's	832	858
Total Non-Performing Loans	3,626	3,689
Consumer [Member] | Direct Installment [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	97	256
Loans Past Due Over 90 Days Still Accruing	1	1
Total Non-Performing Loans	98	257
Consumer [Member] | Direct Installment Purchased [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Loans Past Due Over 90 Days Still Accruing		4
Total Non-Performing Loans		4
Consumer [Member] | Indirect Installment [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	923	926
Loans Past Due Over 90 Days Still Accruing	42	29
Total Non-Performing Loans	965	955
Consumer [Member] | Home Equity [Member]
Nonaccrual, loans past due over 90 days still on accrual, and troubled debt restructured ("TDR's") by class of loans:
Nonaccrual	1,679	1,587
Loans Past Due Over 90 Days Still Accruing		3
Non Performing TDR's	52	25
Performing TDR's	832	858
Total Non-Performing Loans	$ 2,563	$ 2,473