Loans and Leases - Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	$ 36,762	$ 38,207
Accruing Troubled Debt Restructured Loans and Lease Modifications	7,591	3,893
Total Impaired Loans and Leases	44,353	42,100
Commercial, financial and agricultural [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	3,948	4,614
Accruing Troubled Debt Restructured Loans and Lease Modifications	1,699	77
Total Impaired Loans and Leases	5,647	4,691
Real estate-commercial [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	17,861	18,085
Accruing Troubled Debt Restructured Loans and Lease Modifications	3,015	2,435
Total Impaired Loans and Leases	20,876	20,520
Real estate-construction [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	13,887	14,479
Accruing Troubled Debt Restructured Loans and Lease Modifications	2,782	1,262
Total Impaired Loans and Leases	16,669	15,741
Real estate-residential secured for business purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	177	107
Accruing Troubled Debt Restructured Loans and Lease Modifications		8
Total Impaired Loans and Leases	177	115
Real estate-residential secured for personal purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	312	57
Accruing Troubled Debt Restructured Loans and Lease Modifications
Total Impaired Loans and Leases	312	57
Real estate-home equity secured for personal purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases		27
Accruing Troubled Debt Restructured Loans and Lease Modifications
Total Impaired Loans and Leases		27
Loans to individuals [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases
Accruing Troubled Debt Restructured Loans and Lease Modifications	49	50
Total Impaired Loans and Leases	49	50
Lease Financings [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	577	838
Accruing Troubled Debt Restructured Loans and Lease Modifications	46	61
Total Impaired Loans and Leases	$ 623	$ 899