Loans and Leases - Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	$ 3,213	$ 38,207
Accruing Troubled Debt Restructured Loans and Lease Modifications	13,457	3,893
Total Impaired Loans and Leases	45,589	42,100
Commercial, financial and agricultural [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	2,842	4,614
Accruing Troubled Debt Restructured Loans and Lease Modifications	480	77
Total Impaired Loans and Leases	3,322	4,691
Real estate-commercial [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	14,340	18,085
Accruing Troubled Debt Restructured Loans and Lease Modifications	10,523	2,435
Total Impaired Loans and Leases	24,863	20,520
Real estate-construction [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	13,588	14,479
Accruing Troubled Debt Restructured Loans and Lease Modifications	2,397	1,262
Total Impaired Loans and Leases	15,985	15,741
Real estate-residential secured for business purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	172	107
Accruing Troubled Debt Restructured Loans and Lease Modifications		8
Total Impaired Loans and Leases	172	115
Real estate-residential secured for personal purpose [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	804	57
Total Impaired Loans and Leases	804	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
Total Impaired Loans and Leases		27
Loans to individuals [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Accruing Troubled Debt Restructured Loans and Lease Modifications	38	50
Total Impaired Loans and Leases	38	50
Lease financings [Member]
Nonaccrual and Accruing Troubled Debt Restructured Loans and Lease Modifications
Nonaccrual Loans and Leases	386	838
Accruing Troubled Debt Restructured Loans and Lease Modifications	19	61
Total Impaired Loans and Leases	$ 405	$ 899